采场正断层损伤活化机理与特征  

Activation mechanism and characteristics caused by normal fault damage under mining disturbance

作　　者：陈太勇 刘国磊[1] 常笑笑 吴延成 马秋峰 郝喜庆 赵成博 CHEN Taiyong;LIU Guolei;CHANG Xiaoxiao;WU Yancheng;MA Qiufeng;HAO Xiqing;ZHAO Chengbo(School of Resources and Environmental Engineering,Shandong University of Technology,Zibo 255022,China;Suncun Coal Mine,Xinwen Mining Group Co.,Ltd.,Tai’an 271200,China;Guotun Coal Mine,Shandong Energy Group Luxi Mining Co.,Ltd.,Heze 274704,China;Zaozhuang Mining Group Gaozhuang Coal Industry Co.,Ltd.,Jining 272200,China)

机构地区：[1]山东理工大学资源与环境工程学院,山东淄博255022 [2]新汶矿业集团有限责任公司孙村煤矿,山东泰安271200 [3]山东能源集团鲁西矿业有限公司郭屯煤矿,山东菏泽274704 [4]枣庄矿业集团高庄煤业有限公司,山东济宁272200

出　　处：《煤矿安全》2025年第2期126-136,共11页Safety in Coal Mines

基　　金：国家自然科学基金面上资助项目(52474104);国家自然科学基金资助项目(51904178)。

摘　　要：为了探究工作面向正断层推采时断层力学响应特征,基于高庄煤矿1105工作面工程地质条件建立数值仿真模型,获得开采扰动下断层损伤变量演化特征;对模拟结果进行多元线性回归分析并建立下盘岩体力学模型,获得断层损伤变量与煤体应力的关系。结果表明:断层的裂隙损伤由高位岩层向低位岩层发展,当断层损伤变量达到临界值时,断层具备发生活化的条件;工作面采动影响下,断层损伤变量的发展早于煤体支承压力的增长,可将断层损伤变量作为预报断层活化、煤体应力升高的关键指标;通过多元线性回归分析确定的对断层损伤变量的影响因素依次为距断层距离、垂直应力、断层内摩擦角、断层黏聚力;工作面向断层推采过程中,工作面与断层间煤体宽度减小造成了煤体应力增加;同时推采导致了断层面的损伤发展,上下盘岩体之间有效承载面积减小,岩体质量大部分由下方煤体承担,煤体应力进一步增加。In order to explore the mechanical response characteristics of faults when the working face is normal fault mining,a numerical simulation model is established based on the engineering geological conditions of 1105 working face in Gaozhuang Coal Mine to obtain the evolution characteristics of fault damage variables under mining disturbance.The simulation results are analyzed by multiple linear regression analysis and the mechanical model of footwall rock mass is established to obtain the relationship between fault damage variables and coal stress.The results show that the fracture damage of the fault develops from the high rock layer to the low rock layer.When the fault damage variable reaches the critical value,the fault has the condition to activate;under the influence of working face mining,the development of fault damage variable is earlier than the increase of abutment pressure of coal body.Fault damage variable can be used as a key index to predict fault activation and coal body stress increase;through multiple linear regression analysis,the determined influencing factors of fault damage variables are distance from fault,vertical stress,internal friction angle of fault and fault cohesion;in the process of working face to fault mining,the decrease of coal width between working face and fault causes the increase of coal stress.At the same time,the mining leads to the damage development of the fault surface,the effective bearing area between the upper and lower rock mass is reduced,the weight of the rock mass is mostly borne by the lower coal body,and the coal body stress is further increased.

关 键 词：正断层 开采扰动 断层活化 损伤变量 数值模拟 多元线性回归分析 

分 类 号：TD324.1[矿业工程—矿井建设]