Borehole hydromining is a kind of safe and efficient new mining method .

钻孔水力采煤是一种既安全、大地提高资源利用率的新的采矿方法。

The acoustoelectric effect of rock is investigated with experimental method in model borehole.

在模型井中对岩石的声电效应进行了实验研。

It's a mean of geotechnical investigation, including borehole surveying, costeaning, trenching exploration, test pitting, hole exploration, geophysical exploration and penetration sounding.

岩土工程勘察的一种手段，包括钻探、井探、槽探、坑探、洞探以及物探、触探等。

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...

在卸压孔和合支护后改善了围岩附近的应力环境,改变了围岩破坏的时空次序,对控制围岩变形和破坏具有突出的优越性.