CN110080813B - Roof cutting and side protecting device and method - Google Patents
Roof cutting and side protecting device and method Download PDFInfo
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- CN110080813B CN110080813B CN201910376444.8A CN201910376444A CN110080813B CN 110080813 B CN110080813 B CN 110080813B CN 201910376444 A CN201910376444 A CN 201910376444A CN 110080813 B CN110080813 B CN 110080813B
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 230000008093 supporting effect Effects 0.000 claims abstract description 37
- 239000010878 waste rock Substances 0.000 claims abstract description 16
- 230000000903 blocking effect Effects 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims description 20
- 229910000831 Steel Inorganic materials 0.000 claims description 15
- 239000010959 steel Substances 0.000 claims description 15
- 239000011435 rock Substances 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 9
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 239000002699 waste material Substances 0.000 claims description 4
- 230000001012 protector Effects 0.000 claims 1
- 239000003245 coal Substances 0.000 description 19
- 238000005065 mining Methods 0.000 description 10
- 238000005516 engineering process Methods 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/0086—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor in galleries
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
- E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
A top cutting and side protecting device and a top cutting and side protecting method using the device are provided, the top cutting and side protecting device comprises a base, a top beam and at least two upright columns, the upper ends of the upright columns are hinged with the top beam, the lower ends of the upright columns are fixedly connected with the base, and the upright columns are telescopically supported between the base and the top beam; the base is provided with at least one lower hydraulic side pushing support rod, one end of the lower hydraulic side pushing support rod is connected with the base, and the lower hydraulic side pushing support rod is used for supporting the lower part of the vertical waste rock blocking structure on one side of the roadway cutting joint; the top beam is provided with two upper hydraulic side pushing support rods, and the upper hydraulic side pushing support rods are used for supporting the upper portion of the vertical gangue blocking structure on one side of the roadway forming joint seam.
Description
Technical Field
The invention relates to coal mine roadway supporting equipment and a coal mine roadway supporting method, in particular to a coal-pillar-free roadway roof-cutting side wall protecting device and a roof-cutting side wall protecting method using the device.
Background
Coal is taken as the prop energy of China, and the yield and the consumption of the coal are the first in the world all the year around the 20 th century and the 80 th era. Meanwhile, coal plays an important role in the fields of maintaining the international energy pattern, guaranteeing the energy safety of China, supporting the healthy development of national economy, maintaining social stability, developing strategic emerging industries and the like.
For a long time, the coal mine in China always adopts a mining mode of stoping one working face, reserving a roadway protection coal pillar and tunneling at least two crossheading roadways in advance, the coal mining mode greatly increases the tunneling engineering quantity and the mining cost of the coal mining roadway, the preparation of one working face usually needs to tunnel the roadway 1-2 years in advance, and the continuation of the coal mining working face is influenced to a great extent. Meanwhile, the mining mode is easy to generate dynamic disaster phenomena such as rock burst, rock burst and rock burst, and the like, is difficult to control large deformation, large rock burst and the like generated by surrounding rocks of a roadway especially for a deep mine, and is easier to generate safety accidents of the roadway. In addition, the reserved roadway-protecting coal pillars are difficult to extract under the mine, and serious waste is caused to national coal resources.
Since the 50 s of the 20 th century, the research and application of gob-side entry retaining technology in China began to make the pillar-free mining technology possible, greatly improve the recovery rate of coal resources and reduce the roadway excavation amount. However, the conventional gob-side entry retaining technology usually adopts a filling mode of gangue, soft mold concrete, high-water-content quick-setting materials and the like to form a supporting wall for supporting, so that the engineering quantity is large, the supporting cost is high, and the supporting structure is deformed greatly or fails due to large stress concentration.
In the beginning of the 21 st century, with the proposition of the theory of the roof-cutting short-arm beam, roof-cutting pressure-relief coal-pillar-free roadway-forming mining technology is gradually developed, and a 110 construction method that only one crossheading roadway needs to be tunneled in advance and a coal pillar does not need to be reserved on one working face for stoping and an N00 construction method that the crossheading roadway does not need to be tunneled in advance and a coal pillar for roadway protection does not need to be reserved on the whole panel for stoping are successively formed.
For the non-coal-pillar self-entry mining technology, at present, a top cutting and side protection mode is mainly adopted for carrying out vertical support and lateral support on dense single hydraulic pillars, and the top cutting and side protection mode needs a large number of single hydraulic pillars, so that the workload is huge, and the support effect is poor. The 'roadside waste rock retaining support technology in 110 construction method and control strategy research thereof' published in 2016 of coal mine support discloses a four-column waste rock retaining support of coal pillar-free self-entry mining technology, the waste rock retaining support is provided with a waste rock retaining plate with the approximate height to a roadway for laterally supporting goaf caving waste rock, the support effect of the area near the waste rock retaining support is better, but the volume is larger, and according to the structure and the layout, only one support is allowed to support in the whole roadway, the effective support distance is limited, and roof cutting and side protection are still carried out by adopting a dense single support column mode outside the effective support distance.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information constituting prior art that is known to a person of ordinary skill in the art.
Disclosure of Invention
Aiming at the problems that the top-cutting side-protecting mode in the prior art needs a large number of hydraulic single pillars, the workload is huge, the supporting effect is poor and the like, the disclosure mainly aims to provide a top-cutting side-protecting device and method which are simple in structure, convenient to operate and capable of being recycled.
A cut top and protect group's device, cut top and protect group's device includes base, back timber and stand: the number of the upright columns is at least two, the upper ends of the upright columns are hinged with the top beam, the lower ends of the upright columns are fixedly connected with the base, and the upright columns are telescopically supported between the base and the top beam; the base is provided with at least one lower hydraulic side pushing support rod, one end of the lower hydraulic side pushing support rod is connected with the base, and the lower hydraulic side pushing support rod is used for supporting the lower part of the vertical waste rock blocking structure on one side of the roadway cutting joint; the top beam is provided with two upper hydraulic side pushing support rods, and the upper hydraulic side pushing support rods are used for supporting the upper portion of the vertical gangue blocking structure on one side of the roadway forming joint seam.
According to one embodiment of the invention, the number of the lower hydraulic side push support rods is two, the two lower hydraulic side push support rods are arranged along the axial direction of the roadway,
according to an embodiment of the invention, the movable ends of the two lower hydraulic side push supporting rods are connected with a lower side push cross beam, and the extension direction of the lower side push cross beam is parallel to the axial direction of the roadway.
According to one embodiment of the invention, the number of the upper hydraulic side push supporting rods is two, the two upper hydraulic side push supporting rods are arranged along the axial direction of the roadway,
according to an embodiment of the invention, the movable ends of the two upper hydraulic side push supporting rods are connected with an upper side push cross beam, and the extension direction of the upper side push cross beam is parallel to the axial direction of the roadway.
According to an embodiment of the invention, at least two columns are arranged in a direction parallel to the axial direction of the roadway or perpendicular to the axial direction of the roadway.
According to an embodiment of the invention, the two upright columns are hydraulic cylinders, the middle parts of the column bodies of the two upright columns are provided with a liquid injection valve and a pressure relief valve, when the hydraulic pressure in the upright columns exceeds a set pressure, the pressure relief valve can be automatically opened to relieve the pressure of the upright columns, and when the pressure in the upright columns is reduced to be lower than the set pressure, the pressure relief valve is automatically closed to keep the relatively constant pressure of the upright columns.
According to an embodiment of the present invention, an upright fixing sleeve is further disposed between at least two of the uprights, and is respectively sleeved on each upright to reinforce the connection with the base.
On the other hand, the embodiment of the invention provides a coal-pillar-free self-entry roof-cutting and side-protecting method, which comprises the following steps:
(1) hanging a metal net in the vertical direction of the joint cutting side in the roadway, and erecting U-shaped steel in the vertical direction to enable the U-shaped steel to be tightly attached to the metal net;
(2) the top cutting and side protecting device is arranged on the joint cutting side in the roadway, so that the upright post rises and is tightly attached to the surface of the roadway top plate, and the pressurization is stopped after the upright post reaches the pressure meeting the requirement of the initial supporting force;
(3) injecting liquid into the upper side pushing support rod and the lower side pushing support rod to extend out, so that the movable ends of the upper side pushing support rod and the lower side pushing support rod are tightly attached to the gangue stopping U-shaped steel;
(4) when the working face is pushed for a certain distance, part of roof rocks in the goaf automatically collapse along the cutting seam under the action of mine pressure and strong support of the top cutting and side protecting device and fill the goaf, and collapsed waste rocks are kept stable under the blocking action of the metal mesh and the waste rock blocking U-shaped steel and cannot bulge out of the roadway;
(5) when the laneway is stable, the roof cutting and side protecting device is gradually removed so as to be recycled.
According to one embodiment of the invention, the two upright columns are hydraulic cylinders, and the middle parts of the column bodies of the two upright columns are provided with a liquid injection valve and a pressure relief valve; when the roadway top plate sinks and deforms greatly to increase the pressure of the emulsified liquid in the stand column to the rated pressure, the pressure release valve is automatically opened and starts to release the pressure, and when the pressure of the emulsified liquid in the stand column drops below the rated pressure, the pressure release valve is automatically closed immediately to keep the emulsified liquid in the stand column to have relatively constant pressure.
According to the technical scheme, the non-pillar self-entry roof-cutting and side-protecting device and the method have the advantages and positive effects that: the roof cutting and side protecting device is simple in structure, convenient to operate, recyclable, high in adaptability to the height of a roadway and the inclination angle of a roadway top plate, and free of influence of coal face extraction.
Drawings
Various objects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:
FIG. 1 is a schematic front view of a first embodiment of the present invention;
FIG. 2 is a schematic side view of the first embodiment of the present invention;
FIG. 3 is a schematic front view of a second embodiment of the present invention;
FIG. 4 is a schematic view of an upper side thrust beam structure according to a second embodiment of the present invention;
description of reference numerals:
1-a base; 2-top beam; 3-upright column; 4-upper side pushing beam; 5-pushing the beam laterally at the lower part; 6-pushing the supporting rod laterally at the upper part; 7-pushing the support rod laterally at the lower part; 8-upright post connecting sleeve; 9-a liquid injection valve; 10-a pressure relief valve; 11-lifting a ring; 12-lifting lug plates of a forklift; 13-top beam anti-slip band; 14-upper side push beam anti-skid band.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their detailed description will be omitted.
Referring to fig. 1 and 2, the coal-pillar-free top-cutting and side-protecting device for roadway self-entry mainly comprises a base 1, a top beam 2 and an upright post 3, wherein the base 1 and the top beam 2 are of an integral rigid structure, a top beam anti-slip belt 13 is arranged on the upper surface of the top beam 2, the top beam 2 and a roadway top plate can be effectively prevented from sliding, and the upright post 3 is of a hydraulic telescopic structure and is a main vertical force transmission structure.
According to the first embodiment of the present invention, at least two upright columns 3 are included, the upper ends of the upright columns 3 are hinged to the top beam 2, the lower ends of the upright columns 3 are fixedly connected to the base 1, and the upright columns 3 are reinforced to the base 1 by the upright column fixing sleeves 8, so as to improve the stability of the upright columns 3.
According to the first embodiment of the present invention, two lower side push supporting rods 7 are optionally provided on one side of the base 1, the arrangement direction of the two vertical columns 3 can be considered as being parallel to the roadway axis (this is schematically illustrated after the basic arrangement), the extension direction of the side push supporting rods 7 can be selected as being perpendicular to the arrangement direction of the two vertical columns 3 (as shown in fig. 2), and the side push supporting rods 7 can be optionally horizontally arranged or nearly horizontally arranged. The side-push supporting rod 7 is hinged and fixed with the base 1. The lateral thrust support bar 7 may alternatively be a hydraulic cylinder.
One end of a lower side push support rod 7 is fixed on the base 1, the other movable end of the lower side push support rod is connected with a lower side push cross beam 5 to provide side push force for the lower side push cross beam 5, the arrangement direction of the two lower side push support rods 7 is the same as the arrangement direction of the two stand columns 3, namely approximately along the axis direction of a roadway, the extension direction of the long edge of the lower side push cross beam 5 is parallel to the arrangement direction of the two stand columns 3, and the lower side push cross beam 5 is used for supporting the lower parts of vertical waste rock blocking structures such as telescopic U-shaped steel; in one embodiment, the cylinder diameters of the two lower side push support rods 7 are 63mm, the rod diameters are 45mm, the strokes are 960mm, a side push force of 98kN can be provided, a side pull force of 48kN can be provided, and the working resistance is 109 kN.
According to the first embodiment of the invention, two upper side push support rods 6 are arranged on one side edge of the top beam 2, the arrangement direction of the two upright posts 3 can be considered to be parallel to the roadway axis, the extension direction of the upper side push support rods 6 is perpendicular to the arrangement direction of the two upright posts 3 (as shown in fig. 2), one end of each upper side push support rod 6 is fixed on the top beam 2, the other end of each upper side push support rod 6 is connected with an upper side push cross beam 4 to provide side push force for the upper side push cross beam 4, the arrangement direction of the two upper side push support rods 6 is the same as the arrangement direction of the two upright posts 3, namely approximately along the roadway axis direction, the extension direction of the long side of the upper side push cross beam 4 is the same as the arrangement direction of the two upright posts 3, and the upper side push cross beam 4 is used for supporting the upper parts of vertical waste rock blocking structures such as telescopic U-shaped steel; in one embodiment, the two upper side push support rods 7 have a cylinder diameter of 63mm, a rod diameter of 45mm, a stroke of 960mm, a side push force of 98kN, a side pull force of 48kN and a working resistance of 109 kN.
According to the first embodiment of the invention, the upright post 3 is of a double telescopic type, the inner and outer cylinder diameters of the upright post 3 are respectively 180mm and 250mm, the inner and outer diameters of the upright post 3 are respectively 160mm and 235mm, the initial supporting force is 1545kN, and the working resistance is 2000 kN.
According to the first embodiment of the invention, the rising height difference of the two upright columns 3 can be adjusted to enable the top beam 2 to generate a 15-degree swing angle (relative to the horizontal plane) along the arrangement direction of the two upright columns 3, and when the roadway roof is partially inclined by not more than 15 degrees along the axial direction of the roadway, the top beam 2 can be tightly contacted with the roadway roof by adjusting the swing angle of the top beam 2; when the roadway top plate is partially inclined by more than 15 degrees along the axial direction of the roadway, the top beam 2 can be in close contact with the roadway top plate by adding cushion layers such as sleepers on the lower side of the top beam 2.
According to the first embodiment of the invention, the top beam 2 can generate a 5-degree swing angle along the direction vertical to the arrangement direction of the two upright columns 3, and the swing angle is controlled by the gap between the stud pin shafts of the two upright columns 3 and the stud pin holes of the two upright columns 3.
According to the first embodiment of the invention, the middle parts of the column bodies of the two upright columns 3 are provided with the liquid injection valve 9 and the pressure relief valve 10, when the hydraulic pressure in the upright columns 3 exceeds the set pressure, the pressure relief valve 10 can be automatically opened to relieve the pressure of the upright columns 3, and when the pressure in the upright columns 3 is reduced to be lower than the set pressure, the pressure relief valve 10 is automatically closed to keep the pressure of the upright columns 3 relatively constant.
According to the first embodiment of the invention, the power, the action source and the realization of the pillar-free roof-cutting and side-protecting device for self-entry roadway are all completed by a hydraulic system.
Fig. 3 shows a second embodiment, which differs from the first embodiment mainly in that a lower side push support bar 7 is arranged on a side of the base 1 perpendicular to the arrangement direction of the two uprights 3, and an upper side push support bar 6 is arranged on a side of the roof rail 2 perpendicular to the arrangement direction of the two uprights 3. That is, in this embodiment, the lower side push supporting rod 7 and the upper side push supporting rod 6 are substantially parallel to the arrangement direction of the two vertical columns 3, and the arrangement direction of the two vertical columns 3 can be selected to be perpendicular to the roadway axis.
Therefore, the top cutting and side protecting device can be suitable for the roadway with the top plate having a larger inclination angle. Wherein, an independent hydraulic system is arranged between the two upright posts 3, and the two upright posts can be relatively independently stretched up and down. As shown in fig. 1, the side column 3 is high and the other side column 3 is low, so that the side drift can be supported by the inclined roof and pushed laterally.
It can be understood that the side pushing beams in the above two embodiments should face the side of the roadway to facilitate side pushing of the side entry retaining. The top-cutting side-protecting devices with the structures of the two embodiments can be flexibly selected according to requirements, the first embodiment can be selected at the position where the lane is reserved with other equipment occupying space, so that two stand columns are parallel to the lane side and do not occupy space, the top-cutting side-protecting devices of the second embodiment can be arranged at intervals, the arrangement direction of the two stand columns of the top-cutting side-protecting devices is perpendicular to the side face of the lane side, a certain top beam and/or bottom beam inclination angle can be preset, more powerful support can be provided for the side face of the lane side, and deformation can be prevented.
The top cutting and side protecting devices of the two embodiments can be arranged aiming at top plates or bottom plates inclined in different directions due to the fact that hydraulic pressure of the upright columns can be adjusted independently, arrangement is not limited by terrain conditions, and customization is not needed.
Fig. 4 shows a structural schematic diagram of the upper side pushing beam 4 according to two embodiments of the invention, and an upper side pushing beam anti-slip belt 14 is arranged on the outer surface of the upper side pushing beam 4, so that the upper side pushing beam and a vertical waste rock blocking structure such as a telescopic U-shaped steel can be effectively prevented from slipping. It should be noted that the lower side thrust cross member 5 of the two embodiments also has the same structure, which is not shown in this embodiment.
The method of using the cut top and side wall apparatus of the present invention will now be described in detail with reference to fig. 1-4, including:
(1) hanging a metal net in the vertical direction of the joint cutting side in the roadway, and erecting U-shaped steel in the vertical direction to enable the U-shaped steel to be tightly attached to the metal net;
(2) a top cutting and side protecting device is arranged on the cutting joint side in the roadway, high-pressure emulsion is injected from a liquid injection valve through a control valve, the upright post 3 is lifted and clings to the surface of the roadway top plate, the high-pressure emulsion is continuously injected from a liquid injection valve 9, the pressure of the emulsion in the upright post 3 is raised, and the pressurization is stopped when the pressure meets the requirement of the initial supporting force;
(3) injecting liquid into the upper side push supporting rod 6 and the lower side push supporting rod 7, so that the upper side push supporting rod 6 and the lower side push supporting rod 7 respectively push the upper side push cross beam 4 and the lower side push cross beam 5 to be tightly attached to the gangue stopping U-shaped steel;
(4) after the working face is pushed for a certain distance, part of roof rocks in the goaf automatically collapse along a joint seam under the action of mine pressure and strong support of the roof cutting and side protecting device and fill the goaf, and collapsed waste rocks are kept stable under the blocking action of a metal mesh, waste rock blocking U-shaped steel, the upper side push cross beam 4 and the lower side push cross beam 5 so as not to bulge out of a roadway;
(5) when the tunnel top plate sinks and deforms greatly to cause the pressure of the emulsified liquid in the upright post 3 to increase to the rated pressure, the pressure release valve automatically opens and starts to release the pressure, and when the pressure of the emulsified liquid in the upright post 3 drops below the rated pressure, the pressure release valve automatically closes immediately to keep the emulsified liquid in the upright post 3 to have relatively constant pressure;
(6) when the laneway is stable, the roof cutting and side protecting device is gradually removed so as to be recycled.
According to the technical scheme, the non-pillar self-entry roof-cutting and side-protecting device and the method have the advantages and positive effects that: the roof cutting and side protecting device is simple in structure, convenient to operate, capable of applying high initial supporting force, capable of being recycled, high in adaptability to the height of a roadway and the inclination angle of a roadway top plate and free of influence of coal face extraction.
Although the present invention has been disclosed with reference to certain embodiments, numerous variations and modifications may be made to the described embodiments without departing from the scope and ambit of the present invention. It is to be understood, therefore, that this invention is not limited to the particular embodiments disclosed, but it is intended to cover modifications within the scope of the appended claims and their equivalents.
Claims (9)
1. The top cutting side protection device is characterized by comprising a base, a top beam and a stand column:
the number of the upright columns is at least two, the upper ends of the upright columns are hinged with the top beam, the lower ends of the upright columns are fixedly connected with the base, and the upright columns are telescopically supported between the base and the top beam; an independent hydraulic system is arranged between at least two upright columns, and the at least two upright columns stretch up and down relatively and independently; the upright post is a hydraulic cylinder, the middle part of the body of the upright post is provided with a liquid injection valve and a pressure relief valve, when the hydraulic pressure in the upright post exceeds a set pressure, the pressure relief valve can be automatically opened to relieve the pressure of the upright post, and when the pressure in the upright post is reduced to be lower than the set pressure, the pressure relief valve is automatically closed to keep the upright post at a relatively constant pressure;
the base is provided with at least one lower hydraulic side pushing support rod, one end of the lower hydraulic side pushing support rod is connected with the base, the other end of the lower hydraulic side pushing support rod is a movable end, the movable end is connected with a lower side pushing cross beam, and the lower side pushing cross beam is used as the lower part of a vertical waste rock blocking structure at one side of the roadway forming joint cutting; the top beam is provided with two upper hydraulic side pushing support rods, the upper hydraulic side pushing support rods are connected with an upper side pushing cross beam, and the upper side pushing cross beam is used as the upper part of the vertical waste rock blocking structure at one side of the self-lane-forming joint cutting;
the lower side push supporting rod is arranged on one side of the base, which is perpendicular to the arrangement direction of the two upright columns, and the upper side push supporting rod is arranged on one side of the top beam, which is perpendicular to the arrangement direction of the two upright columns.
2. The cut top and side wall protecting device according to claim 1, wherein there are two lower hydraulic side push support rods, and the two lower hydraulic side push support rods are arranged along the axial direction of the roadway.
3. The cut top side protection device according to claim 2, wherein the movable ends of the two lower hydraulic side push support rods are respectively connected with one lower side push cross beam, and the extension direction of the lower side push cross beam is parallel to the axial direction of the roadway.
4. The cut top side wall unit according to claim 1, wherein the two upper hydraulic side push support bars are arranged axially along the roadway.
5. The cut top side protection device according to claim 4, wherein each of the two upper hydraulic side push support rods is connected with an upper side push cross beam through a movable end, and the extension direction of the upper side push cross beam is parallel to the axial direction of the roadway.
6. The cut top side protection device according to claim 1, wherein at least two of the columns are arranged in a direction parallel to a roadway axial direction or perpendicular to the roadway axial direction.
7. The top-cutting wall protector according to any one of claims 1 to 6, wherein a column fixing sleeve is further provided between at least two columns to respectively sleeve each column to reinforce the connection with the base.
8. A coal-pillar-free self-entry roof-cutting and side-protecting method comprises the following steps:
(1) hanging a metal net in the vertical direction of the joint cutting side in the roadway, and erecting U-shaped steel in the vertical direction to enable the U-shaped steel to be tightly attached to the metal net;
(2) installing the roof cutting and side protecting device according to any one of claims 1 to 7 on the cutting side in the roadway, so that the upright column rises and clings to the surface of the roadway roof, and stopping pressurizing after the upright column reaches the pressure meeting the requirement of initial supporting force;
(3) injecting liquid into the upper side pushing support rod and the lower side pushing support rod to extend the upper side pushing support rod and the lower side pushing support rod, so that the movable ends of the upper side pushing support rod and the lower side pushing support rod are tightly attached to the gangue stopping U-shaped steel;
(4) when the working face is pushed for a certain distance, part of roof rocks in the goaf automatically collapse along the cutting seam under the action of mine pressure and strong support of the top cutting and side protecting device and fill the goaf, and collapsed waste rocks are kept stable under the blocking action of the metal mesh and the waste rock blocking U-shaped steel and cannot bulge out of the roadway;
(5) and after the roadway is stabilized, gradually removing the top cutting and side protecting device so as to enable the top cutting and side protecting device to be recycled.
9. The top-cutting side protection method according to claim 8, wherein the upright is a hydraulic cylinder, and a liquid injection valve and a pressure relief valve are arranged in the middle of the body of the upright; when the tunnel top plate sinks and deforms greatly to cause the pressure of the emulsified liquid in the upright column to increase to the rated pressure, the pressure relief valve is automatically opened and starts to relieve the pressure, and when the pressure of the emulsified liquid in the upright column drops below the rated pressure, the pressure relief valve is automatically closed immediately to keep the emulsified liquid in the upright column to have relatively constant pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910376444.8A CN110080813B (en) | 2019-05-07 | 2019-05-07 | Roof cutting and side protecting device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910376444.8A CN110080813B (en) | 2019-05-07 | 2019-05-07 | Roof cutting and side protecting device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110080813A CN110080813A (en) | 2019-08-02 |
| CN110080813B true CN110080813B (en) | 2021-08-13 |
Family
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| HU198888B (en) * | 1987-05-18 | 1989-12-28 | Borsodi Szenbanyak | Apparatus for in situ mounting large-size machine units particularly mine shields |
| SK285731B6 (en) * | 2003-12-19 | 2007-07-06 | Hornonitrianske Bane Prievidza, A. S. | Section of mining sliding support |
| CN203145980U (en) * | 2012-12-04 | 2013-08-21 | 河南南车重型装备有限公司 | Mining shed lifting support |
| CN103758545A (en) * | 2013-12-06 | 2014-04-30 | 中煤北京煤矿机械有限责任公司 | Anti-slide mechanism for top beam of hydraulic support |
| CN105178990A (en) * | 2015-08-26 | 2015-12-23 | 天地科技股份有限公司 | Series-connection hydraulic support for tunnel floor dinting |
| CN106168138B (en) * | 2015-09-30 | 2018-07-06 | 北京中矿创新联盟能源环境科学研究院 | Transition support and equipment system of roadway-free and coal-pillar-free self-retained roadway mining method |
| CN105971649A (en) * | 2016-06-30 | 2016-09-28 | 中煤北京煤矿机械有限责任公司 | Whole set of supporting equipment for roof cutting entry retaining |
| CN206477872U (en) * | 2017-01-03 | 2017-09-08 | 鄂尔多斯市营盘壕煤炭有限公司 | A kind of mine support device |
| CN109026108B (en) * | 2018-09-14 | 2019-10-01 | 天地科技股份有限公司 | A kind of intelligent adaptive advanced hydraulic support |
| CN109026110B (en) * | 2018-11-03 | 2019-10-01 | 天地科技股份有限公司 | A kind of advanced hydraulic support of foldable walking |
| CN109441497B (en) * | 2018-12-24 | 2024-01-30 | 永城煤电控股集团有限公司 | Complete equipment for advanced support and transportation without repeated support and transportation method |
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