CN105822305A - Overlying strata settlement reducing method for coal mining through isolated grouting and bashing - Google Patents
Overlying strata settlement reducing method for coal mining through isolated grouting and bashing Download PDFInfo
- Publication number
- CN105822305A CN105822305A CN201610150883.3A CN201610150883A CN105822305A CN 105822305 A CN105822305 A CN 105822305A CN 201610150883 A CN201610150883 A CN 201610150883A CN 105822305 A CN105822305 A CN 105822305A
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- coal
- mining
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- length
- column
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- 239000003245 coal Substances 0.000 title claims abstract description 97
- 238000005065 mining Methods 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000005553 drilling Methods 0.000 claims abstract description 4
- 239000011435 rock Substances 0.000 claims description 9
- 238000007569 slipcasting Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 3
- 230000003203 everyday effect Effects 0.000 claims description 3
- 238000009423 ventilation Methods 0.000 claims description 3
- 239000011148 porous material Substances 0.000 abstract 3
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 16
- 238000002955 isolation Methods 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000006872 improvement Effects 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 239000013521 mastic Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
-
- 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
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- 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
- E21F15/08—Filling-up hydraulically or pneumatically
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)
- Remote Sensing (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
An overlying strata settlement reducing method for coal mining through isolated grouting and bashing comprises the following steps: step a, measuring the length of a stope face; step b, examining the length of the stope face according to a formula: L=60vMSCf/(qbBPN); step c, obtaining the number of coal columns that are required for supporting an overlying strata and the distance between two coal columns; step d, obtaining the positions of each coal columns, and drilling the ground above the coal columns to the coal columns, wherein the bottoms of the pores are arranged between the overlying strata and the tops of the coal columns; step e, through the pores obtained in the step d, carrying out high pressure grouting on the pores so as to form a filled layer above the coal columns, and forming a packed supporting area above the coal columns through the extrusion of the filled layer. The provided method is mainly applied to the field of underground coal mining, and is suitable for common long-wall combined mining face. The mining width of single working face can reach 150-200 meters. The mining rate is more than 80%, and the surface subsidence coefficient is control in a range of 0.10 to 0.15.
Description
Technical field
The present invention relates to Jian Chen field, mining area, a kind of overlying strata for coal mining are isolated
Filling is subtracted heavy method by post.
Background technology
Building presses down coal to be one of significant technology issues perplexing China's coal-mine, in east mining area
Especially prominent, as a example by the Huaibei mining industry group being located in mining area, East China, existing pressure coal village 300
Remaining place, coal under villages amount accounts for the 47% of gross reserves, and part mine is up to 80%, expense of relocating residents from locations to be used for construction of new buildings or factories every year
With up to 8-10 hundred million yuan.In the last few years, the development of filling coal mining technology was to a certain extent to this
One problem serves mitigation, defines as multiple mined out in solid, mastic, high-water material etc.
District's filling mining technology, and part filling coal mining technology.Develop at coal mine filling production technique
During, raising filling coal mining efficiency, reduction filling cost are one of its research theme all the time,
Part filling coal mining technology is expected to become the effective way solving this problem.Overlying strata isolation slip casting is filled
Tian Buqian village coal-mining technique is the important component part of part filling technique.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of overlying strata for coal mining
Filling is subtracted heavy method by insulated column.
The present invention solves that the technical scheme that above-mentioned technical problem uses is:
Filling is subtracted heavy method by a kind of overlying strata insulated column for coal mining,
Described method step is as follows:
A. Length of coal face is measured: by the winning equipment in current colliery, coal geology bar
Part and draught capacity determine Length of coal face；
B. Length of coal face is verified: pass through formula:
L=60vMSCf/(qbBPN), wherein: the work surface that L is allowed by ventilation capacity of mining face
Length；
V is the interior maximum wind velocity allowed of work surface；M is work surface mining height；S be work surface
The little distance of face roof under control；CfFor distinguished and admirable constriction coefficient, desirable 0.9-0.95；qbFor producing one ton of coal institute round the clock
Required airflow；It is deep that B is that coal-winning machine cuts；P is coal seam productivity ratio；N is coal cutting every day cutter number；
If the Length of coal face obtained in step a can be verified by the formula in step b,
Face length is stepped in returning of then taking steps to obtain in a；If the actual mining obtained in step a
Face length degree can not be verified by the formula in step b, then repeat step a；
C. the Length of coal face after being verified by step b, is obtained for maintaining rock stratum to hold
Carry required spacing distance between reserved coal column quantity and each coal column；
D. by the coal column quantity obtained in step c and detecting distance, each coal column position is obtained,
Carried out drilling operation by the ground above coal column to coal column, be positioned at bottom hole described rock stratum with
Between coal column top；
E. by the hole obtained in step d, high-pressure slip-casting operation is carried out via hole, at coal
Form packed layer above post, obtain being compacted Support by being squeezed in above coal column of packed layer,
Combined the structure of support rock stratum by compacting Support with coal column, reach ground and subtract heavy mesh
's.
Further, the winning equipment in described step a is coal-winning machine and drag conveyor.
The invention have the benefit that
1., compared with tradition absciss layer district grouting filling, this technology is by implementing " isolation " and improving
Grouting filling technique has carried out the improvement of mechanism and 2 aspects of technology.In subsidence control mechanism
On, that no longer depends merely on grouting filling body subtracts heavy effect, the compacting zone formed after utilizing grouting filling
Jointly played a role with staying the isolated coal pillar set；In addition the improvement of process aspect so that note is adopted
Obtain significantly than (in overlying strata, the compacting flyash volume of filling accounts for the percentage ratio of volume withdrawl)
Improve (up to more than 40%), provide possibility for forming compacting zone.Therefore, in appropriate design
Work surface adopts width and isolated coal pillar, and under conditions of strictly controlling injection-production ratio, overlying strata isolation slip casting
Filling can effectively reduce surface subsidence, it is achieved mines in Bu Qian village.
2. overlying strata isolation grouting filling is mainly used in coal mining underbuildings field, and this technology is suitable for
In conventional longwall full-mechanized mining technique work surface, single stope is adopted width and be may be disposed so that 150-200m, coal adopt
Going out rate and be more than 80%, subsidence coefficient can be controlled in 0.10-0.15.
3., compared with Traditional bandoleer exploitation, overlying strata isolation grouting filling adopts the face width of technology
Significantly increase with recovery ratio, longwell high-efficiency mining can be realized.Compared with underground filling production technique,
The filling system of overlying strata isolation grouting filling coal-mining technique is relatively easy, the construction period is short；Without
Change original coal winning technology and newly-increased special filling support；Mine and filling interferes few, fill
Filling out coal mining efficiency high, filling cost is low, overcomes underground filling production technique to a certain extent
2 hang-ups that coal mining efficiency is low and cost is high.
Detailed description of the invention
Filling is subtracted heavy method by a kind of overlying strata insulated column for coal mining, and method step is such as
Under:
A. Length of coal face is measured: by the winning equipment in current colliery, coal geology bar
Part and draught capacity determine Length of coal face；Winning equipment is that coal-winning machine carries with scraper plate
Machine；
B. Length of coal face is verified: pass through formula:
L=60vMSCf/(qbBPN), wherein: the work surface that L is allowed by ventilation capacity of mining face
Length；
V is the interior maximum wind velocity allowed of work surface；M is work surface mining height；S be work surface
The little distance of face roof under control；CfFor distinguished and admirable constriction coefficient, desirable 0.9-0.95；qbFor producing one ton of coal institute round the clock
Required airflow；It is deep that B is that coal-winning machine cuts；P is coal seam productivity ratio；N is coal cutting every day cutter number；
If the Length of coal face obtained in step a can be verified by the formula in step b,
Face length is stepped in returning of then taking steps to obtain in a；If the actual mining obtained in step a
Face length degree can not be verified by the formula in step b, then repeat step a；
C. the Length of coal face after being verified by step b, is obtained for maintaining rock stratum to hold
Carry required spacing distance between reserved coal column quantity and each coal column；
D. by the coal column quantity obtained in step c and detecting distance, each coal column position is obtained,
Carried out drilling operation by the ground above coal column to coal column, be positioned at bottom hole described rock stratum with
Between coal column top；
E. by the hole obtained in step d, high-pressure slip-casting operation is carried out via hole, at coal
Form packed layer above post, obtain being compacted Support by being squeezed in above coal column of packed layer,
Combined the structure of support rock stratum by compacting Support with coal column, reach ground and subtract heavy mesh
's.
Compared with tradition absciss layer district grouting filling, this technology is by implementing " isolation " and improving note
Slurry filling process has carried out the improvement of mechanism and 2 aspects of technology.In subsidence control mechanism,
That no longer depends merely on grouting filling body subtracts heavy effect, the compacting zone formed after utilizing grouting filling and institute
The isolated coal pillar set is stayed jointly to play a role；In addition the improvement of process aspect so that injection-production ratio
(in overlying strata, the compacting flyash volume of filling accounts for the percentage ratio of volume withdrawl) has obtained significantly carrying
High (up to more than 40%), provides possibility for forming compacting zone.Therefore, in appropriate design work
Adopt width and isolated coal pillar as face, and under conditions of strictly controlling injection-production ratio, overlying strata isolation slip casting is filled
Fill out and can effectively reduce surface subsidence, it is achieved mine in Bu Qian village.
Overlying strata isolation grouting filling is mainly used in coal mining underbuildings field, and this technology is applicable to
Conventional longwall full-mechanized mining technique work surface, single stope is adopted width and be may be disposed so that 150-200m, coal extraction
Rate is more than 80%, and subsidence coefficient can be controlled in 0.10-0.15.
Compared with Traditional bandoleer exploitation, overlying strata isolation grouting filling adopts face width and the extraction of technology
Rate significantly increases, and can realize longwell high-efficiency mining.Compared with underground filling production technique, overlying strata
The filling system of isolation grouting filling coal-mining technique is relatively easy, the construction period is short；Without changing
Original coal winning technology and newly-increased special filling support；Mining and filling interferes few, filling is adopted
Coal efficiency is high, and filling cost is low, overcomes the coal mining of underground filling production technique to a certain extent
2 hang-ups that efficiency is low and cost is high.
Claims (2)
1. filling is subtracted a heavy method by the overlying strata insulated column for coal mining, and its feature exists
In:
Described method step is as follows:
A. Length of coal face is measured: by the winning equipment in current colliery, coal geology bar
Part and draught capacity determine Length of coal face；
B. Length of coal face is verified: pass through formula:
L=60vMSCf/(qbBPN), wherein: the work surface that L is allowed by ventilation capacity of mining face
Length；
V is the interior maximum wind velocity allowed of work surface；M is work surface mining height；S be work surface
The little distance of face roof under control；CfFor distinguished and admirable constriction coefficient, desirable 0.9-0.95；qbFor producing one ton of coal institute round the clock
Required airflow；It is deep that B is that coal-winning machine cuts；P is coal seam productivity ratio；N is coal cutting every day cutter number；
If the Length of coal face obtained in step a can be verified by the formula in step b,
Face length is stepped in returning of then taking steps to obtain in a；If the actual mining obtained in step a
Face length degree can not be verified by the formula in step b, then repeat step a；
C. the Length of coal face after being verified by step b, is obtained for maintaining rock stratum to hold
Carry required spacing distance between reserved coal column quantity and each coal column；
D. by the coal column quantity obtained in step c and detecting distance, each coal column position is obtained,
Carried out drilling operation by the ground above coal column to coal column, be positioned at bottom hole described rock stratum with
Between coal column top；
E. by the hole obtained in step d, high-pressure slip-casting operation is carried out via hole, at coal
Form packed layer above post, obtain being compacted Support by being squeezed in above coal column of packed layer,
Combined the structure of support rock stratum by compacting Support with coal column, reach ground and subtract heavy mesh
's.
Filling is subtracted by the overlying strata insulated column for coal mining the most according to claim 1
Heavy method, it is characterised in that: the winning equipment in described step a is that coal-winning machine carries with scraper plate
Machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150883.3A CN105822305A (en) | 2016-03-15 | 2016-03-15 | Overlying strata settlement reducing method for coal mining through isolated grouting and bashing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610150883.3A CN105822305A (en) | 2016-03-15 | 2016-03-15 | Overlying strata settlement reducing method for coal mining through isolated grouting and bashing |
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| Publication Number | Publication Date |
|---|---|
| CN105822305A true CN105822305A (en) | 2016-08-03 |
Family
ID=56523885
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610150883.3A Pending CN105822305A (en) | 2016-03-15 | 2016-03-15 | Overlying strata settlement reducing method for coal mining through isolated grouting and bashing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593445A (en) * | 2016-12-02 | 2017-04-26 | 淮北矿业（集团）有限责任公司 | Old goaf underlying close distance coal seam strata-overlying isolation grouting filling exploitation method |
| CN106593444A (en) * | 2016-12-02 | 2017-04-26 | 淮北矿业（集团）有限责任公司 | Method for reducing mining vibration energy under hard rock stratum |
| CN110406951A (en) * | 2019-07-23 | 2019-11-05 | 华电郑州机械设计研究院有限公司 | A kind of method and apparatus controlling filling drag conveyor discharging window using ultrasonic distance measurement |
| CN110671148A (en) * | 2019-11-12 | 2020-01-10 | 中煤能源研究院有限责任公司 | One-hole multi-open ground grouting filling method above coal pillar |
| CN114737971A (en) * | 2022-04-18 | 2022-07-12 | 中国矿业大学 | Method for preventing and controlling mine earthquake and rock burst by overlying strata isolation grouting filling |
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| CN102704933A (en) * | 2012-05-25 | 2012-10-03 | 中国矿业大学 | Isolated-section grouting filling coal-mining method for mining overburden rock |
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2016
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106593445A (en) * | 2016-12-02 | 2017-04-26 | 淮北矿业（集团）有限责任公司 | Old goaf underlying close distance coal seam strata-overlying isolation grouting filling exploitation method |
| CN106593444A (en) * | 2016-12-02 | 2017-04-26 | 淮北矿业（集团）有限责任公司 | Method for reducing mining vibration energy under hard rock stratum |
| CN110406951A (en) * | 2019-07-23 | 2019-11-05 | 华电郑州机械设计研究院有限公司 | A kind of method and apparatus controlling filling drag conveyor discharging window using ultrasonic distance measurement |
| CN110671148A (en) * | 2019-11-12 | 2020-01-10 | 中煤能源研究院有限责任公司 | One-hole multi-open ground grouting filling method above coal pillar |
| CN114737971A (en) * | 2022-04-18 | 2022-07-12 | 中国矿业大学 | Method for preventing and controlling mine earthquake and rock burst by overlying strata isolation grouting filling |
| CN114737971B (en) * | 2022-04-18 | 2022-12-13 | 中国矿业大学 | Method for preventing and controlling mine earthquake and rock burst by overlying strata isolation, grouting and filling |
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Address after: 235047 No. 18, Wu Tong Road, Longhu Industrial Park, Huaibei Economic Development Zone, Anhui Applicant after: Exploration and exploration of the Polytron Technologies Inc Address before: 235047 No. 18, Wu Tong Road, Longhu Industrial Park, Huaibei Economic Development Zone, Anhui Applicant before: Huaibei mining (Group) Exploration Engineering Co., Ltd. |
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Application publication date: 20160803 |
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