上解放层开采解放作用机理数值模拟研究  

Numerical Simulation of Protective Mechanism of Upper Protective SeamMininig

作　　者：吕长国[1,2] 窦林名[1,2] 徐长厚[1] 张明伟[1,2] 郑有雷[3] 

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221008 [2]中国矿业大学矿业工程学院,江苏徐州221008 [3]兖州煤业股份有限公司济宁三号煤矿,山东邹城272069

出　　处：《煤矿开采》2011年第2期12-15,82,共5页Coal Mining Technology

基　　金：国家重点基础研究发展规划(973)资助项目(2010CB226805);煤炭资源与安全开采国家重点实验室自主研究课题资助项目(SKLCRSM10X05);国家自然科学基金资助项目(50490273;50474068)

摘　　要：为实现大埋深冲击矿压煤层的安全高效回采,依据济三煤矿十二采区工作面地质条件及开采参数,对上解放层工作面开采过程中围岩的应力、变形规律进行数值分析及地应力的现场实测分析。研究结果表明:开采解放层会改变被解放层原岩应力分布状态;开采解放层破坏顶底板岩层结构,提前释放高位岩体弹性能,改善被解放层开采中能量积聚与释放的空间分布状况;随解放层工作面的推进,下方被解放层应力会经历采前应力升高、采后应力降低和应力逐渐稳定3个阶段;数值分析结果和现场测定卸压效果基本吻合。研究成果为工作面开采布置提供借鉴,具有一定的理论意义与实用价值。In order to safely mine deep coal-seam with rock-burst liability,rule of stress and deformation of surrounding rock in mining upper protective coal-seam was simulated by numerical method and geo-stress was test on the basis of geological and mining condition of 12th mining area in Jining 3rd mine.Results were showed as follows.Mining protective coal-seam would change stress distribution state of protected coal-seam.Protective coal-seam mining would destroy its roof and floor rock structure and release elastic energy of higher strata in advance,which improve energy accumulation and release condition of protected coal-seam.With protective mining face advancing,stress in protected coal-seam would come through 3 phrases including stress increase before mining,stress decrease after mining and stress stability.Numerical simulation result was fit for on-the-spot observation data,so the results would provide reference for mining design.

关 键 词：冲击矿压 解放层 数值模拟 解放作用机理 

分 类 号：TD823.84[矿业工程—煤矿开采]