half-coal and half-rock roadway 半煤岩巷
coal and coal-rock roadway 煤及半煤岩巷道
coal-rock roadway 半煤岩巷道
half coal and rock roadway 半煤岩巷
soft rock coal roadway 软岩回采巷道
Many dynamic disturbances often lead to local instability of roadway surrounding rock and mining workplace and result in rock burst in coal mining.
煤矿生产中存在着大量的动力扰动，常导致采矿巷道和采场围岩局部失稳，诱发冲击矿压发生。
The numerical analogy has been adopted to study the mechanic features influencing stress distribution in coal and rock around the roadway in order to control rock burst disasters.
为了治理冲击矿压灾害，采用数值模拟方法研究了井巷周围煤岩体的力学特性对应力分布的影响。
Most rock roof of roadway is sediment rock, so its intensity is low, the stratification is a common rock mass structure in coal mines.
煤巷顶板多数是岩体强度较低的沉积岩，层状岩体结构是沉积岩的主要特征之一。
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