基于现场实测“三软”煤层采动底板变形破坏机制  

Deformation and failure mechanism of mining floor in “three-soft”coal seam based on field measurement

作　　者：朱术云[1] 周海洋[2] 李新芳[3] 杨朝维 孙强[1] 

机构地区：[1]中国矿业大学资源与地球科学学院,江苏徐州221116 [2]郑煤集团公司裴沟煤矿,河南新密452382 [3]郑煤集团公司超化煤矿,河南新密452385

出　　处：《采矿与安全工程学报》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)

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.

关 键 词：“三软”煤层 采动底板 综合分析 变形破坏 缓冲作用 

分 类 号：TD12[矿业工程—矿山地质测量]