The progress of the technology of geophysical survey to preventing gas accident occurring in the colliery in China
我国防止矿井瓦斯事故的地球物理探测技术进展

The gas accident is the first major calamity that the colliery exploiting in China, it usually took place very suddenly and tremendouspowerly, and cause extensive injuries and deaths. Gas even store in coal seam, and outstanding on rock wall piece which is destroyed by mining,somining, so it is a typical geological science question to prevent the gas accident of the colliery from occurring. By means of measuring the difference in physical characteristic of rock body we could predict the geological condition that the gas power composes in, By means of measuring the position in three-dimensional space we could determines the security thickness of the rock body with which the mining is protected, and so on . The technology of geophysical survey play a key role in preventing gas accident from occurring in the colliery in the past ten years.