厚松散层薄基岩条带法开采采留尺度研究  

Study on strip mining size under thick alluvium and thin bedrock

作　　者：郭惟嘉[1] 陈绍杰[1] 李法柱[1] 

机构地区：[1]山东科技大学矿山灾害预防控制教育部重点实验室,山东青岛266510

出　　处：《煤炭学报》2006年第6期747-751,共5页Journal of China Coal Society

摘　　要：基于建筑物下条带法开采的地表变形观测,结合数值模拟方法,研究了厚松散层薄基岩条件下,条带法开采不同采留尺度的地表沉陷规律.研究表明,按一般条带法设计进行的地表沉陷预测下沉系数较实际偏小;且相同条带采出宽度时基岩厚度小,地表下沉值增大;相同基岩厚度时条带采出宽度小,地表下沉值也小;基岩厚度较小时,地表下沉值随条带采宽增大时增加较大;进行条带开采采留尺度设计时,除了按一般情况下的设计原则考虑外,还应考虑基岩的厚度,使得开采后支托层在基岩内形成,以保证条带开采控制地表沉陷的意义.On the basis of the observation data of strip mining under structure and combining with numerical simulation, the surface subsidence rule of different mining and reservation width in strip mining under thick alluvium and thin bedrock were analyzed. The study shows that the calculated subsidence coefficient according to common strip mining is smaller than the actual value; the subsidence increases along with bedrock thinning with same mining width, and it is small when mining width is small with same bedrock; the subsidence increases more obviously with mining width increasing with thinner bedrock. In order to ensure the significance to control subsidence, while designing the mining and reservation width, not only design principle but also bedrock thickness should be considered, which can make the supporting terrane exist in bedrock.

关 键 词：厚松散层 薄基岩 条带法开采 采留尺度 地表沉陷 

分 类 号：TD823.83[矿业工程—煤矿开采]