CN110644923A - Large-diameter spiral drilling equipment and method for coal mine - Google Patents
Large-diameter spiral drilling equipment and method for coal mine Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 85
- 239000003245 coal Substances 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 88
- 230000003287 optical effect Effects 0.000 claims description 10
- 230000002265 prevention Effects 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 238000005520 cutting process Methods 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 230000000087 stabilizing effect Effects 0.000 claims description 5
- 239000004952 Polyamide Substances 0.000 claims description 4
- 238000001746 injection moulding Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
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- 238000005065 mining Methods 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 238000000605 extraction Methods 0.000 description 7
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- 238000004880 explosion Methods 0.000 description 1
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- 238000009434 installation Methods 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/02—Drilling rigs characterised by means for land transport with their own drive, e.g. skid mounting or wheel mounting
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
- E21B19/10—Slips; Spiders ; Catching devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B3/00—Rotary drilling
- E21B3/02—Surface drives for rotary drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
- E21B47/024—Determining slope or direction of devices in the borehole
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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Abstract
The invention relates to the technical field of underground drilling, in particular to large-diameter spiral drilling equipment for a coal mine, wherein a large-diameter spiral drill bit is arranged at the head of a large-diameter spiral drill rod, a directional drill bit is arranged at the head of a directional drill rod, the main body of the large-diameter spiral drill rod is of a tubular structure, the large-diameter spiral drill bit is of an annular structure, the directional drill rod can be connected to the head of the large-diameter spiral drill bit through an adapter, the tails of the large-diameter spiral drill rod and the directional drill rod can be connected to the power output end of a hydraulic rotary driving mechanism, the hydraulic rotary driving mechanism is arranged on a main pushing mechanism, the main pushing mechanism can drive the hydraulic rotary driving mechanism and the large-diameter spiral drill rod and/or the directional drill rod to advance or retract, and a drilling process for preventing a soft coal seam from collapsing can be realized.
Description
Technical Field
The invention relates to the technical field of underground drilling, in particular to a large-diameter spiral drilling technology for a coal mine.
Background
At present, the coal mine safety regulation cancels the arrangement of a tail roadway, most mines are changed into a U-shaped arrangement mode from the original U + L arrangement guideline, and the development of the current mining technology leads the production intensity to be continuously increased, thus causing the hidden trouble that the gas on a stope face and an upper corner exceeds the limit. The underground geological conditions of the coal mine are complex, and the following problems exist when the large-diameter drilling construction is carried out in soft coal seams, tectonic coal and zones with fault fold development:
1. in the drilling process, the inner wall of the hole collapses, and the drilling tool is embraced by rock coal, so that the drilling tool cannot continue to drill;
2. after the drill hole is formed, the drilling tool is drawn out, and the drill hole collapses to form a waste hole; when drilling, people can be injured and killed when gas suddenly gushes out.
The problems are caused, so that the hole forming rate of the underground gas extraction drill hole of the coal mine is lower than 30%, the hole forming depth is low, the hole forming diameter is small, and the extraction action radius is small; the drilling depth is short, so that the drilling extraction period is short. The permeability of the coal bed is low, and the extraction efficiency is reduced.
Although the conventional large auger drilling equipment and method are successfully applied to ground construction, the underground construction environment of the coal mine is more complex compared with the ground construction, so that the conventional large auger drilling equipment and method cannot be used under the coal mine. Firstly, the requirement of the underground coal mine on the size of equipment is extremely strict, and the conventional large spiral drilling equipment has overlarge size and cannot enter an underground construction surface; secondly, a receiving roadway is required to be arranged in the construction of conventional large spiral drilling equipment, and the construction cannot be carried out under a coal mine; thirdly, in the drilling process of the conventional large spiral drilling equipment, sparks are easily generated due to friction between the spiral drill rod and the sleeve, and hidden dangers such as gas explosion are caused.
Disclosure of Invention
In order to solve the problems, the invention provides large-diameter spiral drilling equipment for a coal mine, which can realize a drilling process for preventing collapse of a soft coal seam, and can improve gas extraction efficiency by times by utilizing a formed large-diameter drilling channel. In addition, the invention also provides a large-diameter spiral drilling method for the coal mine.
In order to achieve the purpose, the invention adopts the technical scheme that:
in a first technical scheme, the large-diameter spiral drilling equipment for the coal mine comprises a hydraulic rotary driving mechanism, a main pushing mechanism, a large-diameter spiral drill rod, a large-diameter spiral drill bit, a directional drill bit and a directional drill rod, wherein the large-diameter spiral drill bit is arranged at the head of the large-diameter spiral drill rod, the directional drill bit is arranged at the head of the directional drill rod, the large-diameter spiral drill rod is of a tubular structure, the large-diameter spiral drill bit is of an annular structure, the directional drill rod can be connected to the head of the large-diameter spiral drill bit through an adapter, the tails of the large-diameter spiral drill rod and the directional drill rod can be connected to the power output end of the hydraulic rotary driving mechanism, the hydraulic rotary driving mechanism is arranged on the main pushing mechanism, and the main pushing mechanism can drive the hydraulic rotary driving mechanism and the large-diameter spiral drill;
the large-diameter spiral drilling equipment for the coal mine further comprises a spark-proof sleeve, a spiral blade used for discharging miscellaneous cuttings generated by drilling is arranged outside the large-diameter spiral drill rod, the large-diameter spiral drill and the spiral blade are inserted into the spark-proof sleeve, and the spark-proof sleeve and the large-diameter spiral drill rod can cooperatively advance or retract.
In the first technical means, preferably, the inner diameter of the large-diameter auger rod is matched with the outer diameter of the directional auger rod.
In the first aspect, it is preferable that the large-diameter auger bit is claw-shaped, so that the cutting debris generated by the drilling of the large-diameter auger bit can enter the sparkproof casing through a gap of the large-diameter auger bit.
In the first technical solution, preferably, the main body of the spark-proof sleeve is a steel sleeve, and an inner nest formed by injection molding of a polyamide material is embedded in the inner wall of the steel sleeve.
In the first technical scheme, preferably, the large-diameter spiral drilling equipment for the coal mine further comprises at least one clamp, the clamp is arranged on the traveling path of the spark prevention sleeve, the theme of the clamp is of an annular structure, and rollers for supporting the spark prevention sleeve to move linearly are arranged on the clamp.
In the first aspect, it is preferable that the holder has a height adjusting mechanism for adjusting a position of the height holder; the roller on the clamp is arranged on the clamp subject through a radial adjusting structure so as to adjust the radial position of the roller bearing surface.
In the first technical scheme, as preferred, the directional rod is of a hollow structure, the tail of the directional drill bit is provided with a laser emitter, the main pushing mechanism is provided with a laser receiving target matched with the laser emitter, and the laser receiving target is matched with the laser emitter and used for monitoring the drilling direction of the directional drill bit.
In a first technical scheme, as preferred, main top pushing mechanism is including advancing slide rail, direction optical axis and thrust cylinder, hydraulic pressure changes to drive mechanism slidable and installs on advancing the slide rail, and thrust cylinder's the end that stretches out is connected at hydraulic pressure and is changeed the rear of driving the mechanism, the cover is equipped with direction movable structure on the direction optical axis, and direction movable structure installs and is changeed driving the mechanism with hydraulic pressure and be connected, thrust cylinder can promote hydraulic pressure and change driving mechanism and follow the slide rail rectilinear movement of advancing and by the direction optical axis direction.
In a second aspect, a method of large-diameter auger drilling for coal mines using the large-diameter auger drilling equipment for coal mines as set forth in the first aspect, comprises the steps of:
step 1, stabilizing large-diameter spiral drilling equipment for a coal mine in a dug underground coal mine working roadway;
3, sleeving a large-diameter spiral drill rod and a large-diameter spiral drill bit on the tail part of the directional drill rod by using a hydraulic rotary driving mechanism; the hydraulic rotary driving mechanism drives the large-diameter spiral drill rod and the large-diameter spiral drill bit to drill according to the track of the directional drill rod;
and 4, after pore forming, sequentially pulling out the directional drill rod and the large-diameter spiral drill rod.
The beneficial effects of the invention are as follows:
the directional drill rod is adopted to control the trend of the large-diameter drill hole, and the drill hole track cannot deviate due to a complex coal seam geological environment; a receiving roadway is not required to be independently opened; the drilling mode that the large-diameter auger bit is driven by the large-diameter auger stem to be in the casing can effectively increase the hole diameter of the drilled hole, reduce the torque loss of the hydraulic rotary driving mechanism 1 and increase the gas extraction efficiency; the adoption of the anti-spark sleeve is beneficial to the drilling in the underground high-gas environment; by adopting the casing following construction method, the problem that the hole forming of the soft coal seam is easy to collapse can be effectively solved, and the hole forming rate of the soft coal seam is improved from 30% to 100%.
Drawings
FIG. 1 is a schematic structural diagram of an executive vehicle in the large-diameter spiral drilling equipment for the coal mine.
FIG. 2 is a schematic structural diagram of a large-diameter spiral drilling equipment power vehicle for a coal mine.
FIG. 3 is a schematic view of the drilling installation of the large-diameter spiral drilling equipment for the coal mine.
FIG. 4 is a schematic structural view of a spark-proof casing of the large-diameter screw drilling equipment for a coal mine.
The reference numerals include:
1. a hydraulic rotary driving mechanism; 2. a main pushing mechanism; 21. a traveling slide rail; 22. stabilizing the beam; 23. guiding the optical axis; 24. a laser receiving target; 25. a propulsion cylinder; 3. a holder; 4. a support assembly; 5. a walking chassis; 6. an operation table; 7. a load-sensitive pump; 8. an explosion-proof motor for mining; 9. the explosion-proof soft starter for mining; 10. an oil tank; 11. a large diameter auger stem; 111. a helical blade; 12. a spark-proof sleeve; 121. a steel casing; 122. nesting; 123. a casing joint; 13. a large diameter auger bit; 14. a pilot bit; 141. a laser transmitter; 15. orienting the drill rod; 16. a high-pressure rubber hose.
Detailed Description
In order to make the purpose, technical solution and advantages of the present technical solution more clear, the present technical solution is further described in detail below with reference to specific embodiments. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present teachings.
Example 1
As shown in fig. 1-4, the present embodiment provides a large-diameter auger drilling device for coal mines, which comprises a hydraulic rotary driving mechanism 1, a main jacking mechanism 2, a large-diameter auger stem 11, a large-diameter auger bit 13, a pilot bit 14 and a pilot bit 15, wherein the large-diameter spiral drill bit 13 is arranged at the head of the large-diameter spiral drill rod 11, the directional drill bit 14 is arranged at the head of the directional drill rod 15, the large-diameter spiral drill rod 11 is of a tubular structure, the large-diameter spiral drill bit 13 is of an annular structure, the directional drill rod 15 can be connected to the head of the large-diameter spiral drill bit 13 through an adapter, the tail parts of the large-diameter spiral drill rod 11 and the directional drill rod 15 can be connected to the power output end of the hydraulic rotary driving mechanism 1, the hydraulic rotary driving machine 1 is arranged on the main pushing mechanism 2, the main pushing mechanism 2 can drive the hydraulic rotary driving mechanism 1 and the large-diameter auger stem 11 and/or the directional auger stem 15 to advance or retract.
The large-diameter auger bit 13 is arranged at the head of the large-diameter auger bit 11, the directional drill bit 14 is arranged at the head of the directional drill bit 15, the medium-diameter auger bit 11 and the large-diameter auger bit 13 are of a tubular structure and of an annular structure, the directional drill bit 15 is inserted into the annular structure of the large-diameter auger bit 13, the tail of the large-diameter auger bit 11 is connected to the power output end of the hydraulic rotary driving mechanism 1, the hydraulic rotary driving mechanism 1 can drive the large-diameter auger bit 11 to rotate, the hydraulic rotary driving mechanism 1 is arranged on the main pushing mechanism 2, and the main pushing mechanism 2 can drive the hydraulic rotary driving mechanism 1 and the large-diameter auger bit 11 and the directional drill bit 15 to advance or retreat.
Specifically, the large-diameter spiral drilling equipment for the coal mine is arranged on a power vehicle and comprises an execution vehicle and an auxiliary component, wherein the execution vehicle mainly comprises a main jacking mechanism 2, a walking chassis 5, a hydraulic rotary driving mechanism 1, an operation table 6, a clamp holder 3 and a supporting component 4. The power vehicle mainly comprises a mining explosion-proof motor 8, a load sensitive pump 7, a mining explosion-proof soft starter 9 and an oil tank 10. The auxiliary components mainly comprise a directional drill bit 14, a directional drill rod 15, a large-diameter spiral drill rod 11, a sparkproof sleeve 12, a large-diameter spiral drill bit 13 and a high-pressure rubber hose 16.
In the power vehicle, a walking chassis 5 is in a crawler type, a load sensitive pump 7, a mining explosion-proof motor 8, a mining explosion-proof soft starter 9 and an oil tank 10 are mounted on the chassis, the oil tank 10 drives the walking chassis 5 to move through an engine (not shown in the figure), the mining explosion-proof motor 8 drives an execution vehicle to act through the load sensitive pump 7, and the mining explosion-proof soft starter 9 forms motor control equipment integrating control, soft start, soft stop, light load energy saving and multifunctional protection.
Preferably, the inner diameter of the large diameter auger stem 11 matches the outer diameter of the directional auger stem 15.
The large-diameter spiral drilling equipment for the coal mine further comprises a spark-proof sleeve 12, a spiral blade 111 for discharging miscellaneous cuttings generated by drilling is arranged outside the large-diameter spiral drill rod 11, the large-diameter spiral drill and the spiral blade 111 are inserted into the spark-proof sleeve 12, the spark-proof sleeve 12 can be pushed or retracted in cooperation with the large-diameter spiral drill rod 11, the spark-proof sleeve 12 has the function of preventing the spark generated by the large-diameter spiral drilling equipment, and meanwhile, the spark-proof sleeve 12 is matched with the spiral blade 111 to discharge the miscellaneous cuttings generated by drilling from the drilling.
The large-diameter auger bit 13 is claw-shaped, so that the mixed cuttings generated by drilling of the large-diameter auger bit 13 can enter the spark-proof casing 12 through the gap of the large-diameter auger bit 13, and the large-diameter auger bit 13 can leak through the drilled holes for mixed cuttings.
Preferably, the main body of the spark-proof sleeve 12 is a steel sleeve 121, and an inner nest 122 which is made of polyamide material and is formed by injection molding is embedded in the inner wall of the steel sleeve 121.
The large-diameter spiral drilling equipment for the coal mine further comprises at least one clamp holder 3, the clamp holder 3 is arranged on a traveling path of the spark prevention sleeve 12, the theme of the clamp holder 3 is of an annular structure, a roller used for supporting the linear movement of the spark prevention sleeve 12 is arranged on the clamp holder 3, the roller plays a role in supporting the middle of the main body of the spark prevention sleeve 12, and the phenomenon that the spark prevention sleeve 12 is deviated due to self gravity when the movement direction of the large-diameter spiral drill rod 11 or the spark prevention sleeve 12 is caused by self weight is avoided.
The gripper 3 has a height adjusting mechanism for adjusting the position of the height gripper 3; the rollers on the clamper 3 are installed on the clamper 3 subject by a radial adjusting structure to adjust the radial position of the roller bearing surface, so that the clamper 3 can adjust the supporting angle and position.
The directional rod is of a hollow structure, the tail of the directional drill bit 14 is provided with a laser emitter 141, the main pushing mechanism 2 is provided with a laser receiving target 24 matched with the laser emitter 141, and the laser receiving target 24 and the laser emitter 141 are matched for monitoring the drilling direction of the directional drill bit 14.
The main pushing mechanism 2 comprises a traveling slide rail 21, a guide optical axis 23 and a propelling oil cylinder 25, the hydraulic rotary driving mechanism 1 is slidably mounted on the traveling slide rail 21, the extending end of the propelling oil cylinder 25 is connected to the rear of the hydraulic rotary driving mechanism 1, a guide movable structure is sleeved on the guide optical axis 23 and is mounted and connected with the hydraulic rotary driving mechanism 1, and the propelling oil cylinder 25 can push the hydraulic rotary driving mechanism 1 to linearly move along the traveling slide rail 21 and be guided by the guide optical axis 23.
Generally speaking, the equipment is used in the following process, according to design requirements, the large-diameter spiral drilling equipment for coal mines is arranged and supported on a working face, the hydraulic rotary driving mechanism 1 is matched with the holder 3 to drive the directional drill rod 15 to synchronously rotate the directional drill bit 14, and a guide hole which is in accordance with a design route is drilled. After pore-forming, the hydraulic rotary drive mechanism 1 and the holder 3 are mutually matched, and the large-diameter auger stem 11 and the large-diameter auger bit 13 are sleeved on the outer wall of the directional auger stem 15; the hydraulic rotary driving mechanism 1 drives the large-diameter spiral drill rod 11 and the large-diameter spiral drill bit 13 to drill according to the track of the directional drill rod 15; after the large-diameter hole is formed, the directional drill rod 15 and the large-diameter spiral drill rod 11 are sequentially pulled out.
In other parts, the executive vehicle and the power vehicle are connected by a high-pressure rubber pipe 16 to realize power transmission of a hydraulic driving system. The hydraulic rotary driving mechanism 1 is a main shaft through hole type, and a guide hole which is in accordance with a designed line is drilled through a directional drill bit 14 which clamps a directional drill rod 15 and synchronously rotates. The large-diameter auger stem 11 and the large-diameter auger bit 13 are hollow inside. The spark-proof casing pipe 12 is characterized in that an inner nesting sleeve 122 which is made of polyamide materials through injection molding is embedded in a steel casing pipe 121, so that sparks generated by friction between the large-diameter auger stem 11 and the casing pipe are prevented, and adjacent spark-proof casing pipes 12 are connected through casing pipe joints 123. The dregs generated by drilling are led out by the large-diameter auger stem 11 by the helical blade 111. The main pushing mechanism 2 is provided with a laser receiving target 24 for displaying the accuracy of the drilling position, and a laser transmitter 141 is provided inside the pilot drill 14.
Example 2
A large-diameter auger drilling method for coal mines using the large-diameter auger drilling equipment for coal mines as in example 1, comprising the steps of:
step 1, stabilizing large-diameter spiral drilling equipment for a coal mine in a dug underground coal mine working roadway (no receiving roadway on the opposite side);
and 4, after pore forming, pulling out the directional drill rod 15 and the large-diameter spiral drill rod 11 in sequence.
In combination with the large diameter auger drilling apparatus for coal mine of example 1, the method of use of the apparatus comprises the following steps
Firstly, the equipment is driven by a control operation platform 6 to drive a walking chassis 5 to be driven to a proper position, namely, in a dug underground coal mine working roadway, and then the mobile vehicle is stably supported on the ground and the surface to be drilled through a supporting component 4.
Then the operation table 6 drives the mining explosion-proof motor 8 and the load sensitive pump 7 to be matched, so that the hydraulic rotary driving mechanism 1 drives the directional drill rod 15 to rotate, the main pushing mechanism 2 pushes the hydraulic rotary driving mechanism 1 to eject forwards, in the process, the hydraulic rotary driving mechanism 1 moves along the traveling slide rail 21, the middle part and the front part of the traveling slide rail 21 are supported on the front part of the traveling chassis 5 by the stabilizing beam 22, the main pushing mechanism 2 continuously pushes the directional drill rod 15 and the directional drill bit 14 to a proper depth in a hole to be drilled, in the process, the main pushing mechanism 2 is firstly connected with the tail part of the directional drill rod 15, the first section of the directional drill rod 15 with the directional drill bit 14 is pushed into the coal wall, then the hydraulic rotary driving mechanism 1 and the tail part of the directional drill rod 15 are separated, the main pushing mechanism 2 drives the hydraulic rotary driving mechanism 1 to retract, and then the tail part of the other directional drill rod 15 is connected to the hydraulic rotary driving, the head part of the main pushing mechanism 2 is connected with the tail part of the directional drill rod 15 which is pushed into the coal wall, the main pushing mechanism 2 drives the hydraulic driving mechanism 1 to push, the second section of the directional drill rod 15 is pushed into the coal wall at the top part, and the operation is repeated in this way, and in the process, the laser transmitter 141 and the laser receiving target 24 are matched to measure the drilling depth and the drilling angle.
After the directional drill rod 15 is pushed to a proper depth, the main pushing mechanism 2 drives the hydraulic rotary driving mechanism 1 to return, the large-diameter spiral drill rod 11 is connected to the hydraulic rotary driving mechanism 1, the head of the large-diameter spiral drill rod 11 is connected to the tail of the last directional drill rod 15 through the switching device, then the main pushing mechanism 2 drives the hydraulic rotary driving mechanism 1 to push, the large-diameter spiral drill rod 11 and the spark-proof casing pipe are pushed into the coal wall simultaneously, and similar to the pushing of the directional drill rod 15 into the coal wall, the large-diameter spiral drill rods 11 are pushed into the coal wall one by one in sections. The large diameter auger stem 11 is advanced in the direction of extension of the directional auger stem 15 until it is pushed to the proper depth, creating the effect shown in figure 3. And finally, the large-diameter spiral drill rod 11 and the large-diameter spiral drill bit 13, and the directional drill rod 15 and the directional drill bit 14 are sequentially pulled out through the main pushing mechanism 2, so that the drilling is completed.
The directional drilling rod 15 is adopted to control the trend of the large-diameter drilling hole, and the drilling track cannot deviate due to a complex coal seam geological environment; a receiving roadway recovery drilling tool is not required to be independently opened; the drilling mode that the large-diameter auger bit 13 is driven by the large-diameter auger stem 11 to be drilled in the casing can effectively increase the hole diameter of a drilled hole, reduce the torque loss of the hydraulic rotary driving mechanism 1 of the drill 1 and increase the gas extraction efficiency; the adoption of the spark-proof sleeve 12 is beneficial to the drilling in the underground high-gas environment; by adopting the casing following construction method, the problem that the hole forming of the soft coal seam is easy to collapse can be effectively solved, and the hole forming rate of the soft coal seam is improved from 30% to 100%.
The foregoing is only a preferred embodiment of the present invention, and many variations in the specific embodiments and applications of the invention may be made by those skilled in the art without departing from the spirit of the invention, which falls within the scope of the claims of this patent.
Claims (9)
1. The utility model provides a major diameter auger drilling is equipped for coal mine which characterized in that: the large-diameter auger bit is arranged at the head of the large-diameter auger stem, the directional drill bit is arranged at the head of the directional drill stem, the large-diameter auger stem is of a tubular structure, the large-diameter auger bit is of an annular structure, the directional drill stem can be connected to the head of the large-diameter auger bit through an adapter, the tails of the large-diameter auger stem and the directional drill stem can be connected to the power output end of the hydraulic rotary driving mechanism, the hydraulic rotary driving mechanism is arranged on the main pushing mechanism, and the main pushing mechanism can drive the hydraulic rotary driving mechanism and the large-diameter auger stem and/or the directional drill stem to advance or retract;
the large-diameter spiral drilling equipment for the coal mine further comprises a spark-proof sleeve, a spiral blade used for discharging miscellaneous cuttings generated by drilling is arranged outside the large-diameter spiral drill rod, the large-diameter spiral drill and the spiral blade are inserted into the spark-proof sleeve, and the spark-proof sleeve and the large-diameter spiral drill rod can cooperatively advance or retract.
2. The large-diameter auger drilling equipment for coal mines as set forth in claim 1, wherein: the inner diameter of the large-diameter spiral drill rod is matched with the outer diameter of the directional drill rod.
3. The large-diameter auger drilling equipment for coal mines as set forth in claim 1, wherein: the large-diameter spiral drill bit is claw-shaped, so that the miscellaneous cuttings generated by the drilling of the large-diameter spiral drill bit can enter the sparkproof casing through the gap of the large-diameter spiral drill bit.
4. The large-diameter auger drilling equipment for coal mines as set forth in claim 1, wherein: the main body of the anti-spark sleeve is a steel sleeve, and an inner nest formed by injection molding of a polyamide material is embedded in the inner wall of the steel sleeve.
5. The large-diameter auger drilling equipment for coal mines as set forth in claim 1, wherein: the large-diameter spiral drilling equipment for the coal mine further comprises at least one clamp holder, the clamp holder is arranged on the traveling path of the spark prevention sleeve, the theme of the clamp holder is of an annular structure, and the clamp holder is provided with a roller for supporting the spark prevention sleeve to move linearly.
6. The large-diameter auger drilling equipment for coal mines as set forth in claim 5, wherein: the gripper has a height adjustment mechanism for adjusting the position of the height gripper; the roller on the clamp holder is arranged on the clamp holder main body through a radial adjusting structure so as to adjust the radial position of the roller bearing surface.
7. The large-diameter auger drilling equipment for coal mines as set forth in claim 1, wherein: the directional rod is of a hollow structure, a laser emitter is arranged at the tail of the directional drill bit, a laser receiving target matched with the laser emitter is arranged on the main pushing mechanism, and the laser receiving target and the laser emitter are matched to monitor whether the drilling direction of the directional drill bit deviates or not.
8. The large-diameter auger drilling equipment for coal mines as set forth in claim 1, wherein: the main push mechanism comprises an advancing slide rail, a guide optical axis and a propulsion oil cylinder, the hydraulic rotary drive mechanism is slidably mounted on the advancing slide rail, the extending end of the propulsion oil cylinder is connected to the rear of the hydraulic rotary drive mechanism, a guide movable structure is sleeved on the guide optical axis and mounted on the hydraulic rotary drive mechanism, and the propulsion oil cylinder can push the hydraulic rotary drive mechanism to linearly move along the advancing slide rail and be guided by the guide optical axis.
9. A large-diameter auger drilling method for coal mines using the large-diameter auger drilling equipment for coal mines according to any one of claims 1 to 8, comprising the steps of:
step 1, stabilizing large-diameter spiral drilling equipment for a coal mine in a dug underground coal mine working roadway;
step 2, clamping the directional drill rod by the hydraulic rotary driving mechanism to synchronously rotate the directional drill bit, and drilling a guide hole which accords with a designed line;
3, sleeving a large-diameter spiral drill rod and a large-diameter spiral drill bit on the tail part of the directional drill rod by using a hydraulic rotary driving mechanism; the hydraulic rotary driving mechanism drives the large-diameter spiral drill rod and the large-diameter spiral drill bit to drill according to the track of the directional drill rod;
and 4, after pore forming, sequentially pulling out the directional drill rod and the large-diameter spiral drill rod.
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Inventor after: Li Yanfu Inventor after: Liu Xiaoju Inventor after: Bai Xue Inventor after: Wang Wenxue Inventor after: Liu Yu Inventor after: Meng Xiangjun Inventor after: Li Baocun Inventor after: Tai Weiwei Inventor after: Wang Gang Inventor after: Chen Cheng Inventor after: Wang Guohui Inventor before: Li Yanfu Inventor before: Liu Xiaoju Inventor before: Bai Xue Inventor before: Wang Wenxue Inventor before: Liu Yu Inventor before: Meng Xiangjun Inventor before: Li Baocun Inventor before: Tai Weiwei Inventor before: Wang Gang Inventor before: Chen Pin Inventor before: Wang Guohui |