-
-
-
-
Honor
-
-
-
-
-
Contact
-
Goaf treatment
Release time:
2023-01-02
Author:
Source:
Goaf treatment
Goaf treatment
According to the conditions of coal seam occurrence and the nature of roof rock, the treatment methods of goaf include all caving methods, allFilling method, local filling method, coal pillar support method, slow sinking method, etc.
(I) all collapse method
Make the direct roof of the goaf of the coal mining face collapse artificially and in a planned way to maintain the work.The space is the smallest suspended roof area, reducing the pressure of the top plate on the working face support, and maintaining the integrity of the direct top.
(1) Topping distance: the distance between two adjacent topping.
(2) Maximum top control distance: the maximum width of the working face along the strike before topping.
(3) Minimum top control distance: the minimum width of the working face along the strike after the top is placed. Minimum roof control distance size basisThe nature of roof rock and the space required for coal mining face are determined, generally including machine road, sidewalk and material road.
(4) Column return method: mechanical column return, manual column return.
(5) Roof: row column roof, no row column roof, pier column roof.
(II) full filling method
All filling method Filling material All filling the rock formation control method of the goaf. All filling method according to the directionThe characteristics of goaf conveying materials are divided into self-weight filling, mechanical filling, wind filling, hydraulic filling and so on. FullThe partial filling method is suitable for "three down and one up" coal mining.
(III) local filling method
The rock formation control method of local filling goaf with filling material. Application of local filling methodHard thin coal seam in the roof rock layer.
(IV) slow sinking method
The slow sinking method is to gradually close the top and bottom plates behind the goaf of the coal mining face.method. The slow sinking method is suitable for thin coal seams with a thickness of less than 1m.
(V) coal pillar support method
Coal pillar support method In the goaf of the coal mining face, the appropriate width of the coal pillar is left to support the rock formation of the roof.Control methods. The coal pillar support method is suitable for coal seams with hard roof rock strata.
Key words:
Next Page
Previous Page:
Next page:
