孤岛工作面防水煤柱留设宽度模拟分析及工程应用  

Simulation analysis and engineering application of retaining width ofwaterproof coal pillars in isolated working face

作　　者：于振子 李昂[3] 韩泰然 张波 Yu Zhenzi;Li Ang;Han Tairan;Zhang Bo(China Pingmei Shenma Holdings Group Co.,Ltd.,Pingdingshan 467099,China;State Key Laboratory of Coking Coal Resources Green Exploitation,Pingdingshan 467099,China;Xi′an University of Science and Technology,Xi′an 710054,China)

机构地区：[1]中国平煤神马控股集团有限公司,河南平顶山467099 [2]炼焦煤资源绿色开发全国重点实验室,河南平顶山467099 [3]西安科技大学,陕西西安710054

出　　处：《能源与环保》2023年第7期266-272,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家重点研发计划资助项目(2018YFC0604706)。

摘　　要：平顶山老旧矿区开采服务年限长、遗留煤柱多、回采难度大,要延长矿井使用寿命,实现节支增效,回收遗留煤柱已迫在眉睫,但孤岛工作面开采面临着防水煤柱合理留设难题,若防护不利,易引发矿井水害,增大开采成本。因此,针对现场面临的工程实际问题,以消除或减少采空水患为目标,采用数值模拟研究手段,对原设计方案进行优化选择及对比分析,动态再现了多采面开采及巷道采掘下的围岩应力场、位移场和塑性破坏规律,并进行了工程实践应用。结果表明,留设25 m煤柱宽度,采面回采前后均存在一定厚度的弹性核区,围岩变形量小,有利于巷道维护,无明显的应力集中现象,可满足工程实际需要,采面已实现安全回采,未发生采空区突涌水事故,最大限度地回收了煤炭资源,研究成果给全国相似矿区遗留煤柱安全回收提供借鉴依据。The old mining area in Pingdingshan has the following problems:long mining service life,many remaining coal pillars,and great difficulty in mining.It is urgent to achieve cost saving and efficiency improvement,and recover the remaining coal pillars,but the mining of isolated island faces the problem of reasonable retention of waterproof coal pillars,if the protection is not good,it is easy to cause mine water damage and increase the mining cost.Therefore,in view of the practical engineering problems faced by the field,aiming at eliminating or reducing the goaf water disaster,this paper adopts numerical simulation research methods to optimize the original design scheme and carry out comparative analysis,dynamically reappear the surrounding rock stress field,displacement field and plastic failure law under multi face mining and roadway mining,and carry out engineering practice application.The results show that there is a certain thickness of elastic core area before and after mining with 25 m coal pillar width.The deformation of surrounding rock is small,which is conducive to roadway maintenance,without obvious stress concentration.It can meet the actual needs of the project.The mining face has achieved safe mining,without water inrush accident in the goaf,and the coal resources have been recovered to the maximum extent.The research results are left over to similar mining areas in China.The safe recovery of coal pillar can be used for reference.

关 键 词：平顶山矿区 孤岛工作面 遗留煤柱 煤柱留设 数值模拟 

分 类 号：TD823[矿业工程—煤矿开采]