Roadway layout for recycling residual coal pillar in room-and-pillar mining of thick coal seam

作     者：Jin Gan Wang Lianguo Zhang Jihua Hu Minjun Duan Ning 

作者机构：State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining & Technology Xuzhou 221008 China School of Mechanics & Civil Engineering China University of Mining & Technology Xuzhou 221666 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：2015年第25卷第5期

页      面：729-734页

核心收录：

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

基　　金：the National 973 Programs of China (No.2014CB046905) the National Natural Science Foundation of China(Nos.51274191 and 51404245) the Doctoral Fund of Ministry of Education(No.20130095110018) 

主　　题：Room-and-pillar mine Residual coal pillar Repeated mining Roadway layout Asymmetric support 

摘      要：In the context of a room-and-pillar mining gob in Shanxi province in China,this paper numerically investigates the stress distribution and deformation rules of roadway surrounding rocks at various locations of residual coal pillars in room-and-pillar mining gobs using software FLAC3 *** is found that the concentrated stress beneath coal pillars distributes in a shape of ellipse.A reasonable roadway layout is then *** this design,it is indicated that roadways should be designed to avoid the supporting zones of pillars with increasing compression and take into account the roof falling and crushing in the upper *** to the surrounding rock deformation characteristics and mining roadway locations as well as the supporting principles of timely support,rock reinforcing,piecewise management and suiting local conditions,a new asymmetric shield supporting plan is *** field surveying results show that this supporting plan can effectively control the roadway rock deformation,thus guarantee the safe and smooth construction of roadways.