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中文摘要：
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。
英文摘要：
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.
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