Roadway failure and support in a coal seam underlying a previously mined coal seam

作     者：Lu Yinlong Wang Lianguo Zhang Bei 

作者机构：State Key Laboratory of Geomechanics and Deep Underground Engineering Xuzhou 221008 China School of Mines China University of Mining & Technology Xuzhou 221008 China 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2012年第22卷第5期

页      面：619-624页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 081903[工学-安全技术及工程] 08[工学] 

基　　金：supported by the National Natural Science Foundation of China (No.50874103) the National Basic Research Program of China (No.2010CB226805) the Natural Science Foundation of Jiangsu Province (No.BK2008135) by the Open Foundation of State Key Laboratory of Geomechanics and Deep Underground Engineering (No.SKLGDUEK0905) 

主　　题：Adjacent coal seams Floor destruction of the upper coal Lower coal roadway Deformation and failure Support measure 

摘      要：The influence of an upper,mined coal seam on the stability of rock surrounding a roadway in a lower coal seam is *** technical problems of roadway control are discussed based on the geological conditions existing in the Liyazhuang Mine No.2 coal *** stress distribution and floor failure in the lower works after mining the upper coal is studied through numerical *** failure mechanism of the roof and walls of a roadway located in the lower coal seam is *** predicted deformation and failure of the roadway for different distances between the two coal seams are used to design two ways of supporting the lower *** is a combined support consisting of anchors with a joist steel tent and a combined anchor truss.A field test of the design was performed to good *** results have significance for the design of supports for roadways located in similar conditions.