逆断层下盘开采断层煤柱应力演化及断层活化规律研究  

Thrust Fault Footwall Mining Pillar Stress Evolution Patterns and Fault Activation

作　　者：刘淑文[1] 孙洪浩[1] 徐传伟[2] 

机构地区：[1]山东能源新汶矿业集团翟镇煤矿,山东泰安271200 [2]山东科技大学,山东泰安271000

出　　处：《煤》2017年第7期1-4,共4页Coal

基　　金：国家自然科学基金资助项目(51574155);泰安市科技发展计划(2015ZC1058)

摘　　要：以逆断层为研究对象,通过FLAC^(3D)数值模拟软件建立由下盘向逆断层开采模型,研究了逆断层下盘开采时不同尺寸断层煤柱内支承应力演化和断层活化规律。结果表明:逆断层对采动应力的阻隔效应显著,随断层煤柱尺寸减小,断层煤柱内易形成高应力集中,导致煤柱塑性失稳,易诱发动力灾害;断层面剪切应力与法向应力比值能较好的反应断层受开采扰动程度,比值最大时断层活化危险性最大;受开采扰动,断层由高位向低位逐步活化,两盘相对位移量增大,易诱发矿井灾害。To reverse fault as the research object,through FLAC3D numerical simulation software to establish a mining model from the footwall to thrust,thrust was studied different sizes in the footwall mining fault bearing stress evolution in coal pillar and fault activation patterns. The results show that the thrust of mining-induced stress blocking effect significantly,size of coal pillar is reduced,the fault fault leads to high stress concentration in coal pillar,lead to the plastic instability of coal pillar,easily induced dynamic disasters; The ratio of shear stress to normal stress ratio can be better than that of the normal stress ratio. The fault is gradually activated by the high and low level,and the relative displacement of the two plates increases,causing the mine disaster easily.

关 键 词：逆断层 支承应力 两盘滑移量 断层活化 

分 类 号：TD323[矿业工程—矿井建设]