工矿自动化2017，Vol.43Issue(6)：37-41,5.DOI:10.13272/j.issn.1671-251x.2017.06.009
远距离下保护层开采上覆煤岩层采动应力场数值模拟研究
Numerical simulation research on mining stress field of overlying coal-rock seam under far distance lower protective seam mining
摘要
Abstract
In order to research the problem that mining underlying No.8 coal seam can alleviate strong strata behavior during mining No.3 coal seam or not,a far distance lower protective seam mining scheme was simulated by use of FLAC3D software,and stress peak value,stress distribution and plastic range were analyzed during mining process of the protected No.3 coal seam before and after mining the lower protective No.8 coal seam.The research results show that with the lower protective No.8 coal seam advancing,inclined stress of working face of the protected No.3 coal seam represents "M" shape,namely both ends of coal body shows stress concentration,and stress in middle region is lower,so as to make surrounding rock of the No.3 coal seam working face roadway,which is arranged in central pressure relief area,get pressure relief with different degree.After mining the lower protective No.8 coal seam,the stress peak value of the protected No.3 coal seam working face is reduced about 18％,and mining influence distance is shorted about 10 m.Meanwhile,stress concentration degree is weakened,and new plastic zone does not appear in coal body of the working face.关键词
煤炭开采/围岩稳定性/强矿压显现/下保护层开采/采动应力场/卸压Key words
coal mining/surrounding rock stability/strong strata behavior/lower protective seam mining/mining stress field/pressure relief分类
矿业与冶金引用本文复制引用
杨贺,邱黎明,汪皓,张子阳,赵聪..远距离下保护层开采上覆煤岩层采动应力场数值模拟研究[J].工矿自动化,2017,43(6):37-41,5.基金项目
国家自然科学基金资助项目(51574231,51504244) （51574231,51504244）
教育部科学技术研究项目(113031A) （113031A）
中国矿业大学第七批优秀创新团队建设项目(2014ZY001) （2014ZY001）
煤炭资源与安全开采国家重点实验室大学生科技创新计划项目(SKLMD20150004). （SKLMD20150004）
