深井强冲击矿压煤层巷道控制技术数值模拟研究

发布时间：2018-07-23 11:20

【摘要】：为探索具有强冲击危险性的深井煤层巷道控制技术,以某矿7121工作面为工程背景,基于FLAC~(2D)数值模拟软件对4种巷道控制方案的围岩应力、位移及塑性区等特征进行分析。数值计算结果表明:方案3巷道应力峰值最小,其最大应力值为30.68 MPa,应力峰值降低约5 MPa;方案4巷道变形量最小,两帮收敛量为21.36 mm,顶底板移近量为16.70 mm;大直径钻孔使围岩提前产生塑性区,释放积聚在煤岩体中的弹性能。"三结构"控制技术的卸压效果好、围岩变形量小、能量释放多,破坏了发生冲击矿压的强度和能量条件。工程实践表明,现场巷道围岩变形控制效果明显,验证了数值模拟结果的合理性。研究成果可为深井煤岩强动力灾害防治提供借鉴和指导。
[Abstract]:In order to explore the roadway control technology of deep coal seam with strong impact risk, the characteristics of surrounding rock stress, displacement and plastic zone of four roadway control schemes are analyzed based on FLAC2D numerical simulation software, taking 7121 face of a certain mine as engineering background. The numerical results show that the maximum stress value of roadway is 30.68 MPA, the maximum stress value is about 5 MPA, and the deformation of project 4 roadway is the smallest, and the maximum stress peak value of project 3 is 30.68 MPA, and the maximum stress peak value is about 5 MPA. The convergence of the two sides is 21.36 mm and the roof and bottom plate is close to 16.70 mm. Large diameter boreholes make the surrounding rock produce plastic zone ahead of time and release the elastic energy accumulated in coal and rock mass. " The "three structure" control technique has good pressure relief effect, small deformation of surrounding rock and more energy release, which destroys the strength and energy condition of rock burst. The engineering practice shows that the control effect of surrounding rock deformation is obvious, which verifies the rationality of the numerical simulation results. The research results can be used for reference and guidance for the prevention and control of strong dynamic disasters of coal and rock in deep wells.
【作者单位】：六盘水师范学院矿业工程系;
【基金】：贵州省高校优秀科技创新人才支持计划项目(黔教合KY字[2015]510号) 贵州省煤炭绿色开采及矿区生态环境保护科技创新人才团队项目(黔科通[2013]93号) 贵州省教育厅采矿工程特色重点学科项目(黔学位办[2015]26号)
【分类号】：TD324.2

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