Caving Thickness Effects on Stability of Coal-rock Pillar against Water on Steep Coal Seam Mining under Water

摘要：

To study the failure law of coal-rock pillar against water while caving thickness vary in steep coal mining condition, we used numerical calculation and analog simulation methods to study caving thickness effects on roof collapsing characteristic and the stability of coal-rock pillar, based on the geohydrologic condition of LONGHU mine. The result showed that: with caving thickness increase, the ratio of inbreak height to saving thickness decrease, while the ratio of fractured height to caving thickness raise, caving fore- behind angle basically stay the same; with caving thickness increase, stress concentration on main roof more obvious, rock mass downward fall features more obvious, coal-rock pillar against water easier fall. Research conclusion provide the basis for coal-rock pillar remaining, ensure mining safety in production under water.

关键词： Mining under water Steep coal seam Coal-rock pillar against water Caving thickness The ratio of water flowing fracture height to caving thickness Fracture

作者: LIU Changyou LIU Yuejun YANG Zhen HUANG Bingxiang

作者单位: School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China State Key Laboratory of Coal Resources and Mine Safety, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China

会议类型: 国际会议

会议名称: 2010 International Conference on Mine Hazards Prevention and Control(第二届矿山灾害预防与控制国际学术会议 ICMHPC)

会议地点: 青岛

会议语种:英文

页码: 356-363

在线出版日期: 2010-10-15（万方平台首次上网日期，不代表论文的发表时间）