CN105201510A - Preventing and controlling method for creep-induced rock burst - Google Patents
Preventing and controlling method for creep-induced rock burst Download PDFInfo
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- CN105201510A CN105201510A CN201510707297.XA CN201510707297A CN105201510A CN 105201510 A CN105201510 A CN 105201510A CN 201510707297 A CN201510707297 A CN 201510707297A CN 105201510 A CN105201510 A CN 105201510A
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Abstract
The invention discloses a preventing and controlling method for creep-induced rock burst. According to the invention, construction and temporary supporting are carried out in a coal seam tunnel having a zone where creep-induced rock burst may occur; deep hole blasting is carried out on a working face in an underground chamber, three transversely arranged drill holes are constructed during blasting and undergoes blasting at the same time, and a coal body bursts and becomes loose after blasting; after blasting, surrounding rocks at the periphery of the underground chamber are supported, wherein the depth of supports is greater than 3 m from the mouth of the underground chamber and supporting strength should be greater than the strength of the coal body; and after supporting, a concrete body is used for backfilling, and the underground chamber is closed. The preventing and controlling method is applied to an ultra-deep mine, a mining area with dense tunnels, soft rock and a deep mining mine; and through deep blasting and loosening of the coal body, sudden energy of creep-induced rock burst becomes slowly-released energy which is released from the working surface of the underground chamber, and since released energy is small and the mouth of the underground chamber is closed, burst accidents do not occur and creep-induced rock burst does not occur before completion of a coal face.
Description
Technical field
The invention belongs to Coal Mining Technology field.
Background technology
China's coal-mine bump mine is right more than 150, and along with the increase of coal mining depth, bump mine and impact coal seam quantity constantly increase, and rock blast hazard seriously governs the safety in production of China's coal-mine.Facts have proved, along with seam mining develops to deep, not the mine of the degree of depth more than 1000m, rock stratum is relatively soft, coal seam that shock hazard is strong, press while damaging impact also can occur under the condition not having disturbance, it is exactly creepage type bump that such energy discharges suddenly.The control of this bump is different from general type, adopts conventional measure to be difficult to take precautions against.The creepage type producing " strongly " due to coal (rock) body destroys, if be subject to the perturbation action of work plane Dynamic stress field again, very easily occur scale greatly, destroy serious bump.
Ultra-deep portion, high-strength bump mainly occur in the region that heavily stressed distribution is wide, energy field scope is large, Coal Burst Tendency is high, in the preparatory working that these regions are in exploiting field mostly and stope space.Particularly preparatory working, due to service year limit for length, creep effect is strong, frequently bump can occur.Some old mine of China, mining depth is maximum reaches 1200m, and average mining depth is more than 800m.Therefore, for the creepage type bump tunnel that this service time is long, need to invent and a kind ofly adapt to creep and the method for the prevention and control bump of long-term stability, significant to the ultra-deep rock blast hazard of prevention and control.
Goal of the invention
The object of the invention is the Precautions for above-mentioned creepage type rock blast hazard, propose a kind of energy long-term stability and the preventing control method that can release energy, be referred to as a kind of creepage type bump preventing control method
For achieving the above object, the technical scheme that the present invention takes is:
A kind of creepage type bump preventing control method, step is as follows:
The first step, existing in the heading that creep bump section occurs, at interval of 50-60m, construction depth is greater than 5m, width and is highly more than or equal to the chamber of span length and height, and carries out temporary lining; During temporary lining, preferably adopt the mode of the bolt support; Array pitch 800*800mm between preferred bolt support;
Second step, meet head on to carry out deep hole blasting at chamber, to construct during explosion three transversely arranged borings, spacing of wells 1.0m, central bore vertically meets head on face, both sides boring outwards in 15 degree of angles, bore diameter 42mm, degree of depth 6-7m, distance bottom plate heights 1.2m, and explosive payload is 1/3 hole depth, onepull is carried out in three borings, makes coal body burst and loosen after explosion;
3rd step, after explosion, carries out supporting by the surrounding country rock of chamber, and from cave mental arithmetic, the supporting degree of depth is greater than 3 meters, supporting intensity should be greater than coal mass strength; Backfill with concrete bodies again after supporting, close chamber; Support pattern adopts bolt-spary supports or concreting supporting.
Further, support pattern also can be in the following way, first the sack of some strength is arranged at the surrounding country rock of chamber, beating anchor pole is again fixed on country rock by sack, and require that anchor pole afterbody exposes certain length, for sack leaves the concrete thickness of filling in advance, then in sack, inject concrete, after concrete setting, form concrete supporting.
Good effect of the present invention is: for ultra-deep mine, intensive mining area, tunnel, soft rock and deep mining mine, after the in-place blasting out of coal body deep, the unexpected energy of creep bump is made to become the energy of slow releasing, release from the face of meeting head on of chamber during release, owing to releasing energy, little and cave mouth is closed, can not accident be impacted, before coal-face terminates, there will not be creepage type bump.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, enforcement of the present invention is described.
Fig. 1 is chamber and borehole pattern;
Fig. 2 is chamber bolt-spary supports and concrete enclosing schematic diagram
Fig. 3 is chamber anchor pole+sacked concrete supporting and concrete enclosing schematic diagram
Fig. 4 is profile after chamber support.
Detailed description of the invention
With reference to accompanying drawing, further illustrate creepage type bump preventing control method of the present invention, step is as follows:
The first step, existing in the heading that creep bump section occurs, at interval of 50-60m, construction depth is greater than 5m, width and is highly more than or equal to the chamber of span length and height, and carries out temporary lining; During temporary lining, preferably adopt the mode of the bolt support; Array pitch 800*800mm between preferred bolt support; As shown in Figure 1.
Second step, meet head on to carry out deep hole blasting at chamber, to construct during explosion three transversely arranged borings, spacing of wells 1.0m, central bore vertically meets head on face, both sides boring outwards in 15 degree of angles, bore diameter 42mm, degree of depth 6-7m, distance bottom plate heights 1.2m, and explosive payload is 1/3 hole depth, onepull is carried out in three borings, makes coal body burst and loosen after explosion; As shown in Figure 1.
3rd step, after explosion, carries out supporting by the surrounding country rock of chamber, and from cave mental arithmetic, the supporting degree of depth is greater than 3 meters, supporting intensity should be greater than coal mass strength; Backfill with concrete bodies again after supporting, close chamber;
Support pattern adopts bolt-spary supports as shown in Figure 2,4 or concreting supporting.Also support pattern as shown in Figure 3,4 can be adopted, first the sack of some strength is arranged at the surrounding country rock of chamber, beating anchor pole is again fixed on country rock by sack, and require that anchor pole afterbody exposes certain length, for sack leaves the concrete thickness of filling in advance, then in sack, inject concrete, after concrete setting, form concrete supporting.
Claims (2)
1. a creepage type bump preventing control method, is characterized in that, step is as follows:
The first step, existing in the heading that creep bump section occurs, at interval of 50-60m, construction depth is greater than 5m, width and is highly more than or equal to the chamber of span length and height, and carries out temporary lining;
Second step, meet head on to carry out deep hole blasting at chamber, to construct during explosion three transversely arranged borings, spacing of wells 1.0m, central bore vertically meets head on face, both sides boring outwards in 15 degree of angles, bore diameter 42mm, degree of depth 6-7m, distance bottom plate heights 1.2m, and explosive payload is 1/3 hole depth, onepull is carried out in three borings, makes coal body burst and loosen after explosion;
3rd step, after explosion, carries out supporting by the surrounding country rock of chamber, and from cave mental arithmetic, the supporting degree of depth is greater than 3 meters, supporting intensity should be greater than coal mass strength; Backfill with concrete bodies again after supporting, close chamber; Described supporting adopts one of following three kinds of modes:
One is bolt-spary supports mode;
Two is concreting support patterns;
Three is the sacks first arranging some strength at the surrounding country rock of chamber, beating anchor pole is again fixed on country rock by sack, and require that anchor pole afterbody exposes certain length, for sack leaves the concrete thickness of filling in advance, then in sack, inject concrete, after concrete setting, form concrete supporting.
2. creepage type bump preventing control method as claimed in claim 1, is characterized in that, adopts the mode of the bolt support, array pitch 800*800mm between bolt support during temporary lining.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510707297.XA CN105201510B (en) | 2015-10-27 | 2015-10-27 | A kind of creepage type bump preventing control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510707297.XA CN105201510B (en) | 2015-10-27 | 2015-10-27 | A kind of creepage type bump preventing control method |
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| Publication Number | Publication Date |
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| CN105201510A true CN105201510A (en) | 2015-12-30 |
| CN105201510B CN105201510B (en) | 2018-02-06 |
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| CN201510707297.XA Expired - Fee Related CN105201510B (en) | 2015-10-27 | 2015-10-27 | A kind of creepage type bump preventing control method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368705A (en) * | 2016-10-20 | 2017-02-01 | 山东科技大学 | Method for controlling rock burst during roadway tunneling in fault fracture zone |
| CN111502662A (en) * | 2020-04-28 | 2020-08-07 | 中煤能源研究院有限责任公司 | Prevention and control method for deep pressure relief shallow part reinforcement of rock burst mine advanced coal body |
| CN113203533A (en) * | 2021-04-06 | 2021-08-03 | 淮北市平远软岩支护工程技术有限公司 | Method and equipment for verifying support body of roadway with large rock burst |
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| CN1804374A (en) * | 2006-01-06 | 2006-07-19 | 山东科技大学 | Method for preventing and controlling impact geopressure in longwall face gate of coal mine |
| CN102296958A (en) * | 2011-07-22 | 2011-12-28 | 山东科技大学 | Method for preventing rock burst by artificial space defect body |
| CN102296957A (en) * | 2011-07-22 | 2011-12-28 | 山东科技大学 | Method of transfixing and distressing with one explosion during tunneling of seam roadway with rock burst |
| CN102425416A (en) * | 2011-09-12 | 2012-04-25 | 山东科技大学 | Coal mine high stress area roadway driving face impact ground pressure control method |
| CN203783631U (en) * | 2013-12-10 | 2014-08-20 | 中国矿业大学 | Flexible filling bag for opposite-pulling anchoring rod penetrating |
-
2015
- 2015-10-27 CN CN201510707297.XA patent/CN105201510B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1804374A (en) * | 2006-01-06 | 2006-07-19 | 山东科技大学 | Method for preventing and controlling impact geopressure in longwall face gate of coal mine |
| CN102296958A (en) * | 2011-07-22 | 2011-12-28 | 山东科技大学 | Method for preventing rock burst by artificial space defect body |
| CN102296957A (en) * | 2011-07-22 | 2011-12-28 | 山东科技大学 | Method of transfixing and distressing with one explosion during tunneling of seam roadway with rock burst |
| CN102425416A (en) * | 2011-09-12 | 2012-04-25 | 山东科技大学 | Coal mine high stress area roadway driving face impact ground pressure control method |
| CN203783631U (en) * | 2013-12-10 | 2014-08-20 | 中国矿业大学 | Flexible filling bag for opposite-pulling anchoring rod penetrating |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106368705A (en) * | 2016-10-20 | 2017-02-01 | 山东科技大学 | Method for controlling rock burst during roadway tunneling in fault fracture zone |
| CN111502662A (en) * | 2020-04-28 | 2020-08-07 | 中煤能源研究院有限责任公司 | Prevention and control method for deep pressure relief shallow part reinforcement of rock burst mine advanced coal body |
| CN111502662B (en) * | 2020-04-28 | 2021-12-14 | 中煤能源研究院有限责任公司 | Prevention and control method for deep pressure relief shallow part reinforcement of rock burst mine advanced coal body |
| CN113203533A (en) * | 2021-04-06 | 2021-08-03 | 淮北市平远软岩支护工程技术有限公司 | Method and equipment for verifying support body of roadway with large rock burst |
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| CN105201510B (en) | 2018-02-06 |
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Granted publication date: 20180206 Termination date: 20211027 |