中南大学学报（自然科学版）2017，Vol.48Issue(8)：2162-2168,7.DOI:10.11817/j.issn.1672-7207.2017.08.025
软弱破碎围岩运输巷道变形机理及修复支护
Deformation mechanism and repair support of haulage roadway with weak-fractured surrounding rock
摘要
Abstract
To solve the support problem of soft-fractured surrounding rock underground,taking the haulage roadway of Baluba copper mine at 580 m level as study object.The stability of roadway was monitored,and the deformation characteristics of roadway and influencing factors were analyzed.The main influencing factors are stress concentration,weak and fractured surrounding rock,low supporting intensity and water.After analyzing the deformation mechanism of roadway,the mechanical model of roadway was established,based on the mechanical model and actual situation,the combined support design with "steel arch and long prestressed cable bolt" was put forward,and then the FLAC3D was used to analyze the stability of roadway before and after support.The results show that region of stress concentration is away from the roadway surface and the area of plastic zone of surrounding rock declined by 40％.The stability of roadway was monitored after repairing and the results indicated that the roadway deformation has been effectively controlled,with maximum subsidence 50 mm of the roof,maximum convergence deformation 39 mm of two side walls and no heaving floor in 60 d.关键词
巴鲁巴铜矿/运输巷道/软弱破碎围岩/变形机理/修复支护/数值模拟Key words
baluba copper mine/haulage roadway/weak-fractured surrounding rock/deformation mechanism/repair support/numerical simulation分类
矿业与冶金引用本文复制引用
吴爱祥,胡凯建,黄明清,王贻明,王晶军..软弱破碎围岩运输巷道变形机理及修复支护[J].中南大学学报（自然科学版）,2017,48(8):2162-2168,7.基金项目
国家“十二五”科技支撑计划项目(2012BAB08B02) （2012BAB08B02）
国家自然科学基金资助项目(51304011,51374035)(Project(2012BAB08B02) supported by the National Key Technologies R&D Program during the 12th Five-year Plan （51304011,51374035）
Projects(51304011,51374035) supported by the National Natural Science Foundation of China) （51304011,51374035）
