Bearing strength test device and strength determination method for rock around a certain (mine) tunnel

摘要

It relates to a support strength test device and a strength determination method for rocks around a certain (mine) tunnel. Includes a load-bearing frame unit (mounting frame unit) consisting of a base (bottom seat), vertical columns, and a beam. The presented columns are placed vertically on both sides of the top surface of the base and the beam is fixed horizontally on top of the columns. The axial pressure loading device is fixed in a central position on the top surface of the base and is used to apply bottom-up axial pressure to the specimen. An impact load device fixed to the beam is used to apply a top-down axial impact load to the specimen. A confinement pressure loader is provided between the presented axial pressure loader and the impact loader, which is used to apply confinement pressure to the specimen in a horizontal plane. It also includes a load control unit, a monitoring unit, and a data analysis unit. The present invention can be well anastomosed with the actual stress state of the rock around the tunnel in the field, and the obtained supporting strength can maintain the safety and stability of the surrounding rock. Furthermore, high-precision and simple test operations can be performed more reliably. [Selection diagram] Fig. 1