The mine roof support can not only bear the load of the upper wall rock, but also bear the load of the wall rock between the steel arch. In order to better play the role of steel arch, mine roof suppo

1. The surface of the steel arch support processing site shall be paved with concrete. According to the design drawings, the machining site can accurately measure and release the large sample of the a

Tunnel roof support is to point to in the tunnel projects such as highway tunnel engineering, railway tunnel engineering, military take cover engineering, mining, coal, iron ore and so on the roadway,

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