采矿与安全工程学报2017，Vol.34Issue(1)：24-31,8.DOI:10.13545/j.cnki.jmse.2017.01.004
构造破碎区沿空掘巷偏应力分布特征与控制技术
Distribution characteristics of deviatoric stress and control technology of gob-side entry driving in structure fracture zone
摘要
Abstract
Taking the tailgate of panel 15111 in Huangyanhui colliery as the engineering background,the distribution characteristics of deviatoric stress and control technology of gob-side entry driving in structure fracture zone were investigated through numerical simulation,laboratory tests and field moni-toring.The results showed that the peak deviatoric stress and its position change significantly with the increase of pillar width;the change ranges of the peak deviatoric stress descend from pillar rib (20 MPa) to roof (4.6 MPa),floor (2.6 MPa),and to coal rib (2.5 MPa),and the change range of position of the peak deviatoric stress from floor (4.25 m) to roof and pillar rib (3 m),and further to coal rib (0.25 m).Under the influence of the deviatoric stress of gob-side entry driving above 15 MPa caused by excavation,a large range of shear failure occurred in surrounding rock and the surrounding rock in structure fracture zone was subject to crumbling and breakage,which exacerbated the roadway instability,and the roadway was prone to roof caving,rib collapse and heavy floor heave when the support parameters were not reasonable.Accordingly,a synthetical control technology was put forward,including roof control with highdensity long anchored cables,rib control with large-diameter short cables,comer control with intensive anchors,and bolting and grouting method used in the broken coal-mass area.Field application has shown that this technology can effectively control the deformation of surrounding rock and guaran-tee the stability of gob-side entry roadway in structure fracture zone.关键词
构造破碎区/沿空掘巷/偏应力/控制技术Key words
structure fracture zone/gob-side entry driving/deviatoric stress/control technology分类
矿业与冶金引用本文复制引用
马振乾,姜耀东,宋红华,李彦伟..构造破碎区沿空掘巷偏应力分布特征与控制技术[J].采矿与安全工程学报,2017,34(1):24-31,8.基金项目
国家重点基础研究发展计划(973)项目(2010CB226801) （973）
