采矿与安全工程学报2016，Vol.33Issue(2)：191-198,8.DOI:10.13545/j.cnki.jmse.2016.02.001
潘一东矿近距离煤层上行开采围岩裂隙演化规律模拟研究
Fracture evolution characteristics of surrounding rock during ascending mining of closer coal seam in Panyidong coal mine
摘要
Abstract
Based on the special engineering and geology condition of deep coal seam mining in Pa-nyidong coal mine, the characteristics of rock break, crack evolution and subsidence deformation during the ascending mining of deep coal seams were analyzed by physical and numerical simulations in this paper. In addition, the interrelationship between the deformation curve and the layer break, crack de-velopment, stress state was further analyzed. The results show that during the mining operation of lower and upper coal seams, the rich cracks areas are mainly located in the right side of coal wall and the left side of open-off cut and above thegob. Rock layers above the gob go through anevolutioncourse with the generating, expanding and closing of cracks. During the lower seam mining, the fractured angle in wall is smaller than that in open-off cut. During the upper seam mining, with the relative location dif-ference of coal faces in the two coal seam, the fractured angle in wallincreases firstly,and decreases af-terwards. Moreover, it has close relationship between the curve slope of roof subsidence in different area, the rock crack development condition, and the stress state.关键词
近距离煤层/上行开采/裂隙演化/覆岩运移/模拟分析Key words
closer coal seam/ascending mining/fracture evolution/overlying strata development/simulation analysis分类
矿业与冶金引用本文复制引用
张向阳,任启寒,涂敏,窦怡川..潘一东矿近距离煤层上行开采围岩裂隙演化规律模拟研究[J].采矿与安全工程学报,2016,33(2):191-198,8.基金项目
国家自然科学基金项目(51504007，51574007，51474005，51474006)；安徽省高等学校省级自然科学研究项目(KJ2013A098) （51504007，51574007，51474005，51474006）
