CN102720498B - Gob-side entry retaining mining process for coal face - Google Patents
Gob-side entry retaining mining process for coal face Download PDFInfo
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- CN102720498B CN102720498B CN201210204433.XA CN201210204433A CN102720498B CN 102720498 B CN102720498 B CN 102720498B CN 201210204433 A CN201210204433 A CN 201210204433A CN 102720498 B CN102720498 B CN 102720498B
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Abstract
The invention discloses a gob-side entry retaining mining process for a coal face. The method comprises the following steps of: firstly performing temporary support on a top plate by supporting with two rows of hydraulic single support columns on the side of the designed entry retaining region beside the transport lane after the lower end of the coal face is pushed with one cycle during progress of the coal face; then performing normal support on the top plate by arranging a row of reinforcing anchor cables on the top plate of the original laneway in the position 0.3 meters from the support wall and arranging a row of steel pipe-concrete support columns on the top plate of the original laneway in the position 0.6 meters from the base plate of the original laneway; and finally performing support on a lateral wall shield lane by protecting the lane with reinforcement meshes in combination with woven bags loading gangue and then stacking gangue bags and finally injecting a concrete coating to cover the reinforcement meshes. The method fills in the blank of lane side-wall support and shield lane in the prior art, reduces the support cost, increases the support strength, greatly increases the construction speed, has a simple process and a significant effect, and effectively reduces the ten thousand ton-level drivage ratio.
Description
Technical field
The present invention relates to coal-mining technique field, be applicable to the above roof condition of moderate stable, low gaseous mine, without bump and area of stress concentration structure, nearly level and gently inclined thin seam and medium-thickness seam fully-mechanized mining working.
Background technology
During coal mine fully-mechanized mining working exploitation, be reduce the loss of coal column, spread gob side entry retaining production practice.
At present, gob side entry retaining production practice technology mainly contains following several:
Build waste pack by laying bricks or stones, install close standing props or grillage, add the metallic support in Guyuan tunnel, adopt and have mould or without mould filling technique.Several technology all has the following disadvantages above.
1. build waste pack technique by laying bricks or stones: support ability in advance, easily cause the excessive sinking of top board to cause back to fracture, finally cause staying lane failure.
2. pillar or crib protection: support material uses many, workload is large, supporting and protect lane weak effect.
3. add the metallic support in Guyuan tunnel: complicated construction technique, poor stability, repeatedly support top board, cause roof break, fragmentation, it is poor to protect lane effect.
4. cement or other materials filling process: complex process, equipment investment is large, and filler cost is higher.
Therefore, how to realize high strength, low cost, simple to operate, protect the tight edge air gallery technology in lane and remain a great problem in coal mining.
Summary of the invention
The present invention, for overcoming the deficiencies in the prior art, proposes a kind of new Retaining Roadways Along Goaf at Coal Face production practice method.
Technical scheme is as follows:
The first step: top board temporary lining
Along with the propelling of work plane, after work plane lower end advances a circulation, at the goaf side that the transportation roadway lane of design is other, carry out supporting with two row's hydraulic single props, two row's hydraulic single props wear footwear, prop up and are located on floor undulation rock; By the first row pillar post distance 0.8 meter of goaf side; Second row individual prop arranges metal roof bar, post distance 1 meter, array pitch 0.5 meter; Two row's hydraulic single props are with strengthening cap supporting, and cap adopts the plank that 15-30cm is thick; According to Roof rock feature, before work plane first weighting, temporary lining length gets 50 meters, after first weighting, and temporary lining distance gets 30 meters; Two row's individual props will be in line layouts, and the two prop setting angle degree arranging individual props are 3-4 °;
3rd step: the regular supporting of top board
The top board in former tunnel arranges reinforcement anchor cable, anchor cable specification φ 17.8 × 6200mm, spacing 3-4 rice apart from support wall 0.3 meter of layout one, then apart from former roadway floor 0.6 meter of layout one row steel tube concrete pillar, post distance 1.0 meters; Described concrete filled steel tube pillar: be at seamless steel pipe, pours into C40 concrete, requires that yield strength is greater than 236N/mm
2, thickness of steel pipe is not less than 4mm, the ratio 65-70 of outer diameter of steel pipes and wall thickness, and slenderness ratio is not more than 20;
3rd step: lateral wall protects lane mode
Steel mesh reinforcement is adopted to coordinate knitting bagged spoil to protect lane, i.e. steel mesh reinforcement on the outside of concrete filled steel tube pillar is fixing, steel mesh reinforcement adopts φ 6mm welded steel fabric, mesh 100 × 100mm, then stacking spoil bag, spoil bag stacking bottom width 1.5 meters, top width 1 meter, spoil bag loads onto spoil with Nylon Bag in down-hole to form; For preventing goaf air leaking, steel mesh reinforcement spraying a layer concrete again and covers.
The invention solves gob side entry retaining traditional handicraft at roadside support and protect the technical shortcoming in lane, decrease support cost, improve supporting intensity, substantially increase speed of application, technique is simple, Be very effective, effectively reduce ten thousand tons of drivage ratios, shorten work plane time, stopped protection pillar loss, improve the safe coefficient in resource recovery and colliery.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the embodiment of the present invention.
Detailed description of the invention
Specific embodiment of the invention is as described in summary of the invention, and those skilled in the art can implement completely according to the record of Fig. 1 and manual, are not described in detail in this.
Claims (1)
1. a Retaining Roadways Along Goaf at Coal Face production practice method, is characterized in that, step is as follows:
The first step: top board temporary lining
Along with the propelling of work plane, after work plane lower end advances a circulation, at the goaf side that the transportation roadway lane of design is other, carry out supporting with two row's hydraulic single props, two row's hydraulic single props wear footwear, prop up and are located on floor undulation rock; By the first row hydraulic single prop post distance 0.8 meter of goaf side; Second row hydraulic single prop arranges metal roof bar, post distance 1 meter, array pitch 0.5 meter; Two row's hydraulic single props are with strengthening cap supporting, and strengthening cap adopts the plank that 15-30cm is thick; According to Roof rock feature, before work plane first weighting, temporary lining length gets 50 meters, after first weighting, and temporary lining distance gets 30 meters; Two row's hydraulic single props will be in line layouts, and the two prop setting angle degree arranging hydraulic single props are 3-4 °;
Second step: the regular supporting of top board
The top board in former tunnel arranges reinforcement anchor cable, anchor cable specification φ 17.8 × 6200mm, spacing 3-4 rice apart from support wall 0.3 meter of layout one, then apart from former roadway floor 0.6 meter of layout one row steel tube concrete pillar, post distance 1.0 meters; Described concrete filled steel tube pillar: be at seamless steel pipe, pour into C
40concrete, requires that yield strength is greater than 236N/mm
2, thickness of steel pipe is not less than 4mm, and outer diameter of steel pipes is 65-70 with the ratio of wall thickness, and slenderness ratio is not more than 20;
3rd step: lateral wall protects lane mode
Steel mesh reinforcement is adopted to coordinate the packed spoil of nylon to protect lane, i.e. steel mesh reinforcement on the outside of concrete filled steel tube pillar is fixing, steel mesh reinforcement adopts φ 6mm welded steel fabric, mesh 100 × 100mm, then stacking spoil bag, spoil bag stacking bottom width 1.5 meters, top width 1 meter, spoil bag loads onto spoil with Nylon Bag in down-hole to form; For preventing goaf air leaking, steel mesh reinforcement spraying a layer concrete again and covers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210204433.XA CN102720498B (en) | 2012-06-20 | 2012-06-20 | Gob-side entry retaining mining process for coal face |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210204433.XA CN102720498B (en) | 2012-06-20 | 2012-06-20 | Gob-side entry retaining mining process for coal face |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102720498A CN102720498A (en) | 2012-10-10 |
| CN102720498B true CN102720498B (en) | 2015-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210204433.XA Expired - Fee Related CN102720498B (en) | 2012-06-20 | 2012-06-20 | Gob-side entry retaining mining process for coal face |
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Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103161467B (en) * | 2013-02-25 | 2014-06-18 | 湖北杉树垭矿业科技开发有限公司 | Horizontal moderately thick mine body compartment type filling mining method |
| CN103397905A (en) * | 2013-04-17 | 2013-11-20 | 唐建新 | System and method for achieving natural striding, falling and filling of coal beds, flexible roadway protection and complete gob-side entry retaining |
| CN103291319B (en) * | 2013-05-20 | 2015-06-24 | 山东科技大学 | Rigid-flexible combination gob-side entry retaining method and rigid-flexible combination gob-side entry retaining device by aid of roadside supports |
| CN103470286A (en) * | 2013-09-25 | 2013-12-25 | 四川省煤炭产业集团有限责任公司 | Gob-side entry retaining method realizing support by intercepting self-slip gangue through strip reinforcing steel bar mesh |
| CN103758529A (en) * | 2013-12-28 | 2014-04-30 | 北京昊华能源股份有限公司 | Coal mine gob-side entry retaining side supporting method |
| CN104061001B (en) * | 2014-06-25 | 2016-09-07 | 枣庄矿业（集团）有限责任公司滨湖煤矿 | Gob side entry retaining exploitation support process method |
| CN104500071B (en) * | 2014-12-16 | 2016-09-28 | 河南理工大学 | Seam mining avoids the gob-side entry retaining method of dynamic pressure impact |
| CN104832188B (en) * | 2015-04-17 | 2017-02-01 | 中国矿业大学(北京) | Concrete filled steel tube roadside support system used for large-section gob-side entry retaining and support method thereof |
| CN107091091A (en) * | 2017-07-03 | 2017-08-25 | 湖南科技大学 | A kind of steeply-inclined seam mining gob-side entry retaining method of prefabricated arc support |
| CN108194141B (en) * | 2017-12-28 | 2019-03-29 | 乌海市天裕工贸有限公司 | Mouth block wall under a kind of coal mine offset |
Citations (7)
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|---|---|---|---|---|
| RU2101501C1 (en) * | 1996-06-06 | 1998-01-10 | Сибирская государственная горно-металлургическая академия | Method of preservation of mine working |
| CN101503959A (en) * | 2008-11-26 | 2009-08-12 | 枣庄矿业（集团）有限责任公司滨湖煤矿 | Gob-side entry retaining support method |
| CN101864987A (en) * | 2010-06-13 | 2010-10-20 | 中国矿业大学 | Building method of filled wall body for gob-side entry retaining of large-inclination coal seam |
| CN101892860A (en) * | 2010-06-05 | 2010-11-24 | 中国矿业大学 | Method for entry retaining for walling at sides of road in steel cylinder support mode |
| CN101922292A (en) * | 2010-02-04 | 2010-12-22 | 成云海 | Coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application |
| CN102278140A (en) * | 2011-07-05 | 2011-12-14 | 徐州贝壳迈宁矿业科技有限公司 | Gob-side entry retaining method for solid filling coal mining building gangue wall |
| CN102425454A (en) * | 2011-09-22 | 2012-04-25 | 中国矿业大学 | Construction method of walling and filling combined gob-side entry retaining wall body |
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2012
- 2012-06-20 CN CN201210204433.XA patent/CN102720498B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2101501C1 (en) * | 1996-06-06 | 1998-01-10 | Сибирская государственная горно-металлургическая академия | Method of preservation of mine working |
| CN101503959A (en) * | 2008-11-26 | 2009-08-12 | 枣庄矿业（集团）有限责任公司滨湖煤矿 | Gob-side entry retaining support method |
| CN101922292A (en) * | 2010-02-04 | 2010-12-22 | 成云海 | Coal mine gob-side entry retaining roadside segment bearing unequal strength support principle and application |
| CN101892860A (en) * | 2010-06-05 | 2010-11-24 | 中国矿业大学 | Method for entry retaining for walling at sides of road in steel cylinder support mode |
| CN101864987A (en) * | 2010-06-13 | 2010-10-20 | 中国矿业大学 | Building method of filled wall body for gob-side entry retaining of large-inclination coal seam |
| CN102278140A (en) * | 2011-07-05 | 2011-12-14 | 徐州贝壳迈宁矿业科技有限公司 | Gob-side entry retaining method for solid filling coal mining building gangue wall |
| CN102425454A (en) * | 2011-09-22 | 2012-04-25 | 中国矿业大学 | Construction method of walling and filling combined gob-side entry retaining wall body |
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| CN102720498A (en) | 2012-10-10 |
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