采动影响下断层面应力与滑移特征研究  

Study on stress and slip characteristics of fault plane under mining influence

作　　者：于秋鸽 张华兴[1,2] 白志辉[3] 张刚艳[1,2] 邓伟男[1,2] 邹友平[1,2] YU Qiuge;ZHANG Huaxing;BAI Zhihui;ZHANG Gangyan;DENG Weinan;ZOU Youping(Coal Mining Branch,China Coal Research Institute,Beijing 100013,China;Coal Mining and Designing Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China;Jizhong Energy Fengfeng Group Co.,Ltd.,Handan 056000,China)

机构地区：[1]煤炭科学研究总院开采研究分院,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]冀中能源峰峰集团有限公司,河北邯郸056000

出　　处：《煤炭科学技术》2019年第4期63-68,共6页Coal Science and Technology

基　　金：国家自然科学基金面上资助项目(51874177)

摘　　要：为了研究工作面开采结束后断层面的应力与滑移特征,以峰峰矿区某矿实际地质条件为背景,通过理论计算和数值模拟的方法,建立了断层面应力和滑移力学模型,得到了采动影响下的断层滑移力学判据及断层滑移的主要影响因素,研究了工作面推进结束后的断层面应力特征和断层滑移情况并进行了实例验证。研究结果表明:开采造成断层面正应力和剪应力的变化是断层滑移的主要影响因素;断层面岩性参数相近时,断层面正应力和剪应力与至断层露头的垂直距离近似呈线性关系,并且正应力变化幅度远大于剪应力变化幅度,正应力增加速率为剪应力增加速率的19倍左右;煤层开采后,距离断层露头较近的断层面岩体有向下滑移趋势,距离断层露头较远的断层面岩体有向上滑移趋势。In order to study the stress and slip characteristics of the fault plane after the mining of the working face, this paper takes the actual geological conditions of a mine in the Fengfeng mining area as the research background and builds a fault geological stress and slip mechanics model on the basis of theoretical calculation and numerical simulation. The fault slip mechanics criterion and the main influencing factors of fault slip under the influence of mining are obtained and the stress characteristics of the fault plane and the fault slip after the end of the working face are studied and verified empirically. The study results show that the change of normal stress and shear stress caused by mining is the main influencing factor of fault slip. When the lithology parameters of the fault plane are similar, the normal stress and shear stress of the fault plane change linearly with the depth, and the variation of the normal stress with the depth is much larger than the shear stress with the depth. The rate of increase of the normal stress is 19 times as large as the rate of increase of the shear stress. After the coal seam is mined, the fault plane rock mass close to the fault outcrop has a downward sliding trend while the fault plane rock mass which is farther from the fault outcrop shows an upward sliding tendency.

关 键 词：采动影响 断层面应力 断层滑移 正应力 剪应力 

分 类 号：TD327[矿业工程—矿井建设]