CHINA MINE ENGINEERING

In this paper, ShapeMetrix 3D system is used to make statistics on the joint data of the measurement points in the middle section of vein 12 of Jinxing Gold mine. Combined with the indoor rock mechanics experiment, the quality of underground rock mass is classified based on Q system and RMR classification. It is concluded that most of the surrounding rocks in the middle section of vein 12 of Jinxing Gold mine belong to class Ⅱ~ Ⅲ rock mass. Through theoretical calculation, it is concluded that the roof and two walls of underground roadway can be supported by pipe joint bolt and metal mesh, and the mesh of bolt is 2m×2m. Bolt length 2.2m, bolt spacing 1.5m.