摘要
针对长壁采空区上方岩层损伤影响范围及其遗弃煤层开采问题,用简化的平面力学模型,解析分析了煤层采出后长壁采空区上方岩层的损伤影响范围,并根据垂直方向上岩层的损伤影响程度按从大到小的顺序将采空区覆岩分为破损垮落带、损伤扰动带和无损变形带,获得了长壁采空区上方遗弃煤层上行开采的安全层间距计算公式.针对山西焦煤集团有限责任公司西山煤电集团公司白家庄煤矿8号煤层长壁采空区上方遗弃的6号煤层上行开采计算了其安全层间距.
In allusion to the damage zone of overlying strata and mining the left-over coal above the longwall goal, through simplified plane model of mechanics, the damage zone of strata above the longwall goaf after coal mined was analytical analyzed. Overburden rock mass on the mined-out area were obviously divided into breakage caving zone, excavation-disturbed zone and nondestructive deformation zone according to the vertical change of their dam- age extent from high to low. The formula for determining the salty layer distance of the upward mining of the left-over coal above the longwall goaf was obtained. The salty layer distance of the upward mining on the left-over coal above the longwall goal was calculated in Baijiazhuang Coal Mine of Xishan Coal Electricity Group Company.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2009年第8期1032-1036,共5页
Journal of China Coal Society
基金
国家自然科学基金资助项目(50704024)
山西省青年科技研究基金资助项目(2007021024)
太原市技术创新计划资助项目(0803003)
太原理工大学矿业启明星计划资助项目
关键词
长壁采空区
上覆岩层
损伤范围
上行开采
安全层间距
the longwall goaf
overlying strata
damage zone
upward mining
safety layer distance
