CN104295315A - Low coal seam gob-side entry retaining method - Google Patents
Low coal seam gob-side entry retaining method Download PDFInfo
- Publication number
- CN104295315A CN104295315A CN201410401702.0A CN201410401702A CN104295315A CN 104295315 A CN104295315 A CN 104295315A CN 201410401702 A CN201410401702 A CN 201410401702A CN 104295315 A CN104295315 A CN 104295315A
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- Prior art keywords
- gob
- side entry
- entry retaining
- bastard coal
- woven bag
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- 239000003245 coal Substances 0.000 title claims abstract description 58
- 238000000034 method Methods 0.000 title claims abstract description 44
- 239000004568 cement Substances 0.000 claims abstract description 28
- 239000004575 stone Substances 0.000 claims abstract description 12
- 239000011435 rock Substances 0.000 claims abstract description 5
- 239000002893 slag Substances 0.000 claims description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 230000008093 supporting effect Effects 0.000 claims description 9
- 238000010276 construction Methods 0.000 abstract description 10
- 238000005065 mining Methods 0.000 abstract description 6
- 238000011084 recovery Methods 0.000 abstract description 4
- 230000003044 adaptive effect Effects 0.000 abstract description 2
- 238000009423 ventilation Methods 0.000 abstract description 2
- 239000003818 cinder Substances 0.000 abstract 2
- 239000000463 material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002955 isolation Methods 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000009940 knitting Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 208000009146 rhinoscleroma Diseases 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- 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
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a coal mining roadway gob-side entry retaining method and provides a low coal seam gob-side entry retaining method which is low in cost, high in safety, high in mining rate, low in labor intensity, convenient to construct and capable of being adaptive to coal seam thickness and dip angle changing. The method is called a cement coal and rock cinder stone wall and woven bag wall gob-side entry retaining method. According to the method, two-time gob-side entry retaining construction is carried out, cement rock cinder stone wall building method is used for first-time gob-side entry retaining, and a woven bag wall method is used for second-time gob-side entry retaining. A woven bag wall can well prevent gas in a gob from flowing into a reserved roadway in a controlling mode, the roadway which can meet a ventilation requirement is formed, by post-mining gob-side entry retaining, the advancing work amount can be lowered, cost can be lowered, labor intensity can be lowered, and the coal recovery rate can be improved.
Description
Technical field
The present invention relates to a kind of coal mining tunnel gob-side entry retaining method, particularly a kind of gob-side entry retaining method of girdle.
Background technology
In order to reclaim the safety pillar staying in traditional mining mode mode and establish, adopt certain technological means the crossheading of a upper section again supporting to be left for next section to use, this way in lane of staying retains along edge, goaf in former crossheading position, be called gob side entry retaining, gob side entry retaining can Resource recovery to greatest extent, avoids coal body to lose.For girdle gob-side entry retaining method, mainly contain following several form at present:
(1) slabbing form: the problems such as this mode is because support material is wide in variety, and workload is large, and supporting effect is poor, goaf isolation effect difference are seldom applied.
(2) spoil way of stacking: the method can not reach timely and effective roof supporting, easily causes the excessive sinking of top board to cause tunnel to be unfavorable for actual mining.Although this mode material unit price is low, can consume a large amount of manpowers, and isolation effect is very poor, therefore adaptive surface is very little.
(3) masonry wall method: what the method still can not solve body of wall and top board connects top problem, often causes the excessive absciss layer of top board to make supporting effect not good.
(4) high-water material roadside packing method: the method is the left road way of main flow, be applicable to carrying out extensive gob side entry retaining, but its cost is high.
(5) cast-in-situ concrete partition wall method: the shortcoming of the method is that the complexity of its higher engineering cost and construction and the speed of intensity rising can not adapt to high yield and high efficiency mine work plane.
Summary of the invention
In order to solve above deficiency, the object of the present invention is to provide a kind of cost low, high safety, recovery ratio are high, labour intensity is low, easy construction, can adapt to the girdle gob-side entry retaining method of coal seam thickness, change of pitch angle, is referred to as cement bastard coal slag stone walling and woven bag wall gob side entry retaining method.
The object of the invention is to be achieved through the following technical solutions:
A kind of girdle gob-side entry retaining method, comprises the following steps:
(1) first time left road way
The method gob side entry retaining building cement bastard coal slag stone walling is adopted in side, tunnel, add dozen single anchor cable in Bing Liu lane to reinforce rock stratum unstable above tunnel, described cement bastard coal slag stone walling is built into by bastard coal slag cement woven bag wall, bastard coal pulp water mud wall and bastard coal slag woven bag wall, before bastard coal slag cement woven bag wall is positioned at bastard coal pulp water mud wall as template, after bastard coal slag woven bag wall is positioned at bastard coal pulp water mud wall, the wall of bastard coal pulp water mud wall is wide is 0.8m, and the wall of bastard coal slag cement woven bag wall and bastard coal slag woven bag wall is wide is 0.4m.
(2) second time left road way
After staying lane for the first time, the mode gob side entry retaining arranging woven bag wall is adopted after the same side, tunnel, supporting facility, described woven bag wall is built into by bastard coal slag woven bag wall and bastard coal slag, bastard coal slag woven bag wall is arranged in both sides, centre bastard coal slag tamps, and the wall of bastard coal slag woven bag wall is wide is 0.4m.
Gob side entry retaining method provided by the invention has the following advantages:
1) this method stays lane to construct by twice, and cement cash slag stone walling method gob side entry retaining is built in first time left road way employing; Second time left road way adopts arranges woven bag wall method gob side entry retaining.Arrange woven bag Qiang Liu lane, tamp with spoil, cement material in woven bag wall gap, and build with water.The method realizes down-hole and gathers materials on the spot, and technique is simple, and easy construction, is beneficial to operation.
2) in tunnel, supporting safeguards double array pitch 1m × 1m prestressed anchor that top board is used during being driving, the anchor cable of work order trestle column 2m before exploitation Hou Liu lane, anchor cable and woven bag wall effectively improve tunnel supporting capacity, control roadway deformation, and roadway maintenance is effective.
3) woven bag wall can control gas string in goaf well and, to reserved tunnel, define the tunnel that can meet ventilation requirement, by Cai Houliu lane, can reduce excavation work amount, both cost-saved, can reduce labour intensity again, improves coal recovery rate.
Accompanying drawing explanation
Fig. 1 is a kind of girdle gob-side entry retaining method of the present invention tunnel filling arrangement diagram; In figure: 1-bastard coal slag cement woven bag wall; 2-bastard coal pulp water mud wall; 3-bastard coal slag woven bag wall; 4-bastard coal slag; 5-wood point post; 6-anchor cable; 7-anchor pole.
Detailed description of the invention
Below in conjunction with accompanying drawing, technical scheme of the present invention is further described; but be not limited thereto; everyly technical solution of the present invention modified or equivalent to replace, and not departing from the spirit and scope of technical solution of the present invention, all should be encompassed in protection scope of the present invention.
Girdle gob-side entry retaining method provided by the invention stays lane to construct by twice, and cement cash slag stone walling method gob side entry retaining is built in first time left road way employing; Second time left road way adopts woven bag wall method gob side entry retaining.Concrete steps are as follows:
(1) first time left road way
(1) adopt the method gob side entry retaining building cement bastard coal slag stone walling, add dozen anchor cable in Bing Liu lane and rock stratum unstable above tunnel is reinforced.
(2) construction technical data and technological requirement:
1. the quality proportioning of cement and bastard coal slag is 1:3.
2. stone walling width built by cement is bastard coal pulp water mud wall 2, before wall wide 0.8m(cash pulp water mud wall preliminary roof caving, 1.1m is wide), adopt the woven bag of dress cash slag cement to do template, bastard coal slag cement woven bag wall 1 and bastard coal pulp water mud wall 2 beam overall are that before 1.2m(preliminary roof caving, 1.5m is wide).
3. cable parameters: diameter is 15.24mm steel strand 4.5m, anchored force 200KN, and resin explosive roll length is 1200mm, anchor cable 6 length of appearing is 150 ~ 300mm.
(3), for ensureing the effective execution of above construction parameter, spy has carried out strict regulations to construction technology:
1. strict proportioning on request, must use clear water during proportioning, must stir, must use pneumatic shock club tamping when building, stone walling plug gets rid of stubble and is forbidden flush.
2. striking time is not less than 24 hours, and revetment post 1m mono-, delayed break line is no less than 40m.
3. cement must be placed on dry place, and the cement of moist scleroma is firmly inaccurate to be used, and is provided with cement and uses machine account, guarantee cement consumption.
(2) second time left road way
(1) adopt and arrange that woven bag wall mode stays lane, retain the supporting facilities such as the anchor pole 7 in its former tunnel, anchor cable 6, add in soft side side during arranging sack and make a call to row's wood point post 5 and assist and cut top.
(2) construction technical data and technological requirement:
1. woven bag wall (being built into by bastard coal slag woven bag wall 3 and bastard coal slag 4) arranges that width is 2m in open-off cut, upper lane 1.5m.
2. interior side rail point post 5 spacing is 1m.
(3) for ensureing the effective execution of above construction parameter, spy has carried out strict regulations to construction technology. and woven bag wall must be arranged sternly, reality, connect top, connect the end and must not leak out, be arranged in both sides with knitting bagged spoil and form bastard coal slag woven bag wall 3, centre bastard coal slag 4(spoil and cement) to tamp, when spoil and cement are filled out in centre, use water irrigates.
Claims (8)
1. a girdle gob-side entry retaining method, it is characterized in that described method stays for twice lane to construct, concrete steps are as follows:
(1) first time stays lane
The method gob side entry retaining building cement bastard coal slag stone walling is adopted in side, tunnel;
(2) second time stays lane
First time adopts the mode gob side entry retaining arranging woven bag wall after staying lane after the same side, tunnel, supporting facility.
2. girdle gob-side entry retaining method according to claim 1, when it is characterized in that described first time stays lane, stays in lane to add and plays single anchor cable and reinforce rock stratum unstable above tunnel.
3. girdle gob-side entry retaining method according to claim 2, is characterized in that described cable interval 2m.
4. the girdle gob-side entry retaining method according to Claims 2 or 3, is characterized in that described anchor cable length of appearing is 150 ~ 300mm.
5. girdle gob-side entry retaining method according to claim 1, it is characterized in that described cement bastard coal slag stone walling is built into by bastard coal slag cement woven bag wall, bastard coal pulp water mud wall and bastard coal slag woven bag wall, before bastard coal slag cement woven bag wall is positioned at bastard coal pulp water mud wall as template, after bastard coal slag woven bag wall is positioned at bastard coal pulp water mud wall.
6. girdle gob-side entry retaining method according to claim 5, it is characterized in that the wall of described bastard coal pulp water mud wall is wide for 0.8m, the wall of bastard coal slag cement woven bag wall and bastard coal slag woven bag wall is wide is 0.4m.
7. girdle gob-side entry retaining method according to claim 1, is characterized in that described woven bag wall is built into by bastard coal slag woven bag wall and bastard coal slag, and bastard coal slag woven bag wall is arranged in both sides, and centre bastard coal slag tamps.
8. girdle gob-side entry retaining method according to claim 7, is characterized in that the wall of described bastard coal slag woven bag wall is wide for 0.4m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410401702.0A CN104295315A (en) | 2014-08-15 | 2014-08-15 | Low coal seam gob-side entry retaining method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410401702.0A CN104295315A (en) | 2014-08-15 | 2014-08-15 | Low coal seam gob-side entry retaining method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104295315A true CN104295315A (en) | 2015-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410401702.0A Pending CN104295315A (en) | 2014-08-15 | 2014-08-15 | Low coal seam gob-side entry retaining method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105971640A (en) * | 2016-07-08 | 2016-09-28 | 西安科技大学 | Strengthening method for gob-side entrydriving narrow coal pillar |
| CN106014479A (en) * | 2016-05-16 | 2016-10-12 | 大同煤矿集团有限责任公司 | Bracket reducing method for mining lower-layer working surface of ultra-close coal seam |
| CN106907177A (en) * | 2017-04-28 | 2017-06-30 | 山东科技大学 | A kind of girdle gob side entry retaining roadside packing method for protecting support |
| CN107035405A (en) * | 2016-12-06 | 2017-08-11 | 太原理工大学 | One kind is used for the double filling wall constructions of gob side entry retaining and cuts top pressure relief method |
| CN112943250A (en) * | 2021-04-02 | 2021-06-11 | 湖南科技大学 | Method for reserving roadway in filling area |
Citations (4)
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|---|---|---|---|---|
| DE3922236A1 (en) * | 1989-07-06 | 1991-01-17 | Lehmacher & Sohn Masch | Triangular plastics bag mfr. - from double layer of plastics film strip cut and welded obliquely |
| CN101949301A (en) * | 2010-08-30 | 2011-01-19 | 山东新矿赵官能源有限责任公司 | Different-strength bearing roadway-beside filling body of gob-side entry under coal mine |
| CN101967992A (en) * | 2010-09-17 | 2011-02-09 | 山东新矿赵官能源有限责任公司 | Different-strength bearing roadside filler for pillar-free mining of thin coal bed |
| CN202215249U (en) * | 2011-07-05 | 2012-05-09 | 徐州贝壳迈宁矿业科技有限公司 | Layering pack wall along for hollow entry retaining in solid filling coal mining |
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2014
- 2014-08-15 CN CN201410401702.0A patent/CN104295315A/en active Pending
Patent Citations (4)
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| DE3922236A1 (en) * | 1989-07-06 | 1991-01-17 | Lehmacher & Sohn Masch | Triangular plastics bag mfr. - from double layer of plastics film strip cut and welded obliquely |
| CN101949301A (en) * | 2010-08-30 | 2011-01-19 | 山东新矿赵官能源有限责任公司 | Different-strength bearing roadway-beside filling body of gob-side entry under coal mine |
| CN101967992A (en) * | 2010-09-17 | 2011-02-09 | 山东新矿赵官能源有限责任公司 | Different-strength bearing roadside filler for pillar-free mining of thin coal bed |
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Non-Patent Citations (2)
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106014479A (en) * | 2016-05-16 | 2016-10-12 | 大同煤矿集团有限责任公司 | Bracket reducing method for mining lower-layer working surface of ultra-close coal seam |
| CN106014479B (en) * | 2016-05-16 | 2018-02-23 | 大同煤矿集团有限责任公司 | Ultra close distance coal seam exploitation lower floor working face reduction stent Methods |
| CN105971640A (en) * | 2016-07-08 | 2016-09-28 | 西安科技大学 | Strengthening method for gob-side entrydriving narrow coal pillar |
| CN105971640B (en) * | 2016-07-08 | 2018-08-03 | 西安科技大学 | A kind of reinforcement means of gob side entry driving thin coal pillar |
| CN107035405A (en) * | 2016-12-06 | 2017-08-11 | 太原理工大学 | One kind is used for the double filling wall constructions of gob side entry retaining and cuts top pressure relief method |
| CN107035405B (en) * | 2016-12-06 | 2018-12-18 | 太原理工大学 | One kind cutting top pressure relief method for the double filling wall constructions of gob side entry retaining |
| CN106907177A (en) * | 2017-04-28 | 2017-06-30 | 山东科技大学 | A kind of girdle gob side entry retaining roadside packing method for protecting support |
| CN106907177B (en) * | 2017-04-28 | 2019-05-03 | 山东科技大学 | A kind of girdle gob side entry retaining roadside packing method for protecting support |
| CN112943250A (en) * | 2021-04-02 | 2021-06-11 | 湖南科技大学 | Method for reserving roadway in filling area |
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Application publication date: 20150121 |
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| RJ01 | Rejection of invention patent application after publication |