Double oblique cutting layout method for longwall fully mechanized caving face in steeply inclined coal seam

Abstract

The invention discloses a double-beveling arranging method for a long-wall comprehensive releasing operation surface of a heavy-pitch coal seam tendency. The method comprises the following steps of: arranging a beveling operation surface in an inclined form on a coal seam, and causing an inclined angle gamma of the beveling operation surface to be less than the inclined angle alpha of the coal seam, so as to reduce the pitch of the operation surface; arranging an upper smooth slot and a lower smooth slot of the beveling operation surface on the coal seam tendency; and causing the position of the lower smooth slot to be in front of the position of the upper smooth slot and causing the beveling operation surface to be an upward beveling operation surface, thereby preventing equipment on the operation surface from gliding. According to the double-beveling arranging method for the long-wall comprehensive releasing operation surface of the heavy-pitch coal seam tendency provided by the invention, the operation surface of the heavy-pitch coal seam is reasonably arranged, so that the gliding problem of the equipment on the operation surface is effectively solved, the mounting and the transporting of the equipment are convenient, and the production safety and reliability are increased.

Description

technical field [0001] The invention relates to the field of mining engineering, in particular to a method for arranging a fully mechanized caving face with steeply inclined ultra-thick coal seams moving toward longwalls and inclined layers. Background technique [0002] After decades of development of the longwall fully mechanized caving mining method, its technology and equipment have matured in the mining of horizontal and gently inclined thick coal seams. It is generally believed that the best condition for the application of fully mechanized caving technology is the thick coal seam longwall working face with an inclination angle less than 25°, and the most prominent technical problem to be solved is how to set up a reasonable working face for a steeply inclined ultra-thick coal seam with an inclination angle greater than 30° , to prevent equipment such as brackets from sliding down. At present, the longwall fully mechanized caving face of steeply inclined coal seam is ...

AI Technical Summary

Problems solved by technology

At present, the longwall fully mechanized caving face of steeply inclined coal seam is usually adopted as follows: figure 1 , figure 2 The working surface layout method shown, where figure 2 Yes figure 1 A-A to the sectional view, by figure 1 and figure 2 It can be seen that the cutting holes 3' of the working face are arranged along the coal seam inclination, and the upper trough 1' and the lower trough 2' are vertically arranged with the cutting holes 3' of the working face. By adopting this method of arranging the cutting holes of the working face, the cutting holes of the working face The inclination angle of the coal seam is the same as the inclination angle of the coal seam, so the sliding force of the equipment on the working surface is very large, and the support or the front and rear slides are easy to go down, resulting in unsafe production

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