Hydraulic support (hydraulicsupport) is a structure used to control the pressure of the mine in the coal mining face. It is mainly used for long-wall comprehensive mining face with horizontal face and gently inclined thick coal seam of less than or equal to 10 degrees to mine the whole height of coal along the bottom plate at one time, and it is also applicable to the horizontal stratified roof coal comprehensive mining face with sharp inclined extra-thick coal seam. It is a kind of hydraulic power device that uses liquid pressure to generate support force and realize automatic shifting to carry out roof support and management, and is an indispensable supporting equipment for comprehensive mechanized coal mining.
The mining surface pressure acts on the hydraulic support in the form of external load. In the mechanical system of interaction between the hydraulic support and the mining surface surrounding rock, if the combined force of the support parts of the hydraulic support and the combined force of the external load acting on the hydraulic support from the roof plate is exactly the same straight line, the hydraulic support is very adaptable to the mining surface surrounding rock.
English 
Русский 
