CN109578030B - Pneumatic rib-forming prevention device for mine and pneumatic rib-forming prevention method thereof - Google Patents
Pneumatic rib-forming prevention device for mine and pneumatic rib-forming prevention method thereof Download PDFInfo
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- CN109578030B CN109578030B CN201811507477.3A CN201811507477A CN109578030B CN 109578030 B CN109578030 B CN 109578030B CN 201811507477 A CN201811507477 A CN 201811507477A CN 109578030 B CN109578030 B CN 109578030B
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- 230000002265 prevention Effects 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003245 coal Substances 0.000 claims abstract description 59
- 230000008093 supporting effect Effects 0.000 claims abstract description 47
- 238000004901 spalling Methods 0.000 claims abstract description 16
- 238000005065 mining Methods 0.000 claims abstract description 11
- 238000007789 sealing Methods 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 2
- 239000000523 sample Substances 0.000 abstract description 3
- 238000010276 construction Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 230000005641 tunneling Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D19/00—Provisional protective covers for working space
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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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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- General Life Sciences & Earth Sciences (AREA)
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- Force Measurement Appropriate To Specific Purposes (AREA)
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
The invention discloses a mining pneumatic rib spalling prevention device and a pneumatic rib spalling prevention method thereof, wherein a pneumatic telescopic device is utilized to press the rib spalling part of a coal wall, so that the danger of collapse of the coal wall is avoided; the ball hinge structure is arranged at the tail part of the pneumatic supporting device, and the ball hinge structure is arranged between the movable rod and the top plate structure, so that the acting force of the pneumatic supporting device can vertically act on the top plate structure, and the top plate structure is ensured not to deviate on the coal wall when being used for a long time; the pressure sensing probe is arranged on the coal wall at the top plate supporting position, and the pressure intensity in the sealed air cavity can be automatically adjusted according to the coal wall caving pressure fed back by the pressure sensing probe, so that the stress between the top plate and the coal wall is balanced, and the labor cost is saved.
Description
Technical Field
The invention relates to the technical field of rib spalling prevention, in particular to a pneumatic rib spalling prevention device for a mine and a pneumatic rib spalling prevention method thereof.
Background
The 12032 cut-hole tunneling working face is the first cut-hole tunneling working face along an empty roadway of mine and Xinjiang company, the inclination angle of a coal seam is 28-36 degrees, the vertical height of a facing wall is 3.1m, and the working face needs to pass through two crossroads and a safety protection coal pillar during construction and passes through a fault. The above factors are all key areas of the coal seam which are greatly influenced, and the coal seam is crushed under pressure. In the tunneling construction process, because the exposed area of the head-on wall is large, when the air pick construction process is adopted, the exposed time of the head-on wall is relatively long, so that favorable conditions are created for the coal gangue falling and sliding of the head-on wall, and certain safety threat is undoubtedly caused to constructors.
After the ore layer is mined, the top rock layer of the goaf is suspended, the pressure of the top rock layer is transferred to the coal wall, the pressure borne by the coal wall is increased to form a supercharging area, and a part of coal is crushed and extruded to the goaf under the action of additional load on the coal wall, which is called ledge caving.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects in the prior art, the invention provides a pneumatic rib-caving prevention device for a mine and a pneumatic rib-caving prevention method thereof, which can effectively prevent rib-caving danger from occurring on a coal wall.
The technical scheme is as follows: in order to achieve the aim, the invention discloses a mining pneumatic rib-forming prevention device, which comprises the following components: the coal mine tunnel supporting device is characterized by comprising a pneumatic telescopic device and a supporting structure, wherein the pneumatic telescopic device is transversely arranged in the mine tunnel through the supporting structure, the tail part of the pneumatic telescopic device is provided with a supporting block, the supporting block is connected with a tail ball hinge of the pneumatic telescopic device and is arranged on the left rock wall of the mine tunnel in a pressing mode, the top of the pneumatic telescopic device is provided with a top plate structure, and the pneumatic telescopic; the coal wall caving part is jacked by utilizing the pneumatic telescoping device, so that the danger of collapse of the coal wall is avoided.
The pneumatic telescopic device comprises a fixed cylinder and a movable rod, the tail part of the movable rod is telescopically arranged in the fixed cylinder, a sealing gasket is sleeved at the tail part of the movable rod, and a sealing air cavity is formed by the tail part of the movable rod and an inner cavity of the fixed cylinder; an oblong groove is formed in the inner wall of the front end of the fixed cylinder along the telescopic direction of the movable rod, a limiting column is arranged on the movable rod, and the limiting column is arranged in the oblong groove in a sliding mode; and a compression spring is arranged between the front end surface of the inner cavity of the fixed cylinder and the limiting column. The sealing washer is arranged to prevent the movable rod and the inner wall of the fixed cylinder from being abraded to cause poor air tightness in the sealed air cavity; a long elliptic groove is arranged in the fixed cylinder, so that the movable rod can stretch and retract along the length direction of the fixed cylinder all the time, and the pneumatic supporting device can apply force along one direction.
Furthermore, the supporting structure is arranged in a Y shape, a threaded connecting column is arranged at the fixed end of the supporting structure, a supporting beam is arranged at the top of the mine hole, and the supporting structure is arranged below the supporting beam through the threaded connecting column; the supporting structure is characterized in that a plurality of pin holes are formed in the supporting position of the supporting structure along the vertical direction at equal intervals, fixing pin shafts are fixedly arranged in the pin holes, fixing lantern rings are sleeved on the outer surfaces of the fixing cylinders, supporting holes are formed in the fixing lantern rings, the fixing pin shafts are inserted into the supporting holes, and the fixing cylinders which are arranged together with the fixing lantern rings are arranged around the fixing pin shafts in a swinging mode. The position of the fixed pin shaft is adjusted to realize fine adjustment of the supporting direction of the pneumatic supporting device, so that the pneumatic supporting device enables the top plate structure to be positively pressed at the coal wall rib stripping position.
Further, the top plate structure comprises a connecting part, a frustum structure and a top plate; the connecting part is supported and arranged on the smaller bottom surface of the frustum structure, and the larger bottom surface of the frustum structure is arranged on the end surface of the top plate; the top end of the movable rod is provided with a spherical structure, the connecting part is provided with a spherical groove, the spherical structure is arranged in the spherical groove, and the top end of the movable rod is matched with the spherical hinge of the top plate structure. The acting force of the movable rod on the connecting part can be dispersed to the whole top plate through the frustum structure, so that the stress of the whole surface of the top plate is uniform, and the supporting effect on the rib caving part of the coal wall is facilitated.
Furthermore, a plurality of protruding structures are arranged on the larger bottom surface of the frustum structure, the protruding structures are arranged in a conical column shape, the heights of the protruding structures are arranged in a staggered mode, and the protruding structures are perpendicular to the end face of the top plate; the end face, close to the frustum structure, of the top plate is provided with groove holes matched with the protruding structures in a one-to-one correspondence mode, the depth of each groove hole is larger than the length of each protruding structure, the protruding structures are arranged in the groove holes, and the large bottom face of the frustum structure is bonded with the end face of the top plate. The protruding structure can make the structural power of frustum act on with the roof face perpendicularly, makes roof perpendicular to coal wall roof pressure.
Furthermore, a pressure detector is arranged in the coal wall at the top pressure position of the top plate; an air inlet pipe and an air outlet pipe are arranged close to the tail end of the pneumatic telescopic device, the air inlet pipe and the air outlet pipe are respectively communicated with the sealed air cavity, and a first electromagnetic valve and a second electromagnetic valve are respectively arranged on the air inlet pipe and the air outlet pipe; and the signal output end of the pressure detector is connected with the signal input end of the controller, and the signal output end of the controller is respectively connected with the signal input end of the first electromagnetic valve and the signal input end of the second electromagnetic valve. The pressure detector is arranged to automatically adjust the pressure in the sealed air cavity according to the pressure of the rib spalling of the coal wall, so that the stress between the top plate and the coal wall is balanced.
A mining pneumatic rib-caving prevention method comprises the following steps: comprises that
Step one, detecting a rib part: arranging a pressure detector in one side of the coal wall of the mine hole, and detecting a maximum pressure point;
secondly, installing a pneumatic rib spalling prevention device: adjusting the position and the angle of the pneumatic telescopic device to enable the top plate to be opposite to the extrusion rib part;
step three, voltage regulation and balance: and opening the first electromagnetic valve, filling gas into the sealed gas cavity from the gas inlet pipe, enabling the movable rod to tightly push the top plate to the coal wall rib part, and carrying out zero setting on the pressure detector at the moment. When the pressure detector senses that the pressure is increased, the air inlet pipe is used for inflating the sealed air cylinder to enable the pressure of the movable rod to the top plate to be increased, and the pressure at the top plate and the coal wall rib is balanced.
Further, in the first step, pressure detectors are uniformly arranged on the coal wall side of the mine hole in a honeycomb array mode, and the distance between every two adjacent pressure detectors is 0.5 m; the signal output end of the pressure detector is connected with the signal input end of the controller, and the controller is provided with a mark detection device for detecting the marks of the pressure detectors. When the detectors distributed in the honeycomb array detect the same area, the required detectors are the least, and the cost is saved.
Has the advantages that: according to the pneumatic rib spalling prevention device for the mine and the method for the pneumatic rib spalling prevention of the pneumatic rib spalling prevention device, the rib spalling position of the coal wall is pressed by the pneumatic telescopic device, so that the danger of collapse of the coal wall is avoided; the ball hinge structure is arranged at the tail part of the pneumatic supporting device, and the ball hinge structure is arranged between the movable rod and the top plate structure, so that the acting force of the pneumatic supporting device can vertically act on the top plate structure, and the top plate structure is ensured not to deviate on the coal wall when being used for a long time; the pressure detector is arranged on the coal wall at the top plate supporting position, and the pressure intensity in the sealed air cavity can be automatically adjusted according to the coal wall caving pressure fed back by the pressure detector, so that the stress between the top plate and the coal wall is balanced, and the labor cost is saved.
Drawings
FIG. 1 is a schematic view of a support structure of the pneumatic rib-forming prevention device of the present invention;
FIG. 2 is a schematic view of the internal structure of the pneumatic telescopic device of the present invention;
FIG. 3 is a schematic structural view of the support structure of the present invention;
FIG. 4 is a schematic structural view of the pneumatic telescoping device and top plate arrangement of the present invention;
FIG. 5 is a schematic structural view of the top plate structure of the present invention;
FIG. 6 is a schematic view of the frustum structure of the present invention;
FIG. 7 is a schematic view of the distribution of the pressure probe of the present invention on the coal wall.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in the attached drawings 1-7, the mining pneumatic rib spalling prevention device comprises: the pneumatic telescopic device comprises a pneumatic telescopic device 1 and a supporting structure 2, wherein the pneumatic telescopic device 1 is transversely arranged in a mine hole through the supporting structure 2, a supporting block 3 is arranged at the tail part of the pneumatic telescopic device 1, the supporting block 3 is connected with a ball hinge at the tail part of the pneumatic telescopic device 1, the supporting direction of the pneumatic telescopic device 1 can be adjusted, and the top plate 43 can be supported; the supporting block 3 is arranged on a left rock wall 5 of the mine tunnel in a propping mode, a top plate structure 4 is arranged at the top of the pneumatic telescopic device 1, and the pneumatic telescopic device 1 props the top plate structure 4 against a coal wall 6; the pneumatic telescopic device 1 is utilized to press the rib caving part of the coal wall 6, so that the danger of collapse of the coal wall 6 is avoided.
The pneumatic telescopic device 1 comprises a fixed cylinder 11 and a movable rod 12, the tail part of the movable rod 12 is telescopically arranged in the fixed cylinder 11, a sealing washer 13 is sleeved at the tail part of the movable rod 12, and the sealing washer 13 can prevent the movable rod 12 from being directly contacted and abraded with the inner wall of the fixed cylinder 11, so that a protection effect is achieved; the tail part of the movable rod 12 and the inner cavity of the fixed cylinder 11 form a sealed air cavity 14, and the movable rod 12 is stretched by the pressure generated in the sealed air cavity 14; an oblong groove 111 is formed in the inner wall of the front end of the fixed cylinder 11 along the extending direction of the movable rod 12, a limiting column 121 is arranged on the movable rod 12, the movable rod 12 can extend and retract along the extending direction all the time, the extending direction of the movable rod 12 is prevented from changing after the movable rod 12 is used for a long time, and the limiting column 121 is arranged in the oblong groove 111 in a sliding mode; a compression spring 15 is arranged between the front end face of the inner cavity of the fixed cylinder 11 and the limiting column 121, so that the movable rod 12 can be contracted into the fixed cylinder 11 when not stressed, and the pneumatic telescopic device 1 is convenient to carry.
The support structure 2 is arranged in a Y shape, the support structure 2 supports the pneumatic telescopic device 1, a threaded connecting column 211 is arranged at the fixed end of the support structure 2, a support beam 7 is arranged at the top of the mine hole, and the support structure 2 is arranged below the support beam 7 through the threaded connecting column 211; the support part 22 of the support structure 2 is provided with a plurality of pin holes along the vertical direction at equal intervals, a fixed pin shaft 221 is fixedly arranged in each pin hole, the fixed pin shaft 221 can be fixed in different pin holes, a fixed sleeve ring 16 is sleeved on the outer surface of the fixed cylinder 11, the fixed sleeve ring 16 is composed of two semicircular ring structures, the semicircular ring structures are locked on the outer wall of the fixed cylinder 11 through bolts, a support hole 161 is formed in the fixed sleeve ring 16, the fixed pin shaft 221 is inserted in the support hole 161, the fixed cylinder 11 arranged together with the fixed sleeve ring 16 swings around the fixed pin shaft 221, the setting direction of the fixed cylinder 11 is finely adjusted, and the pneumatic telescopic device 1 is favorable for enabling the top plate structure 4 to be positively pressurized at the coal wall 6 rib positions.
The top plate structure 4 comprises a connecting part 41, a frustum structure 42 and a top plate 43; the connecting part 41 is supported and arranged on the smaller bottom surface of the frustum structure 42, the larger bottom surface of the frustum structure 42 is arranged on the end surface of the top plate 43, and the acting force of the movable rod 12 on the connecting part 41 can be dispersed to the whole top plate 43 by arranging the frustum structure 42, so that the whole plate surface of the top plate 43 is uniformly stressed, and the supporting effect on the rib part of the coal wall 6 is facilitated. The top end of the movable rod 12 is provided with a spherical structure 122, the connecting part 41 is provided with a spherical groove 411, the spherical structure 122 is arranged in the spherical groove 411, the top end of the movable rod 12 is matched with a spherical hinge of the top plate structure 4, the spherical hinge is arranged to finely adjust the direction of the pressure applied to the top plate structure 4 by the movable rod, and the pneumatic telescopic device 1 is always vertical to the acting force of the top plate structure 4.
A plurality of protruding structures 421 are arranged on the larger bottom surface of the frustum structure 42, the protruding structures 421 are arranged in a conical column shape, and the heights of the protruding structures 421 are staggered, so that the acting force of the protruding structures 421 on the top plate 43 cannot act on the same plane in the top plate 43, and the top plate 43 is prevented from being damaged by the protruding structures 421; the convex structure 421 is perpendicular to the end surface of the top plate 43, so that the force on the frustum structure 42 acts on the surface of the top plate 43 vertically, and the top plate 43 is perpendicular to the coal wall 6 and is pressed; roof 43 is provided with on being close to frustum structure 42's the terminal surface with protruding structure 421 one-to-one complex recess hole, and the degree of depth in recess hole is greater than protruding structure 421's length, protruding structure 421 sets up in the recess hole, and bonds between the great bottom surface of frustum structure 42 and the roof 43 terminal surface and set up, is favorable to frustum structure 42 and roof 43's fixed.
A pressure detector is arranged in the coal wall 6 at the top pressure part of the top plate 43, when the rib caving of the coal wall is gradually serious, the pressure between coal beds can be increased and can be detected by the pressure detector; an air inlet pipe 17 and an air outlet pipe 18 are arranged near the tail end of the pneumatic telescopic device 1, the air inlet pipe 17 and the air outlet pipe 18 are respectively communicated with the sealed air cavity 14, and a first electromagnetic valve and a second electromagnetic valve are respectively arranged on the air inlet pipe 17 and the air outlet pipe 18; and the signal output end of the pressure detector is connected with the signal input end of the controller, and the signal output end of the controller is respectively connected with the signal input end of the first electromagnetic valve and the signal input end of the second electromagnetic valve. When the pressure detector senses that the pressure is increased, the air inlet pipe 17 is used for inflating the sealed air cavity 14 to increase the pressure of the movable rod 12 on the top plate 43, and when the pressure detector senses that the pressure is reduced, the air exhaust pipe 18 is used for deflating the sealed air cavity 14 to reduce the pressure of the movable rod 12 on the top plate 43; the coal wall 6 at the supporting position of the top plate 43 is provided with the pressure detector, and the pressure in the sealed air cavity 14 can be automatically adjusted according to the rib pressure of the coal wall 6 fed back by the pressure detector, so that the stress between the top plate 43 and the coal wall 6 is balanced, and the labor cost is saved.
A method for preventing the caving of mining pneumatic wall includes
Step one, detecting a rib part: a pressure detector 8 is arranged in one side of the coal wall 6 of the mine hole to detect a maximum pressure point; uniformly arranging pressure detectors 8 on the side of the coal wall 6 of the mine hole in a honeycomb array mode, wherein the distance between every two adjacent pressure detectors 8 is 0.5 m; the signal output end of the pressure detector 8 is connected with the signal input end of the controller, and the controller is provided with a mark detection device for detecting the marks of the pressure detectors 8; when the pressure detectors 8 distributed in the honeycomb array detect the same area, the required pressure detectors 8 are the least, and the effect of saving the cost is achieved.
Secondly, installing a pneumatic rib spalling prevention device: fixing the supporting block 3 on the rock wall 5, and adjusting the position of a fixed pin shaft 221 on the supporting structure 2 to enable the pneumatic telescopic device 1 to generate positive pressure on the top plate structure 4, so that the top plate 43 is opposite to the part for extruding the rib of the coal wall 6;
step three, voltage regulation and balance: opening a first electromagnetic valve, filling gas into the sealed gas cavity 14 from the gas inlet pipe 17, enabling the movable rod 12 to tightly prop the top plate 43 against the rib part of the coal wall 6, and carrying out zero setting on the pressure detector at the moment; at this time, when the pressure detector senses that the pressure is increased, the air inlet pipe 17 is used for inflating the sealed air cylinder 14 to enable the pressure of the movable rod 12 to the top plate 43 to be increased, and when the pressure detector senses that the pressure is reduced, the air discharging pipe 18 is used for discharging air in the sealed air cavity 14 to enable the pressure of the movable rod 12 to the top plate 43 to be reduced, so that the pressure at the rib part of the top plate 43 and the coal wall 6 is always balanced.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (6)
1. The utility model provides a mining pneumatic rib spalling prevention device which characterized in that: the mine tunnel coal wall supporting device comprises a pneumatic telescopic device (1) and a supporting structure (2), wherein the pneumatic telescopic device (1) is transversely arranged in a mine tunnel through the supporting structure (2), a supporting block (3) is arranged at the tail part of the pneumatic telescopic device (1), the supporting block (3) is connected with a ball hinge at the tail part of the pneumatic telescopic device (1), the supporting block (3) is arranged on a left rock wall (5) of the mine tunnel in a pressing mode, a top plate structure (4) is arranged at the top of the pneumatic telescopic device (1), and the top plate structure (4) is pressed on a coal wall (6) by the pneumatic telescopic device (1);
the pneumatic telescopic device (1) comprises a fixed cylinder (11) and a movable rod (12), the tail part of the movable rod (12) is arranged in the fixed cylinder (11) in a telescopic mode, a sealing gasket (13) is sleeved on the tail part of the movable rod (12), and a sealing air cavity (14) is formed between the tail part of the movable rod (12) and the inner cavity of the fixed cylinder (11); an oblong groove (111) is formed in the inner wall of the front end of the fixed cylinder (11) along the telescopic direction of the movable rod (12), a limiting column (121) is arranged on the movable rod (12), and the limiting column (121) is arranged in the oblong groove (111) in a sliding mode; a compression spring (15) is arranged between the front end surface of the inner cavity of the fixed cylinder (11) and the limiting column (121);
the supporting structure (2) is arranged in a Y shape, a threaded connecting column (211) is arranged at the fixed end of the supporting structure (2), a supporting beam (7) is arranged at the top of the mine hole, and the supporting structure (2) is arranged below the supporting beam (7) through the threaded connecting column (211); support position (22) of bearing structure (2) are provided with a plurality of pinholes along vertical direction equidistance, the pinhole internal fixation is provided with fixed round pin axle (221), the cover is equipped with fixed lantern ring (16) on fixed cylinder (11) surface, be provided with brace hole (161) on the fixed lantern ring (16), fixed round pin axle (221) are inserted and are established in brace hole (161), and fixed cylinder (11) that set up together with fixed lantern ring (16) are around fixed round pin axle (221) swing setting.
2. The mining pneumatic rib-forming prevention device according to claim 1, wherein: the top plate structure (4) comprises a connecting part (41), a frustum structure (42) and a top plate (43); the connecting part (41) is supported and arranged on the smaller bottom surface of the frustum structure (42), and the larger bottom surface of the frustum structure (42) is arranged on the end surface of the top plate (43); the top end of the movable rod (12) is provided with a spherical structure (122), the connecting part (41) is provided with a spherical groove (411), the spherical structure (122) is arranged in the spherical groove (411), and the top end of the movable rod (12) is matched with the spherical hinge of the top plate structure (4).
3. The mining pneumatic rib-forming prevention device according to claim 2, wherein: a plurality of protruding structures (421) are arranged on the larger bottom surface of the frustum structure (42), the protruding structures (421) are arranged in a conical column shape, the heights of the protruding structures (421) are arranged in a staggered mode, and the protruding structures (421) are perpendicular to the end face of the top plate (43); the end face, close to the frustum structure (42), of the top plate (43) is provided with groove holes matched with the protruding structures (421) in a one-to-one correspondence mode, the depth of each groove hole is larger than the length of each protruding structure (421), the protruding structures (421) are arranged in the groove holes, and the large bottom face of the frustum structure (42) is bonded with the end face of the top plate (43).
4. The mining pneumatic rib-forming prevention device according to claim 3, wherein: a pressure detector is arranged in the coal wall (6) at the top pressure part of the top plate (43); an air inlet pipe (17) and an air outlet pipe (18) are arranged close to the tail end of the pneumatic telescopic device (1), the air inlet pipe (17) and the air outlet pipe (18) are respectively communicated with the sealed air cavity (14), and a first electromagnetic valve and a second electromagnetic valve are respectively arranged on the air inlet pipe (17) and the air outlet pipe (18); and the signal output end of the pressure detector is connected with the signal input end of the controller, and the signal output end of the controller is respectively connected with the signal input end of the first electromagnetic valve and the signal input end of the second electromagnetic valve.
5. A mining pneumatic anti-caving method of the device according to claim 4, characterized in that: comprises that
Step one, detecting a rib part: a pressure detector (8) is arranged in one side of the coal wall (6) of the mine hole and detects a point with the maximum pressure;
secondly, installing a pneumatic rib spalling prevention device: adjusting the position and the angle of the pneumatic telescopic device (1) to ensure that the top plate (43) is opposite to the extrusion rib part;
step three, voltage regulation and balance: and opening the first electromagnetic valve, filling gas into the sealed air cavity (14) from the gas inlet pipe (17), and enabling the movable rod (12) to tightly push the top plate (43) to the rib part of the coal wall (6) so as to zero the pressure detector at the moment.
6. The method for preventing the caving of the mining pneumatic according to claim 5, wherein: in the first step, pressure detectors (8) are uniformly arranged on the side of a coal wall (6) of a mine hole in a honeycomb array mode, and the distance between every two adjacent pressure detectors (8) is 0.5 m; and the signal output end of the pressure detector (8) is connected with the signal input end of the controller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811507477.3A CN109578030B (en) | 2018-12-11 | 2018-12-11 | Pneumatic rib-forming prevention device for mine and pneumatic rib-forming prevention method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811507477.3A CN109578030B (en) | 2018-12-11 | 2018-12-11 | Pneumatic rib-forming prevention device for mine and pneumatic rib-forming prevention method thereof |
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| Publication Number | Publication Date |
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| CN109578030A CN109578030A (en) | 2019-04-05 |
| CN109578030B true CN109578030B (en) | 2020-09-11 |
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| CN201811507477.3A Expired - Fee Related CN109578030B (en) | 2018-12-11 | 2018-12-11 | Pneumatic rib-forming prevention device for mine and pneumatic rib-forming prevention method thereof |
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Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3503495B2 (en) * | 1998-10-20 | 2004-03-08 | 株式会社大林組 | Rock fall protection device for working in tunnel |
| CN201196095Y (en) * | 2007-12-31 | 2009-02-18 | 枣庄市弘大实业总公司 | Pneumatic beam for temporary support in digging |
| CN101446193B (en) * | 2008-12-12 | 2012-10-24 | 中国矿业大学 | Device and method for detecting coal seam gas pressure and coal wall stress |
| CN203214076U (en) * | 2013-04-11 | 2013-09-25 | 安徽恒源煤电股份有限公司 | Wall caving preventing net for tunneling construction |
| CN105697013A (en) * | 2016-03-31 | 2016-06-22 | 中国矿业大学(北京) | Contractible temporary support for tunneling tunnel |
| CN206069094U (en) * | 2016-08-30 | 2017-04-05 | 苏州佳尔特新材料科技有限公司 | For the supporting tool of solar energy backboard thin film |
| CN206802610U (en) * | 2017-05-17 | 2017-12-26 | 何志远 | A kind of novel mechanical automatic extending-contracting apparatus |
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