摘要
为了探究郑州矿区厚的软顶、软底和软煤在炮采条件下底板变形破坏的机制,以告成煤矿某典型"三软"工作面为研究对象,通过现场实测、理论解析和数值模拟等方法对采动底板变形破坏深度和机制进行了综合研究。基于对上、下巷道底板现场应变感应数据的分析,得出了该面"三软"煤层回采巷道底板变形破坏的深度、层位及其受采动煤壁前方应力峰值的宽度和影响范围。在此基础上,建立了煤层底板应力分析计算的工程地质模型,运用理论解析和数值计算分别推导和模拟了在矿山压力作用下随着工作面推进,采动煤层底板不同深度基本应变解析解和应力与变形的分布规律。
To research the delbrmation and failure mechanism ot ＂three-soft＂ coal seams under blast- ing mining conditions in Zhengzhou mining area, by comprehensively using field measurement, theoretical analysis and numerical simulation, the deformation and failure depth and mechanism of mining floors in a typical coal face in Gaocheng Coal Mine were studied in this paper. The deformation and failure depth and stratum in the roadway floor of the ＂three-soft＂ coal seam, as well as the width and influence scope of peak stress ahead of the coal face were obtained by analyzing the monitoring data of strain sensors in boreholes at the haulage and ventilation roadways. On this basis, the engineer- ing geological model for floor stress calculation was established, and the analytical solution of basic strain and the distribution law of deformation and stress in mining floor at different depths along with the face advancing were deduced and simulated by theoretical analysis and numerical simulation.
出处
《采矿与安全工程学报》
EI
北大核心
2013年第4期518-525,共8页
Journal of Mining & Safety Engineering
基金
江苏高校优势学科建设工程项目
国家自然科学基金青年科学基金项目(41102201)
国家重点基础研究发展计划(973)项目(2013CB036003)
关键词
“三软”煤层
采动底板
综合分析
变形破坏
缓冲作用
＂three-soft＇coal seam
mining floor
comprehensive analysis
deformation and failure
buffer action
