摘要
地下煤层开采,采场顶板垮落、覆岩沉降和破坏乃至地表沉陷变形是一个整体全过程,是一个统一系统,在此思想的指导下,对地表沉陷规律与上行开采过程中覆岩沉降规律进行了分析和比较,得知垮落带与断裂带高度是否进入到上层煤是煤层能否进行上行开采的关键,同时对影响上行开采的几大因素进行了分析。通过比值法、"三带"判别法、围岩平衡法、数理统计法对七五煤矿下组煤上行开采的可行性进行了研究论证,得知上行开采是可行的;为上行开采的上覆岩层运动规律理论分析与可行性研究论证提供了重要经验和借鉴。
Underground coal seam mining, stope roof caving, overburden subsidence, destruction and even surface settlement is a entire process, a unified system. Under the instruction of this thought, the surface subsidence law and ascending mining law were analyzed and compared. It was known that the caving zone height and the overbreak zone height whether entered the upward zone was the key whether coal seam could carry on ascending mining; simultaneously several important factors affecting ascending mining was analyzed. The feasibility problem of ascending mining of Qiwu coal mine lower seams was studied through the ratio method, ＂three belts＂ distinc- tion method, the surrounding rock equity method, the mathematical method of average, and it was known that the ascending mining was feasible. The important experience would be provided to the overburden behavior law theoretical analysis and the feasibility research of ascending mining.
出处
《煤》
2007年第7期7-9,18,共4页
Coal
关键词
上行开采
上覆岩层
运动规律
三带
比值法
ascending mining
overburden
behavior Law
three belts
ratio method
