ultra-close相关论文
通过对岱庄煤矿4300采区工作面的顸板结构分析,得出了上部极近距离煤层开采后,下部煤层顶板形成极易漏冒的“块体-散体-梁”结构。采......
A roadway within ultra-close multiple-seams(RUCMSs) is one of the most difficult supported coal roadways to deal with in......
经对芦子沟煤矿采空区极近距离下部煤层首采工作面的矿压显现特征观测,综合掌握相应地质条件下工作面来压特征及其液压支架的受力......
以官地矿近距离与极近距离的8#与9#煤层为研究背景,为了对其进行安全、经济的高回采率开采,采取理论计算与力学模型建立相结合的方......
针对极近距离的空间立体交叉巷道交错段的围岩控制,根据自稳隐形拱理论对上方巷道掘进对其下伏巷道造成的影响进行了理论分析,分析......
Simulation of recovery of upper remnant coal pillar while mining the ultra-close lower panel using l
With the depletion of easily minable coal seams,less favorable reserves under adverse conditions have to be mined out to......