CN100554642C - A kind of method of long-wall integrated-extraction reclaiming room-type coal column mining - Google Patents
A kind of method of long-wall integrated-extraction reclaiming room-type coal column mining Download PDFInfo
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- CN100554642C CN100554642C CNB200710132573XA CN200710132573A CN100554642C CN 100554642 C CN100554642 C CN 100554642C CN B200710132573X A CNB200710132573X A CN B200710132573XA CN 200710132573 A CN200710132573 A CN 200710132573A CN 100554642 C CN100554642 C CN 100554642C
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- 238000005065 mining Methods 0.000 title claims abstract description 86
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- 238000000605 extraction Methods 0.000 title claims abstract description 10
- 238000011084 recovery Methods 0.000 claims abstract description 19
- 238000009423 ventilation Methods 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 4
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- 229910052757 nitrogen Inorganic materials 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011435 rock Substances 0.000 description 3
- 238000005422 blasting Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
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Abstract
A kind of method of long-wall integrated-extraction reclaiming room-type coal column mining is hung screen between the coal column of first row coal column and air intake lane and return airway both sides of fully-mechanized mining working, form the ventilation system that can carry out longwall full-mechanized mining technique; Arrange fully-mechanized mining equipment at fully-mechanized mining working; In the 30m scope of fully-mechanized mining working the place ahead, the top board of air intake lane and return airway is carried out advance support with individual prop or grillage; Along arranging the high supporting support resistance hydraulic of a row in the bordroom of fully-mechanized mining working direction of propulsion the place ahead 5m, then carry out the recovery of first row's coal column; In reclaiming the coal column process, between the coal column of next row's fully-mechanized mining working and coal column, hang screen, form ventilation system when guaranteeing to reclaim next row's coal column; High supporting support resistance hydraulic moves with fully-mechanized mining working surface hydraulic support and mobile, and the two remains the distance about 5m, thereby constantly reclaims coal column.The recyclable room mining of this method stays the permanent coal pillar of establishing more than 85%, and its method is easy, and is with a wide range of applications.
Description
Technical field
The present invention relates to the colliery and reclaim the method for room mining coal column, especially adopt the method for long-wall integrated-extraction reclaiming room-type coal column mining.
Background technology
Reserved coal pillar has become a great problem that the western Coal Production of China is faced after the room mining.Room formula coal-mining method makes a large amount of coal be retained in the down-hole with the form of abandoned coal pillar, and coal mining rate only has about 30%, causes the serious waste of coal resources.Along with the growing tension of the energy, how to reclaim room mining and stay the coal column of establishing to become very urgent task.This situation not only can cause the great wasting of resources, mine service-life to shorten greatly as can not get effective solution, simultaneously also brings employment, a series of social concerns such as stablizes to country.
At present abroad the mode about the room mining Pillar Recovery mainly contains: split pillar, storehouse wing formula, advance formula and opening tag outward.The domestic practice about reclaiming the room mining coal column has: the Tai Feng colliery is for reclaiming the room mining reserved coal pillar, utilize the non-machine of ZZ10000/32/62 type support shield type of Tai'an coal machine factory and institute of Beijing coal section design to pick up from moving hydraulic support, 23 on the required support of fully-mechanized mining working, 30 on the required support of stope advance support.Pillar Recovery adopts the method coal breakage (big gun is adopted) of rig perforating, deep hole blasting.But above these practices and attempt that its mechanization degree is relatively low, production efficiency is poor, small scale or part be in conceptual phase.Study room a kind of maturation, that mechanization degree is high formula Pillar Recovery technology and become the great technical barrier that the room mining mine needs to be resolved hurrily.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of mechanization degree height, the method for the long-wall integrated-extraction reclaiming room-type coal column mining that production efficiency is high.
Technical scheme: the method for long-wall integrated-extraction reclaiming room-type coal column mining of the present invention:
A. arrange between coal column and the coal column at first of fully-mechanized mining working and hang screen; Between the coal column of air intake lane and return airway both sides and coal column, hang screen, form the ventilation system of fully-mechanized mining working;
B. arrange fully-mechanized mining equipment along fully-mechanized mining working;
C. advance support is carried out in air intake lane and return airway, simultaneously between the coal column of fully-mechanized mining working direction of propulsion and coal column, high supporting support resistance hydraulic is set, this high supporting support resistance hydraulic moves with the comprehensive mining hydraulic bracket of fully-mechanized mining working, and the two distance remains unanimity;
D. first row's coal column to fully-mechanized mining working reclaims, and to hanging screen between next row's of fully-mechanized mining working coal column and the coal column, forms ventilation system to guarantee fully-mechanized mining working all the time in reclaiming the coal column process simultaneously;
When the coal seam also the difference of former state and oxidation sample be less than 15, ignition temperature needs goaf and the inflammable place of coal column are implemented thick loess grouting, annotated the nitrogen flame-retarding means, to prevent the spontaneous combustion of coal during less than 300 ℃;
When harder and thickness was big when top board, fully-mechanized mining working whenever pushed away 5～15m and takes boring to blow out to force the caving measure, make the goaf top plate inbreak, with the safety that guarantees to produce;
E. first row's coal column combine adopt reclaim finish after, fully-mechanized mining equipment and high supporting support resistance hydraulic are pushed ahead to next row's coal column, and advance support are carried out in air intake lane and return airway, carry out the recovery of next row's coal column;
F. repeat said process, constantly reclaim coal column, finish until Pillar Recovery.
The hydraulic support that is provided with between described single coal column and the coal column is 3～6.
Beneficial effect: the method for this long-wall integrated-extraction reclaiming room-type coal column mining, between the coal column of room mining, hang screen, the fully-mechanized mining working ventilation system that makes its formation can adopt fully-mechanized mining equipment to carry out, recovery by the room mining coal column, not only prolonged the length of service of mine, and can provide the important energy support for the national economy sustained, stable growth, also can realize the maximization of enterprise's number one simultaneously.Compare with existing room mining, increased substantially the rate of recovery of coal resources, coal recovery rate is brought up to more than 85% by 30%, not only solved the low problem of the colliery room mining rate of extraction, and provide technological borrowing for the recovery of conditions of similarity mining area coal column, its method is easy, easily implements, and is with a wide range of applications.
Description of drawings
Accompanying drawing is the fully-mechanized mining working arrangement diagram that fully-mechanized mining working of the present invention reclaims the room mining coal column.
Among the figure: 1-fully-mechanized mining working, the high supporting support resistance hydraulic of 2-, 3-comprehensive mining hydraulic bracket, 4-screen, 5-individual prop and grillage, 6-coal column, 8-air intake lane, 7-return airway.
The specific embodiment
Below in conjunction with accompanying drawing one embodiment of the present of invention are further described:
Carrying out longwall full-mechanized mining technique recovery coal column with the logical rich colliery of Ulan group is example, this ore deposit is positioned at east and wins the east, coalfield, the production zone coal seam is reclaimed in design, belonging to single inclined seam inclination angle is 1～3 °, average buried depth is 90m, average thickness 5.30m, the exploitation bordroom is of a size of 7.5 * 9 * 4.5m, and the fully-mechanized mining working reserved coal pillar is of a size of 9 * 9 * 4.5m.Designing fully-mechanized mining working length routinely is 120m, and it is 1400m that fully-mechanized mining working advances length.
It is as follows that it combines the method for adopting recovery room mining coal column:
(1) between first row coal column 6 and the coal column of fully-mechanized mining working 1, hangs screen 4, between the coal column of air intake lane 8 and return airway 7 both sides and coal column, hang screen 4, as shown in FIG.: fresh wind by direction shown in " → " through air intake lane 8 and fully-mechanized mining working 1, dirty wind by
Shown in flow out from return airway 7, form the ventilation system of fully-mechanized mining working 1;
(2) arrange fully-mechanized mining equipment along fully-mechanized mining working 1 direction, the comprehensive mining hydraulic bracket model of selecting for use is ZY9000/24/55, and the coal-winning machine model is MG500/1130-WD; Install scalable rubber conveyer in air intake lane 8, the conveyer model is DSJ100/63/90 * 2; The coal edge of reclaiming
Shown in direction be transported to ground;
(3) in fully-mechanized mining working 1 the place ahead 20m scope, carry out advance support with individual prop and 5 pairs of air intake lanes 8 of grillage and return airway 7; Because bordroom is of a size of 7.5 * 9 * 4.5m, consider simultaneously and will be convenient to moving of support, along 4 the high supporting support resistance hydraulic 2 of ZZ10000/32/62 that are arranged side by side between two coal columns of 1 direction of propulsion of coal work, can carry out the recovery of first row's coal column 6 then;
(4) the high supporting support resistance hydraulic 2 of the ZZ10000/32/62 between bordroom is with the moving of comprehensive mining hydraulic bracket 3, and each displacement is 0.6m (coal-winning machine cuts dark), and the two remains the distance about 5m;
(5) when fully-mechanized mining working 1 is reclaimed first row's coal column 6, next row is being hung screen 4 between the coal column of fully-mechanized mining working and coal column, guarantee that fully-mechanized mining working 1 can form ventilation system when reclaiming next row's coal column, the order of layout screen is A-B-C-D as shown in drawings Need build stifled brattice sealing with materials such as cement, flyash if any the serious location of leaking out and adopt the sky bordroom, make the broadwall fully-mechanized mining working form a closed area, to eliminate or the reduction inleakage;
Because also the difference of former state and oxidation sample is less than 15 for this pit coal layer, ignition temperature is less than 300 ℃, need carry out thick loess grouting to the goaf that longwall full-mechanized mining technique reclaims behind the room formula coal column, prevents its spontaneous combustion, otherwise, then do not need to take this measure.Concrete measure is that a certain amount of soil is sent into slip agitating tank, and adds a certain amount of water, is stirred by mixer and makes mud, and this mud advances the people again and collects stock tank, pumps to the down-hole through the slag stock pump, and the Tu Shui ratio was generally 1: 6～1: 8;
Because this ore deposit coal roof lithologic is based on argiloid, rock nature terminal compression strength of the single axle is 20～40MPa, belong to weakness～half solid rock, rock stratum compressive strength is low, steadiness is poor, but owing to implementing in the room mining process in early stage, what be installed with 0.8m protects the top coal, because ature of coal is harder, causes top board to be difficult to collapse and falls.Therefore need to adopt the roof control mode of whole caving methods, top board is implemented forced boring to blow out the caving measure to force caving.Concrete measure is: when the advance distance that reclaims coal column when fully-mechanized mining working reaches 6m, along the single layout blasting boreholes of fully-mechanized mining working, pitch of holes 8m, with the horizontal elevation angle be 35 °, use alloy tool steel bit, diameter of phi=85mm, hole depth 15～20m;
After (6) first row's coal columns 6 reclaim and finish, fully-mechanized mining equipment and high supporting support resistance hydraulic 2 are pushed ahead to next row's coal column, and advance support is carried out in air intake lane 8 and return airway 7, carry out next row's Pillar Recovery;
(7) repeat said process, constantly reclaim coal column, finish until Pillar Recovery.
Claims (2)
1. method that adopts long-wall integrated-extraction reclaiming room-type coal column mining is characterized in that:
A. fully-mechanized mining working (1) first row coal column (6) coal column and coal column between hang screen (4); Between the coal column of air intake lane (8) and return airway (7) both sides coal column and coal column, hang screen (4), form the ventilation system of fully-mechanized mining working (1);
B. arrange fully-mechanized mining equipment along fully-mechanized mining working (1);
C. advance support is carried out in air intake lane (8) and return airway (7), simultaneously between the coal column of fully-mechanized mining working (1) direction of propulsion and coal column, arrange high supporting support resistance hydraulic (2), high supporting support resistance hydraulic (2) moves with the comprehensive mining hydraulic bracket (3) of fully-mechanized mining working (1), and the two distance remains unanimity;
D. first row's coal column (6) of fully-mechanized mining working (1) is combined and adopted recovery, to hanging screen (4) between next row's of fully-mechanized mining working (1) coal column and the coal column, in recovery coal column process, form ventilation system all the time simultaneously to guarantee fully-mechanized mining working (1);
When the coal seam also the difference of former state and oxidation sample be less than 15, ignition temperature needs goaf and the inflammable place of coal column are implemented thick loess grouting, annotated the nitrogen flame-retarding means, to prevent the spontaneous combustion of coal during less than 300 ℃;
When harder and average thickness was 5.30m when top board, fully-mechanized mining working whenever pushed away 5～15m and takes boring to blow out to force the caving measure, make the goaf top plate inbreak, with the safety that guarantees to produce;
E. after first row's coal column (6) reclaims and finishes, fully-mechanized mining equipment and high supporting support resistance hydraulic (2) are pushed ahead to next row's coal column, and air intake lane (8) and return airway (7) are carried out advance support with individual prop and grillage (5), carry out next row's Pillar Recovery;
F. repeat said process, constantly reclaim coal column, finish until Pillar Recovery.
2. the method for long-wall integrated-extraction reclaiming room-type coal column mining according to claim 1, it is characterized in that: the high supporting support resistance hydraulic (2) that is provided with between single coal column and the coal column is 3～6.
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| CNB200710132573XA CN100554642C (en) | 2007-09-19 | 2007-09-19 | A kind of method of long-wall integrated-extraction reclaiming room-type coal column mining |
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| CN101260805B (en) * | 2008-04-15 | 2011-05-11 | 吕平 | Fully-mechanized mining method for safely passing bottom board laneway rock pillar |
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| CN112943343B (en) * | 2021-03-17 | 2023-05-26 | 河南理工大学 | Efficient and rapid fire extinguishing method for ground drilling of different types of fires in coal mine goaf |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3695711A (en) * | 1970-01-21 | 1972-10-03 | Wintershall Ag | Method of recovering underground deposits of soluble minerals, and apparatus for carrying out the method |
| US4017121A (en) * | 1974-11-25 | 1977-04-12 | Allied Chemical Corporation | Longwall mining of trona with prefracturing to prevent slabbing |
| CN1221727C (en) * | 2002-09-09 | 2005-10-05 | 神华集团有限责任公司 | Continuous miner house column type short arm mechanized coal mining process and support equipment thereof |
| CN1858401A (en) * | 2006-05-31 | 2006-11-08 | 段连权 | Coal mining process including prop type mining and prop recovery |
| CN1865657A (en) * | 2005-05-19 | 2006-11-22 | 兖矿集团有限公司 | Comprehensive coal-mining process by using long wall mining method |
-
2007
- 2007-09-19 CN CNB200710132573XA patent/CN100554642C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3695711A (en) * | 1970-01-21 | 1972-10-03 | Wintershall Ag | Method of recovering underground deposits of soluble minerals, and apparatus for carrying out the method |
| US4017121A (en) * | 1974-11-25 | 1977-04-12 | Allied Chemical Corporation | Longwall mining of trona with prefracturing to prevent slabbing |
| CN1221727C (en) * | 2002-09-09 | 2005-10-05 | 神华集团有限责任公司 | Continuous miner house column type short arm mechanized coal mining process and support equipment thereof |
| CN1865657A (en) * | 2005-05-19 | 2006-11-22 | 兖矿集团有限公司 | Comprehensive coal-mining process by using long wall mining method |
| CN1858401A (en) * | 2006-05-31 | 2006-11-08 | 段连权 | Coal mining process including prop type mining and prop recovery |
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