正断层两盘不同开采顺序的支承应力演化规律  

Bearing Stress Evolution Law of Normal Fault Under Two Different Mining Sequence

作　　者：孔朋[1] 蒋金泉[1] 王普[1] 徐传伟[1] 

机构地区：[1]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,山东泰安271019

出　　处：《煤矿安全》2017年第10期65-68,共4页Safety in Coal Mines

基　　金：国家自然科学基金资助项目(51574155);泰安市科技发展计划资助项目(2015ZC1058)

摘　　要：以工作面沿正断层走向布置时断层两侧工作面开采为背景,采用FLAC^(3D)数值模拟,研究了下盘工作面接替上盘工作面开采及上盘工作面接替下盘工作面开采时,断层两盘煤柱应力及接替面超前支承应力的演化规律。研究表明:正断层一侧工作面采动时,下盘工作面开采的煤柱应力集中程度小于上盘,下盘工作面采动对上盘煤岩体应力的影响较大;断层两侧工作面采动时,上盘工作面接替下盘工作面开采,上盘断层煤柱应力集中程度较高,下盘工作面接替上盘工作面开采时,下盘断层煤柱应力集中程度较低;2种开采顺序下接替面超前支承应力集中明显,其中上盘工作面接替下盘工作面开采时,上盘工作面超前应力集中程度更大。Taking the working face mining along both sides of the normal fault when working face is positioned along the positive fault, the FLAC^（3D）numerical simulation is used to study the stress of two plates coal pillar in fault and the evolution laws of advance support stress of replace working face when footwall working face replaces upper working face firstly or the upper working face replaces the footwall working face. Research results show that： mining is on one side of the working face near normal fault,the stress concentration degree of coal pillar of the footwall face mining is less than that on the upper plate, footwall face mining has bigger influence on the stress of coal and rock in upper plate; mining is on both sides of the working face near fault, when upper plate replaces the footwall face mining, the stress concentration degree of coal pillar of upper plate is higher; when footwall replaces the upper plate face mining, the stress concentration degree of coal pillar of footwall working face is lower; advanced support stress concentration of replace face is obvious under two kinds of mining order; the advanced stress concentration degree of upper plate working face is greater when upper plate working face replaces the footwall working face.

关 键 词：正断层 支承应力 开采顺序 冲击地压 应力集中 矿压显现 

分 类 号：TD323[矿业工程—矿井建设]