Joint Application of Hollow Inclusion Stress Meter and Loose Circle Tester in Coal Mine Surveying

The safety of coal mining is very important. The geo-stress data and the range of loose circle of surrounding rock are valuable geological exploration data of coal mining. In this paper, the hollow inclusion stress meter is used to measure the in-situ stress of the intake roadway in the west wing of Xieqiao Mining Area, and the loose circle test of the roadway is carried out with the BA- II type loose moving coil tester. The results show that the site is in the high geo-stress field and is dominated by the horizontal crustal stress and the loose zone of the roadway is 200 cm to 210 cm, which belongs to the category IV-V surrounding rock. According to the characteristics of stress field in this area, three-core arch section and support form of anchor, mesh, cable and grouting are proposed.