断层滑动准则和稳定性评价及构造应力场的反演  

ASSESSMENT ON FAULTS SLIDE CRITERION AND STABILITY AND BACK-ANALYSIS OF TECTONIC STRESS FIELD

作　　者：宋卫华[1] 张宏伟[1] 

机构地区：[1]辽宁工程技术大学资源与环境工程学院,辽宁阜新123000

出　　处：《岩石力学与工程学报》2008年第A02期3740-3745,共6页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点研究发展规划(973)项目(2005cb221501);高等学校博士学科点专项科研基金资助课题(20040147005);辽宁省教育厅高等学校科研项目计划(2008280)

摘　　要：为研究矿震、突出等动力现象与断层滑动、开采深度的关系,首先在试验室进行砂岩双剪摩擦试验,从工程角度出发,确定砂岩的滑动准则。其次为研究地下岩体的稳定性,确定构造应力场的分布,针对地下岩体的赋存特点,在分析实测应力分布特点的基础上,通过地质动力区划方法建立地质构造模型,采用有限元法反演复杂断层扰动下的构造应力场,计算结果与矿区震源面制分析结果以及原岩应力测量结果取得较好的一致性。计算的高应力区域中心位置位于Ⅰ级断裂的不连续地带,与地下地震多发地带相对应,说明构造应力是矿区地震的主要成因。研究表明,断裂面的失稳滑动是北票矿区地震的主要机制,构造应力的存在是矿震发生的必要条件,而矿区开采则是发震的诱导因素,北票断裂对区域其他次级断裂及其构造应力区起主导和控制作用,是北票矿区动力现象的动力源。For the study of the relationship between the dynamic phenomena in mines such as mine earthquakes, outburst and faults slide, extraction depth, firstly, double shear friction experiments of sandstone have been carried out so as to achieve its slide criterion in engineering aspects. Secondly, in order to study the stability of underground rock and zone of tectonic stress field, based on the analysis of distribution characteristics of initial rock stress measurements, the geology structural model is built according to the feature of underground rock, and tectonic stress field is obtained by back-analysis using finite element method. The calculating results agree well with the analysis result of earthquakes mechanism and the distribution characteristics of the measurements. The high stress regional centers locating at discontinuous zone of I level faults are corresponding to underground earthquakes scene. The study shows that existence of tectonic stress is the major origin and necessary condition of mine earthquakes. The instability sliding of the faults is the main manifest and the mining activity is the leading factor. Beipiao fault has dominated effects on other sub faults and tectonic stress areas and is dynamical fountain of dynamic phenomena in the Beipiao Mines.

关 键 词：岩石力学 矿井动力现象 断层滑动准则 地质动力区划 构造应力场 

分 类 号：TU45[建筑科学—岩土工程]