急斜煤层开采老顶破断力学模型分析-wjc.pdf

急斜煤层开采老顶破断力学模型分析 1 1 1,2 贾正奎 ，王俊超 （1.四川广旺集团船景煤业有限责任公司，四川宜宾，645253；2.西安科技大学 能源学院 教育部西 部矿井开采及灾害防治重点实验室，陕西西安 710054；） 摘 要：根据现场实测和实验室相似材料模拟, 说明急斜水平分段放顶煤开采悬露顶板的破断为板结 构破断。为研究急斜煤层水平分段放顶煤开采过程中顶板变形的影响因素,论文根据弹性力学理论建 立了狭长薄板弹性变形力学模型, 着重研究这种狭长板在复杂荷载作用下, 围岩破坏移动规律以及煤 层倾角、水平分段高度对顶板挠曲变形量影响程度, 为了解大幅度提高顶煤高度后矿压显现规律以及 有效地进行岩层控制和治理地表塌陷提供科学依据。 关键词：急斜煤层；水平分段放顶煤；悬露顶板；板结构破断 Analysis of destruction mechanical model of main roof in steep coal seams mining 1 1, 2 Jia Zheng— Kui ,Wang Jun—chao (1.Sichuan Guang-wang Chuan-jing coal Limited Liability Company, sichuan yibin 645253 ；2.Xi'an University of Science and Technology Key Western China Laboratory of Mining and Disaster Control for Ministry of Education, Xi’an 710054 ) Abstract ：The destruction of suspension dew roof is explained board destruction in horizontal section top coal caving in steep coal seams mining by the field measurement and similar material simulation in laboratory. In order to study some influencing factors of main roof’s deformation in horizontal section top coal caving in steep seams mining, then long and narrow thin elastic deformation mechanics model is built by the Elastic mechanics theory. It is focused on research of this kind of long and narrow board under complex loads with surrounding rock damage movement rule and Coal Seam pitch、height of horizontal subsection on influence degree of bending deformation of roof. It provides the scientific basis to understand greatly improved after the height of top rock pressure regularity and control effectively strata behavior and manage surface subsidence. Key words ：steep coal seams；horizontal section top coal caving ；suspensio