坚硬顶板断裂震源模型及应力波远场震动效应  

A hard roof fracture source model and its far-field seismic impact by stress wave

作　　者：王恩元[1,2] 冯俊军 孔祥国[2] 刘晓斐[2] 沈荣喜[2] WANG Enyuan;FENG Junjun;KONG Xiangguo;LIU Xiaofei;SHEN Rongxi(state Key Laboratory of Coal Resources and Safe Mining,China University of Mining ＆ Technology,Xuzhou,Jiangsu 221116,China;Key Laboratory of Gas and Fire Control for Coal Mines,School of Safety Engineering,China University of Mining ＆ Technology,Xuzhou,Jiangsu 221116,China;School of Architeeture Engineering,AnhuiUniversityofTeehnology,Ma＇anshan,Anhui 243000,China)

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116 [2]中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,安全工程学院,江苏徐州221116 [3]安徽工业大学建筑工程学院,安徽马鞍山243000

出　　处：《采矿与安全工程学报》2018年第4期787-794,共8页Journal of Mining & Safety Engineering

基　　金：“十三五”国家重点研发计划项目(2016YFC0801401); 国家自然科学基金项目(51574231); 江苏高校优势学科建设项目

摘　　要：煤矿开采过程中坚硬顶板断裂产生的冲击震动效应具有极大危害,为研究坚硬顶板断裂引发的远场震动效应,重点考虑煤矿特征尺度下坚硬顶板断裂裂纹扩展速度,分析了顶板断裂过程动力学演化特征,基于地震学位错震源理论,推导了坚硬顶板断裂滑移时空分布函数,建立了适用于分析煤矿特征尺度下坚硬顶板断裂过程的震源模型。以义马矿区千秋煤矿21141工作面巨厚砾岩层为例,基于该震源模型采用MATLAB和ANSYS/LS-DYNA软件模拟分析了坚硬顶板断裂产生的震动位移场幅值和震动能量。结果表明:新的震源模型可用于定量描述采场坚硬顶板断裂产生的远场震动效应。研究成果能够用于对顶板断裂冲击震动效应进行灾前评估,同时为深入揭示顶板扰动型冲击地压动力学机理提供了理论依据。The seismic impact induced by the hard roof fracture poses a serious threat to the mining safety. In order to investigate the far-field seismic impact induced by the hard roof fracture, especially considering the crack of hard roof fracturing in coal mine. The dynamic characteristics of crack propagation is analyzed and the slip function is derived based on the dislocation source theory, a source model for describing the hard roof fracture in coal mine scale is finally proposed. The thick conglomerate rock strata in the panel 21141 of the Qianqiu coal mine is taken as an example, the seismic wave amplitude and seismic energy induced by the hard roof fracture is numerically calculated using the MATLAB and ANSYS/LS-DYNA software based on the source model. The results show that the new source model is applicable for quantitatively description of the far-field seismic impact induced by the hard roof fracture. The results obtained in this study provide an effective pre-assessment method for the hard roof fracture hazards and a theoretical basis for revealing the dynamic mechanism of rockburst induced by hard roof impacts.

关 键 词：坚硬顶板 震源模型 裂纹扩展 震动能量 冲击地压 

分 类 号：TD324[矿业工程—矿井建设]