The hydraulic prop is widely used as the support in the underground tunnel of coal mine, so what are the advantages of the hydraulic prop? Let's talk about it.
1. High initial support
Generally, the initial bracing force can reach 7-10t, which is 3-10 times of that of the friction type metal strut (the initial bracing force of the friction type metal strut is 2-3T when the adjustable props is used, and only 1t when the adjustable props is not used)
2. Constant resistance performance
In the case of small roof subsidence, the acrow prop can reach the rated working resistance and maintain the characteristics of constant resistance (the maximum working resistance can be achieved when the roof subsidence of friction type metal acrow prop is large and the pillar is reduced to more than 100mm to 400mm). Obviously, the single hydraulic prop can quickly achieve high working resistance and greatly improve the roof maintenance.
3. Uniform bearing capacity of column
The characteristics of large initial supporting force and constant resistance make each acrow prop bear load more evenly, which is an important feature superior to friction type metal acrow prop, and is very beneficial to maintain the integrity of the roof of the working face below the medium stability.
4. Fast speed of support and withdrawal
The lifting and lowering of hydraulic prop are completed by hydraulic prop system. The operation of withdrawing and erecting can be completed only by pulling the handle, using the injection gun to inject liquid from the outside, pulling the unloading valve to discharge liquid, etc. the speed of the internal injection strut is generally about twice that of the friction strut.
5. Promote safe production and reduce consumption of auxiliary materials
Because of the high initial supporting force and the tight contact with the roof, the fast withdrawal and support, the good effect of controlling the roof, the advancing speed of the working face is increased, the roof falling accident is obviously reduced, the safety production is promoted, and the wood consumption is correspondingly reduced.
