When the surrounding rock of the steel arch support is weak and broken and its self-stability is poor, the steel arch frame has such good mechanical properties that the initial support is required to

Tunnel roof support is a kind of power plant which uses steel support pressure to generate support force and realize automatic shifting device for roof support and management. It is an indispensable s

Steel mine support is a structure used to control the mine pressure in coal face. The form of pressure outside the mining surface ACTS on the mining support. In the mechanical system of the interactio

When the steel arch is moving in the tunnel, the personnel in the forward direction should avoid it in time, and when the mechanical movement is adopted in the moving process, the personnel should pay

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