断层活化对建(构)筑物保护煤柱留设的影响分析  

Analysis of Influence of Fault Activation on Protective Coal Pillar Presetting for Surface Buildings and Structures

作　　者：赵兵朝[1,2] 刘樟荣 王文彬 冯文生 

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]西安科技大学西部矿井开采及灾害防治教育部重点实验室,陕西西安710054 [3]延安市禾草沟煤业有限公司,陕西延安717306

出　　处：《矿业安全与环保》2015年第6期52-56,共5页Mining Safety & Environmental Protection

基　　金：国家自然科学基金项目(51304156);陕西省重点科技创新团队计划项目(2013KCT-16);陕西省重点实验室科学研究计划项目(13JS066)

摘　　要：现场开采实践表明,合理留设断层影响下的建(构)筑物保护煤柱是煤矿初步设计中需要考虑的重要问题之一。在分析采动断层活化的力学机理的基础上,结合各种产状的断层对采动地表移动变形的影响,给出了受断层影响下的建(构)筑物保护煤柱留设方法。研究表明,采动断层活化与断层面的应力状态、断层倾角、断层面岩石的黏聚力和内摩擦角,以及断层面上的流体压力等因素有关,断层对地表移动变形的影响与断层面的倾向和倾角有关。在进行断层影响下的建(构)筑物保护煤柱留设时,应当考虑到工作面开采参数、断层面的物理力学参数和开采方法等影响因素,综合采用数值模拟和相似模拟等手段确定保护煤柱的宽度。The mining practice showed that the rational presetting of the protective coal pillar for surface buildings and structures affected by faults was one of the most important problems to be considered in the preliminary design of a coal mine. Based on the analysis of mining dynamic mechanism of fault activation and combined with the influence of the faults in different occurrences on the surface movement and deformation, the pillar presetting method for surface buildings and structures affected by fault was put forward. The research showed that the mining-induced fault activation was related to the factors such as the stress state of the fault plane, the dip angle of the fault, the cohesion and internal friction angle of the rock on the fault plane, the fluid pressure on the fault plane and so on. In the presetting of the protective coal pillars for surface buildings and structures affected by faults, the influence factors such as the mining parameters of the working face, the physical and mechanical parameters of the fault plane, the mining method and so on should all be considered so as to determine the width of the protective coal pillar with both numerical and similar simulation methods.

关 键 词：断层活化 地表移动 台阶下沉 保护煤柱 建筑物下采煤 

分 类 号：TD822[矿业工程—煤矿开采]