短壁
案例分析—用短壁开采的方式来回收煤柱毕业论文外文翻译(编辑修改稿)
Models for extraction width of 5 pillars (104m) at a depth cover of 50m (30m hard cover+20m alluvial soil). Table 3 Calibrated properties Modulus of elasticity (Gpa) Poisson’s ratio RMR Rock mass