CN102330423B - Method for evaluating stability of newly built railway foundation on goaf - Google Patents
Method for evaluating stability of newly built railway foundation on goaf Download PDFInfo
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- CN102330423B CN102330423B CN201110203296.3A CN201110203296A CN102330423B CN 102330423 B CN102330423 B CN 102330423B CN 201110203296 A CN201110203296 A CN 201110203296A CN 102330423 B CN102330423 B CN 102330423B
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Abstract
The invention belongs to the technical field of coal mining collapse, and in particular relates to a method for evaluating the stability of a newly built railway foundation on a goaf. The method comprises three parts, namely goaf foundation stability analysis, roadbed residual subsidence deformation and mining influence evaluation. Compared with a calculation method recommended in Railway Geological Engineering Manual, the method has the advantages that: the method is more suitable for foundation stability evaluation of different mining methods or mining processes under various geological mining conditions, and the damage characteristic of overlying strata of coal beds and earth surface load influence depth are fully considered; and the method is suitable for foundation stability evaluation of different mining methods or mining processes under different geological mining conditions, is wide in application range and reasonable and reliable in evaluation result, and has good reference significance for foundation stability evaluation of newly built railways in the Lu'an mine district and other mine development goaf. The method has great significance for accelerating the development of the transportation industry of mining areas, solving the problem that the available land of the mining areas is gradually reduced and promoting the sustainable development of the mining area economy.
Description
Technical field:
The invention belongs to coal mining subsidence area technical field, specifically the evaluation method of newly built railway foundation stability on a kind of goaf.
Background technology
The Lushui River peace mining area is the important coal resources production base of China, and in recent years, along with coal and the fast development of its pass industry mutually, the communications and transportation pressure in mining area becomes clear day by day, and has had influence on the normal development of enterprise.And adopt sky (moving) district in mining area, gather, bring a difficult problem to the construction of mine railway, seriously restricted the sustainable development of Economy of Mine Regions.
The Lushui River peace mining area belongs to Qinshui coalfield, the existing main Shanxi Formation of Permian 3# high seam of adopting, and superstratum forms with sandstone, mud stone, Sandy Silt and Quaternary system loess formation, hard in overlying strata.Now main coal-mining method has layering to combine to adopt and once adopts entirely thickly with mining, and mining rate is high, and fltting speed is fast, certainly will cause in this case Overburden Rock Failure violent, is caving fault zone anormogenesis, brings hidden danger to the safe operation of earth's surface newly built railway.Therefore only analyzing on the basis of overlying strata structure, accurately estimating to be caving fault zone development height after adopt in different exploitation methods coal seam and ground load affects the degree of depth, could analyse the stability of goaf ground scientifically.
On goaf, during newly built railway, must consider the stability of ground, to guarantee the normal safe operation of railway.The computational methods that proposed the safe working degree of depth in < < Engineering Geological Location of Railway Direction handbook > >, its formula is:
H=K·M
In formula: H---the safe working degree of depth (m);
K---safety factor, K value can reference table 1;
M---ore bed extraction thickness (m).
Computationally secure mining depth K value table table 1
These computational methods think, when the seam mining degree of depth is to mine below the degree of depth at this, when the deep ratio in goaf meets table 1 and requires, think that above ground structure only produces slight deformation, and this kind of unlikely threat personal safety of distortion, only needs the maintenance that stops production.And it is known according to the universal law of goaf subsidence distortion, the sink deformation value on earth's surface, goaf not only dark with adopting of coal seam, adopt thick relevant, also relevant with coal seam overlying strata lithology, exploitation method and the surface load disturbance degree of depth, different geological mining conditions, impact on earth's surface and railway is widely different, only with deep being compared to, whether weigh base stabilization, be difficult to accurately reflect the long-time stability of ground, bring some problems to construction and the maintenance of newly built railway.
Use the design formulas of the present invention's safe working degree of depth before, do not take into full account the specific geological mining condition in mining area and production practice, exploitation method, result of calculation inevitably there will be deviation, brings hidden danger or unnecessary loss to goaf railway construction.Therefore, the goaf foundation stability evaluation method of formulation science is the problem to be solved in the present invention.
Summary of the invention:
For the deficiency in background technology, the evaluation method that the object of this invention is to provide newly built railway foundation stability on goaf, for goaf Analysis on Groundwork Stability provides the technical basis of science, avoid goaf to activate to earth's surface building and cause obvious mining influence.
The object of the invention is to complete by the following technical solutions:
An evaluation method for newly built railway foundation stability on goaf, is characterized in that: the method comprises goaf Analysis on Groundwork Stability, and the distortion of roadbed residual subsidence and mining influence are evaluated three parts;
Described goaf Analysis on Groundwork Stability comprises:
1) be caving the calculating of fault zone height: adopt ground drilling construction, according to the water injection test result of boring up and down dynamic water level, consumption of rinsing liquid and relevant interval in drilling process, determine and be caving slit band height, on this basis, be caving the law of development analysis of fault zone;
2) load affects depth calculation
By ground mechanical simulation, think, the subsidiary stress producing because of ground load in the ground of goaf equal respective depth place ground layer selfweight stress 5% time, can think that the impact that subsidiary stress produces this depth ground can ignore, this degree of depth is ground load affects depth H shadow;
In ground, selfweight stress is calculated with following formula:
σ
c=r1h1+r2h2+...+rnhn
In formula: r1, r2 ..., rn---be the unit weight of each layer of soil or rock from top to bottom in ground, kN/m3;
H1, h2 ..., hn---be the thickness of each layer of soil or rock from top to bottom in ground, m;
Ground subsidiary stress is calculated as follows:
σZ=kP0
In formula:
K---the vertical additional stress coefficient under various loads;
P0---act on the average additonal pressure of foundation bed, kN/m2;
While calculating ground subsidiary stress, should consider the impact of box car dynamic load, or dynamic load is reduced to equivalent dead-load; By uniform rectangular load, calculate ground subsidiary stress, in formula, vertical additional stress coefficient k can look into the vertical additional stress coefficient table value under uniform rectangular load angle point; Ground subsidiary stress increases and reduces with the degree of depth, and in ground, selfweight stress increases with the degree of depth; Calculate ground subsidiary stress and be equivalent to ground selfweight stress 5% place's degree of depth, being built-loading affects depth H shadow;
3) goaf Analysis on Groundwork Stability
When goaf minimum, adopt dark H and face to be greater than and be caving fault zone height H and split while affecting depth H shadow sum with built-loading, can think that goaf is caving no longer Yin Xinjia built-loading disturbance and re-moving of fault zone, that is:
H faces split+H of > H shadow
That is to say, when H faces split+H of > H shadow, goaf can be because distortion appears significantly concentrating in railway disturbance, and goaf ground is basicly stable, during newly built railway, can slip casting processing not carried out in goaf;
When H faces split+H of < H shadow, under surface load disturbance, goaf plays pendulum down, in railway operation process, is prone to comparatively violent concentrated distortion, and in this case, grouting and reinforcing is carried out in reply Along Railway goaf;
Described roadbed residual subsidence distortion comprises: according to Analysis on Groundwork Stability result, adopt probability integration process to carry out earth's surface and roadbed residual subsidence distortion expectation; For the goaf of base stabilization, only consider earth's surface residual subsidence distortion; For unstabilized goaf, according to production practice, exploitation method, calculate that ground is subject to disturbance and subsidence deformation values under Activation;
Described mining influence evaluation comprises: according to roadbed residual subsidence deformation result, further analyze foundation settlement value and settling rate, in conjunction with train operation standard, carry out the analysis of roadbed maintenance support, propose corresponding resist technology measure.
Adopt technique scheme, compared with prior art, advantage of the present invention is:
Compare with the computational methods of recommending in < < railway Geological Engineering handbook > >, the present invention is more suitable for different exploitation methods under various geological mining conditions, the foundation stability evaluation of production practice, the damage feature and the surface load that have taken into full account superstratum, coal seam affect the degree of depth, the present invention is applicable to different exploitation methods under different geological mining conditions, the foundation stability evaluation of production practice, applied widely, evaluation result is reasonable, reliably, the foundation stability evaluation of the Lushui River peace mining area and other mining areas being carried out to goaf newly built railway has good reference.To accelerating the development of mining area transportation, alleviate the problem that mining area can utilize soil increasingly to reduce, promote the sustainable development of Economy of Mine Regions to have great importance.
The specific embodiment:
Below just by an embodiment, be further described the utility model, the utility model is not limited only to described embodiment.
The coal-based artificial oil special purpose railroad of Lu An group is positioned to the west of remaining my coal industry field square, above remaining my south, colliery two north, the exploiting field wings, there are S2105, S2106, tri-work planes of S2107 in below, working seam is No. 3 coals of Shanxi group, coal seam thickness is 5.31～5.35m, average out to 5.33m, 2.2～12.5 °, inclination angle, on average adopt dark 511m, wherein Quaternary system loess formation thickness is 28.40～74.65m.
As calculated, the development height that goaf, one's respective area is caving fault zone is 117.2m, box car load affects the degree of depth (H shadow) for 31m, both sums are 148.2m, it is 482m that coal seam, one's respective area minimum is adopted dark, therefore, the load of newly built railway all can not make goaf that larger differential settlement occurs, and earth's surface there will not be discontinuous concentrated distortion.According to sink deformation, estimate, the maximum sinking 1999mm of roadbed, maximum inclination 10mm/m, maximum horizontal moves 662mm, maximum horizontal distortion 5.3mm/m, railway will be subject to subsidence deformation effect, need increase in advance to roadbed, widen in advance processing, regularly to circuit along slope, track lifting, track lining, string rail.
Claims (1)
1. an evaluation method for newly built railway foundation stability on goaf, is characterized in that: the method comprises goaf Analysis on Groundwork Stability, and the distortion of roadbed residual subsidence and mining influence are evaluated three parts;
Described goaf Analysis on Groundwork Stability comprises:
1) be caving the calculating of fault zone height: adopt ground drilling construction, according to the water injection test result of boring up and down dynamic water level, consumption of rinsing liquid and relevant interval in drilling process, determine and be caving slit band height, on this basis, be caving the law of development analysis of fault zone;
2) load affects depth calculation
By ground mechanical simulation, think, the subsidiary stress producing because of ground load in the ground of goaf equal respective depth place ground layer selfweight stress 5% time, can think that the impact that subsidiary stress produces this depth ground can ignore, this degree of depth is ground load affects depth H
shadow;
In ground, selfweight stress is calculated with following formula:
σ
c=r
1h
1+r
2h
2+...+r
nh
n
In formula: r
1, r
2..., r
n---be the unit weight of each layer of soil or rock from top to bottom in ground, kN/m
3;
H
1, h
2..., h
n---be the thickness of each layer of soil or rock from top to bottom in ground, m;
Ground subsidiary stress is calculated as follows:
σ
Z=kP
0
In formula:
K---the vertical additional stress coefficient under various loads;
P
0---act on the average additonal pressure of foundation bed, kN/m
2;
While calculating ground subsidiary stress, should consider the impact of box car dynamic load, or dynamic load is reduced to equivalent dead-load; By uniform rectangular load, calculate ground subsidiary stress, in formula, vertical additional stress coefficient k can look into the vertical additional stress coefficient table value under uniform rectangular load angle point; Ground subsidiary stress increases and reduces with the degree of depth, and in ground, selfweight stress increases with the degree of depth; Calculate ground subsidiary stress and be equivalent to ground selfweight stress 5% place's degree of depth, being built-loading affects depth H
shadow;
3) goaf Analysis on Groundwork Stability
When goaf minimum is adopted dark H
facebe greater than and be caving fault zone height H
splitaffect depth H with built-loading
shadowduring both sums, can think that goaf is caving no longer Yin Xinjia built-loading disturbance and re-moving of fault zone, that is:
H
face> H
split+ H
shadow
That is to say, work as H
face> H
split+ H
shadowtime, goaf can be because distortion appears significantly concentrating in railway disturbance, and goaf ground is basicly stable, during newly built railway, can slip casting processing not carried out in goaf;
Work as H
face< H
split+ H
shadowtime, under surface load disturbance, goaf plays pendulum down, in railway operation process, is prone to comparatively violent concentrated distortion, and in this case, grouting and reinforcing is carried out in reply Along Railway goaf;
Described roadbed residual subsidence distortion comprises: according to Analysis on Groundwork Stability result, adopt probability integration process to carry out earth's surface and roadbed residual subsidence distortion expectation; For the goaf of base stabilization, only consider earth's surface residual subsidence distortion; For unstabilized goaf, according to production practice, exploitation method, calculate that ground is subject to disturbance and subsidence deformation values under Activation;
Described mining influence evaluation comprises: according to roadbed residual subsidence deformation result, further analyze foundation settlement value and settling rate, in conjunction with train operation standard, carry out the analysis of roadbed maintenance support, propose corresponding resist technology measure.
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| CN201110203296.3A CN102330423B (en) | 2011-07-20 | 2011-07-20 | Method for evaluating stability of newly built railway foundation on goaf |
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| CN102330423B true CN102330423B (en) | 2014-04-09 |
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| CN111753404A (en) * | 2020-06-02 | 2020-10-09 | 中煤科工开采研究院有限公司 | Method for calculating additional stress of double-layer medium foundation in thin unconsolidated layer coal mining subsidence area |
| CN111767642A (en) * | 2020-06-02 | 2020-10-13 | 中煤科工开采研究院有限公司 | Method and device for evaluating foundation stability of thin unconsolidated layer coal mining subsidence area |
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| CN103088803B (en) * | 2013-01-31 | 2015-03-18 | 青岛理工大学 | Method for identifying collapse factors caused by karst collapse |
| CN103541376B (en) * | 2013-10-10 | 2015-07-01 | 金川集团股份有限公司 | Foundation deformation prediction method for coal mining subsidence area foundation under condition of repeated mining |
| CN103513281B (en) * | 2013-10-23 | 2015-12-02 | 中国矿业大学 | Solid filling coal mining overlying strata water flowing fractured zone development height method for predicting |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003129462A (en) * | 2001-10-25 | 2003-05-08 | Toa Harbor Works Co Ltd | Method for evaluating coefficient of earth pressure at rest of ground into which pile or sand compaction pile is driven, and method for evaluating coefficient of earth pressure at rest of sand compaction pile itself in ground into which sand compaction pile is driven |
| KR20050047018A (en) * | 2003-11-15 | 2005-05-19 | 이근호 | Method for processing underground inclination data in embankment, recording medium recorded with same, and apparatus using same |
| CN101591988A (en) * | 2009-06-30 | 2009-12-02 | 中国电力工程顾问集团公司 | The base stabilization appraisal procedure in mining influence district and upright tower method |
| CN101806054A (en) * | 2010-04-02 | 2010-08-18 | 中铁二局股份有限公司 | Method for estimating stability of house pillar type goaf under highway |
-
2011
- 2011-07-20 CN CN201110203296.3A patent/CN102330423B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003129462A (en) * | 2001-10-25 | 2003-05-08 | Toa Harbor Works Co Ltd | Method for evaluating coefficient of earth pressure at rest of ground into which pile or sand compaction pile is driven, and method for evaluating coefficient of earth pressure at rest of sand compaction pile itself in ground into which sand compaction pile is driven |
| KR20050047018A (en) * | 2003-11-15 | 2005-05-19 | 이근호 | Method for processing underground inclination data in embankment, recording medium recorded with same, and apparatus using same |
| CN101591988A (en) * | 2009-06-30 | 2009-12-02 | 中国电力工程顾问集团公司 | The base stabilization appraisal procedure in mining influence district and upright tower method |
| CN101806054A (en) * | 2010-04-02 | 2010-08-18 | 中铁二局股份有限公司 | Method for estimating stability of house pillar type goaf under highway |
Non-Patent Citations (6)
| Title |
|---|
| 张志沛等.某高速公路下伏煤矿采空区稳定性分析.《煤田地质与勘探》.2005,(第01期), |
| 某高速公路下伏煤矿采空区稳定性分析;张志沛等;《煤田地质与勘探》;20050225(第01期);第46-48页 * |
| 滕永海等.老采空区地基稳定性评价.《煤炭学报》.1997,(第05期), |
| 老采空区地基稳定性评价;滕永海等;《煤炭学报》;19971025(第05期);第504-508页 * |
| 老采空区高层建筑物地基稳定性综合评价;钱自卫等;《湖南科技大学学报(自然科学版)》(第01期);第58-62页 * |
| 钱自卫等.老采空区高层建筑物地基稳定性综合评价.《湖南科技大学学报(自然科学版)》.(第01期), |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111753404A (en) * | 2020-06-02 | 2020-10-09 | 中煤科工开采研究院有限公司 | Method for calculating additional stress of double-layer medium foundation in thin unconsolidated layer coal mining subsidence area |
| CN111767642A (en) * | 2020-06-02 | 2020-10-13 | 中煤科工开采研究院有限公司 | Method and device for evaluating foundation stability of thin unconsolidated layer coal mining subsidence area |
| CN111753404B (en) * | 2020-06-02 | 2021-02-09 | 中煤科工开采研究院有限公司 | Method for calculating additional stress of double-layer medium foundation in thin unconsolidated layer coal mining subsidence area |
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