Room-and-pillar相关论文
Protecting miners from coal bursts during development above historic mine workings in Harlan County,
In order to reach a large,untapped reserve of high-quality coal,D8 Cloverlick Mine proposed to mine a corridor nearly 60......
韩桥湾煤矿二盘区下部2-2煤层厚度大,开采条件优越,先行采用房柱式开采完毕,使其上部1-2煤层不能按正常顺序开采。根据两煤层赋存......
The objective of this paper is to study the behavior of a low thick and low depth coal seam and the overburden rock mass......
