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依据顶板下沉速度确定合理的采支距离霍州辛置煤矿赵戌林，李铁柱，韩新华，岐红升回采工作面支护的直接对象是直接顶岩层，通过直接顶间接地对老顶的活动起一定的控制作用。顶板下沉速度是指顶底板在某一点单位时间内的相对移近量，它是衡量高档采煤工作面矿山压力显现程...
According to the roof sinking speed to determine a reasonable mining branch distance Huo Xin Xin coal mine Zhao Xu Lin, Li Tiezhu, Han Xinhua, Qi Hongsheng mining face support direct target is a direct top rock through the direct top indirectly on the activity of the roof A certain degree of control. Roof sinking speed refers to the top floor at a certain point relative to the unit within a short period of time, it is a measure of high-grade mining face mine pressure show Cheng ...