Novel tunnel anchor cable/rod support method

Abstract

The invention relates to the technical field of a coal mine downhole extracting working face roadway support. In the existing roadway support anchor, the phenomenon of insufficient locking force is general; the rock surface of the roadway is uneven; and the bearing contact surface of a pallet surface is point-typed stress. The invention is characterized in that an original matrix-shaped hole-distributing drilling method in which the drilling direction is perpendicular to or homodromous with the cross-section of a roadway 3 is changed into a quincunx-shaped hole-distributing drilling method in which the drilling direction is tilted to the cross-section slope wall of the roadway, moreover, the drilling inclination angle of a rock mass top plate 1 is staggered row by row, namely, the drilling inclination angle the row is opposition to the direction of neighboring two rows; and the drilling directions of two slope walls 2 of the roadway cross-section are tilted upwards. The top end of an anchor cable (rod) 5 is used for pushing a resin explosive roll 4 to the drilling bottom of the rock mass top plate 1 and the slope walls 2 and then being fixed into a whole by stirring, later sleeved in a rubber wedge plate 6, a steel strip fictitious graticule 7 and a hemispheric concave hole pallet 8, and next locked by a hemispheric convex nut 9, so as to cause the anchoring contact surface among the anchor cable (rod) 5 and the rock mass top plate 1 and the slop walls 2 to be larger and firmer with stronger reliability and stability. Finally, reflective paint 10 is coated and brushed at the external end part of the anchor cable (rod).

Description

Technical field [0001] The invention specifically relates to a new roadway support method, which belongs to the technical field of coal mine safety and production, and is suitable for roadway support in underground coal mining faces. Background technique [0002] As far as the inventor knows, the roadway support of the mining face in coal safety production is a very important work link. The quality and quality of the roadway support directly affect the safety and production of the coal mine. At present, the tunnel support of the underground mining face of the coal mine adopts matrix positioning drilling perpendicular to the cross section of the roof rock mass and the side wall of the coal seam. After drilling a certain depth, insert the resin cartridge, insert the anchor cable (rod), and prestress The traditional support and anchorage of tensioning and anchoring the top, installation of steel belt warp and weft, flat pallet and ordinary nut locking. When drilling in a vertical or...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a solution to the problems that occur in the roof of the roadway and the support of the side wall of the coal seam in the process of coal safety production, and the present invention is realized in this way

Images