Study on synthetic supporting technology of high stressed soft rock roadway in synclinal structure
The 3rd central transformer station and pump station of Xuecun mine Fengfeng Group is 650m in deep,where the surrounding rock is siltstone mostly,bedding is developmental,and the argillaceous rock is cementation.The uniaxial compressive strength is 17MPa,so surrounding wall is soft rock.And the stations are by synclinal axis and locate in region of high stress.After the roadway is excavated into the region,the problem of supporting becomes more and more serious.The traditional of bolt and U-formed arched falsework have been deformed and destroyed badly.Aiming at engineering problem above,this paper discusses the supporting principle of soft rock roadway and high stress roadway.And based on theoretical investigation,equivalent material simulating and numerical simulation,we confirm gross section synthetic supporting technology that consists of shoterete and rock bolt,anchor cable increasing stress,grouting reinforcement and inverted arch,and design idiographic supporting parameters and construction measure at one time.At the same time,the rock pressure surveying is used for surveying of roadway constringency and deep base point.Founding on the supporting process and surveying result,the supporting design is reasonable,the supporting effect is best,the most excavation deformation is within the rational limits.The experiment is successful,and it has a good reference for similar supporting.
Synclinal axis Soft rock Bolt Cable anchor Grouting reinforcement Inverted arch
Liu Xinhe Zhang Xiangling Lv Xiujiang Liu Bo
Hebei University of Engineering,Handan 056038,China China University of Mining and Technology,Beijing 100083,China
国际会议
The 2007 International Conference on Mine Hazards Prevention and Control(2007矿山灾害预防与控制国际学术会议)
青岛
英文
336-341
2007-10-17（万方平台首次上网日期，不代表论文的发表时间）