基于颗粒流理论的上覆岩层裂隙演化规律研究  

Fissure Evolution Laws of Overlying Strata Based on Particle Flow Theory

作　　者：武猛猛[1] 王刚[1,2] 

机构地区：[1]山东科技大学矿业与安全工程学院,山东青岛266590 [2]山东科技大学矿山灾害预防控制省部共建国家重点实验室培育基地,山东青岛266590

出　　处：《煤矿安全》2016年第8期33-36,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51304128;51304237);山东科技大学杰出青年科技人才支持计划资助项目(2015JQJH105)

摘　　要：以孔庄煤矿典型工作面为例,采用离散元数值软件PFC(Particle Flow Code)对工作面回采过程中上下煤岩体冒落过程进行了模拟,分析了上覆煤岩体裂隙产生、发展的形成过程,得到了上覆煤岩裂隙演化规律及声发射事件数。研究结果表明,工作面回采后,上覆煤岩体内产生垮落带、断裂带和弯曲下沉层带,裂隙发育最大高度为67.42 m。上覆煤岩体裂隙在采空区上方约呈45°角发展,并随工作面的前进由下向上、由后往前依次演变。A typical mining face of Kongzhuang Mining Area was taken as an example; the discrete element numerical software PFC（Particle Flow Code） was used to simulate the upper and lower coal and rock caving process during the mining process.We analyze the forming process of generation and development of overlying coal and rock fracture,and get the overlying coal and rock fracture evolution laws and acoustic emission incidents.The results showed that,after mining,the caving zone,fractured zone and separation zone appeared in overlying coal,of which the maximum height was 67.42 meters.Overlying coal above the mined-out area developed about a 45 ° angle,which developed from down to up and moved forward continuously with the advancing mining.

关 键 词：上覆岩层 采动裂隙场 声发射参数 PFC 数值模拟 

分 类 号：TD325[矿业工程—矿井建设]