煤矿安全2017，Vol.48Issue(6)：180-183,4.DOI:10.13347/j.cnki.mkaq.2017.06.048
承压水上膏体充填率与充填体强度对底板破坏深度的影响
Influence of Paste Filling Rate and Strength Above Confined Groundwater on Floor Failure Depth
摘要
Abstract
In order to solve the safe mining of confined groundwater,we propose paste backfill method in this paper for the inhibition of floor failure depth and reducing water inrush risk;for the geological condition that Daizhaung Coal Mine lower group coal 1160 mining zone bears the threaten of confined groundwater,using FLAC3D three dimensional model,based on different banckfill body filling rate and filling body strength,stress distribution,plastic zone distribution and displacement distribution laws are simulated under different space width of advancing operation;simulation results show that when filling rate reaches to 95％ and filling body strength eventually increases to 4 MPa,stress concentration factor of surrounding rock at coal face is about 2,deformation amount of roof and floor is 200 mm,and floor failure depth is about 4 m.关键词
承压水/膏体充填/充填率/充填体强度/数值模拟Key words
artesian water/paste filling/filling rate/filling body strength/numerical simulation分类
矿业与冶金引用本文复制引用
孙希奎,常庆粮..承压水上膏体充填率与充填体强度对底板破坏深度的影响[J].煤矿安全,2017,48(6):180-183,4.基金项目
山东省泰山学者建设工程专项经费资助项目(201309) （201309）
