CN114109459B - Anti-impact and anti-danger roadway support-surrounding rock expansion integrated system - Google Patents
Anti-impact and anti-danger roadway support-surrounding rock expansion integrated system Download PDFInfo
- Publication number
- CN114109459B CN114109459B CN202111391406.3A CN202111391406A CN114109459B CN 114109459 B CN114109459 B CN 114109459B CN 202111391406 A CN202111391406 A CN 202111391406A CN 114109459 B CN114109459 B CN 114109459B
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- Prior art keywords
- valve
- hydraulic prop
- expansion
- surrounding rock
- impact
- Prior art date
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- 239000011435 rock Substances 0.000 title claims abstract description 53
- 238000007789 sealing Methods 0.000 claims description 35
- 239000007788 liquid Substances 0.000 claims description 13
- 238000004901 spalling Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000839 emulsion Substances 0.000 abstract description 4
- 230000002195 synergetic effect Effects 0.000 abstract description 3
- 101100521345 Mus musculus Prop1 gene Proteins 0.000 description 15
- 108700017836 Prophet of Pit-1 Proteins 0.000 description 15
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 239000003245 coal Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/14—Telescopic props
- E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
-
- 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
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
- E21D15/50—Component parts or details of props
- E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
- E21D15/517—Extension elements
-
- 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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
Abstract
The invention discloses an impact-resistant and dangerous-release roadway support-surrounding rock expansion integrated system which comprises a support system and an expansion system, wherein the support system consists of a hydraulic prop and a three-purpose valve, the expansion system consists of a pressure relay, a two-position two-way electromagnetic valve, a one-way valve, a two-position four-way electromagnetic valve and rock expansion equipment, and the support system is connected with the expansion system through a conduit of the hydraulic prop. The invention can reutilize the emulsion released by the hydraulic prop, is used for expanding surrounding rock of rock expanding equipment, simultaneously avoids prop damage caused by the fact that the hydraulic prop safety valve is not as fast as pressure release, and maintains the safety of the whole supporting system. The integrated system can realize the synergistic effect of the release of the expansion stress of the surrounding rock and the roadway support, so as to achieve the effect of eliminating the impact disaster of the surrounding rock.
Description
Technical Field
The invention relates to the technical field of support systems, in particular to an impact-resistant and danger-relieving roadway support-surrounding rock expansion integrated system.
Background
The rock burst is a sudden and violent power-destroying phenomenon generated by the instantaneous release of the elastic deformation energy of surrounding rock of a coal mine, and is one of the serious power disasters in the production of the coal mine. The support is the one most directly facing the risk of impact and preventing the failure of the surrounding rock. The hydraulic prop is a telescopic prop which utilizes the hydraulic pressure to generate working resistance and realize lifting and unloading, when the external load exceeds the threshold value set by the hydraulic prop, the safety valve is immediately opened to discharge liquid and release pressure, and when the load is reduced to be within the threshold value, the safety valve is automatically closed.
In the underground exploitation process, although the common hydraulic prop is widely applied, a serious defect exists, the hydraulic prop safety valve is used for releasing pressure in unit time to discharge a certain flow, and if the impact is too large in sudden impact, the safety valve can cause damages such as explosion cylinder, sealing ring crushing, prop instability bending and the like when the impact is too large, so that the support of the whole support system is invalid, and hidden danger is caused to underground safety.
Disclosure of Invention
The invention aims to provide an impact-resistant and dangerous-release roadway support-surrounding rock expansion integrated system, which solves the problems in the prior art, relieves the pressure of a hydraulic prop, releases the stress of redundant rock mass when splitting surrounding rock, and further maintains the safety of the whole support system.
In order to achieve the above object, the present invention provides the following solutions:
the invention provides an impact-resistant and dangerous-release roadway support-surrounding rock expansion integrated system, which comprises a support system and an expansion system; the support system consists of a hydraulic prop and a three-purpose valve; the expansion system consists of a pressure relay, a two-position two-way electromagnetic valve, a one-way valve, a two-position four-way electromagnetic valve and rock expansion equipment; the support system is connected with the expansion system through a conduit of the hydraulic prop.
Preferably, the hydraulic prop in the support system comprises a cylinder, a base and a conduit; the cylinder body is sleeved on the base, and a sealing groove is arranged between the cylinder body and the base; the base is provided with a through hole communicated with the inner cavity of the hydraulic prop; the outer end of the through hole is provided with an annular groove; the annular groove is provided with threads so as to be in threaded connection with the guide pipe; the guide pipe is internally provided with threads which are connected with the annular groove in a threaded manner, and the guide pipe is internally provided with a stepped hole; a sealing groove is arranged on the stepped hole, and the stepped hole is in contact fit with the outer end face of the through hole; one end of the guide pipe is connected with the inner cavity of the hydraulic prop, and the other end of the guide pipe is connected with the expansion system.
Preferably, the upper end sealing groove of the base is provided with a sealing ring for sealing, and the lower end sealing groove is provided with a steel wire composite sealing strip for sealing; and a sealing groove of the stepped hole is provided with a sealing ring for sealing.
Preferably, the three-purpose valve in the support system is integrated with a one-way valve, an unloading valve and a safety valve; the one-way valve is connected with the hydraulic pump and is used for injecting liquid; the oil way where the unloading valve and the safety valve are is connected in parallel; the unloading valve is used for unloading so as to enable the hydraulic prop to return to the column; and the safety valve is unloaded when the pressure reaches a certain value, so that the internal pressure of the hydraulic prop is kept constant.
Preferably, the expansion system is connected with a conduit of the hydraulic prop; a pressure relay is arranged between the two-position two-way electromagnetic valve and the guide pipe; the pressure relay can convert the pressure signal into an electric signal, controls the power on and off of the two-position two-way electromagnetic valve and the two-position four-way electromagnetic valve magnet, and the set pressure threshold value is slightly lower than the opening threshold value of the safety valve; the two-position two-way electromagnetic valve can realize connection and interruption of a pipeline after signals are obtained; the two-position four-way electromagnetic valve can realize the reversing of the pipeline after obtaining the signal; the rock burst equipment can convert liquid pressure into burst force so as to burst surrounding rock.
Compared with the prior art, the invention has the following technical effects:
the invention can reutilize the emulsion released by the hydraulic prop, is used for expanding surrounding rock of rock expanding equipment, simultaneously avoids prop damage caused by the fact that the hydraulic prop safety valve is not as fast as pressure release, and maintains the safety of the whole supporting system. The integrated system can realize the synergistic effect of the release of the expansion stress of the surrounding rock and the roadway support, so as to achieve the effect of eliminating the impact disaster of the surrounding rock.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of an impact-resistant and dangerous roadway support-surrounding rock spalling integrated system.
Fig. 2 is a schematic view of the bottom structure of the hydraulic prop in the present invention.
Fig. 3 is a schematic structural view of a base in the present invention.
Fig. 4 is a schematic structural view of a cylinder body in the present invention.
Fig. 5 is a schematic view of the structure of the catheter in the present invention.
Wherein: the hydraulic support comprises a 1-hydraulic support, a 2-cylinder, a 3-oil tank, a 4-hydraulic pump, a 5-one-way valve, a 6-unloading valve, a 7-safety valve, an 8-three-way valve, a 9-pressure relay, a 10-two-position two-way solenoid valve, a 11-two-position four-way solenoid valve, a 12-rock expansion device, a 13-base, a 14-conduit, a 15-sealing groove, a 16-annular groove, a 17-through hole outer end face, a 18-through hole, a 19-stepped hole, a 20-support system and a 21-expansion system.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by a person skilled in the art based on the embodiments of the invention without any inventive effort, are intended to fall within the scope of the invention.
The invention aims to provide an impact-resistant and dangerous roadway support-surrounding rock expansion integrated system, which solves the problems in the prior art, and is used for reutilizing emulsion released by a hydraulic prop for expanding surrounding rock of rock expansion equipment, and simultaneously avoiding prop damage caused by the fact that a hydraulic prop safety valve is not used for relieving pressure release, so that the safety of the whole support system is maintained. The integrated system can realize the synergistic effect of the release of the expansion stress of the surrounding rock and the roadway support, so as to achieve the effect of eliminating the impact disaster of the surrounding rock.
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1 to 5: the embodiment provides an impact-resistant and dangerous-release roadway support-surrounding rock expansion integrated system, which comprises a support system 20 and an expansion system 21; the support system 20 consists of a hydraulic prop 1 and a three-way valve 8; the expansion system 21 consists of a pressure relay 9, a two-position two-way electromagnetic valve 10, a one-way valve 5, a two-position four-way electromagnetic valve 11 and rock expansion equipment 12; the support system 20 is connected to the spalling system 21 via the conduit 14 of the hydraulic prop 1.
The hydraulic prop 1 in the support system 20 comprises a cylinder 2, a foundation 13 and a conduit 14; the cylinder body 2 is sleeved on the base 13, and a sealing groove 15 is arranged between the cylinder body and the base; the base 13 is provided with a through hole 18 communicated with the inner cavity of the hydraulic prop 1; an annular groove 16 is formed at the outer end of the through hole 18; the annular groove 16 is provided with threads for threaded connection with the conduit 14; the guide pipe 14 is internally provided with threads which are in threaded connection with the annular groove 16, and the guide pipe 14 is internally provided with a stepped hole 19; the stepped hole 19 is provided with a sealing groove 15, and the stepped hole 19 is in contact fit with the outer end face 17 of the through hole; one end of the guide pipe 14 is connected with the inner cavity of the hydraulic prop 1, and the other end of the guide pipe is connected with the expansion system 21.
The upper end sealing groove 15 of the base 13 is provided with a sealing ring for sealing, and the lower end sealing groove 15 is provided with a steel wire composite sealing strip for sealing; the sealing groove 15 of the stepped hole 19 is provided with a sealing ring for sealing.
The three-way valve 8 in the support system 20 is integrated into a whole by the one-way valve 5, the unloading valve 6 and the safety valve 7; the one-way valve 5 is connected with the hydraulic pump 4 and is used for injecting liquid; the oil way where the unloading valve and the safety valve are is connected in parallel; the unloading valve 6 is used for unloading and returning the hydraulic prop 1; the relief valve 7 is unloaded when the pressure reaches a certain value, keeping the internal pressure of the hydraulic prop 1 constant.
The expansion system 21 is connected with the guide pipe 14 of the hydraulic prop 1; a pressure relay 9 is arranged between the two-position two-way electromagnetic valve 10 and the guide pipe 14; the pressure relay 9 can convert the pressure signal into an electric signal, controls the power on and power off of the two-position two-way electromagnetic valve 10 and the two-position four-way electromagnetic valve 11, and the set pressure threshold value is slightly lower than the opening threshold value of the safety valve 7; the two-position two-way electromagnetic valve 10 can realize connection and interruption of a pipeline after signals are obtained; the two-position four-way electromagnetic valve 11 can realize the reversing of a pipeline after obtaining signals; the rock burst apparatus 12 may convert the fluid pressure into a burst force to burst the surrounding rock.
The specific working process of the anti-impact and anti-danger roadway support-surrounding rock expansion integrated system is as follows:
before working, the oil way is assembled between the devices by using a hose. The liquid injection handle is inserted into the three-purpose valve 8, the hydraulic prop 1 is lifted to perform a normal preliminary supporting stage, at the moment, the two-position two-way electromagnetic valve 10 is in a normally closed position disconnection state, an oil way is disconnected, and the hydraulic prop 1 performs normal supporting work. And then the liquid injection handle is injected into the rod cavity of the rock burst equipment 12 through the one-way valve 5, and liquid injection is stopped when the piston rod of the rock burst equipment 12 is at the uppermost position, so that the rock burst equipment 12 is in a working state, and enough emulsion is reserved in the pipeline to serve as a force transfer medium.
When the hydraulic prop 1 is suddenly impacted by a large load, the pressure in the inner cavity of the hydraulic prop is rapidly increased, and when the hydraulic pressure reaches a certain value, the pressure relay 9 starts to work, and converts a pressure signal into an electric signal to control the two-position two-way electromagnetic valve 10 and the two-position four-way electromagnetic valve 11 to be electrified, so that an oil way between the hydraulic prop 1 and the rock burst equipment 12 is communicated. The high pressure liquid enters the piston cavity of the rock burst device 12 along with the high pressure liquid, and the piston rod of the high pressure liquid is pushed to move downwards to perform rock burst.
When the first wave impact is finished, the pressure in the inner cavity of the hydraulic prop 1 is gradually reduced, the pressure relay 9 is restored to an initial state, the two-position two-way electromagnetic valve 10 and the two-position four-way electromagnetic valve 11 are powered off, the hydraulic prop 1 and an oil way of the rock burst equipment 12 form a closed circuit, and the hydraulic prop 1 is restored to a normal supporting state again.
The anti-impact and anti-danger roadway support-surrounding rock expansion integrated system of the embodiment can bear repeated pressure abrupt change impact, the expansion is stopped until the piston rod in the rock expansion equipment 12 reaches the maximum stroke displacement, if the hydraulic prop is impacted again, the hydraulic prop is opened by the safety valve 7 in the three-purpose valve 8 to overflow, and then the liquid injection handle is injected into the rod cavity of the rock expansion equipment 12 through the one-way valve 5 again for return stroke, so that the impact can be resisted again. The system of the embodiment releases the internal stress of the redundant rock mass when the pressure relief protection support column is carried out, so that the safety of the whole support system is maintained.
The principles and embodiments of the present invention have been described in this specification with reference to specific examples, the description of which is only for the purpose of aiding in understanding the method of the present invention and its core ideas; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.
Claims (4)
1. An anti-impact and anti-danger roadway support-surrounding rock expansion integrated system is characterized in that: comprises a support system and a spalling system; the support system consists of a hydraulic prop and a three-purpose valve; the expansion system consists of a pressure relay, a two-position two-way electromagnetic valve, a one-way valve, a two-position four-way electromagnetic valve and rock expansion equipment; the support system is connected with the expansion system through a conduit of the hydraulic prop; a pressure relay is arranged between the two-position two-way electromagnetic valve and the guide pipe; the pressure relay can convert a pressure signal into an electric signal, the two-position two-way electromagnetic valve and the two-position four-way electromagnetic valve magnet are controlled to be powered on and powered off, and the set pressure threshold is slightly lower than the opening threshold of the safety valve; the two-position two-way electromagnetic valve can realize connection and interruption of a pipeline after signals are obtained; the two-position four-way electromagnetic valve can realize the reversing of the pipeline after obtaining the signal; the rock burst equipment can convert liquid pressure into burst force so as to burst surrounding rock.
2. The impact-resistant and danger-relieving roadway support-surrounding rock spalling integrated system as claimed in claim 1, wherein: the hydraulic prop in the support system comprises a cylinder body, a base and a guide pipe; the cylinder body is sleeved on the base, and a sealing groove is arranged between the cylinder body and the base; the base is provided with a through hole communicated with the inner cavity of the hydraulic prop; the outer end of the through hole is provided with an annular groove; the annular groove is provided with threads so as to be in threaded connection with the guide pipe; the guide pipe is internally provided with threads which are connected with the annular groove in a threaded manner, and the guide pipe is internally provided with a stepped hole; a sealing groove is arranged on the stepped hole, and the stepped hole is in contact fit with the outer end face of the through hole; one end of the guide pipe is connected with the inner cavity of the hydraulic prop, and the other end of the guide pipe is connected with the expansion system.
3. The impact-resistant and danger-relieving roadway support-surrounding rock spalling integrated system as claimed in claim 2, wherein: the upper end sealing groove of the base is provided with a sealing ring for sealing, and the lower end sealing groove is provided with a steel wire composite sealing strip for sealing; and a sealing groove of the stepped hole is provided with a sealing ring for sealing.
4. The impact-resistant and danger-relieving roadway support-surrounding rock spalling integrated system as claimed in claim 1, wherein: the three-purpose valve in the support system is integrated into a whole by a one-way valve, an unloading valve and a safety valve; the one-way valve is connected with the hydraulic pump and is used for injecting liquid; the oil way where the unloading valve and the safety valve are is connected in parallel; the unloading valve is used for unloading so as to enable the hydraulic prop to return to the column; and the safety valve is unloaded when the pressure reaches a certain value, so that the internal pressure of the hydraulic prop is kept constant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111391406.3A CN114109459B (en) | 2021-11-23 | 2021-11-23 | Anti-impact and anti-danger roadway support-surrounding rock expansion integrated system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111391406.3A CN114109459B (en) | 2021-11-23 | 2021-11-23 | Anti-impact and anti-danger roadway support-surrounding rock expansion integrated system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114109459A CN114109459A (en) | 2022-03-01 |
| CN114109459B true CN114109459B (en) | 2023-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111391406.3A Active CN114109459B (en) | 2021-11-23 | 2021-11-23 | Anti-impact and anti-danger roadway support-surrounding rock expansion integrated system |
Country Status (1)
| Country | Link |
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| CN (1) | CN114109459B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL2030437B1 (en) * | 2022-01-05 | 2023-07-10 | Univ Liaoning Technical | Support-spallation integrated system for preventing damage of surrounding rock of roadway by rock burst |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2326728Y (en) * | 1997-09-16 | 1999-06-30 | 陶纪南 | Expansion-cracking type self-adaptive multi-point-anchoring anchor |
| WO2014092854A1 (en) * | 2012-12-13 | 2014-06-19 | Schlumberger Canada Limited | Mechanically assisted fracture initiation |
| CN104989438A (en) * | 2015-06-16 | 2015-10-21 | 中国矿业大学(北京) | Safety valve on hydraulic support middle vertical shaft |
| CN205361570U (en) * | 2016-02-04 | 2016-07-06 | 潍坊亿宏重工机械有限公司 | Spalling machine |
| CN108266226A (en) * | 2018-01-23 | 2018-07-10 | 山东理工大学 | A kind of rock burst solution danger method based on hydraulic machinery splitting |
| CN111594235A (en) * | 2020-04-22 | 2020-08-28 | 山东科技大学 | Buffer type mining supporting equipment and supporting method |
| CN113074007A (en) * | 2021-04-26 | 2021-07-06 | 辽宁工程技术大学 | Anti-impact energy absorber for hydraulic support |
-
2021
- 2021-11-23 CN CN202111391406.3A patent/CN114109459B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2326728Y (en) * | 1997-09-16 | 1999-06-30 | 陶纪南 | Expansion-cracking type self-adaptive multi-point-anchoring anchor |
| WO2014092854A1 (en) * | 2012-12-13 | 2014-06-19 | Schlumberger Canada Limited | Mechanically assisted fracture initiation |
| CN104989438A (en) * | 2015-06-16 | 2015-10-21 | 中国矿业大学(北京) | Safety valve on hydraulic support middle vertical shaft |
| CN205361570U (en) * | 2016-02-04 | 2016-07-06 | 潍坊亿宏重工机械有限公司 | Spalling machine |
| CN108266226A (en) * | 2018-01-23 | 2018-07-10 | 山东理工大学 | A kind of rock burst solution danger method based on hydraulic machinery splitting |
| CN111594235A (en) * | 2020-04-22 | 2020-08-28 | 山东科技大学 | Buffer type mining supporting equipment and supporting method |
| CN113074007A (en) * | 2021-04-26 | 2021-07-06 | 辽宁工程技术大学 | Anti-impact energy absorber for hydraulic support |
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| Publication number | Publication date |
|---|---|
| CN114109459A (en) | 2022-03-01 |
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