CN101806223B - Method for reinforcing return channel - Google Patents
Method for reinforcing return channel Download PDFInfo
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- CN101806223B CN101806223B CN 200910078133 CN200910078133A CN101806223B CN 101806223 B CN101806223 B CN 101806223B CN 200910078133 CN200910078133 CN 200910078133 CN 200910078133 A CN200910078133 A CN 200910078133A CN 101806223 B CN101806223 B CN 101806223B
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- return channel
- top board
- rice
- anchor
- roof
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- 238000000034 method Methods 0.000 title abstract description 11
- 230000003014 reinforcing effect Effects 0.000 title abstract 3
- 230000002787 reinforcement Effects 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 241000209094 Oryza Species 0.000 claims description 19
- 235000007164 Oryza sativa Nutrition 0.000 claims description 19
- 235000009566 rice Nutrition 0.000 claims description 19
- 238000007569 slipcasting Methods 0.000 claims description 19
- 239000011347 resin Substances 0.000 claims description 10
- 229920005989 resin Polymers 0.000 claims description 10
- 230000006641 stabilisation Effects 0.000 claims description 7
- 238000011105 stabilization Methods 0.000 claims description 7
- 201000010041 presbyopia Diseases 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 230000000694 effects Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 10
- 230000008901 benefit Effects 0.000 abstract description 4
- 229910001294 Reinforcing steel Inorganic materials 0.000 abstract 1
- 238000010276 construction Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 3
- 241001347978 Major minor Species 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 229910021532 Calcite Inorganic materials 0.000 description 1
- 235000015076 Shorea robusta Nutrition 0.000 description 1
- 244000166071 Shorea robusta Species 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000012459 cleaning agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
Abstract
The invention relates to a method for reinforcing a return channel. The method comprises the following steps: (1) supporting a roof by utilizing anchor stocks, anchor cables, mesh reinforcements, steel beams, single struts and double-row cribworks jointly; and (2) and injecting Marithan into the roof to solidify the roof. By utilizing the anchor stock-anchor cable-mesh reinforcement-steel beam-single strut-double row cribwork joint support mode, the invention reasonably optimizes the support parameters, thereby ensuring the support strength of the return channel; and by using the Marithan product, the invention effectively enhances the support strength of the coal body, thereby achieving the goal of reinforcing the treated region. The method of the invention greatly ensures the safety and enhances the economic benefit. In addition, the invention has the advantages of simple process, convenient operation and low requirements for on-site construction, and can quickly and efficiently reinforce the roof and effectively support the roof.
Description
Technical field
The present invention relates to the reinforcement means of return channel, especially the reinforcement means of fully-mechanized mining working return channel in the progress of coal mining.
Background technology
For downhole coal mine (non-open coal mine), if the stratum in colliery is layer structure, and be take soft stratum as main, it is high so usually can to run into the rock shale content, the problem of many shales and calcite cementation.That is to say that roof strata is take fine sandstone, siltstone as main, may there be Sandy Silt the part, and floor strata is then take Sandy Silt as main.
Top under the above-mentioned geological conditions, floor strata itself be very easily detrition, and this has aggravated again the unstability of top, floor strata.Cash, crack, absciss layer sinkage may appear falling in the impact of particularly being exploited, tunnel part top board, and roof fall occurs when serious.Particularly, in the prior art, fully-mechanized mining working is adopted when stopping adopting line, and Tunnel Pressure increases, the whole sinking of return channel, roof cracking, the roof fall wall caving is serious, the equipment returning difficulty, the consumption of the support materials such as timber is multiplied, the Efficiency Decreasing of face is fallen in removal of home, causes equipment to kill, can't withdraw when serious, and on the safety also without guarantee.
Therefore be necessary to invent a kind of reinforcement means of return channel to overcome defects in fact.
Summary of the invention
The object of the invention is to, invent a kind of return channel reinforcement means that is applicable to the soft stratum geological conditions, the equipment that withdraws and personnel that the method can be simple, efficient, safe.
In order to achieve the above object, the reinforcement means of return channel of the present invention is such:
A kind of reinforcement means of return channel, wherein, step 1 is used anchor pole, anchor cable, steel mesh reinforcement, girder steel, individual prop, double brettis combined supporting top board; Step 2 is injected the loose top board that solidifies of Mary in top board.
As preferred embodiment, described step 1 is divided into following 3 sub-steps:
Step 1a, anchor pole, anchor cable acting in conjunction form certain active force with supporting roof;
Step 1b directly is fixed on steel mesh reinforcement on the top board by anchor pole, anchor cable, by the fixing supporting that forms top board of three's acting in conjunction;
Step 1c is with individual prop and the brettis common supporting roof that combines with girder steel.
As preferred embodiment, described step 2 is divided into following 4 sub-steps:
Step 2a according to the designing requirement of position, hole, punches at the need stabilization zone;
Step 2b assembles multifunction pump and annex thereof, and carries out slip casting with multifunction pump;
Step 2c stops slip casting after reaching default slip casting ratio and grouting pressure in the hole;
Step 2d changes hole slip casting, and repeating step 2c is complete to slip casting.
As preferred embodiment, the slip casting ratio of described step 2c is the volumetric mixture ratio 1: 1 of the loose resin of Mary and catalyzer.
As preferred embodiment, the grouting pressure of described step 2c is 12-20MPa.
As preferred embodiment, the need stabilization zone of described step 2a comprises inlet well district, connection trigonum, lane, return channel district, wherein: the aperture 35-45mm in inlet well district, hole sealing depth 0.8-1.2m; The boring of connection trigonum, lane is five presbyopia and arranges pitch-row 1.8-2.2 rice, array pitch 1.2-1.7 rice, hole depth 4.5-5.5 rice; The boring in return channel district is single row of holes arranges, pitch-row 2.8-3.3 rice, and hole depth 5.4-6.5 rice, the aperture is apart from top board 0.4-0.6 rice.
As preferred embodiment, the need stabilization zone of described step 2a comprises inlet well district, connection trigonum, lane, return channel district, and wherein: the aperture in inlet well district is 42 millimeters, and hole sealing depth is 1 meter; The boring of connection trigonum, lane is five presbyopia and arranges that pitch-row is 2 meters, 1.5 meters of array pitch, 5 meters of hole depths; The boring in return channel district is single row of holes arranges, 3 meters of pitch-rows, and 5 meters of hole depths, the aperture is apart from 0.5 meter on top board.
The reinforcement means of return channel of the present invention is by adopting anchor pole-anchor cable-steel mesh reinforcement-girder steel-individual prop-double brettis combined supporting mode, and the reasonably optimizing supporting parameter can guarantee the supporting intensity of return channel; By using Mary's lively stock effectively to increase the support strength of coal body, reach the purpose in consolidation process zone.On the reinforcement means safety of the present invention great assurance has been arranged, also be improved on the economic benefit.Also to have technique simple, easy to operate in the present invention in addition, and site operation is less demanding, can reach fast and efficiently the advantage of Strengthening Roof and effective support.
The specific embodiment
Following embodiment will adopt more representational coal seam conditions (3.2 meters-5 meters of coal seam thicknesses, face length is at 180 meters-300 meters, about 150 meters of coal seam buried depth, the return channel section is 5.2 meters * 3.6 meters, other has three and withdraws the connection lane) be explained, it will be understood by those skilled in the art that method of the present invention is not limited in this kind coal seam conditions, in order to adapt to the different conditions such as coal seam thickness, the specification of the support material of employing or spacing etc. can be done suitable adjustment.The below describes the reinforcement means of return channel of the present invention in detail.
The reinforcement means of return channel of the present invention adopts anchor pole-anchor cable-net sheet-girder steel-double brettis combined supporting, and the mode that is aided with simultaneously the loose reinforcement material of Mary is reinforced.
1. anchor pole-anchor cable-steel mesh reinforcement-girder steel-individual prop-double brettis combined supporting
Adopt " anchor pole linked network associating anchor cable " supporting at major-minor return channel, the anchor pole specification is ￠ 16 * 2000mm, array pitch 800 * 800mm, and three figured cloths are put, and two to help an array pitch be 1200 * 800mm, and three figured cloths are put.It will be understood by those skilled in the art that here between array pitch refer between the roofbolt between array pitch, two help an array pitch refer to two of tunnel help the anchor pole of beating between array pitch.Use simultaneously girder steel that top board is carried out supporting, described girder steel is No. 11 " worker " word steel.To be anchorage head directly be anchored at a kind of method with supporting roof in the top board by resin for anchor pole, anchor cable, girder steel withstands on " worker " word steel on the top board by individual prop exactly, form certain active force with supporting roof, it and anchor pole, anchor cable acting in conjunction form the supporting to top board, and they are that acting in conjunction is to the supporting of top board
The anchor cable specification is ￠ 15.24 * 6500mm resin anchor cable, and array pitch is 1800 * 1500mm between main return channel, and array pitch is 1800 * 2000mm between auxiliary return channel; Major-minor return channel, connection lane, reversing chamber are laid the thick concrete of 200mm, and the cement grade of employing is C25.
The steel mesh reinforcement specification is 2500 * 1700mm, with the reinforcement fabrication (" ￠ " represents diameter) of ￠ 6.5, grid specification 140 * 140mm, lap width is more than or equal to 100mm between the net sheet of steel mesh reinforcement and the net sheet, lap-joint wears extremely with anchor pole, and net oblique cut grafting place bundlees with iron wire every 300mm in addition.Described steel mesh reinforcement directly is fixed on the top board by anchor pole, anchor cable.
In addition, the brettis of the double 10000KN of interlaced arrangement in main return channel.Like this, anchor pole, anchor cable acting in conjunction form certain active force with supporting roof, reinforced mesh is by the fixing supporting that forms top board of anchor pole, anchor cable acting in conjunction, girder steel be by individual prop and the supporting of brettis direct effect on top board, form omnibearing three-dimensional supporting.
2. in top board, inject the loose top board that solidifies of Mary
(1). according to the designing requirement of position, hole, in the punching of need stabilization zone, the described stabilization zone that needs comprises inlet well district, connection trigonum, lane, return channel district.
A, inlet well district: the about 35-45mm in aperture, preferred 42mm, hole sealing depth 0.8-1.2m, preferred 1m;
B, connection trigonum, lane: the boring on the top board is five presbyopia and arranges pitch-row 1.8-2.2 rice, preferred 2 meters; Array pitch 1.2-1.7 rice, preferred 1.5 meters; Hole depth 4.5-5.5 rice, preferred 5 meters;
C, return channel district: boring is single row of holes and arranges pitch-row 2.8-3.3 rice, preferred 3 meters; Hole depth 5.4-6.5 rice, preferred 6 meters; The aperture is apart from top board 0.4-0.6 rice, preferred 0.5 meter.
(2). multifunction pump and enclosure group thereof are installed also slip casting;
(3). note to observe slip casting ratio and grouting pressure, after described slip casting ratio and grouting pressure reach preset value, stop slip casting, with the loose resin sluicing line road of Mary and hybrid gun.It will be appreciated by those skilled in the art that, two kinds of used chemical materials are respectively the loose resin of Mary and catalyzer during slip casting, wherein the volume mixture ratio of the loose resin of Mary and catalyzer is 1: 1, and it is best to be roughly the 12-20MPa effect according to the roof condition grouting pressure, wherein best results during 16MPa.Here the purpose that adds catalyzer is to accelerate setting rate; After the loose resin of Mary and catalyzer entered the stratum with 1: 1 volume ratio hybrid injection, low viscous Mary is loose, and resin penetrated into microscopic checks, can freezing by expansion and bonding consolidation process zone.
(4). change hole slip casting, repeating step (3);
(5). slip casting is complete rear with cleaning agent cleaning multifunction pump and annex.
Method technique of the present invention is simple, easy to operate, and site operation is less demanding, can reach fast and efficiently the purpose of Strengthening Roof and effective support.
The present invention is described in detail in conjunction with its specific embodiment; and above-described embodiment is only for explanation the present invention's; and be not to be limitation of the present invention; the those of ordinary skill in relevant technologies field; in the situation that does not break away from the open scope of the present invention; can also make a variety of changes and modification, so all technical schemes that are equal to, comprise the change that all do not deviate from spirit and scope of the invention and revise all within the scope of protection of the invention.
Claims (5)
1. the reinforcement means of a return channel is characterized in that:
Step 1 is used anchor pole, anchor cable, steel mesh reinforcement, girder steel, individual prop, double brettis combined supporting top board, and the anchor pole specification is C16x2000mm, an array pitch 800x800mm, and three figured cloths are put, and two to help an array pitch be 1200x 800mm, and three figured cloths are put; The anchor cable specification is C 15.24x6500mm resin anchor cable, and array pitch is 1800x 1500mm between main return channel, and array pitch is 1800x 2000mm between auxiliary return channel; Described steel mesh reinforcement specification is 2500x 1700mm, reinforcement fabrication with C6.5, grid specification 140x140mm, lap width is more than or equal to 100mm between the net sheet of steel mesh reinforcement and the net sheet, lap-joint wears extremely with anchor pole, net oblique cut grafting place bundlees with iron wire every 300mm, and described steel mesh reinforcement directly is fixed on the top board by anchor pole, anchor cable; The brettis of the double 10000KN of interlaced arrangement in main return channel; Girder steel by individual prop and the supporting of brettis direct effect on top board;
Step 2 is injected the loose top board that solidifies of Mary in top board, described step 2 is divided into following 4 sub-steps:
Step 2a according to the designing requirement of position, hole, punches at the need stabilization zone;
Step 2b assembles multifunction pump and annex thereof, and carries out slip casting with multifunction pump;
Step 2c stops slip casting after reaching default slip casting ratio and grouting pressure in the hole;
Step 2d changes hole slip casting, and repeating step 2c is complete to slip casting,
The need stabilization zone of described step 2a comprises inlet well district, connection trigonum, lane, return channel district, wherein: the aperture 35-45 millimeter in inlet well district, hole sealing depth 0.8-1.2 rice; The boring of connection trigonum, lane is five presbyopia and arranges pitch-row 1.8-2.2 rice, array pitch 1.2-1.7 rice, hole depth 4.5-5.5 rice; The boring in return channel district is single row of holes arranges, pitch-row 2.8-3.3 rice, and hole depth 5.4-6.5 rice, the aperture is apart from top board 0.4-0.6 rice.
2. the reinforcement means of return channel according to claim 1 is characterized in that, described step 1 is divided into following 3 sub-steps:
Step 1a, anchor pole, anchor cable acting in conjunction form certain active force with supporting roof;
Step 1b directly is fixed on steel mesh reinforcement on the top board by anchor pole, anchor cable, by the fixing supporting that forms top board of three's acting in conjunction;
Step 1c is with individual prop and the brettis common supporting roof that combines with girder steel.
3. the reinforcement means of return channel according to claim 1 is characterized in that, the slip casting ratio of described step 2c is the volumetric mixture ratio 1:1 of the loose resin of Mary and catalyzer.
4. the reinforcement means of return channel according to claim 1 is characterized in that, the grouting pressure of described step 2c is 12-20MPa.
5. the reinforcement means of return channel according to claim 1 is characterized in that, the aperture in inlet well district is 42 millimeters, and hole sealing depth is 1 meter; The boring of connection trigonum, lane is five presbyopia and arranges that pitch-row is 2 meters, 1.5 meters of array pitch, 5 meters of hole depths; The boring in return channel district is single row of holes arranges, 3 meters of pitch-rows, and 5 meters of hole depths, the aperture is apart from 0.5 meter on top board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910078133 CN101806223B (en) | 2009-02-17 | 2009-02-17 | Method for reinforcing return channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910078133 CN101806223B (en) | 2009-02-17 | 2009-02-17 | Method for reinforcing return channel |
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| CN101806223A CN101806223A (en) | 2010-08-18 |
| CN101806223B true CN101806223B (en) | 2013-04-03 |
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| CN 200910078133 Active CN101806223B (en) | 2009-02-17 | 2009-02-17 | Method for reinforcing return channel |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104763425B (en) * | 2015-02-03 | 2017-01-25 | 杨洪兴 | Pressure relief presplitting blasting gob-side entry retaining pillar-free mining method |
| CN107060760A (en) * | 2017-06-13 | 2017-08-18 | 中国矿业大学 | A kind of method that colliery withdraws tunnel presplit blasting caving release |
| CN110080678A (en) * | 2019-04-19 | 2019-08-02 | 徐建忠 | A kind of coal and rock high molecular material consolidation grouting perforating arrangement method |
| CN110700867A (en) * | 2019-10-30 | 2020-01-17 | 神华神东煤炭集团有限责任公司 | Roof support method |
| CN110821537B (en) * | 2019-11-29 | 2021-02-09 | 淮矿西部煤矿投资管理有限公司 | Support method for fully-mechanized coal mining face pre-digging single-withdrawing channel |
| CN111720165A (en) * | 2020-06-28 | 2020-09-29 | 重庆大学 | Large-dip-angle coal seam gob-side entry retaining flexible entry protection method |
| CN112879008B (en) * | 2021-01-26 | 2022-03-15 | 中国矿业大学 | Support system and support method suitable for self-tunneling type retraction process |
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| CN101067376A (en) * | 2007-06-07 | 2007-11-07 | 中国矿业大学(北京) | Fissure rock grouting reinforcement experimental instrument and experimental method thereof |
| CN101245600A (en) * | 2008-02-28 | 2008-08-20 | 上海市第二市政工程有限公司 | Construction method for generating horizontal reinforcing body by high-pressure-double-liquid rotary spray technique |
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2009
- 2009-02-17 CN CN 200910078133 patent/CN101806223B/en active Active
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|---|---|---|---|---|
| DE19925730C1 (en) * | 1999-06-07 | 2001-01-11 | Schmidt & Co Gmbh Kranz | Pressure drill rod for pressure drilling plant uses hollow drill rod elements for providing light path between target light at drill head and camera at drilling drive end enclosed by fluid channel supplying fluid jets |
| CN1693670A (en) * | 2005-05-19 | 2005-11-09 | 中国矿业大学 | Three-anchor coupling supporting method for high stress tunnel break wall rock |
| CN101067376A (en) * | 2007-06-07 | 2007-11-07 | 中国矿业大学(北京) | Fissure rock grouting reinforcement experimental instrument and experimental method thereof |
| CN101245600A (en) * | 2008-02-28 | 2008-08-20 | 上海市第二市政工程有限公司 | Construction method for generating horizontal reinforcing body by high-pressure-double-liquid rotary spray technique |
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| 邵力.补连塔煤矿31401工作面特殊的贯通过程.《山西煤炭》.2008,第28卷(第3期),第2、5部分. * |
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| CN101806223A (en) | 2010-08-18 |
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