Hole cutting and slope expansion construction technology for fully-mechanized working face of complex coal bed

Abstract

The invention discloses a hole cutting and slope expansion construction technology for a fully-mechanized working face of a complex coal bed, and relates to the technical field of coal mining. The construction technology solves the problems that an existing mining method is low in efficiency and safety coefficient, high in labor intensity and long in construction period, and safety production and rapid installation of cut holes are not facilitated. The construction technology includes the steps: firstly, respectively performing slope expansion on two sides of an original hole cutting area by the aid of a shipment system of an original cut hole; secondly, performing undercutting for an area below the original hole cutting area; finally respectively performing undercutting for two sides of the area below the original hole cutting area until hole cutting and slope expansion are finished. Simultaneous slope expansion of two sides of the original hole cutting area are performed, double drilling machines can parallelly work on the working surface, exposed time of roofs is shortened, working efficiency is improved, workload manually sweeping coat is reduced, and labor intensity of workers is relieved. Compared with a past construction method which is characterized in that roof brushing is firstly performed, slope expansion is performed, and upper coal is reserved, secondary supporting caused by roof brushing is avoided, and coal mining cost is reduced.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a construction technique for cutting eyelets and expanding sides in fully mechanized mining working faces in complex coal seams. Background technique [0002] For coal seams with large inclination angles and thick coal seams, and for complex coal seams, the full-height fully mechanized mining method is adopted in one-time mining, and the side-cutting and side expansion mining area is carried out according to the method of side expansion from top to bottom and bottom pulling at one time. This method has low construction efficiency, high labor intensity, and high cost. At the same time, the cut-out installation period is prolonged, and the safety factor is low, which is not conducive to safe production and fast installation of the cut-out. Contents of the invention [0003] The present invention provides a construction technique for cutting holes and expanding sides in fully ...

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Problems solved by technology

[0003] The present invention provides a construction technique for cutting holes and expanding sides in fully mechanized coal seam mining faces, which solves the problem of low working efficiency, high labor intensity, long construction period and low safety factor of existing mining methods, which are not conducive to safe production and rapid installation of cutting holes. The problem

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