CN107066754A - Without structure rock stratum caving zone dynamic development method for determining height in a kind of directly top - Google Patents
Without structure rock stratum caving zone dynamic development method for determining height in a kind of directly top Download PDFInfo
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- CN107066754A CN107066754A CN201710293179.8A CN201710293179A CN107066754A CN 107066754 A CN107066754 A CN 107066754A CN 201710293179 A CN201710293179 A CN 201710293179A CN 107066754 A CN107066754 A CN 107066754A
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- 239000011435 rock Substances 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 18
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- 238000005065 mining Methods 0.000 claims abstract description 14
- 239000003245 coal Substances 0.000 claims abstract description 11
- 230000006835 compression Effects 0.000 claims abstract description 7
- 238000007906 compression Methods 0.000 claims abstract description 7
- 238000004364 calculation method Methods 0.000 claims abstract description 4
- 238000012856 packing Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- 238000009825 accumulation Methods 0.000 claims description 4
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- 238000005303 weighing Methods 0.000 claims description 2
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- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- -1 siltstone Substances 0.000 description 1
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Abstract
The present invention relates to a kind of large-mining-height working surface caving zone dynamic development method for determining height, conventional operation face caving zone height calculation method is generally applicable to the working face that mining height is less than 3.5m, and the determination for large-mining-height working surface caving zone height has certain error, and internal high increase error is bigger with adopting, this method is particularly suitable for use in the determination of the weak consolidated formation large-mining-height working surface caving zone height in China mine of western in recent years.This method is thought because the mining height increase mined out space in goaf is big, the immediate roof thickness that caving rock fills up goaf needs is big, emitting backward rock simultaneously also has deadweight compression, the height of caving zone is further increased, it is thus determined that based on the deadweight compression changed over time by caved gangue, caving zone is highly determined be divided into base object model it is disrumpent feelings before, base object model is disrumpent feelings revolution and the compacting three phases analysis of base object model integral sinking, be that Support selection, coal winning technology design, preventing and treating top plate water damage etc. provide foundation.
Description
Technical field：
It is especially suitable the present invention relates to colliery thick seam large mining height working face caving zone dynamic development method for determining height
Without structure rock stratum caving zone dynamic development method for determining height in China is western and the weak consolidated formation of northwest development is directly pushed up.
Background technology
China's conventional operation face caving zone height calculation method be generally applicable to mining height be less than 3.5m working face, and for
The determination of large-mining-height working surface caving zone height has certain error, and as mining height increase error is bigger.
Conventional wisdom formula is only using lithology intensity as single Index Establishment, and it is linear relationship to obtain mining height and caving zone；Emit
Fall with the correlation not embodied highly with recovery time, actually caving zone development height is closely related with the time.
Caving zone, which is highly related to Support selection, coal winning technology design, the prevention of top plate water damage and control and working face, pacifies
Full high-efficiency mining, therefore accurate grasp large-mining-height working surface caving zone height, it is ensured that working face safety, in order exploitation.
The content of the invention
In order to solve the above problems, the present invention provides highly true without structure rock stratum caving zone dynamic development in a kind of directly top
Determine method, it is adaptable to which thick seam large mining height working face caving zone is highly determined, can accurately grasp working face mining initial stage until adopting
The distribution situation of caving zone in during empty slope stability is whole, provides and refers to for Support selection, coal winning technology design, the preventing and treating of top plate water damage
Lead.
The technical scheme is that：Without structure rock stratum caving zone dynamic development method for determining height in a kind of directly top,
Highly determined suitable for thick seam large mining height working face caving zone, specifically include following steps：
Step 1. determines the disrumpent feelings last stage caving zone height of base object model：Working face is straight in overburden of the goaf in recovery process
Connecing top, gradually goaf is filled in inbreak from bottom to top, and along with caved gangue from weight as mined-out area span increases rock stratum
Contracting, caved gangue height is added with caved gangue deadweight decrement, is stage caving zone height；
Step 2. determines the disrumpent feelings rotary phase caving zone height of base object model：Base object model gyration is touched can emit after cash to bottom
Fall spoil and be further applied load to be compressed to crush spoil, while the same generation along with deadweight decrement of caved gangue, by the first stage
Caving zone highly subtract caved gangue the stage deadweight decrement and base object model turn round accumulation decrement, be the stage
Caving zone height；
Step 3. determines top plate integral sinking packing stage caving zone height：Overlying structure rock stratum and erecting dense individual props spoil
Between interaction tend towards stability substantially, the upward support reaction of caved gangue and structure rock stratum and overlying are servo-actuated rock stratum and reach power
Balance.Because also having certain hole inside caved gangue, spoil has slow in deadweight and overlying rock load effect of inertia
Slow compacting phenomenon, it is that can obtain stage caving zone height to increase accumulated time on the basis of step 2.
Further, in the step 1 caving zone computational methods：
Before large-mining-height working surface base object model is disrumpent feelings, goaf space it is main in directly top with adopting with the spoil filling emitted.
Base object model is disrumpent feelings, and preceding gob caving band height is gradually increased to M+h by the M for exploiting the starting stage1, but the height of caved gangue
Less than or equal to M+h1, wherein initial height is：
Spoil deadweight decrement be：
In above formula, γtAnd Et *Application experience formula is calculated, and research shows erecting dense individual props spoil unit weight and springform measurer
There is the relation exponentially changed with the time：
Before base object model is disrumpent feelings, the highly i.e. direct top top height of caving zone is made up of two parts, and one is that direct top is first
Secondary inbreak, is defined as directly pushing up inbreak piling height, and two be the falling space that gravity accumulation compression is produced, then disrumpent feelings in base object model
Last stage directly pushes up caving zone：
In formula：H1For the disrumpent feelings preceding caving zone height of base object model, m；M is coal seam thickness, m；H is the initial height of spoil,
m；KpFor the initial broken swollen coefficient of caved gangue, 1.3-1.5 is taken；γtFor caved gangue unit weight, KN/m3；Et *Compressed for caved gangue
Modulus, MPa；T is recovery time, d；ΔH1tFor m ' days accumulating compression amount；V is the Poisson's ratio of caved gangue；E is spoil springform
Amount, MPa；M ' values are positive integer；
Further, the caving zone height calculation method described in the step 2 is：
In formula：H2For the disrumpent feelings rear caving zone height of base object model, m；QldIt is that base object model and overlying are servo-actuated rock stratum weight, KN；
γm′+1For the caved gangue m ' unit weights of+1 day, KN/m3；I is positive integer and i ＞=m '；
Further, the caving zone computational methods in the step 3 are：
In formula：H3For overall packing stage caving zone height, m；γm′+2+iFor the m ' unit weights of+2+i days, KN/m3；N is just
Integer and n ＞=i ＞=m '.
The beneficial effects of the present invention are compared with prior art, the large-mining-height working surface that the present invention is provided emits the present invention
Fall band and be dynamically determined method, while considering the deadweight compression performance of the big caused caved gangue in erecting dense individual props space and emitting
Fall band and the timing of exploitation, by caving zone distribution be divided into base object model it is disrumpent feelings before, base object model is disrumpent feelings revolution and base object model it is overall
Sink compacting three phases analysis, large-mining-height working surface caving zone is determined so as to accurate, be that Support selection, coal winning technology are set
Meter, preventing and treating top plate water damage etc. provide foundation.
Brief description of the drawings
Fig. 1 is erecting dense individual props spoil deadweight compact model schematic diagram of the present invention.
Fig. 2 is large-mining-height working surface caving zone distributed model schematic diagram of the present invention
Fig. 3 is large-mining-height working surface caving zone DYNAMIC DISTRIBUTION curve map of the present invention.
In figure：
1. directly top emits height, 3. basic roof construction rock stratum, 4. base object models after backward elemental height, the deadweight compression of 2. spoils
Caving zone height, 6. coal seams, 7. direct top, 8. base object models, 9. overlying strata after the preceding caving zone height of revolution, 5. base object model rotary deformations
Servo-actuated rock stratum, 10. base object models are disrumpent feelings crucial block, 11. gob caving bands.
Embodiment：
Below so that the method for the invention is in the practical application during large-mining-height working surface is exploited as an example, the present invention is made into one
Walk explanation.
Shown in Fig. 2, large-mining-height working surface caving zone distributed model schematic diagram of the invention, this method is mainly to determine and adopted greatly
Height working face gob caving band dynamic development height problem.Such as under certain mine first mining face, working seam is Jurassic system
YAN ' AN FORMATION 3-1 coals, coal seam average thickness 6.5m, design is mud using the exploitation of high working face full-seam mining fully mechanized mining, directly top
Rock, siltstone, base object model are middle sandstone, and rock and coal body uniaxial compressive strength belong to typical weak glue between 20-30MPa
Tie rock stratum.Using present invention determine that working face caving zone development height.This method specifically includes following steps：
Last stage caving zone height that step 1. base object model is disrumpent feelings：Basis firstCalculate because of coal seam
The elemental height of caving zone is produced, bulking factor takes 1.3, and coal seam thickness is 6.15m, show that caving zone is highly
26.65m；Next basisIt is 2.03m, the stage to calculate caved gangue deadweight decrement
Caving zone is highly 28.68m；
Rotary phase caving zone height that step 2. base object model is disrumpent feelings：Base object model gyration is touched can be to bottom inbreak cash after cash
Stone, which is further applied load, is compressed to crush spoil, while the same generation along with deadweight decrement of caved gangue, by emitting for first stage
Fall and subtract deadweight decrement and base object model revolution accumulation decrement of the caved gangue in the stage with height, according to formulaDraw the stage caving zone
Highly it is 28.43.
Step 3. top plate integral sinking packing stage caving zone height：Between overlying structure rock stratum and erecting dense individual props spoil
Interaction tend towards stability substantially, the upward support reaction of caved gangue and structure rock stratum and overlying are servo-actuated rock stratum and reach the flat of power
Weighing apparatus.Because also having certain hole inside caved gangue, spoil has slow in deadweight and overlying rock load effect of inertia
Phenomenon is compacted, according to formula
Increase on the basis of step 2 accumulated time be can obtain it is final stable after caving zone highly be 23.9m.
By accumulated time drawing face three phases caving zone height, 3 figures are obtained.
One embodiment of the present of invention is described in detail above, but the content is only the preferable implementation of the present invention
Example, it is impossible to be considered as the practical range for limiting the present invention.All equivalent changes made according to the present patent application scope and improvement
Deng within the patent covering scope that all should still belong to the present invention.
Claims (4)
1. without structure rock stratum caving zone dynamic development method for determining height in a kind of directly top, it is adaptable to thick seam large mining height working
Face caving zone is highly determined, it is characterised in that this method specifically includes following steps：
Step 1. determines the disrumpent feelings last stage caving zone height of base object model：Working face is directly pushed up in recovery process in overburden of the goaf
With mined-out area span increase rock stratum, gradually goaf is filled in inbreak from bottom to top, and compressed along with the deadweight of caved gangue,
Caved gangue height is added with caved gangue deadweight decrement, is stage caving zone height.
Step 2. determines the disrumpent feelings rotary phase caving zone height of base object model：Base object model gyration is touched can be to bottom inbreak cash after cash
Stone, which is further applied load, is compressed to crush spoil, while the same generation along with deadweight decrement of caved gangue, by emitting for first stage
Fall and subtract deadweight decrement and base object model revolution accumulation decrement of the caved gangue in the stage with height, be the stage inbreak
Band height.
Step 3. determines top plate integral sinking packing stage caving zone height：Between overlying structure rock stratum and erecting dense individual props spoil
Interaction tend towards stability substantially, the upward support reaction of caved gangue and structure rock stratum and overlying are servo-actuated rock stratum and reach the flat of power
Weighing apparatus；Because also having certain hole inside caved gangue, spoil has slow in deadweight and overlying rock load effect of inertia
Phenomenon is compacted, it is that can obtain stage caving zone height to increase accumulated time on the basis of step 2.
2. according to the method described in claim 1, it is characterised in that the computational methods of caving zone in the step 1：
Wherein initial height is：
Spoil deadweight decrement be：
In above formula,
So, the caving zone in the stage is highly：
In formula：H1- it is the disrumpent feelings preceding caving zone height of base object model, m；M- is coal seam thickness, m；H- is the initial height of spoil, m；
Kp- it is the initial broken swollen coefficient of caved gangue, take 1.3-1.5；γt- it is caved gangue unit weight, KN/m3；Et *- compressed for caved gangue
Modulus, MPa；T- is recovery time, d；ΔH1tFor m ' days accumulating compression amount；V is the Poisson's ratio of caved gangue；E is spoil elasticity
Modulus, MPa；M ' values are positive integer.
3. method according to claim 2, it is characterised in that the caving zone height calculation method in the step 2 is：
In formula：H2- it is the disrumpent feelings rear caving zone height of base object model, m；Qld- it is that base object model and overlying are servo-actuated rock stratum weight, KN；γm′+1
For the caved gangue m ' unit weights of+1 day, KN/m3；I is positive integer and i ＞=m '.
4. method according to claim 3, it is characterised in that the caving zone computational methods in the step 3 are：
In formula：H3- it is overall packing stage caving zone height, m；γm′+2+iFor the m ' unit weights of+2+i days, KN/m3；N is just whole
Number and n ＞=i ＞=m '.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162712A (en) * | 2018-08-30 | 2019-01-08 | 北京矿冶科技集团有限公司 | A method of control avalanche goaf above rock differential settlement |
| CN111428357A (en) * | 2020-03-20 | 2020-07-17 | 山西工程技术学院 | Method for determining maximum subsidence value of earth surface based on height of overburden rock residual free space |
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|---|---|---|---|---|
| RU2038476C1 (en) * | 1992-02-25 | 1995-06-27 | Акционерное общество Угольная компания "Прокопьевскуголь" | Coal deposit exploitation method |
| CN106014423A (en) * | 2016-06-24 | 2016-10-12 | 西安科技大学 | Short-distance coal seam roadway excavating and supporting method |
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-
2017
- 2017-04-27 CN CN201710293179.8A patent/CN107066754B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2038476C1 (en) * | 1992-02-25 | 1995-06-27 | Акционерное общество Угольная компания "Прокопьевскуголь" | Coal deposit exploitation method |
| CN106014423A (en) * | 2016-06-24 | 2016-10-12 | 西安科技大学 | Short-distance coal seam roadway excavating and supporting method |
| CN106600040A (en) * | 2016-12-02 | 2017-04-26 | 内蒙古伊泰煤炭股份有限公司 | Prediction method for dynamic growth height of caving zone with immediate roof internally including structural rock stratum |
Non-Patent Citations (1)
| Title |
|---|
| 吴锋锋: "厚煤层大采高综采采场覆岩破断失稳规律及控制研究", 万方中国学位论文数据库 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162712A (en) * | 2018-08-30 | 2019-01-08 | 北京矿冶科技集团有限公司 | A method of control avalanche goaf above rock differential settlement |
| CN111428357A (en) * | 2020-03-20 | 2020-07-17 | 山西工程技术学院 | Method for determining maximum subsidence value of earth surface based on height of overburden rock residual free space |
| CN111428357B (en) * | 2020-03-20 | 2023-03-28 | 山西工程技术学院 | Method for determining maximum subsidence value of earth surface based on height of overburden rock residual free space |
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