-
-
-
-
Honor
-
-
-
-
-
Contact
-
Mine pressure and its manifestation
Release time:
2022-12-14
Author:
Source:
Mine pressure and its manifestation
Mine pressure and its manifestation
From the surface to the deep underground where the coal seam is buried, the rock layers are stacked, and the lower coal layers bear the upperThe quality of the overburden. The original rock stress formed by gravity before the underground coal rock formation is not mined.in a state of equilibrium. When the roadway is excavated or mining work is carried out in the coal and rock body, a certain space is formed,The rock layer on it loses its original support, which destroys the original stress equilibrium state and causesStress redistribution. This is due to the redistribution of stress in the roadway, chamber and coal mining face around the coal,The force caused by the rock mass and the support is called mine pressure, referred to as mine pressure or ground pressure.
Due to the role of mine pressure, in the roadway, coal mining face will cause a series of mechanical phenomena, such as topPlate sinking, floor bulging, roadway deformation, even large-scale roof caving, coal wall slabs, support deformation orDamage and surface collapse, etc., collectively referred to as mine pressure show, referred to as mine pressure show.
Key words:
Previous Page
