采矿与安全工程学报2012，Vol.29Issue(2)：157-161,5.
近距离房柱采空区下长壁采场顶板垮落特征研究
Study of Caving and Fracturing over A Longwall Panel Beneath A Goaf Mined by Room and Pillar
摘要
Abstract
In order to research the process of roof caving and fracturing over a longwall panel which is beneath a goaf mined by room and pillar method, physical analog simulation has been built up in condition of geological situation of Tangshangou coal mine.In this physical model, the subsidence velocities of roof and strata fracturing have been obtained. After the subsidence velocities have been differentiated, we got the acceleration of subsidence in such kind of geological and mining condition. The data shows that the overburden released energy with a short step periodically. By the way, the larger energy released after a several short step. During this process the strata began to fracture, and especially, the pillar collapsed quickly in a goaf mined by room and pillar method. The caving process started from pillar and roof to the surface quickly. The fracturing speed of strata is quicker than one in a virgin overburden.关键词
相似模拟/房柱采空区/顶板垮落/顶板位移变化率/采动裂隙Key words
physical analog simulation/ goaf mined with room and pillar method/ roof caving/ subsidence velocity/ mining-induced fractures分类
矿业与冶金引用本文复制引用
杨真,童兵,黄成成,王刚..近距离房柱采空区下长壁采场顶板垮落特征研究[J].采矿与安全工程学报,2012,29(2):157-161,5.基金项目
国家自然科学基金项目(51004102,51174193) （51004102,51174193）
中国矿业大学青年基金项目(2009A002) （2009A002）
