钻孔速度对孔底处气体动力状态的影响黄祖祥译在大多数情况下，矿山工作的进行与钻各种尺寸的孔及其效能联系在一起。在顿巴斯，随着矿井作业的深度增加，在煤层钻孔时意外突喷的危险也不断地增大。利用德国的经验，为整个工作面盖上一个专用的金属支持墙，并为通过钻孔工... Impact of Drilling Speed ​​on the Gas Dynamic State at the Bottom of the Hole In most cases, minework is linked to the drilling of holes of various sizes and their effectiveness. In Donbass, as the depth of mine operations increases, the risk of accidental blowouts during borehole drilling is also continually increasing. Utilize the German experience to cover the entire work surface with a dedicated metal support wall and through the drilling ...