Sharp inclination fully mechanized coal face open-off cut square supporting method

Abstract

The invention discloses a sharp inclination fully mechanized coal face open-off cut square supporting method, which comprises the step of roadway square supporting formed by top plate supporting, left wall supporting, right wall supporting and bottom plate supporting. In the steps of left and right wall supporting, a vertical angle in the anchor rod construction at the upper shoulder pit part is properly 30 degrees, and a vertical angle in the lower anchor rod construction is properly 120 degrees, so that an anchor net is tightly pasted with top and bottom plates at contact parts, after the open-off cut operation is carried out for square supporting for a distance, a group of gangue blocking plates is arranged along the coal face trends every 20 meters for preventing the upper wall caving, gangue roller and bottom pushing, the gangue blocking plates are arranged through using anchor piles (phi=36mm, L=1.2m) to be matched with wood plates, the height of the blocking plates is 0.5m, the two ends are sealed and aligned to the coal wall, and the anchor net is adopted above the wood plates for realizing the full sealing, a gangue blocking protection net is formed, and flying gangue is effectively intercepted and blocked.

Description

technical field [0001] The invention relates to a roadway support method, in particular to a square support method for opening cut holes in a steeply inclined fully mechanized mining face. Background technique [0002] Steeply inclined coal and gas outburst coal seams adopt the comprehensive mechanized coal mining method of trending longwall and retreating, and the construction of cutting holes in the mining face is affected by complex geological structures, poor coal seam occurrence conditions, and severe gas disasters. The traditional opening construction adopts blasting from bottom to top to construct the small-section roadway through the ventilation roadway, and then blasting from top to bottom to expand to the required section. Due to the multiple blasting vibrations, it will have adverse effects on the roof and support of the roadway, and it is easy to The moraine head and the two gangs of coal were crushed, and flying gangue injured people during the transfer process....

AI Technical Summary

Problems solved by technology

The traditional opening construction adopts blasting from bottom to top to construct the small-section roadway through the ventilation roadway, and then blasting from top to bottom to expand to the required section. Due to the multiple blasting vibrations, it will have adverse effects on the roof and support of the roadway, and it is easy to The moraine head and the two gangs of coal were crushed, and flying gangue injured people during the transfer process. The labor intensity of the personnel operation was high, the safety threat was great, and the efficiency was relatively low.

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