CN103742171A - Mining roadway coal pillar reinforcing method - Google Patents
Mining roadway coal pillar reinforcing method Download PDFInfo
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- CN103742171A CN103742171A CN201310734661.2A CN201310734661A CN103742171A CN 103742171 A CN103742171 A CN 103742171A CN 201310734661 A CN201310734661 A CN 201310734661A CN 103742171 A CN103742171 A CN 103742171A
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- 239000003245 coal Substances 0.000 title claims abstract description 80
- 238000000034 method Methods 0.000 title claims abstract description 10
- 238000005065 mining Methods 0.000 title claims abstract description 7
- 230000003014 reinforcing effect Effects 0.000 title abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 51
- 239000010959 steel Substances 0.000 claims abstract description 51
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000003892 spreading Methods 0.000 claims description 25
- 230000003245 working effect Effects 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 210000003205 muscle Anatomy 0.000 claims description 3
- 239000004568 cement Substances 0.000 claims description 2
- 239000004744 fabric Substances 0.000 claims description 2
- 238000007569 slipcasting Methods 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 230000035899 viability Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000005553 drilling Methods 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 230000006378 damage Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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Abstract
The invention discloses a mining roadway coal pillar reinforcing method. The method comprises, firstly, reinforcing roadway coal pillars through common anchor belt net supports; secondly, drilling coal sidewalls and penetrating the coal pillars, inserting extension anchor rods (4) into the drilled holes and laying steel strips or steel channel beams (6) on both sides of every extension anchor rod (4), wherein the steel strips or steel channel beams are arranged on constructed steel strips (5) to connect meshes (7) and the steel strips (5) into a whole to enhance the surface protection effects on the coal pillars; meanwhile, exerting high prestress on both ends of every extension anchor rod to enable the extension anchor rod to be in a three-directional stress mode and accordingly effectively control the deformation of the coal pillars in earlier stages. The extension anchor rods can be extended randomly according to the size of a roadway without restriction of roadway space, thereby being large in width applicable to the coal pillars and wide in application range. Compared with opposite-pull anchor cables, the extension anchor rods have a higher elongation rate, are applicable to the deformation characteristics of the coal pillars and can ensure no collapse of the coal pillars when large deformation occurs due to mining operation and guarantee the production safety of a mining working face.
Description
Technical field
The invention belongs to colliery tunnel support technical field, relate to the reinforcement means of coal column between a kind of stope drift active workings lane.
Background technology
The arrangement of China's coal-mine stope drift active workings has multiple, comprises that single lane is arranged, Ji Duo lane layout is arranged in two lane.The work plane less for gas emission, ocurrence of coal seam is more stable, stope drift active workings generally adopt single lane to arrange.In recent years, along with increasing substantially and the appearance of highly gassy mines in a large number of coal-face output, in order effectively to solve the problems such as transportation, ventilation and gas, work plane Shuan Xiang, many lanes layout have become a kind of main tunnel arrangement.Two or more pieces tunnel closely arranges, between lane, the stability problem of coal column becomes increasingly conspicuous.Between lane, coal column not only will be subject to the impact of this work plane mining pressure, and to be subject to next ahead work face bearing pressure impact, if can not get effective maintenance, coal column gradually dilatation generation large deformation, until destruction is caved in, affects the safety and high efficiency of work plane.Between lane, coal column generally adopts the supporting of anchor rete cord, though there is certain effect when geological conditions is better, but when complex geologic conditions, supporting and protection structure unstability presents " domino effect " more, first be that anchor cable does not adapt to the large deformation of coal column and lost efficacy, because the elongation of anchor cable is little, when reaching 200～300mm, a gang of deflection in tunnel is easy to occur failure of cable, and then the scope that causes the loose destruction of tunnel portion of side increases, in the process of coal column deformation damage, anchor-holding force of anchor bolt is easy to the forfeiture of decay, cause tunnel unstability, usually need to carry out a large amount of reprocessing and could meet the normal use of next work plane.
The patent that can retrieve in disclosed document has: " a kind of to drawing anchor cable " that application number is 200720131114.5, and application number be 201310014594.7 " method that between crossheading lane, a kind of many lanes, bog-head coal post is reinforced ".Above two patents all provide the method for controlling coal column between lane, but what the former provided is a kind of to drawing the elongation per unit length of anchor cable low (only having 3.5%), it is a kind of rigid protection, be difficult to adapt to the deformation behaviour of coal column, for example adopt 20m to drawing anchor cable, allow the ultimate deformation amount of coal column to only have 700mm, that is to say, when the deflection of coal column one side exceedes 350mm, anchor cable is easy to occur losing efficacy, obviously adopt being out of shape drawing anchor cable can not effectively control coal column of common steel strand manufacturing, coal column distortion is prone to and collapses when larger.The muscle material that penetrates coal column described in the latter can adopt reinforcing bar, also can adopt steel strand, the problem that adopts steel strand to exist is same as above, adopt reinforcing bar the length of reinforcing bar be subject to the restriction of lane space, when coal pillar width exceedes 4～5m, cannot use, range of application is subject to great restriction.
Summary of the invention
The invention provides the reinforcement means of coal column between a kind of stope drift active workings lane, can effectively solve coal column reinforcing technique existing problems between existing lane.
For solving the problems of the technologies described above, the invention provides the method that between a kind of stope drift active workings lane, coal column is reinforced, first adopt conventional anchor band net support reinforcement coal column, supporting parameter is determined according to actual conditions.Then at coal, help and hole and penetrate coal column, penetrate spreading anchor pole, in the both sides of spreading anchor pole, lay steel band or steel channel beam etc., and steel band or steel channel beam are pressed on the steel band of having constructed, net sheet, steel band are linked to be to an entirety tightly, to strengthen the table effect of protecting to coal column.At spreading anchor pole two ends, apply high pre-stress, make coal column in triaxial stress state, can effectively control coal column distortion early stage simultaneously.Because coal column will be subject to repeatedly dynamic pressure impact, occur that larger distortion is almost inevitably, adopt the high spreading anchor pole of elongation per unit length also can well adapt to coal column distortion, while guaranteeing coal column large deformation, be difficult for caving in.
Compared with the prior art, the invention has the beneficial effects as follows: adopt the spreading anchor pole of direct puncture coal column to carry out lock control to coal column, make coal column in triaxial stress state, can effectively control coal column distortion early stage.Spreading anchor pole can, according to any spreading of tunnel size, not limited by lane space simultaneously, and the width that adapts to coal column is large, applied range.With adopt drawing compared with anchor cable, the elongation per unit length of spreading anchor pole is high, can adapt to the deformation behaviour of coal column, guarantees to be difficult for caving in when large deformation appears in coal column, guarantees the safe and efficient production of stope.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is that schematic diagram is arranged in the typical many lanes of stope working surface of coal mines.
Fig. 2 is the support pattern schematic diagram of coal column between Fig. 1 inter-road.
Fig. 3 is the elevation of support pattern in Fig. 2.
Fig. 4 is the structural representation of spreading anchor pole in Fig. 2.
In figure: 1-stope drift active workings; Coal column between 2-lane; 3-common bolt; 4-spreading anchor pole; 5-steel band; 6-steel channel beam or steel band; 7-net sheet; The 8-body of rod; 9-linkage.
The specific embodiment
The invention provides the reinforcement means of coal column between a kind of stope drift active workings lane, because adopting many lanes, arranges stope, formed coal column between lane (2), first adopt conventional anchor band net support reinforcement coal column (2), then at coal, help and hole and penetrate coal column, penetrate spreading anchor pole (4), at the both sides of spreading anchor pole (4) laying groove girder steel or steel band (6), and steel band or steel channel beam are pressed on the steel band (5) of having constructed, net sheet (7), steel band (5) are linked to be to an entirety tightly, to strengthen the table effect of protecting to coal column.At spreading anchor pole (4) two ends, apply high pre-stress, make coal column in triaxial stress state, can effectively control coal column distortion early stage simultaneously.Because the elongation per unit length of spreading anchor pole is high, when larger distortion appears in later stage coal column, spreading anchor pole also can well adapt to coal column distortion, while guaranteeing coal column large deformation, is difficult for caving in.
In the present invention, the spreading anchor pole (4) adopting consists of the body of rod (8) and linkage (9), and the body of rod (8) can adopt anchor pole special screw thread steel, also can adopt building screw-thread steel or common round steel, the length of the body of rod (8) is determined according to coal pillar width and tunnel size, conventionally at 2～4m.The two ends of the body of rod (8) are provided with external screw thread, by the female linkage of a tool (9), the body of rod are coupled together, and the number of linkage (9) is determined according to the length of the width of coal column between lane (2) and the body of rod (8).Spreading anchor pole (4) only need insert boring while installing, and after both sides laying groove girder steels (6), carries out pretension, does not need to fill Anchor Agent, constructs very easy.
In the present invention, the common bolt (3) adopting is IV or the vertical muscle twisted steel anchor rod of the left-handed nothing of V level, and steel band (5) is W steel band, M steel band, also can be flat strip steel.Net sheet (7) is gauze wire cloth, steel mesh reinforcement, also can be plastic wire.
In the present invention, when later stage tunnel is subject to mining influence deflection larger, loose crushing in coal side certain limit, supporting capacity sharply reduces, and now tackles coal side and carries out slip casting to improve its load-carrying properties, can select chemical grout, also can adopt cement grout.
Based on noted earlier, when between lane during the wide 15m of coal column, can adopt the spreading anchor pole of 15.4m, spreading anchor pole is comprised of 4 sections of bodies of rod and 3 linkages, and the elongation of spreading anchor pole is more than 2500mm, overcome the low shortcoming of anchor cable elongation per unit length, and do not need to fill Anchor Agent, be convenient to realize Fast Installation, the initial stage can effectively be controlled coal column distortion between lane, later stage is difficult for caving in the time of guaranteeing coal column large deformation again, guarantees work plane safety and high efficiency.
Claims (4)
1. the method that between a stope drift active workings lane, coal column is reinforced, first adopt coal column between conventional anchor band net support reinforcement lane, then at coal, help and hole and penetrate coal column, penetrate spreading anchor pole, in the both sides of spreading anchor pole, lay steel band or steel channel beam, and steel band or steel channel beam are pressed on the steel band of having constructed, net sheet, steel band are linked to be to an entirety tightly, to strengthen the table effect of protecting to coal column, at spreading anchor pole two ends, apply high pre-stress simultaneously, make coal column in triaxial stress state, guarantee that coal column keeps stable at tunnel viability.
2. spreading anchor pole according to claim 1, it is characterized in that, by the body of rod and linkage, formed, the body of rod can adopt anchor pole special screw thread steel, also can adopt building screw-thread steel or common round steel, its length is determined according to coal pillar width and tunnel size, conventionally at 2～4m, the two ends of the body of rod are provided with external screw thread, by the female linkage of a tool, the body of rod is coupled together, the number of linkage is determined according to the length of the width of coal column between lane and the body of rod, during spreading rockbolt installation, only need insert boring, after the laying groove girder steel of both sides, after steel band, carry out pretension, do not need to fill Anchor Agent, be convenient to realize Fast Installation.
3. anchor band net according to claim 1 supporting, is characterized in that, anchor pole is the vertical muscle twisted steel anchor rod of IV or the left-handed nothing of V level, and steel band is W steel band, M steel band, also can be flat strip steel, and net sheet is gauze wire cloth, steel mesh reinforcement, also can be plastic wire.
4. coal column between lane according to claim 1, it is characterized in that, owing to will being subject to repeatedly mining influence, inevitably there will be larger distortion, cause loose crushing in coal side certain limit, supporting capacity sharply reduces, and now tackles coal side and carries out slip casting to improve its load-carrying properties, can select chemical grout, also can adopt cement grout.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310734661.2A CN103742171A (en) | 2013-12-27 | 2013-12-27 | Mining roadway coal pillar reinforcing method |
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| CN201310734661.2A CN103742171A (en) | 2013-12-27 | 2013-12-27 | Mining roadway coal pillar reinforcing method |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453944A (en) * | 2014-12-29 | 2015-03-25 | 山东科技大学 | Coal-pillar-impacting-preventing roadway protecting method |
| CN104847354A (en) * | 2015-04-03 | 2015-08-19 | 山东科技大学 | Method for improving performance of strip coal pillar by grouting combined support anchor rod |
| CN105804776A (en) * | 2016-03-15 | 2016-07-27 | 山东科技大学 | Opposite pulling type anchor rods for gob-side entrydriving small coal pillar and support method thereof |
| CN106150535A (en) * | 2016-07-02 | 2016-11-23 | 河南理工大学 | A kind of strip-type wangeviry mining method technology offset method for protecting support |
| CN106401604A (en) * | 2016-12-12 | 2017-02-15 | 煤炭科学技术研究院有限公司 | Method for strengthening large coal pillar low in intensity of fracture development |
| CN107060811A (en) * | 2017-06-20 | 2017-08-18 | 嘉兴学院 | The bracing means of thin coal pillar between a kind of tunnel |
| CN107060758A (en) * | 2017-04-18 | 2017-08-18 | 辽宁工程技术大学 | A kind of section fender, which is stayed, sets construction method |
| CN110486016A (en) * | 2019-08-16 | 2019-11-22 | 山东科技大学 | A method of improving strip coal pillar stability |
| CN110793851A (en) * | 2019-09-30 | 2020-02-14 | 中国矿业大学 | Mining steel belt bearing capacity testing device and testing method |
| CN113685182A (en) * | 2021-08-10 | 2021-11-23 | 中国矿业大学 | Reuse method of retained anchor rods in gob-side entry driving coal pillar |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340254A (en) * | 1979-02-14 | 1982-07-20 | Tatabanyai Szenbanyak | Method of mining heavy coal seams in two or more benches |
| RU2193664C2 (en) * | 2000-10-04 | 2002-11-27 | ОАО "Кузнецкий научно-исследовательский угольный институт" | Method of supporting mine workings junction |
| CN201121521Y (en) * | 2007-11-30 | 2008-09-24 | 中国矿业大学 | Opposite pull anchor wire |
| CN201753610U (en) * | 2009-09-10 | 2011-03-02 | 中国科学院水利部成都山地灾害与环境研究所 | Connecting anchor bolt |
| CN201835847U (en) * | 2010-10-25 | 2011-05-18 | 中国矿业大学(北京) | Ultralong anchor rod |
| CN103089279A (en) * | 2013-01-15 | 2013-05-08 | 河南理工大学 | Multi-lane along-groove inter-lane thin coal pillar reinforcing method |
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2013
- 2013-12-27 CN CN201310734661.2A patent/CN103742171A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4340254A (en) * | 1979-02-14 | 1982-07-20 | Tatabanyai Szenbanyak | Method of mining heavy coal seams in two or more benches |
| RU2193664C2 (en) * | 2000-10-04 | 2002-11-27 | ОАО "Кузнецкий научно-исследовательский угольный институт" | Method of supporting mine workings junction |
| CN201121521Y (en) * | 2007-11-30 | 2008-09-24 | 中国矿业大学 | Opposite pull anchor wire |
| CN201753610U (en) * | 2009-09-10 | 2011-03-02 | 中国科学院水利部成都山地灾害与环境研究所 | Connecting anchor bolt |
| CN201835847U (en) * | 2010-10-25 | 2011-05-18 | 中国矿业大学(北京) | Ultralong anchor rod |
| CN103089279A (en) * | 2013-01-15 | 2013-05-08 | 河南理工大学 | Multi-lane along-groove inter-lane thin coal pillar reinforcing method |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104453944A (en) * | 2014-12-29 | 2015-03-25 | 山东科技大学 | Coal-pillar-impacting-preventing roadway protecting method |
| CN104847354A (en) * | 2015-04-03 | 2015-08-19 | 山东科技大学 | Method for improving performance of strip coal pillar by grouting combined support anchor rod |
| CN104847354B (en) * | 2015-04-03 | 2018-02-02 | 山东科技大学 | A kind of method that strip coal pillar performance is lifted using slip casting combined supporting anchor pole |
| CN105804776A (en) * | 2016-03-15 | 2016-07-27 | 山东科技大学 | Opposite pulling type anchor rods for gob-side entrydriving small coal pillar and support method thereof |
| CN105804776B (en) * | 2016-03-15 | 2017-11-10 | 山东科技大学 | For gob side entry driving fender to pull-type anchor pole and its method for protecting support |
| CN106150535A (en) * | 2016-07-02 | 2016-11-23 | 河南理工大学 | A kind of strip-type wangeviry mining method technology offset method for protecting support |
| CN106401604A (en) * | 2016-12-12 | 2017-02-15 | 煤炭科学技术研究院有限公司 | Method for strengthening large coal pillar low in intensity of fracture development |
| CN107060758A (en) * | 2017-04-18 | 2017-08-18 | 辽宁工程技术大学 | A kind of section fender, which is stayed, sets construction method |
| CN107060811A (en) * | 2017-06-20 | 2017-08-18 | 嘉兴学院 | The bracing means of thin coal pillar between a kind of tunnel |
| CN110486016A (en) * | 2019-08-16 | 2019-11-22 | 山东科技大学 | A method of improving strip coal pillar stability |
| CN110793851A (en) * | 2019-09-30 | 2020-02-14 | 中国矿业大学 | Mining steel belt bearing capacity testing device and testing method |
| CN113685182A (en) * | 2021-08-10 | 2021-11-23 | 中国矿业大学 | Reuse method of retained anchor rods in gob-side entry driving coal pillar |
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Application publication date: 20140423 |