Supporting of soft rock tunnel excavation has been one of the key technical problems which affects the further development of coal industry production and construction of our country .
The stress principle of U-shaped Steel Arch Support
1. The hydraulic support worker must be familiar with the performance, structure, principle and hydraulic control system of the hydraulic support, familiar with the basic operation and hydraulic knowl
U-shaped Mine Roof Supports are widely used in mine roadway support and mountain tunnel support, which can effectively reduce the occurrence of accidents such as roof fall and gangway, and are safe an
