1. Before the installation of the steel arch support , check the contour, center line and elevation of the excavation section.

Steel mine supports refers to the artificial structure installed in the mine roadway to support the rock. Its function is to control the movement of surrounding rock and prevent it from falling, so as

The underground roof support is used to support the roadway in the coal mine. Underground roof support is mainly composed of 1 roof beam, 2 supporting legs, 4 clamping cables and 2 bottom plates. Unde

Steel arch support production equipment has I - steel cold - bending machine. Automatic i-steel cold bending machine can bend various types of profiles such as: channel steel, i-steel, h-shaped steel,

1, The steel arch support should be installed according to the design position, the steel support must be longitudinal connection with reinforcement, and to ensure the welding quality. In the process

After installation of tunnel roof support, due to poor soil since the stability of surrounding rock and a certain distance between each excavation tunnel roof support in a short period of time did not