承压水体上邻近断层开采底板岩层破裂与导水特征  

Fracture and water conducting characters of floor aquifer strata due to mining vicinity to the fault above confined aquifer

作　　者：李飞[1] 王金安[1] 魏现昊[1] 

机构地区：[1]北京科技大学土木与环境工程学院,北京100083

出　　处：《中国安全生产科学技术》2014年第5期68-73,共6页Journal of Safety Science and Technology

基　　金：国家重点基础研究发展计划(973)项目(2010CB731500);国家自然科学基金项目(41172264)

摘　　要：大部分煤矿都不程度的受到承压水的影响,承压水的突出绝大多数与断层有直接的关系。以山西某矿承压水体上煤层开采为背景,分析了断层带突水的影响因素及突水机理;通过对矿区水文地质的综合评价,对矿区潜在威胁的断层建立离散元数值模型,进行流固耦合数值分析,以探究邻近构造带底板岩层的应力分布特点及破裂和渗流特征。通过计算表明,随着工作面逐步开采邻近断层,底板破裂深度增大,沿断层面两侧岩体发生滑移错动并伴随渗流发生。Most coal mines are affected by confined aquifer , and water rush-in has a direct relationship with the fault.Based on coal mining above confined aquifer in a coal mine of Shanxi Province , the affecting factors and the mechanism of water rush-in were analyzed .Through comprehensive evaluation of hydrogeological conditions of the mine, a discrete element numerical simulation of fault was established to reveal the characteristics about the distri -bution of stress , the rupture regularity of stratum and the seepage with respect to different mining advances .It showed that , with the mining face advancing to the fault , the fracture depth of floor strata increases and both faces of fault begin to slip and seep .

关 键 词：承压水 断层 保护煤柱 

分 类 号：X936[环境科学与工程—安全科学]