不连沟煤矿巨厚煤层综放开采覆岩运移规律研究

 为了研究在内蒙古地区比浅埋煤层埋藏更深煤层在开采过程中的覆岩运移特征，以内蒙古不连沟煤矿F6201综放面为工程背景，运用理论分析和现场观测相结合的手段，对其矿压显现与覆岩运移规律进行了研究。研究表明：F6201工作面亚关键层(基本顶)属台阶岩梁结构，呈现滑落失稳形式；主关键层垮落滞后于基本顶破断，同样以滑落失稳形式出现。由于主关键层与亚关键层破断的不同步性，导致工作面来压步距出现大小间隔现象。

Study on Migration Law of Overburden Strata Above Fully Mechanized Top Coal Caving Mining Face in Ultra Thick Seam of Buliangou Mine

In order to study the overburden strata migration features during the mining process in the seam deeper than the shallow seam in Inner Mongolia Area,base on No.F6201 fully mechanized top coal caving mining face in Buliangou Mine as the engineering background,the theoretical analysis and the site observation combined means were applied to study the mine pressure behaviors and the overburden strata migration law.The study showed that the sub-key stratum(base roof) of No.F6201 coal mining face was a bench rock beam structure and in a sliding and stability lost mode.The main key stratum would be fell down after the base rood broken and would be in a sliding and stability lost mode.Due to the main key stratum and sub-key stratum would be broken in different step,there would be different space phenomenon occurred in the pressure step distance of the coal mining face.