CN113622912A

CN113622912A - Outburst eliminating process for coal seam mining

Info

Publication number: CN113622912A
Application number: CN202110874310.6A
Authority: CN
Inventors: 张建国; 范付恒; 王贺举; 杨晓康
Original assignee: PINGDINGSHAN ANTAIHUA MINING SAFETY EQUIPMENT MANUFACTURING CO LTD
Current assignee: PINGDINGSHAN ANTAIHUA MINING SAFETY EQUIPMENT MANUFACTURING CO LTD
Priority date: 2021-07-30
Filing date: 2021-07-30
Publication date: 2021-11-09
Anticipated expiration: 2041-07-30
Also published as: CN113622912B

Abstract

The invention belongs to the technical field of coal seam mining, and particularly relates to a outburst elimination process for coal seam mining. According to the process, the first roadway and/or the second roadway are/is internally provided with the slotting outburst elimination equipment, so that coal seams on the working face are slotted to form continuous outburst elimination seams, a displacement and expansion deformation space can be created for coal bodies outside the seams of the coal seams, the fractures of the coal bodies are increased, the desorption and the emission of gas are accelerated, the pressure relief extraction of the gas in the coal bodies in the mining sections is realized, and the outburst elimination purpose is achieved. The method greatly improves the air permeability of the coal seam, is beneficial to quickly releasing gas, and can effectively reduce the labor intensity and the gas extraction period, reduce the investment of manpower and financial resources and save the cost compared with the traditional intensive drilling mode.

Description

Outburst eliminating process for coal seam mining

Technical Field

The invention belongs to the technical field of coal seam mining, and particularly relates to a outburst elimination process for coal seam mining.

Background

With the gradual exhaustion of shallow coal resources, coal mines in China enter deep mining stages successively, coal and gas outburst disasters become more serious, and pre-pumping coal seam gas and a mining protective layer are effective outburst elimination measures for safety mining of outburst coal seams. No matter whether the mining condition of a protective layer exists or not, surface drilling, cross-layer drilling or bedding drilling and pre-pumping coal bed gas are necessary choices for eliminating outbursts of the coal bed. The gas drilling of the pre-pumping coal seam becomes a main factor for restricting the mine production succession due to large drilling engineering quantity and long construction period. And in a few mines, soft mudstone at the top/bottom of a coal mining layer is used as a protective layer, and outburst elimination of a outburst coal layer is realized by matching with drilling and pre-pumping coal layer gas. The exploitation of the mudstone as a protective layer not only increases the investment of gas control, but also needs drilling to extract coal bed gas, and in addition, the more exploited mudstone also forms the discharge of solid waste.

In the single outburst coal seam gas treatment process, a first roadway and a second roadway top/bottom plate rock roadway are generally constructed firstly, coal seam strip gas is pre-pumped by utilizing the rock roadway to construct coal seam cross-layer drilling holes, after outburst elimination of a coal seam strip area is realized, coal seam bedding drilling holes are constructed in the first roadway and the second roadway, and the coal seam gas is pre-pumped by matching with coal seam strengthening anti-reflection measures. Because the prediction range of bedding drilling is limited, a dense drilling mode is adopted, on one hand, the quantity of bedding drilling is large, the drilling construction quantity is huge, a large amount of manpower, material resources and financial resources are consumed, and the additional value is extremely low; on the other hand, the deep coal mine is deep, the length of a single drilling hole is large, so that the drilling track is easy to deviate, the effective coverage of the whole area of the coal bed in the working face range is difficult to ensure, a blank zone is formed, the local outburst elimination is caused to be not up to the standard, and potential safety hazards are buried for the working face mining.

Disclosure of Invention

Aiming at the defects and problems of large number of drilled holes, consumption of a large amount of manpower and financial resources, easy deviation of drilling track and substandard outburst elimination existing in the current intensive drilling outburst elimination process, the invention abandons the traditional outburst elimination mode of arranging drilled holes, and provides a process for carrying out pressure relief by cutting a coal bed to form continuous outburst elimination seams, thereby being more beneficial to the release of gas, improving the safety of underground construction, effectively reducing the labor intensity and the gas extraction period, reducing the investment of manpower and financial resources and saving the cost.

The technical scheme adopted by the invention for solving the technical problems is as follows: a coal seam mining outburst elimination process comprises the following steps:

firstly, constructing a working roadway along the depth at the position of a main roadway in a coal seam, and constructing a first roadway and a second roadway at the left end and the right end of the working roadway along the transverse direction;

then, constructing initial cutting holes at the tail ends of the first roadway and the second roadway to communicate the first roadway with the second roadway, wherein the initial cutting holes are the initial positions of coal seam cutting;

and then, laying a working platform on the ground of the first roadway and/or the second roadway, arranging a chain plate machine on the ground in front of the working platform and the coal bed, arranging a coal bed seam cutting and outburst eliminating device on the working platform, wherein the coal bed seam cutting and outburst eliminating device comprises a walking driving mechanism and a seam cutting mechanism, the seam cutting mechanism is connected with the walking driving mechanism, the walking driving mechanism is used for walking and advancing on the working platform, and the seam cutting mechanism is placed at an initial cutting hole position for communicating the first roadway and the second roadway and integrally cuts the coal bed to form a cutting seam along with the walking and advancing of the walking driving mechanism.

In the coal seam mining outburst elimination process, the walking driving mechanism comprises a walking platform and a driving motor or a hydraulic motor, the driving motor or the hydraulic motor is arranged on the walking platform, and a supporting sleeve corresponding to an output rotating shaft of the driving motor or the hydraulic motor is arranged on the walking platform; the slotting mechanism is a spiral cutting knife which comprises a cylindrical central shaft and a spiral knife body, the knife body is arranged on the outer side of the central shaft, a spiral discharge channel is formed on the outer side of the central shaft, and convex knife heads are arranged on the outer side of the knife body at intervals; one end of the central shaft is sleeved in the supporting sleeve and is in transmission connection with an output rotating shaft of the driving motor or the hydraulic motor.

According to the coal seam mining outburst elimination process, the walking crawler belt is arranged at the bottom of the walking platform, the supporting oil cylinder is vertically arranged on the walking platform, the supporting seat is arranged at the upper part of the supporting oil cylinder, and the driving motor or the hydraulic motor is arranged on the supporting seat.

According to the coal seam mining outburst elimination process, the reinforcing support frame is fixed on one side of the walking platform, and the support sleeve is fixed at the end of the reinforcing support frame and corresponds to the output rotating shaft of the driving motor or the hydraulic motor.

According to the outburst elimination process for coal seam mining, the other end of the spiral cutting knife goes deep into a coal seam and is rotatably provided with the jacking sleeve, the jacking rod is located on the rear side of the spiral cutting knife, the rod body of the jacking rod is fixed on the outer side of the jacking sleeve, and the cylinder body of the jacking rod is fixed on the coal seam.

According to the coal seam mining outburst elimination process, the central shaft comprises a plurality of shaft units, each shaft unit is provided with an independent cutter body, the shaft units are connected in a butt joint mode, and the adjacent cutter bodies are correspondingly connected together to form a spiral discharge channel.

According to the coal seam mining outburst elimination process, the driving motors or the hydraulic motors are arranged at the two ends of the central shaft, and the driving motors or the hydraulic motors at the two sides are respectively fixed on the corresponding walking platforms and walk in the roadway at the corresponding side.

The central shaft comprises a plurality of flexible shaft units, the flexible shaft units are connected through universal joints to form an integrated central flexible shaft, two ends of the central flexible shaft are sleeved in the supporting sleeves and are in transmission connection with the output rotating shaft, the cutter body is spirally arranged on the central flexible shaft, and cutter heads are arranged on the outer side surface of the cutter body at intervals.

In the coal seam mining outburst elimination process, the central flexible shaft is spirally provided with the continuous spiral conveying body and the intermittent cutter bodies, each flexible shaft unit is provided with the independent cutter body, the cutter head on each cutter body protrudes out of the spiral conveying body, a gap is reserved between every two adjacent cutter bodies, and the spiral conveying bodies are sequentially and spirally connected with the flexible shaft units to form the continuous discharge channel.

The cutter body comprises a left-handed section and a right-handed section which are opposite in spiral direction, the left-handed section and the right-handed section are the same in length, the middle parts of the left-handed section and the right-handed section are butted together, and the outer ends of the left-handed section and the right-handed section are respectively sleeved in the supporting sleeves on the corresponding sides and are in transmission connection with the output rotating shaft.

In the coal seam mining outburst elimination process, the walking driving mechanism comprises a walking platform, a driving motor and a driving box, the driving motor is arranged on the walking platform, an output rotating shaft of the driving motor is in transmission connection with an input shaft of the driving box, and a driving shaft is arranged on the driving box; the slotting mechanism is a chain plate type circulating digging cutter which comprises a chain plate, a shaft bracket, a main driving wheel, a secondary driving wheel and a digging cutter; the shaft frame is fixed on the walking platform, the inner end and the outer end of the shaft frame are respectively provided with a driven wheel and a main driving wheel, the main driving wheel is in transmission connection with the driving shaft, the chain plate is sleeved on the main driving wheel and the driven wheel, and the outer side of the chain plate is provided with a digging cutter.

In the coal seam mining outburst elimination process, the inner end of the shaft bracket is provided with the auxiliary travelling mechanism, and the auxiliary travelling mechanism comprises a hydraulic drive motor and a travelling shifting wheel; the hydraulic driving motor is arranged at the inner end of the shaft frame and is close to the driven wheel, a rotating shaft is arranged at the eccentric position of the walking thumb wheel and is in transmission connection with an output shaft of the hydraulic driving motor, and the walking thumb wheel can be located below the shaft frame along with rotation.

According to the coal seam mining outburst elimination process, the walking shifting wheel comprises a rotating shaft, an upper eccentric wheel and a lower eccentric wheel, and the upper eccentric wheel and the lower eccentric wheel are alternately sleeved on the rotating shaft.

According to the coal seam mining outburst elimination process, the walking crawler belt is arranged on the walking platform, the supporting oil cylinder is vertically arranged on the walking platform, the supporting seat is arranged on the upper portion of the supporting oil cylinder, and the driving motor and the driving box are arranged on the supporting seat.

In the coal seam mining outburst elimination process, the inner end of the shaft bracket extends upwards or downwards to be provided with the top plate, the top plate is close to the driven wheel, and the top plate is provided with the hydraulic ejector rod or the drill rod of the drilling machine.

In the coal seam mining outburst elimination process, the chain plate type circulating digging cutters are arranged in multiple layers at intervals, the top plate is connected with the adjacent shaft brackets, and the driving end of the driving ejector rod is fixed on the top plate.

In the coal seam mining outburst elimination process, the chain plate type circulating digging cutter is of a triangular structure, two main driving wheels and one driven driving wheel are fixed on three supporting points of the shaft frame, the two main driving wheels are in transmission connection with the two main driving shafts, the driven driving wheel is located at the far end of the walking platform, the chain plate is sleeved on the main driving wheels and the driven driving wheels, and the main driving wheels and the driven driving wheels are belt wheels or gears.

In the coal seam mining outburst elimination process, the chain plate type circulating digging cutter spans across the coal seam, the two ends of the chain plate type circulating digging cutter are respectively provided with the traveling driving mechanisms, and the driven wheels are sleeved on the driving shafts on the corresponding sides.

According to the coal seam mining outburst elimination process, the inner end of the shaft bracket is provided with the adjusting seat in a sleeved mode, the adjusting seat and the shaft bracket are provided with the adjusting rod, and the driven wheel is arranged on the adjusting seat.

The invention has the beneficial effects that:

1. according to the invention, the seam cutting outburst elimination equipment is arranged in the first roadway and/or the second roadway, so that the seam of the coal bed on the working surface is cut to form a continuous outburst elimination seam, a displacement and expansion deformation space can be created for the coal body outside the seam of the coal bed, the coal body fractures are increased, the desorption and emission of gas are accelerated, the pressure relief extraction of the gas in the coal body of the mining section is realized, and the outburst elimination purpose is achieved. The method greatly improves the air permeability of the coal seam, is beneficial to quickly releasing gas, and can effectively reduce the labor intensity and the gas extraction period, reduce the investment of manpower and financial resources and save the cost compared with the traditional intensive drilling mode.

2. The process for eliminating the outburst of the slotting machine can achieve the purpose of eliminating the outburst of the slotting through the travelling mechanism and the spiral cutting knife, and the travelling platform is arranged, so that the process not only can be used as an installation platform of equipment, but also can be used for travelling in a pre-excavated roadway; the driving motor is used for driving the output rotating shaft to be connected with the output rotating shaft through a speed reducer. The reinforcing support frame and the support sleeve are used for stably supporting the spiral cutting knife, and the end part of the spiral cutting knife is in transmission connection with an output rotating shaft of the speed reducer through the support sleeve, so that the power transmission stability is ensured while the power transmission is ensured; support the cover and correspond the setting with the output pivot, make helical cutting knife can last stable rotation, helical cutting knife is used for deepening in the coal seam, and along with the walking of walking platform, utilize the blade of helical cutting knife side when rotating, carry out the rotary cutting to the coal seam, and export the cinder that will produce outside to the cutting gap through spiral helicine discharge passage, thereby at the inside crosscut in coal seam, the production has the cutting gap of certain thickness, the coal of surely cutting is seen off through the chain trigger, do not influence subsequent exploitation work.

3. The spiral cutting knife used by the invention can adopt a hard shaft, a combined hard shaft or a combined flexible shaft, wherein the structure of the hard shaft and the combined hard shaft can be provided with a walking platform on one side or two sides of the spiral cutting knife, so that the spiral cutting knife can be suitable for cutting coal beds in single-side roadways or double-side roadways, both the hard shaft and the combined hard shaft can be combined through a small shaft unit, the spiral cutting knife can be installed in a mode of being combined one by one in a small space, the spiral cutting knife is convenient to transport and place into the roadways, and the spiral cutting knife is suitable for the situation that the span range of the spiral cutting knife is large.

The structure of combination flexible axle, more be applicable to and cut the coal seam in two side drifts, simultaneously because it has certain deformability, can be crooked in the course of the work, if meet the situation such as hard thing, can follow the bending of hard thing department, avoid destroying.

4. The spiral cutting knife has a continuous or intermittent structure, the knife body of the intermittent structure is independently arranged on the flexible shaft unit, in order to enable a cut coal bed to be smoothly conveyed to the outside, the central flexible shaft is also provided with a continuous spiral conveying body to form a continuous discharging channel, the knife body is used for cutting, and the spiral conveying body is used for discharging cutting coal slag to avoid the coal slag from being retained in a cutting seam.

5. The invention adopts the slotting device of the chain plate type circulating digging cutter, adopts the digging cutter embedded on the circulating chain plate to spirally discharge slotting coal powder to two sides, improves slotting efficiency and the discharge of the slotting coal powder, greatly improves the air permeability of a coal bed, reduces the labor intensity of drilling construction and the gas extraction period, adopts the mode of the digging cutter embedded on the circulating chain plate to cut a gap to the coal bed, relieves pressure and increases the permeability of the coal bed, and adopts the novel circulating chain plate digging cutter slotting equipment and the intelligent operation equipment to discharge coal to two sides during slotting, so that the construction process can be automatically carried out, and the underground construction safety is improved.

6. The walking driving mechanism of the invention provides power for rotating and pushing forward for the chain plate type circulating digging cutter from the outer side, namely the roadway, namely the driving motor and the driving box are used for providing rotating power, and the moving function of the walking platform is used for driving the chain plate type circulating digging cutter to push forward, so that the coal seam to be cut is cut and a cutting seam is formed in the coal seam to be cut.

7. According to the invention, different chain plate type circulating digging tools can be selected according to a single-side roadway and a bilateral roadway to realize slotting, and for the single-side situation, the walking shifting wheel is arranged at the driven wheel in the coal seam, is of an eccentric structure, can be actively driven to rotate and provides auxiliary walking power in the coal seam, and is matched with a walking driving mechanism in the roadway to jointly complete the advancing power of the chain plate type circulating digging tools; or a top plate can be arranged at a position close to the driven wheel, an active ejector rod is arranged on the top plate, the active ejector rod has certain power and can drive the top plate to move forwards, so that power is formed from the inside of the driven wheel and is matched with an external walking driving mechanism to realize the advancing power of the chain plate type circulating digging cutter; for the roadways at two sides, the invention can arrange the walking driving mechanisms in the roadways at two sides, the chain plate type circulating digging cutter spans the coal seam to be cut and treated and is connected with the walking driving mechanisms synchronously walking and driving at two sides, and the walking driving mechanisms synchronously walking and driving at two sides provide power for the chain plate type circulating digging cutter to walk forwards and rotate.

Drawings

FIG. 1 is a schematic view of a coal seam cutting seam according to the present invention

FIG. 2 is a schematic diagram of a coal seam cutting seam according to the present invention.

Fig. 3 is a schematic view of the overall structure of the present invention using a helical cutting blade.

Fig. 4 is a schematic structural view of the reinforcing support frame.

Fig. 5 is a first structural schematic diagram of the travel driving mechanism.

Fig. 6 is a schematic structural view of a jacking sleeve and a jacking rod for a helical cutting knife.

Fig. 7 is a schematic structural view of the double-sided travel driving mechanism.

FIG. 8 is a schematic structural view of another embodiment of a central shaft.

Fig. 9 is a structural schematic diagram of an embodiment of the double discharging flexible shaft.

Fig. 10 is a schematic structural diagram of a double discharging flexible shaft.

FIG. 11 is a first structural diagram illustrating a use process of the present invention.

FIG. 12 is a schematic view of the entire slotting and routing apparatus using the chain plate type circulating digging cutter of the present invention.

Fig. 13 is a schematic view of a second walking driving structure of the present invention.

Fig. 14 is a schematic structural view of a chain plate type circulating digging cutter.

Fig. 15 is a first schematic view of an adjusting manner of the adjusting base.

Fig. 16 is a second schematic view of an adjusting manner structure of the adjusting base.

Fig. 17 is a schematic structural view of the auxiliary traveling mechanism.

Fig. 18 is a schematic structural view of the walking wheel.

Fig. 19 is a schematic structural view of the active mandril.

Fig. 20 is a schematic structural view of the top plate.

Fig. 21 is a structural view of an embodiment of a triangular link plate type circulating excavating tool.

Fig. 22 is a structural schematic diagram of bilateral walking drive of a slotting and outburst elimination device of the chain plate type circulating digging cutter.

Reference numbers in the figures: the device comprises a rock layer 1, a rock layer 2, a coal layer 3, a roadway I4, a roadway II 5, a cutting seam 6, a traveling platform 7, a driving motor 8, an output rotating shaft 9, a support sleeve 10, a reinforcing support frame 11, a spiral cutter 12, a central shaft 13, a cutter body 14, a cutter head 15, a flexible shaft unit 16, a universal joint 17, a driving shaft 18, a jacking sleeve 19, a hydraulic ejector rod 20, a driving box 21, a chain plate type circulating digging cutter 22, a chain plate 23, a digging cutter 24, a shaft bracket 25, a main driving wheel 26, a driven driving wheel 27, an adjusting seat 28, a guide groove 29, an adjusting rod 30, a guide shaft 31, a hydraulic driving motor 32, a traveling shifting wheel 33, a top plate 34 and a hydraulic ejector rod or a drilling machine 35.

Detailed Description

The invention is further illustrated with reference to the following figures and examples.

Example 1: the embodiment provides a coal seam mining outburst elimination process, which is used for carrying out pressure relief by cutting a coal seam to form a continuous outburst elimination seam, and specifically comprises the following steps:

firstly, constructing a working roadway along the depth at the position of a main roadway in a coal seam, and constructing a first roadway 4 and a second roadway 5 along the transverse direction at the left end and the right end of the working roadway;

then, constructing an initial cutting hole at the tail end of the first roadway and/or the second roadway to communicate the first roadway with the second roadway, wherein the initial cutting hole is the initial position of the coal seam cutting seam;

and then, laying a working platform on the ground of the first roadway and/or the second roadway, arranging a chain plate machine on the ground in front of the working platform and the coal bed, and arranging a coal bed slotting and outburst elimination device on the working platform. As shown in fig. 3, the seam slotting outburst elimination device used in this embodiment includes a walking driving mechanism and a spiral cutting knife 12, the walking driving mechanism includes a walking platform 7 and a driving mechanism, wherein the walking platform 7 is used for walking in a roadway and is used as an installation platform of equipment, a driving motor (a hydraulic motor can also be used) 8 is installed on the walking platform 7, and the driving motor 8 is used for being in transmission connection with an output rotating shaft 9 through a rotating power and a speed reducer.

The spiral cutting knife 12 comprises a cylindrical central shaft 13 and a spiral cutter body 14, the cutter body 14 is arranged on the outer side of the central shaft 13, a spiral discharge channel is formed on the outer side of the central shaft 13, and convex cutter heads 15 are arranged on the outer side of the cutter body 14 at intervals; one end of the central shaft 13 is sleeved in the support sleeve 10 and is in transmission connection with the output rotating shaft 9 of the driving motor 8.

In the embodiment, as shown in fig. 3, the spiral cutting device is suitable for a single roadway, a walking platform walks in the single roadway through a walking crawler and drives a spiral cutting knife to rotate and transversely translate, as shown in fig. 4-5, a reinforcing support frame 11 is fixed on one side of the walking platform 7, a support sleeve 10 corresponding to an output rotating shaft 9 is arranged at the end part of the reinforcing support frame 11, the inner end of the spiral cutting knife 12 is sleeved in the support sleeve 10 and is in transmission connection with the output rotating shaft 9, the outer end of the spiral cutting knife 12 extends into a coal seam, a supporting and stabilizing structure is arranged at the outer position of the spiral cutting knife, the support sleeve is arranged at the outer side of the output rotating shaft at a certain distance, the outer part of the spiral cutting knife is sleeved in the support sleeve and extends to the output rotating shaft to be in transmission connection with the output rotating shaft, the spiral cutting knife has the functions of positioning and stabilizing the spiral cutting knife, and ensures that the spiral cutting knife has a horizontal section with a certain length at the output end, the horizontal section is parallel to the output rotating shaft, so that the output rotating shaft can stably output power.

During the concrete implementation, this embodiment is for realizing the walking function, be provided with the walking track on walking platform 7, install on the walking platform along vertical support cylinder that is provided with, upper portion at support cylinder is provided with the supporting seat, support cylinder is used for adjusting the height of supporting seat, make the height-matching of helical cutting knife 12 and cutting cut, driving motor 8 and speed reducer are installed on the supporting seat, strengthen support frame 11 and decide the one side at the supporting seat, it is provided with the support cover 10 that corresponds with driving motor or hydraulic motor's output pivot to strengthen support frame 11 tip, the tip of backup pad still is provided with the operation workstation, be provided with intelligent display screen and display instrument on the operation workstation.

This embodiment is used for laying driving motor or hydraulic motor's supporting seat is liftable, and its effect can the adaptability adjust helical cutting knife's mounting height, makes helical cutting knife and the high adaptation of just cutting the eye, convenient to use, and the function is various.

As shown in fig. 5, the supporting sleeve 10 is a bearing or a shaft sleeve, the reinforcing supporting frame 11 includes a horizontal fixing support and an inclined support integrally arranged, the horizontal fixing support is fixed on the supporting base, an outer sleeve is arranged at the end of the inclined support, and the bearing or the shaft sleeve is sleeved on the outer sleeve and is arranged in one or more groups.

When the coal seam cutting device is used, a through primary cutting hole is dug in a coal seam to be cut, the spiral flexible shaft cutter 6 is placed into the primary cutting hole, the walking driving mechanism is arranged in a roadway, two ends of the spiral flexible shaft cutter 6 are respectively connected to the output end of the walking driving mechanism, the walking platform is started to drive the spiral cutter to slowly walk forwards, the spiral cutter is driven to rotate by a driving motor or a hydraulic motor in the walking process, the spiral cutter cuts the inner area of the coal seam in the coal seam, the sawing thickness can be controlled to be about 200mm, the thickness of the cutting seam is not too large in the implementation process, so that coal and gas outburst accidents are prevented during the cutting seam, the generated coal seam is output into the roadway, the coal seam generates a cutting seam with a certain thickness, and gas in the coal seam is output and discharged by utilizing the cutting seam, compared with the traditional permeability-increasing method, the labor intensity and the gas extraction period of drilling construction are reduced, meanwhile, the blank zone of gas extraction caused by the deviation of the drilling track is eliminated, the method is a pioneering innovation, the effectiveness of the outburst prevention effect is improved, the workload of underground tunneling roadways is reduced, and the device 0 has a compact structure, is convenient to extract coal seam gas and improves the safety.

Example 2: the present embodiment is the same as the slotting process of embodiment 1, and is not described herein again, except that: the structure that this embodiment adopted when the slot is different with embodiment 1, mainly embody and be applicable to the construction in the unilateral tunnel in this embodiment to inner at the helical cutting sword sets up the shore structure. Specifically, as shown in fig. 6, the other end of the helical cutting knife 12 extends into the coal seam and is rotatably provided with a jacking sleeve 19, the jacking rod 8 is located at the rear side of the helical cutting knife, the rod body of the jacking rod is fixed at the outer side of the jacking sleeve, and the cylinder body of the jacking rod is fixed on the coal seam.

In the embodiment, the ejector rod is a hydraulic ejector rod 20, the rear side of the advancing direction of the spiral cutting knife 12 is provided, the rod body of the hydraulic ejector rod 20 is fixed on the outer side of the jacking sleeve 19, and the cylinder body of the hydraulic ejector rod is fixed on a coal seam; and secondly, the hydraulic ejector rod provides forward thrust at the inner end of the spiral cutting knife, and the inner side and the outer side of the spiral cutting knife synchronously apply force, so that the stability of the spiral cutting knife in the coal seam cutting process is improved.

Example 3: this example is substantially the same as example 1, except that: the present embodiment further illustrates the structure of the central shaft.

This embodiment center pin is the combined shaft, and center pin 13 includes a plurality of axle units, all is provided with independent cutter body on every axle unit, and the butt joint is in the same place between the axle unit, and each adjacent cutter body corresponds to link together and form spiral helicine discharge passageway.

During the concrete implementation, center pin 13 is assembled through a plurality of independent axle units and is formed, after the primary cut hole forms, can be in the tunnel one section the spiral cutting knife carry out the built-up connection, avoid when placing the spiral cutting knife, need the big problem in space, the axle unit is when the combination, each section axle unit is round axle structure, a side end is provided with the connector, another side end is provided with the connecting hole, be provided with a periodic heliciform cutter body on the axle unit, thereby make the combination accomplish the back, the center pin outside forms a heliciform cutter body of enclosed construction, the outside sets up the tool bit, utilize the tool bit to cut the coal seam, the closed spiral passageway is arranged the material.

When the spiral cutting knife is operated, the connector and the connecting hole can be in threaded connection, and the threaded connection direction is opposite to the rotation direction of the spiral cutting knife, so that when the spiral cutting knife rotates, the cutter head collides with a coal bed, and the connection strength of the connector and the connecting hole can be further increased; the pin hole and the pin shaft can be used as required, and the pin can be fixed after the thread assembly is finished; and a splicing mode of a square shaft and a square hole can be adopted, and then the direct pinning is carried out.

Example 4: this example is substantially the same as example 1, except that: the present embodiment is an embodiment applicable to a bilateral roadway.

As shown in fig. 7, the two ends of the central shaft 13 in this embodiment are both provided with driving motors for driving the central shaft to rotate, the driving motors or hydraulic motors 8 on the two sides are respectively fixed on the corresponding traveling platforms 7 and rotate synchronously, and travel in the tunnels on the corresponding sides, that is, the left and right sides of the helical cutting knife are respectively and correspondingly provided with a left driving traveling mechanism and a right driving traveling mechanism, the left driving traveling mechanism and the right driving traveling mechanism are respectively located in the tunnels on the two sides, the double-discharging helical cutting knife 6 is located in the coal seam, and the two end portions thereof penetrate through the coal seam and are in transmission connection with the left driving traveling mechanism and the right driving traveling mechanism located on the two sides.

At first form the initial cutting hole that link up in the coal seam, the helical cutting sword crosses the coal seam through initial cutting hole, then is being connected with the driving motor or the hydraulic motor who corresponds the side respectively, and the drive of this structure two sides, synchronous walking makes the helical cutting sword cut the coal seam, and two sides provide synchronous power, cuts the coal seam.

Example 5: this example is substantially the same as example 4, except that: the central shaft of the present embodiment is a flexible shaft.

As shown in fig. 11, the central shaft includes a plurality of flexible shaft units 16, the flexible shaft units 16 are connected by universal joints 17 to form an integral central flexible shaft, two ends of the central flexible shaft are sleeved in the support sleeve 10 and are in transmission connection with the output rotating shaft, the cutter body 14 is spirally arranged on the central flexible shaft, the cutter heads 15 are arranged on the outer side surface of the cutter body 14 at intervals, the central flexible shaft has certain bending capacity, and is convenient to transport in a roadway and enter into a position incision, and meanwhile, the spiral flexible shaft cutter of the invention can have certain deformation capacity, so that the cutter can be bent in the working process, and can be bent along a hard object when meeting the conditions of hard objects and the like.

When the coal cinder discharging device is specifically implemented, the central flexible shaft is spirally provided with a continuous spiral conveying body and interrupted cutter bodies, each flexible shaft unit is provided with an independent cutter body, a cutter head on each cutter body protrudes out of the spiral conveying body, a gap exists between every two adjacent cutter bodies, the spiral conveying bodies are sequentially and spirally connected with the flexible shaft units to form a continuous discharging channel, the interrupted cutter bodies and the cutter heads on the outer sides of the cutter bodies cut a coal bed, the spiral conveying bodies continuously convey generated coal cinder, and the coal cinder can be smoothly discharged out of a cutting seam.

In the embodiment, the cutter body is a hard cutter body, the spiral conveying body is made of spiral and continuous deformable materials, at least the cutter head of the cutter body protrudes out of the spiral conveying body to cut a coal bed, in addition, when the cutter body is implemented, two ends of the central flexible shaft are connected with the driving shaft 18 through the universal joint 17, the driving shaft 18 is sleeved in the support sleeve 10 and is in transmission connection with the output rotating shaft 9, the cutter body 14 is spirally arranged on the central flexible shaft, and the cutter head 15 is arranged on the outer side surface of the cutter body 14 at intervals.

The central flexible shaft of the embodiment is in transmission connection with the output rotating shaft 9 through the driving shaft 18, the driving shaft 18 receives power provided by the speed reducer, and the driving shaft can be in a horizontal state under the action of the supporting sleeve 10, so that torque on the output rotating shaft is avoided, and the safety of driving equipment is improved.

This embodiment provides a spiral flexible axle cutting knife 6 with crooked deformability, provides the rotatory and power that advances forward of spiral flexible axle cutting knife by the running drive mechanism, and the deformability of spiral flexible axle cutting knife 6 can have the deformability of adaptation after the hard thing of cutting in-process contact, avoids producing rigidity stress, makes the damage of spiral flexible axle cutting knife.

Example 6: this example is substantially the same as example 1, except that: this embodiment further illustrates the structure of the cutter body.

In the mode that all is provided with the walking drive structure to spiral cutting knife 12 both sides, the walking platform is walked in the tunnel of both sides, for the convenience of arranging the material, this embodiment has set up the cutter body that can follow both sides synchronous row material, the cutter body includes two opposite levogyration sections of spiral direction and dextrorotation section in specific structure, levogyration section and dextrorotation section middle part butt joint are in the same place, both outer ends suit respectively in the supporting sleeve that corresponds the side to be connected with the transmission of output shaft, the length that left side was arranged the cutter body and was arranged the cutter body on the right side is the same.

Coal of slotting in this embodiment is discharged to both sides through helical blade, and usable tunnel one and tunnel two in automatic control's chain trigger transport out tunnel one and tunnel two spaces, two spiral coal seam slotting equipment of side are located outside the tunnel two links of machine tunnel. A coal sawing system space of a closed working surface in the first tunnel and the second tunnel is arranged at the joint inner side of the outer openings of the first tunnel and the second tunnel; after the seam is cut, a displacement and expansion deformation space is created for the coal body outside the seam of the coal seam, so that the number of cracks of the coal body is increased, the desorption and the emission of gas are accelerated, the emitted gas enters the first roadway, the second roadway, the primary cutting hole and other roadway spaces, high-concentration gas in the closed roadway space is extracted by using a temporary gas extraction pipe arranged on the second roadway, the pressure relief extraction of the gas in the coal body in the mining section is realized, and the purpose that the gas content of the outburst elimination coal seam is lower than the production standard value is achieved.

Example 7: the present embodiment is the same as the slotting process of embodiments 1 to 6, but the adopted structure is different, specifically, as shown in fig. 12, the slotting and outburst removal device used in the present embodiment includes a traveling driving mechanism and a chain plate type circulating digging cutter 22, and the traveling driving mechanism of the device travels in a unilateral roadway and cuts the coal seam for the unilateral roadway. The outer end of the chain plate type circulating digging cutter 22 is in transmission connection with a walking driving mechanism, the main body of the chain plate type circulating digging cutter extends into a coal seam, the chain plate type circulating digging cutter 22 is driven by the walking driving mechanism to advance gradually, and the generated coal slag is output to a roadway.

As shown in fig. 13, the walking drive mechanism includes a walking platform 7, a driving motor or hydraulic motor 8 and a driving box 21, the driving motor or hydraulic motor 8 is installed on the walking platform 7, an output rotating shaft thereof is in transmission connection with an input shaft of the driving box 21, and a driving shaft 18 is arranged on the driving box 21.

In order to realize the walking function, a walking crawler belt is arranged on the walking platform 7 in the embodiment, a supporting oil cylinder vertically arranged is arranged on the walking platform 7, a supporting seat is arranged on the upper portion of the supporting oil cylinder, and a hydraulic driving motor or a hydraulic motor 8 and a driving box 21 are arranged on the supporting seat.

In this embodiment, the height of the support seat is adjusted by the support cylinder, the height of the chain plate type circulating digging cutter 22 is adaptively adjusted to match the height of the cutting seam, a primary cutting hole is formed in the coal seam to be cut, the height of the drive shaft is adjusted by the support cylinder to match the height of the middle of the primary cutting hole, and then the chain plate type circulating digging cutter is assembled on the drive shaft.

In this embodiment, the walking platform 7 is provided with a walking crawler, the walking crawler has a certain width, the walking process is stable, the walking platform 7 is provided with a supporting cylinder vertically arranged, the upper part of the supporting cylinder is provided with a supporting seat, and the cutting height can be adjusted through the supporting cylinder, so that the chain plate type circulating digging cutter 22 is matched with the height of the primary cutting channel.

In the aspect of the transmission, driving motor 8 passes through the speed reducer and is connected with drive box 21 transmission in this embodiment, and hydraulic drive motor or hydraulic motor 8, speed reducer and drive box 21 are installed on the supporting seat, and the tip of supporting seat still is provided with the operation workstation, is provided with intelligent display screen and display instrument on the operation workstation.

The chain plate type circulating digging cutter 22 comprises a chain plate 23, a shaft bracket 25, a main driving wheel 26, a secondary driving wheel 27 and a digging cutter 24; wherein the shaft bracket 25 is fixed on the walking platform 7, the inner and outer ends are respectively provided with a driven wheel 27 and a main driving wheel 26, the main driving wheel 26 is in transmission connection with the driving shaft 18, the chain plate 23 is sleeved on the main driving wheel 26 and the driven wheel 27, and the outer side of the chain plate is provided with a digging cutter 24; be provided with the enhancement support that leans out on the supporting seat during implementation, strengthen the support and be used for supporting the pedestal, improve the stability of pedestal.

The primary drive wheel 26 and the secondary drive wheel 27 are pulleys or gears; the chain plate type circulating digging cutter 22 is in transmission connection with the driving wheel, and friction transmission or gear transmission can be adopted between the chain plate type circulating digging cutter and the driving wheel, namely, the belt wheel adopts friction transmission, and the gear adopts meshing transmission.

In the embodiment, the digging cutter 24 is in a right-angled triangular protruding structure, a long right-angled edge of the digging cutter is fixed on the chain plate 23, the long right-angled edge of the digging cutter is a fixed part, a short right-angled edge of the digging cutter is a tunneling and conveying part, the digging cutter is driven by the chain plate to continuously rotate, the digging cutter is used for digging a coal bed in the rotating process, generated coal slag is temporarily stored in a cavity formed between the short right-angled edge of the digging cutter and a bevel edge of the digging cutter at the front end, and a cutting seam is conveyed out along with the rotation of the chain plate.

In the embodiment, a working face is formed by tunneling a coal seam, mainly aiming at a single working face roadway, the working face is constructed at a certain distance outside a working face stoping line, a chain plate type circulating digging cutter is utilized to cut the coal seam, the sawing thickness can be controlled to be about 200mm, the sawing thickness is not too large, so that coal and gas outburst accidents are prevented during sawing, the coal seam is pushed forwards mainly by a walking crawler belt, a driving motor or a hydraulic motor and a speed reducer drive a driving box, a main driving wheel rotates to drive a circulating chain plate, the digging cutter embedded on the chain plate cuts a seam to the coal seam, the forward tunneling is kept, the coal seam forms a space which is not soft and layered and creates displacement and expansion deformation for coal bodies, so that coal body cracks are increased, the desorption and the emission of gas are accelerated, the emitted gas enters the working face roadway space, and the temporarily arranged gas extraction pipe is utilized to extract high-concentration gas in the sawing seam space, therefore, pressure relief extraction of gas in the coal body of the mining section is realized, and the purpose that the gas in the coal bunker reaches the standard after outburst elimination treatment is achieved.

Example 8: this example is substantially the same as example 7, except that: this embodiment provides an adjustment structure at the inner end of the pedestal.

As shown in fig. 14-16, the inner end of the shaft bracket 25 is provided with an adjusting seat 28, the adjusting seat 28 and the shaft bracket 25 are provided with an adjusting rod 30, and the driven wheel 6 is arranged on the adjusting seat 28.

The chain plate type circulating digging cutter 22 is of an adjustable structure, and the specific mode is that the outer end of a shaft bracket 25 is a driving end and is provided with a main driving wheel 26 and is in transmission connection with a driving shaft 18, an adjusting seat 28 is sleeved at the inner end of the shaft bracket 25 in a matching mode, the adjusting seat 28 can slide relative to the inner end of the shaft bracket, an adjusting rod 30 is arranged between the shaft bracket and the adjusting seat along the sliding direction, the adjusting rod 30 can adjust the length and can be locked at any adjusting position, the adjusting rod can be an electric push rod or a hydraulic push rod during specific implementation, the distance between the adjusting seat and the shaft bracket can be adjusted, the further purpose is to adjust the length between the main driving wheel and a driven wheel, the tightness degree of a chain plate is adjusted adaptively, and the phenomenon that the chain plate type circulating digging cutter loosens during working is avoided.

In order to realize the relative sliding between the adjusting seat 28 and the shaft bracket 25, the end part of the shaft bracket 25 is provided with a guide groove 29, the bottom of the adjusting seat is provided with a guide block, the guide block is limited in the guide groove 29, and the guide block can slide relatively and limit the position; the adjusting rod 9 is an electric push rod or a hydraulic push rod, the adjusting rod 9 can adjust the length and can be locked at any adjusting position, the tightness degree of the chain plate 23 is adjusted in an adaptive mode, and the phenomenon that the chain plate type circulating digging cutter loosens during working is avoided.

This implementation is for realizing relative slip, can also be provided with guiding axle 31 in the inner of pedestal, be provided with the uide bushing that runs through on adjusting seat 28, guiding axle 31 matches the suit in the uide bushing, the connected mode of guiding axle and uide bushing, realize pedestal and the relative slip of adjusting the seat, and adjust the interval of action wheel and follow drive wheel through adjusting the pole, realize stable transmission between messenger's link joint and the drive wheel, in the concrete transmission mode, main drive wheel 26 and follow drive wheel 27 are the band pulley, wherein link joint is connected as the part with the drive wheel transmission in the link joint formula circulation digger, can adopt friction drive between the two, can adjust the friction size between link joint and the drive wheel through adjusting the pole, make the link formula circulation digger can bear bigger cutting load.

Example 9: this example is substantially the same as example 7, except that: the embodiment is provided with an auxiliary walking mechanism at the inner end.

As shown in fig. 17-18, a sub-traveling mechanism is provided at the inner end of the pedestal 25, wherein the sub-traveling mechanism includes a hydraulic driving motor or hydraulic motor 32 and a traveling wheel 33; the hydraulic drive motor 32 is arranged at the inner end of the shaft bracket 25 and is close to the driven wheel 27, a rotating shaft is arranged at the eccentric position of the walking thumb wheel 33, the rotating shaft is in transmission connection with the output shaft of the hydraulic drive motor or the hydraulic motor 32, and the walking thumb wheel can be positioned below the shaft bracket along with the rotation.

In order to reduce the load on the inside of the chain plate type circulating digging cutter 22 when cutting a coal seam, the embodiment is provided with an auxiliary traveling mechanism at a position close to the driven wheel, namely, the inner end of the chain plate type circulating digging cutter 22 is provided with the auxiliary traveling mechanism, and the outer end is provided with the traveling driving mechanism; when the chain plate type circulating digging cutter rotates, the walking shifting wheels can alternately shift the bottom foundation of the cutting seam, so that auxiliary power is generated at the inner end of the chain plate type circulating digging cutter and is matched with a driving walking mechanism walking in an external roadway, and the chain plate type circulating digging cutter can cut a coal seam to be cut more powerfully.

In specific implementation, the walking thumb wheel 33 comprises a rotating shaft, an upper eccentric wheel and a lower eccentric wheel, wherein the upper eccentric wheel and the lower eccentric wheel are alternately sleeved on the rotating shaft; in the embodiment, the upper eccentric wheel and the lower eccentric wheel are alternately sleeved on the rotating shaft, the two eccentric wheels with the same diameter are coaxially sleeved on the rotating shaft to form a vertically symmetrical structure, and the eccentric wheels can be contacted with the bottom of the cutting seam twice every time the rotating shaft rotates for one circle, so that auxiliary power is generated.

Example 10: this example is substantially the same as example 7, except that: in the embodiment, the inner end of the chain plate type circulating digging cutter is provided with the active power.

As shown in fig. 19-20, this embodiment has a top plate 34 extending upwardly or downwardly at the inner end of the pedestal 25, the top plate 34 being adjacent the driven wheel 27 and a hydraulic ram or drill rod 35 mounted on the top plate 34.

During implementation, multiple layers of chain plate type circulating digging cutters 22 are arranged at intervals, the top plate 34 is connected with adjacent shaft brackets, the driving end of a hydraulic ejector rod or a drill rod 35 is fixed on the top plate 34, the chain plate type circulating digging cutters are driven to advance by utilizing the moving function of the traveling platform to cut the coal seam, the inner parts of the chain plate type circulating digging cutters are driven ends, the top plate is arranged on the shaft bracket at the inner end of the chain plate type circulating digging cutters, the hydraulic ejector rod or the drill rod for actively applying force is arranged on the top plate, the fixed ends of the hydraulic ejector rod or the drill rod are in a fixed state and can be abutted against the wall of a cutting seam or fixed on a fixed seat, and therefore the pushing force matched with the traveling driving mechanism is actively applied to the inner ends of the chain plate type circulating digging cutters, and the chain plate type circulating digging cutters can stably cut the coal seam.

Example 11: this example is substantially the same as example 7, except that: the present embodiment further illustrates the shape of the chain plate type circulation blades 22.

As shown in fig. 21-22, the chain plate type circulating digging cutter is in a triangular structure, two main driving wheels 26 and a driven driving wheel 27 are fixed on three pivot points of the shaft bracket 25, wherein the two main driving wheels 26 are in transmission connection with the two main driving shafts, the driven driving wheel 27 is positioned at the far end of the walking platform 7, and the chain plate 23 is sleeved on the main driving wheels 26 and the driven driving wheels 27.

The walking driving mechanism is positioned in the roadway and can directionally walk in the roadway, the outer end of the triangular chain plate type circulating tunneling cutting knife is installed on the walking driving mechanism, the inner end of the triangular chain plate type circulating tunneling cutting knife is deep into a coal layer to be cut, the triangular chain plate type circulating tunneling cutting knife can walk along with the walking driving mechanism and can be driven to rotate at the same time, and the triangular chain plate type circulating tunneling cutting knife rotates when walking to cut the coal layer to be cut.

In a further development, two main driving wheels 26 and one slave driving wheel 27 are distributed at three corners of the same right triangle, wherein the two main driving wheels 26 are distributed at the short right-angle side and the slave driving wheels are smaller than the main driving wheels.

Two main drive wheels are connected with the output shaft transmission of drive box as the power wheel simultaneously in this embodiment, and two main drive wheels distribute on short right-angle side, and one is located walking platform's distal end from the drive wheel, utilize long limit to extend in the coal seam, and the working face is long right-angle side, utilizes the inclined plane to carry out the shore, and the triangle-shaped structure can bear great load, and stability is strong, and work safety.

The mode that this embodiment adopted triangle-chain plate formula circulation tunnelling cutting knife to cut the coal seam to cut out a gap to the coal seam, to the permeability-increasing of coal seam release, improved the discharge of slot efficiency and slot buggy, greatly improved the coal seam gas permeability simultaneously, reduced the intensity of labour and the gas drainage cycle of drilling construction, triangle-chain plate formula circulation tunnelling cutting knife adopts the triangle-shaped pulling force, and stable in structure is strong, has improved construction safety in the pit.

Example 12: this example is substantially the same as example 7, except that: the embodiment is provided with a double-side synchronous walking driving mechanism.

As shown in fig. 22, the chain plate type circulation digging cutter spans across the coal seam and is provided with a traveling drive mechanism at both ends thereof, and a driven wheel is fitted around a drive shaft on the corresponding side.

In the embodiment, roadways on two sides are pre-arranged, the roadways on the two sides are a roadway I and a roadway II respectively, a rectangular primary cutting channel which is communicated with a coal seam to be treated and dug is arranged between the roadway I and the roadway II, the chain plate type circulating digging cutter 22 is placed in the primary cutting channel, then the walking driving mechanism is placed in the roadway I and the roadway II and is connected with the chain plate type circulating digging cutter, the walking driving mechanism synchronously runs during implementation, and the chain plate type circulating digging cutter 22 synchronously pushes forwards and rotates

The embodiment utilizes tunnel one and tunnel two condition in the coal seam, the bedding drilling is not under construction, and utilize the soft layering of certain thickness in the direct saw coal seam mining layer of synchronous walking chain slat type coal seam cutting device, form the extraction of the full coal body in the working face within range, the vacuole formation, make soft layering top coal body take place down displacement and expansion deformation, soft layering bottom coal body takes place upward displacement and expansion deformation, thereby make the whole inflation of the coal body of not sawing in the coal seam and adopting, the crack increases, increase the passageway of gas release, make a large amount of gas naturally discharge and be handled under the mining influence in the coal body.

Claims

1. A coal seam mining outburst elimination process is characterized by comprising the following steps: the method comprises the following steps:

and then, laying a working platform on the ground of the first roadway and/or the second roadway, arranging a chain plate machine on the ground in front of the working platform and the coal bed, arranging a coal bed seam cutting and outburst eliminating device on the working platform, wherein the coal bed seam cutting and outburst eliminating device comprises a walking driving mechanism and a seam cutting mechanism, the seam cutting mechanism is connected with the walking driving mechanism, the walking driving mechanism is used for walking and advancing on the working platform, and the seam cutting mechanism is placed in an initial cutting hole for communicating the first roadway and the second roadway and can integrally cut the coal bed to form a cutting seam along with the walking and advancing of the walking driving mechanism.

2. The coal seam mining outburst elimination process of claim 1, wherein: the walking driving mechanism comprises a walking platform and a driving motor or a hydraulic motor, a walking crawler belt is arranged at the bottom of the walking platform, a supporting oil cylinder vertically arranged is arranged on the walking platform, a supporting seat is arranged at the upper part of the supporting oil cylinder, the driving motor or the hydraulic motor is arranged on the supporting seat, and a supporting sleeve corresponding to an output rotating shaft of the driving motor or the hydraulic motor is arranged on the walking platform; the slotting mechanism is a spiral cutting knife which comprises a cylindrical central shaft and a spiral knife body, the knife body is arranged on the outer side of the central shaft, a spiral discharge channel is formed on the outer side of the central shaft, and convex knife heads are arranged on the outer side of the knife body at intervals; one end of the central shaft is sleeved in the supporting sleeve and is in transmission connection with an output rotating shaft of the driving motor or the hydraulic motor.

3. The coal seam mining outburst elimination process of claim 2, wherein: the other end of the spiral cutting knife extends into the coal seam and is rotatably provided with a jacking sleeve, the jacking rod is positioned at the rear side of the spiral cutting knife, a rod body of the jacking rod is fixed at the outer side of the jacking sleeve, and a cylinder body of the jacking rod is fixed on the coal seam; the central shaft comprises a plurality of shaft units, each shaft unit is provided with an independent cutter body, the shaft units are connected in a butt joint mode, and the adjacent cutter bodies are correspondingly connected together to form a spiral discharging channel.

4. The coal seam mining outburst elimination process of claim 2, wherein: and driving motors or hydraulic motors are arranged at two ends of the central shaft, and the driving motors or the hydraulic motors at two sides are respectively fixed on the corresponding walking platforms and walk in the roadway at the corresponding side.

5. The coal seam mining outburst elimination process of claim 2, wherein: the center pin includes a plurality of flexible axle units, the flexible axle unit forms integrative center flexible axle through the universal joint connection, and the both ends suit of center flexible axle is in the supporting sleeve and with output shaft transmission connection, and the cutter body spiral sets up on center flexible axle, and the lateral surface interval of cutter body is provided with the tool bit.

6. The coal seam mining outburst elimination process of claim 5, wherein: the cutter body includes two opposite levogyration sections of spiral direction and dextrorotation section, and the length of levogyration section is the same with dextrorotation section, levogyration section and dextrorotation section middle part butt joint are in the same place, and both outer ends suit respectively in the support sleeve of corresponding side to be connected with output shaft transmission.

7. The coal seam mining outburst elimination process of claim 1, wherein: the walking driving mechanism comprises a walking platform, a driving motor or a hydraulic motor and a driving box, wherein a walking crawler belt is arranged on the walking platform, a supporting oil cylinder which is vertically arranged is arranged on the walking platform, a supporting seat is arranged at the upper part of the supporting oil cylinder, the driving motor or the hydraulic motor and the driving box are arranged on the supporting seat, an output rotating shaft of the driving motor or the hydraulic motor and the driving box are in transmission connection with an input shaft of the driving box, and a driving shaft is arranged on the driving box; the slotting mechanism is a chain plate type circulating digging cutter which comprises a chain plate, a shaft bracket, a main driving wheel, a secondary driving wheel and a digging cutter; the shaft bracket is fixed on the walking platform, the inner end and the outer end of the shaft bracket are respectively provided with a driven wheel and a main driving wheel, the main driving wheel is in transmission connection with the driving shaft, the inner end of the shaft bracket is provided with an auxiliary walking mechanism, the auxiliary walking mechanism comprises a hydraulic driving motor or a hydraulic motor and a walking thumb wheel, the walking thumb wheel comprises a rotating shaft, an upper eccentric wheel and a lower eccentric wheel, and the upper eccentric wheel and the lower eccentric wheel are alternately sleeved on the rotating shaft; the hydraulic driving motor or the hydraulic motor is arranged at the inner end of the shaft frame and is close to the driven wheel, a rotating shaft is arranged at the eccentric position of the walking shifting wheel, the rotating shaft is in transmission connection with an output shaft of the hydraulic driving motor or the hydraulic motor, the walking shifting wheel can be positioned below the shaft frame along with rotation, the chain plate is sleeved on the main driving wheel and the driven driving wheel, and the digging cutter is arranged on the outer side of the chain plate.

8. The coal seam mining outburst elimination process of claim 7, wherein: the chain plate type circulating digging cutter is provided with a plurality of layers at intervals, the top plate is connected with adjacent shaft brackets, the inner ends of the shaft brackets extend upwards or downwards to be provided with the top plate, the top plate is close to the driven wheel, a hydraulic ejector rod or a drill rod of a drilling machine is arranged on the top plate, and the driving end of the ejector rod is fixed on the top plate; the inner end of the shaft bracket is provided with an adjusting seat in a sleeved mode, the adjusting seat and the shaft bracket are provided with adjusting rods, and the driven wheel is arranged on the adjusting seat.

9. The coal seam mining outburst elimination process of claim 7, wherein: the chain plate type circulating digging cutter is of a triangular structure, two main driving wheels and one driven driving wheel are fixed on three fulcrums of a shaft frame, the two main driving wheels are in transmission connection with the two main driving shafts, the driven driving wheel is located at the far end of the walking platform, a chain plate is sleeved on the main driving wheels and the driven driving wheels, and the main driving wheels and the driven driving wheels are belt wheels or gears.

10. The coal seam mining outburst elimination process of claim 7, wherein: the chain plate type circulating digging cutter spans across the coal seam, the two ends of the chain plate type circulating digging cutter are respectively provided with a walking driving mechanism, and the driven wheels are sleeved on the driving shafts on the corresponding sides.