褶曲构造型矿区地应力场分布特征与冲击机制  

Distribution Characteristics and Impact Mechanism of In-situ Stress Field in Fold Tectonic Mining Area

作　　者：赵耀中 张宁博 邓志刚[2,3,4] 赵善坤 柴海涛[2,3,4] 李少刚 ZHAO Yaozhong;ZHANG Ningbo;DENG Zhigang;ZHAO Shankun;CHAI Haitao;LI Shaogang(Wushenqi Energy Bureau, Erdos 017300, China;Mine Safety Technology Branch of China Coal Research Institute, Beijing100013, China;State Key Laboratory of Coal Mining and Clean Utilization (China Cool Research Institute), Beijing 100013,China;Beijing Mine Safety Engineering Technology Research Center, Beijing 100013, China)

机构地区：[1]乌审旗能源局,内蒙古鄂尔多斯017300 [2]煤炭科学技术研究院有限公司安全分院,北京100013 [3]煤炭资源高效开采与洁净利用国家重点实验室(煤炭科学研究总院),北京100013 [4]北京市煤矿安全工程技术研究中心,北京100013

出　　处：《煤矿安全》2019年第5期23-26,30,共5页Safety in Coal Mines

基　　金：国家重点研发计划资助项目(2017YFC0804202;2017YFC0804203);国家自然科学基金资助项目(51674143;51404140;51574150);中煤科工集团科技创新基金重点资助项目(2014ZD008)

摘　　要：褶曲构造附近往往是冲击地压的多发区域,该区域较高的原岩应力对冲击地压的发生有着重要的影响。基于典型褶曲构造型矿区构造分布特征和地应力测试结果,分析矿区地应力场类型及与构造分布的关系,通过地应力场反演方法分析矿区地应力场的分布规律,结合矿区冲击破坏特征和力学分析方法,提出了褶曲构造型矿区冲击地压的发生机制。研究结果表明:褶曲构造型矿区地应力场以水平应力为主,最大主应力方向与褶曲轴线垂直;轴部附近往往是应力的集中区域,且随着褶曲变异程度的增大,区域应力集中程度越明显、影响范围越广;矿区冲击破坏以底板破坏为主;开采扰动导致巷道围岩集中静载荷显著增大和坚硬顶板断裂产生动载荷的耦合作用诱发了褶曲构造型矿区的冲击地压。The vicinity of fold structure is often the area where rock burst occurs frequently. The higher original rock stress in this area has an important in fluence on the occurrence of rock burst. Based on structures distribution and ground stress test results of typical fold -type mining area, the stress field type of mining area and relationship with the structures distribution are analyzed. Geo-stress field distribution of mining area is analyzed by geo-stress field inversion method and the mechanism of the rock burst in the fold -type mining area is proposed combined with the features of rock burst damage and mechanical analysis method. The results show that: the horizontal stress is the main stress in the fold-type mining area, and the maximum principal stress is perpendicular to the curve axis;the stress concentration area is usually near the axis, and with the increase of the degree of fold variation, the more obvious the regional stress concentration is, the wider the influence area is. The main impact damage of mining area is floor damage;the coupling of significantly increasing static load of surrounding rock of roadway and dynamic load caused by hard roof fracture induces the rock burst of fold-type mining area.

关 键 词：褶曲构造型矿区 地应力测量 地应力场反演 冲击地压 动静载 

分 类 号：TD324.1[矿业工程—矿井建设]