The application of simple hydraulic prop in the face of small coal mine is expounded.
阐述了单体液压支柱在小型煤矿工作面支护中的应用。
After the impoundment of Xiaolangdi Reservoir, the water of small coal mines threatened Xin an coal mine.
小浪底水库蓄水后，淹没区内小煤窑充水对新安煤矿形成较大危害。
Because massive small coal mine closure, causes the difficulty of mine water-proof to enlarge and threatens badly mine security.
大量小煤矿关闭后形成的积水，使得水害治理难度加大，严重威胁着矿井安全。
应用推荐