摘要
基于FLAC2D数值模拟软件分析巷道底煤厚度对矿震诱发底鼓冲击的动态响应规律。结果表明:随着底煤厚度的增加,动力扰动下巷道底板水平应力峰值先升高后降低并逐渐向底板深处转移,底板垂直位移峰值、塑性区深度及最大能量密度均呈非线性增加,且增加趋势越来越弱,并趋于稳定;动力扰动下特厚煤层巷道极易发生底鼓冲击动力灾害,动力效应明显;现场矿震演化规律分析验证数值模拟结论的合理性。研究成果可为特厚煤层巷道底冲击矿压防治提供借鉴。
Analyzing of dynamic response law of roadway floor rock-burst induced dynamic disturbance at different bottom coal thickness by using FLAC^2D. The results showed that the maximum horizontal stress increases at first and then decreases and gradually transfers toward floor depths under dynamic disturbance, the floor vertical displacement peak and plastic depth and maximum energy density all increase nonlinearly with the increase of bottom coal thickness, meanwhile the increase trend gets more and more weakly. It is easy to occur floor rock-burst for roadway induced dynamic disturbance in extremely thick coal seam, and the dynamic effect is significant. The rationality of numerical simulation analysis is verified by the analysis of mine earthquake law. The conclusions will provide reference for floor rock-burst prevention of extremely thick coal seam.
作者
刘建刚
郁钟铭
刘赛
井广成
刘洪洋
李志刚
LIU Jian-gang YU Zhong-ming LIU Sai JING Guang-cheng LIU Hong-yang LI Zhi-gang(Department of Mining Engineering, Liupanshui Normal University, Liupanshui 553004, China School of Mining Engineering, China University of Mining＆ Technology, Xuzhou 221116, China)
出处
《中国矿业》
北大核心
2016年第11期127-131,共5页
China Mining Magazine
基金
贵州省科技厅技术基金项目资助(编号:黔科合LH字[2015]7619号)
国家自然科学基金青年科学基金项目资助(51204165)
采矿工程省级特色重点学科项目资助(编号:黔学位合字ZDXK[2015]9号)
关键词
底煤厚度
矿震
动态响应
底鼓冲击
特厚煤层
bottom coal thickness
mine tremor
dynamic response
floor rock-burst
extremely thick coal seam
