Method for sectioned construction of open-off cut of sharp inclined coal seam

Abstract

The invention discloses a method for sectioned construction of an open-off cut of a sharp inclined coal seam. The method comprises the following steps that tunneling is conducted on a small cross section of the upper segment of open-off cut: a chamber is installed at the appropriate position of an air way in advance, a prop withdrawer is installed, undercover processing is conducted on the air way position, ascraper conveyer is arranged, small cross section construction is connected on the upper segment of the open-off cut by adopting a drilling-blasting method from top to bottom, a four-directional supporting technology is adopted to perform downward tunneling for a certain distance, then a track is laid, moraine head coal and gangue are manually charged into a special bottom-discharge mine car, upward lifting is performed to reach an upper opening by utilizing the prop withdrawer, and the coal and gangue are discharged into the scraper conveyer and then is transferred to a coal bunker; a coal discharging channel is conducted at the lower segment of the open-off cut; a coal discharging channel opening position is determined in a machinery tunnel according to the tunneling direction of the upper segment of the open-off cut, construction is performed by adopting a drill machine from bottom to top, the coal discharging channel is completed in a step-by-stepchambering mode, hole protection is performed by adopting a wall protecting device, and a final hole penetrates through the upper segment of the open-off cut; whole brush expansion is conducted on the open-off cut; brush expansion and supporting are conducted on the designed cross section from top to bottom, and the coal and gangue are transported to the machinery tunnel through the coal discharging channel.

Description

technical field [0001] The invention relates to a method for opening a cut hole in a fully mechanized mining face, in particular to a method for segmented construction of a cut hole in a steeply inclined coal seam. Background technique [0002] The traditional bottom-up drilling and blasting construction method for cutting holes in the steeply inclined fully mechanized mining face poses a greater threat to safety. It is difficult for personnel to stand, carry materials, and roadway support. , when designing and arranging the coal mining face, because the inclination length is too long, the drilling positioning accuracy is low when the drilling rig is used to construct the coal passageway, and it is easy to occur deviation, sticking, and broken rods, resulting in the construction of cutting holes in steeply inclined coal seams. The long construction period has a serious impact on mining succession. Contents of the invention [0003] The problem to be solved by the present ...

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Problems solved by technology

[0002] The traditional bottom-up drilling and blasting construction method for cutting holes in the steeply inclined fully mechanized mining face poses a greater threat to safety. It is difficult for personnel to stand, carry materials, and roadway support. , when designing and arranging the coal mining face, because the inclination length is too long, the drilling positioning accuracy is low when the drilling rig is used to construct the coal passageway, and it is easy to occur deviation, sticking, and broken rods, resulting in the construction of cutting holes in steeply inclined coal seams. The long construction period has a serious impact on mining succession

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