Borehole hydromining is a kind of safe and efficient new mining method .
钻孔水力采煤是
既安全、又能极大地提高资源利用率
新采矿方法。
Borehole hydromining is a kind of safe and efficient new mining method .
钻孔水力采煤是既安全、又能极大地提高资源利用率新采矿方法。
The acoustoelectric effect of rock is investigated with experimental method in model borehole.
在模型井中对岩石声电效应进行了实验研究。
It's a mean of geotechnical investigation, including borehole surveying, costeaning, trenching exploration, test pitting, hole exploration, geophysical exploration and penetration sounding.
岩土工程勘察手段，包
钻
、井、
、坑、洞以及物、触等。
It is found that the rational located destressing boreholes can induce structural failure of the surrounding rock-mass,consequently the high stress move deeply in the rock-mass,and the stres...
在卸压孔和锚网联合支护后改善了围岩附近应力环境,改变了围岩破坏时空次序,对控制围岩变形和破坏具有突出优越性.
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