断层构造对煤层底板突水的影响分析
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摘要
在原岩应力、地质构造、地下水等因素基础上,从应力场和渗流场共同作用的角度出发,研究含底板岩体在内的采场岩体系统的变形与破坏。研究结果表明,随着工作面向前推进,底板岩层的破坏深度和范围逐渐增加,底板岩层中水平应力低于承压水压力的深度也逐步增大。随着开挖接近断层,断层对应力分布情况的影响越来越明显,最终在断层处造成突水。为了预防底板突水的发生,合理留设防水煤岩柱是必要的工程措施。
Fault structure is a main factor to make water inrush in the coal mining operation. The deformation and failure of stope rock body system(include floor rock) to coal floor inrush water problew is researched from the view of stress fields and seepage field based on rock stress, geological structure, ground water, mining influence and so on. Research results show that the failure depth and the range of floor strata and depth of the horizontal stress lower the pressure of the artesian water increased gradually with working face developing.When excavation close the fault, its influence to distribution of stress is more and more obviously and causes water inrush at last. In order to prevent the occurrence of floor process water, reasonable pillar leaving is an essential engineering measure.
Fault structure is a main factor to make water inrush in the coal mining operation. The deformation and failure of stope rock body system(include floor rock) to coal floor inrush water problew is researched from the view of stress fields and seepage field based on rock stress, geological structure, ground water, mining influence and so on. Research results show that the failure depth and the range of floor strata and depth of the horizontal stress lower the pressure of the artesian water increased gradually with working face developing.When excavation close the fault, its influence to distribution of stress is more and more obviously and causes water inrush at last. In order to prevent the occurrence of floor process water, reasonable pillar leaving is an essential engineering measure.
引文
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2邵爱军,刘唐生,邵太升,等.煤矿地下水与底板突水[M].北京:地震出版社,2001
3徐曾和,徐小荷.论矿业工程中的流-固耦合渗流问题[J].中国矿业,1996,15(3):53～60.
4梁冰,孙可明,薛强.地下工程中的流-固耦合问题的探讨[J].辽宁工程技术大学学报,2001,20(2):129～134
5王吉松,关英斌.煤层底板突水研究的理论和方法[J].煤炭技术,2006,25(1):113～115
6黎良杰.采场底板突水机理的研究[D].徐州:中国矿业大学,1995
7CoetzeeM.J.etc.FLAC BASICS[C].ITA SCA Consulting Graup Inc.1993.
8Itasca Consulting Group Inc.FLAC-3D(Fast Lagrangian Analysis ofContinua in3Dimensions),Version2.00,Users Manual(VolumeⅤ)[R].USA:Itasca Consulting Group Inc,1997
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