Sharp inclined coal seam roadway supporting method

Abstract

The invention provides a sharp inclined coal seam roadway supporting method. The method comprises the following steps that (1) a roadway is excavated, specifically, the roadway is excavated accordingto the section of an inclined roadway, and dangerous rocks of a tunnel face are cleared; and (2) hole opening supporting is carried out, specifically, lug holes for anchor cables are opened in the topsurface of the section of the roadway by using a drilling rig, the lug holes are with the diameter phi of 28 mm, anchor rods and the anchor cables are fixed on a top plate of the roadway, steel strips and metal meshes are arranged on the anchor rods, the metal meshes cover the top plate of the roadway, the metal meshes, the anchor rods and the anchor cables are welded and fixed, and gaps betweenthe metal meshes and the top plate of the roadway are filled with plate skin. The sharp inclined coal seam roadway supporting method adopts the anchor cables and the anchor rods to support the inclined roadway, and the arrangement of the anchor rods and the anchor cables can be adjusted according to the specific type of the inclined roadway, so that the adaptability is high, meanwhile, a supporting structure is stable, the construction process is simple, the structural firmness is high, and the long-term safety and stability of the roadway supporting structure are ensured.

Description

technical field [0001] The invention relates to the field of roadway support, in particular to a method for supporting a steeply inclined coal seam roadway. Background technique [0002] During the coal mining process, it is necessary to dig roadways on both sides of the coal mining face for transportation and ventilation. In order to ensure the stability of the surrounding rock of the roadway, support is generally required after the roadway is excavated. However, there are differences in the internal structure of the coal seam, which brings inconvenience to the support work. The steeply inclined coal seam is a common type of coal seam structure. [0003] Steeply inclined coal seams generally refer to coal seams with an inclination angle greater than 45°. The geological structure of steeply inclined coal seams is complex, with many faults and folds, and the thickness of coal seams varies greatly. The occurrence conditions of mined coal seams are generally poor, with few rese...

AI Technical Summary

Problems solved by technology

[0008] However, the use of conventional bolt support results in severe deformation of the surrounding rock of the roadway, strong bulging, difficult maintenance, and frequent repairs. The cost of roadway support is high, and it is difficult to meet the requirements of asymmetric deformation of the surrounding rock of the mining roadway with a large dip angle. , can not meet the requirements of safe control of roadway surrounding rock stability

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