CN105257293B - A kind of shallow embedding gas transmission line push the recovery method of coal - Google Patents
A kind of shallow embedding gas transmission line push the recovery method of coal Download PDFInfo
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- CN105257293B CN105257293B CN201510615096.7A CN201510615096A CN105257293B CN 105257293 B CN105257293 B CN 105257293B CN 201510615096 A CN201510615096 A CN 201510615096A CN 105257293 B CN105257293 B CN 105257293B
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- 239000003245 coal Substances 0.000 title claims abstract description 50
- 230000005540 biological transmission Effects 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000011084 recovery Methods 0.000 title claims abstract description 19
- 238000005065 mining Methods 0.000 claims abstract description 20
- 239000000725 suspension Substances 0.000 claims abstract description 18
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 230000010354 integration Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 2
- 239000011435 rock Substances 0.000 claims description 2
- 238000000605 extraction Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 239000004568 cement Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Pipeline Systems (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of shallow embedding gas transmission line pushes the recovery method of coal, comprises the following steps：(1) establish surface subsidence curvilinear equation W, predict after resource exploitation earth's surface along pipeline direction sinking situation；(2) shallow embedding ground gas transmission line moment of flexure and pipeline maximum stress in bend are calculated；(3) gas transmission line needs scope of protection with determining shallow embedding；(4) protection domain determined according to step 3 slings Subsidence Area pipeline along pipeline direction erecting suspension bridge；(5) coal resources under pipeline are exploited in a usual manner, and remove suspension bridge after depression is stable, are repeated the above steps before next working face extraction, until all resource recoveries in this exploiting field finish.The present invention dynamic deformation can influence according to caused by shallow embedding gas transmission pipeline during exploitation of coal resources; using suspension bridge overhead pipe method, to shallow embedding gas transmission line is protected, so as to produce the coal resources held up under pipeline using normal mining type.
Description
Technical field
The present invention relates to a kind of recovery method for pressing coal, specifically a kind of shallow embedding gas transmission line push the exploitation side of coal
Method, belong to field of coal mining.
Background technology
The subsidence that coal mining induces can cause greatly to destroy to ground surface environment and structures.China is defeated over long distances
Gas pipeline has passed through China Main Coalfields distributed area, with the continuous enlargement of Coal Mining Area area, increasing appendix
Line will be influenceed by depression is adopted.Pipeline inner high voltage gas is inflammable, explosive, once the leakage of generation gas or line break easily trigger
Major accident, great casualties and property loss are caused, is seriously endangered social production and national economy.
Most of for shallow embedding the gas transmission line of existing gas transmission line, its guard method, which mainly uses to stay, sets protection coal pillar.Should
Method is according to shallow embedding gas transmission line and seam contrast in process of coal mining, it is contemplated that pipeline protection coal column scope,
Stay and set protection coal pillar and do not exploit, gas transmission line is not influenceed by Sbusidence Damage with making shallow embedding.This method be primarily present with
Lower shortcoming：
(1) shallow embedding gas transmission line there is randomness with respect to the arrangement of coal mining working face, the pipeline in coal mining
Protection coal pillar will make a big impact to the arrangement of coal mining working face and mining area colliery expanding design.
(2) generally shallow embedding protection coal pillar along gas transmission line it is wider, generally the width of protection coal pillar exists
1000m or so, this will cause the waste of a large amount of coal resources.
(3) shallow embedding along gas transmission line holding up for coal resources the production to mining area and economic benefit are brought into huge shadow
Ring, influence the sustainable development in mining area.
The content of the invention
It is an object of the invention to provide a kind of shallow embedding gas transmission line pushes the recovery method of coal, and this method can either have
Effect protection gas transmission line, and can high efficiency exploitation pipeline push coal.
To achieve the above object, a kind of shallow embedding gas transmission line push the recovery method of coal, comprise the following steps：
A. according to terrene shift observing data after other Regional Coal resource recoveries of mining area, gas transmission line moves with determining shallow embedding
Dynamic and deformation parameter, surface subsidence curvilinear equation W is established using probability integration process, predict after resource exploitation earth's surface along pipeline direction
Sinking situation；
B. buried pipeline moment of flexure and maximum stress in bend are calculated according to above-mentioned surface subsidence curvilinear equation, according to continuous beam
Flexure theory can obtain buried pipeline calculation of Bending Moment equation：
In formula, E is the tensile modulus of elasticity of pipeline, and I is pipe cross-sectional the moment of inertia, and pipeline maximum stress in bend is：
D is the radius of pipe cross-sectional in formula；
C. shallow buried pipeline axial tension stress is determined according to maximum stress in bend, shallow embedding is determined with reference to pipeline allowable tensile stress
Ground gas transmission line needs scope of protection, and the calculation formula of axial tension stress is along buried pipeline in Subsidence Area：
σn(l)=σn0+σ(l)
σ in formulan0For the initial axial tension stress of pipeline, can be obtained according to the internal pressure and working condition of pipeline, pipeline allows to draw
Stress is [σ], works as σn(l) during ＞ [σ], the axial tension stress of correspondence position pipeline has exceeded allowable tensile stress, thereby determines that out
Buried pipeline needs to take the scope of safeguard measure；Work as σn(l) during ＜ [σ], the axial tension stress of correspondence position pipeline, which is less than, to be held
Perhaps tension, herein pipeline safeguard measure need not be set；
D. the protection domain determined according to step c slings Subsidence Area pipeline along pipeline direction erecting suspension bridge；
E. the pressure coal under pipeline is exploited in a usual manner, until the working face resource recovery finishes；
F. suspension bridge is removed after above-mentioned working face subsidence is stable；Repeat step a to step e, completes next work
Make face exploitation of coal resources work；So persistently cut coal resource, until all working face resource exploitation in this exploiting field is complete
Finish.
The present invention dynamic deformation can influence according to caused by shallow embedding gas transmission pipeline during exploitation of coal resources, using outstanding
Cable bridge overhead pipe to shallow embedding protect by gas transmission line, is held up so as to be produced using conventional mining type under pipeline
Coal resources.Suspension bridge is set up simply, and critical piece can reuse；After subsidence is stable, suspension bridge is removed, due to
Pipeline itself has certain tensile properties, there will be no burst to deform, need not generally banket support, and process is more simple
It is single；Erecting suspension bridge 1% of increased expense all or less than production cost, the flood tide mining pressed coal under pipeline can but be gone out
Come, there is high economic benefit.
Brief description of the drawings
Fig. 1 is the schematic diagram of the specific embodiment of the present invention；
Fig. 2 is the schematic diagram of support base in the present invention；
In figure：1st, support pier, 2, suspention cable wire, 3, support pier foundation, 4, pipeline, 5, hoist cable, 6, pipeline support seat, 61,
Collet, 62, upper lid, 63, groove, 64, bolt, 65, hanger.
Embodiment
The invention will be further described below in conjunction with the accompanying drawings.
A kind of shallow embedding gas transmission line push the recovery method of coal, comprise the following steps：
A. according to terrene shift observing data after other Regional Coal resource recoveries of mining area, gas transmission line moves with determining shallow embedding
Dynamic and deformation parameter, surface subsidence curvilinear equation W is established using probability integration process, predict after resource exploitation earth's surface along pipeline direction
Sinking situation；
B. buried pipeline moment of flexure and maximum stress in bend are calculated according to above-mentioned surface subsidence curvilinear equation, according to continuous beam
Flexure theory can obtain buried pipeline calculation of Bending Moment equation：
In formula, E is the tensile modulus of elasticity of pipeline, and I is pipe cross-sectional the moment of inertia, and pipeline maximum stress in bend is：
D is the radius of pipe cross-sectional in formula；
C. shallow buried pipeline axial tension stress is determined according to maximum stress in bend, shallow embedding is determined with reference to pipeline allowable tensile stress
Ground gas transmission line needs scope of protection, and the calculation formula of axial tension stress is along buried pipeline in Subsidence Area：
σn(l)=σn0+σ(l)
σ in formulan0For the initial axial tension stress of pipeline, can be obtained according to the internal pressure and working condition of pipeline, pipeline allows to draw
Stress is [σ], works as σn(l) during ＞ [σ], the axial tension stress of correspondence position pipeline has exceeded allowable tensile stress, thereby determines that out
Buried pipeline needs to take the scope of safeguard measure；Work as σn(l) during ＜ [σ], the axial tension stress of correspondence position pipeline, which is less than, to be held
Perhaps tension, herein pipeline safeguard measure need not be set；
D. the protection domain determined according to step c slings Subsidence Area pipeline along pipeline direction erecting suspension bridge；
E. the pressure coal under pipeline is exploited in a usual manner, until the working face resource recovery finishes；
F. suspension bridge is removed after above-mentioned working face subsidence is stable；Repeat step a to step e, completes next work
Make face exploitation of coal resources work；So persistently cut coal resource, until all working face resource exploitation in this exploiting field is complete
Finish.
The present invention dynamic deformation can influence according to caused by shallow embedding gas transmission pipeline during exploitation of coal resources, using outstanding
Cable bridge overhead pipe to shallow embedding protect by gas transmission line, is held up so as to be produced using conventional mining type under pipeline
Coal resources.Suspension bridge is set up simply, and critical piece can reuse；After subsidence is stable, suspension bridge is removed, due to
Pipeline itself has certain tensile properties, there will be no burst to deform, need not generally banket support, and process is more simple
It is single；Erecting suspension bridge 1% of increased expense all or less than production cost, the flood tide mining pressed coal under pipeline can but be gone out
Come, there is high economic benefit.
Surface movements and deformation preferred parameter includes in the step a：Subsidence factor, displacement factor, flex point skew
Away from, seam mining influence angle, rock mass modulus of elasticity and intensity, these preferred parameters can reflect Subsidence Area surface movement comprehensively
And deformation.
Fig. 1 be step d described in suspension bridge a preferred embodiment, including support pier 1 and suspention cable wire 2, the branch
Support pier 1, which is arranged on gas transmission line 4, needs the both ends of protection zone, is provided with support pier foundation 3 below, support pier foundation 3 is defeated
The both sides of gas pipeline 4 are symmetrical arranged, and gas transmission line 4 passes through between two support pier foundations 3, and suspention cable wire 2 is erected at two branch
Between supportting pier 1, hoist cable 5 is suspended on suspention cable wire 2.The support pier 1 uses cement structures, the suspension bridge low cost.
Further, hoist cable 5 is sling gas transmission line 4 by pipeline support seat 6, and pipeline support seat 6 can effectively be protected defeated
Gas pipeline 4.
Fig. 2 is a preferred scheme of pipeline support seat 6, including collet 61 and upper lid 62, the collet 61 and upper lid 62
On be respectively arranged to dispose the groove 63 of pipeline, collet 61 and upper lid 62 connected by bolt 64, and upper lid 62 sets hanger 65；
It is not only convenient but also firm so to sling gas transmission line 4.Lid can not also be used, base top edge directly sets some hangers, so
Need the hoist cable of respective numbers.
Claims (5)
1. a kind of shallow embedding gas transmission line push the recovery method of coal, it is characterised in that comprise the following steps：
A. according to terrene shift observing data after other Regional Coal resource recoveries of mining area with determining shallow embedding gas transmission line movement with
Deformation parameter, surface subsidence curvilinear equation W is established using probability integration process, earth's surface is sunk along pipeline direction after predicting resource exploitation
Situation；
B. buried pipeline moment of flexure and maximum stress in bend are calculated according to above-mentioned surface subsidence curvilinear equation, according to continuous deflection of beam
Theory can obtain buried pipeline calculation of Bending Moment equation：
<mrow>
<mi>M</mi>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mi>E</mi>
<mi>I</mi>
<mfrac>
<mrow>
<msup>
<mi>d</mi>
<mn>2</mn>
</msup>
<mi>W</mi>
</mrow>
<mrow>
<msup>
<mi>dl</mi>
<mn>2</mn>
</msup>
</mrow>
</mfrac>
</mrow>
In formula, E is the tensile modulus of elasticity of pipeline, and I is pipe cross-sectional the moment of inertia, and pipeline maximum stress in bend is：
<mrow>
<mi>&sigma;</mi>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
<mo>=</mo>
<mfrac>
<mrow>
<mi>M</mi>
<mrow>
<mo>(</mo>
<mi>l</mi>
<mo>)</mo>
</mrow>
<mi>d</mi>
</mrow>
<mi>I</mi>
</mfrac>
</mrow>
D is the radius of pipe cross-sectional in formula；
C. shallow buried pipeline axial tension stress is determined according to maximum stress in bend, it is with determining shallow embedding defeated with reference to pipeline allowable tensile stress
Gas pipeline needs scope of protection, and the calculation formula of axial tension stress is along buried pipeline in Subsidence Area：
σn(l)=σn0+σ(l)
σ in formulan0For the initial axial tension stress of pipeline, can be obtained according to the internal pressure and working condition of pipeline, pipeline allowable tensile stress
For [σ], work as σn(l) during ＞ [σ], the axial tension stress of correspondence position pipeline has exceeded allowable tensile stress, thereby determines that out buried
Pipeline needs to take the scope of safeguard measure；Work as σn(l) during ＜ [σ], the axial tension stress of correspondence position pipeline, which is less than, allows to draw
Stress, herein pipeline safeguard measure need not be set；
D. the protection domain determined according to step c slings Subsidence Area pipeline along pipeline direction erecting suspension bridge；
E. the pressure coal under pipeline is exploited in a usual manner, until the working face resource recovery finishes；
F. suspension bridge is removed after above-mentioned working face subsidence is stable；Repeat step a to step e, completes next working face
Exploitation of coal resources works；So persistently cut coal resource, until all working face resource exploitation in this exploiting field finishes.
2. shallow embedding according to claim 1 gas transmission line push the recovery method of coal, it is characterised in that the step a
Middle surface movements and deformation preferred parameter is：Subsidence factor, displacement factor, deviation of inflection point, seam mining influence angle, rock
The modulus of elasticity and intensity of body.
3. shallow embedding according to claim 2 gas transmission line push the recovery method of coal, it is characterised in that the step d
Centre suspension cord bridge includes support pier (1) and suspention cable wire (2), and the support pier (1), which is arranged on gas transmission line (4), needs area to be protected
Domain both ends, support pier foundation (3) is provided with below, support pier foundation (3) is symmetrical arranged in gas transmission line (4) both sides, appendix
Line (4) passes through between two support pier foundations (3)；Suspention cable wire (2) is erected between two support piers (1), and pipeline (4) is logical
Hoist cable (5) is crossed to be suspended on suspention cable wire (2).
4. shallow embedding according to claim 3 gas transmission line push the recovery method of coal, it is characterised in that hoist cable (5) is logical
Pipeline support seat (6) is crossed to sling gas transmission line (4).
5. shallow embedding according to claim 4 gas transmission line push the recovery method of coal, it is characterised in that the pipeline branch
Supportting seat (6) includes collet (61) and upper lid (62), is respectively arranged to dispose appendix on the collet (61) and upper lid (62)
The groove (63) of line (4), collet (61) and upper lid (62) are connected by bolt (64), and upper lid (62) sets hanger (65).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510615096.7A CN105257293B (en) | 2015-09-24 | 2015-09-24 | A kind of shallow embedding gas transmission line push the recovery method of coal |
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| CN201510615096.7A CN105257293B (en) | 2015-09-24 | 2015-09-24 | A kind of shallow embedding gas transmission line push the recovery method of coal |
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| CN105257293A CN105257293A (en) | 2016-01-20 |
| CN105257293B true CN105257293B (en) | 2017-12-08 |
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| WO2007073114A1 (en) * | 2005-12-22 | 2007-06-28 | Gmg Co., Ltd. | Apparatus and sensor for measuring strain of underground pipe |
| CN202037240U (en) * | 2011-01-10 | 2011-11-16 | 中煤第一建设有限公司 | Hanging fixture die |
| CN103383243B (en) * | 2012-05-04 | 2016-12-14 | 中国石油天然气股份有限公司 | Method and system for monitoring displacement of oil and gas pipeline in frozen soil area |
| CN103090110B (en) * | 2013-01-28 | 2015-04-22 | 中国矿业大学(北京) | Trample-deformation-resistant adjusting device for shallow-buried gas pipe |
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Address after: 221000 research and development center of mine safety technology and equipment at China University of Mining and Technology, Xuzhou, Xuzhou, Jiangsu Patentee after: China University of Mining & Technology Address before: 221000 Xuzhou high tech Industrial Development Zone,, Xuzhou Road, China University of Mining and Technology, mine safety technology and equipment research and Development Center Patentee before: China University of Mining & Technology |