Method of Ditching and Ditching in Internal Dumps Contribute to Stope Ventilation in Near-horizontal Open-pit Coal Mine

Abstract

The invention discloses a ditch-retaining and discarding method in an inner dump that is helpful for the ventilation of the stope of a near-horizontal open-pit coal mine. The mining of a near-horizontal open-pit coal mine sequentially strips off topsoil, rocks, and coal to form topsoil, rocks, and coal mining steps; When the section reaches the coal floor, stop descending, and when the distance between the bottom of the pit exceeds the safety distance, the stripping material will start to be discharged inward; an inner dump ditch will be left to connect the inner dump, and the inner dump will be divided into two parts, the south and the north. An internal dump; the stripped material on the north side of the working gang boundary line is discharged to the north side of the inner dump site through the north end gang transportation flat plate, and the stripped material on the south side of the working gang boundary line is discharged to the inner dump site through the south end gang transportation flat plate The south side of the field; the present invention changes the three-dimensional space structure of the open-pit coal mine stope and the soil dump by leaving a ditch in the middle of the inner dump, which is conducive to the circulation of the air and atmospheric circulation in the stope, increasing the natural wind flow in the stope, and reducing the size of the pit. Dust pollution inside the stope, improvement of the temperature inversion phenomenon inside the pit, and a wide range of applications.

Description

technical field [0001] The invention relates to the technical field of open-pit mining, in particular to a ditch-retaining and discarding method in an inner dump that is helpful for ventilation in a near-horizontal open-pit coal mine stope. Background technique [0002] There are many dust-producing operations in open-pit mining, involving perforation, blasting, mining, transportation, disposal, etc., all of which are high-intensity mechanical disturbances, and the dust pollution in the stope is serious. The open-pit pit is a deep concave terrain structure with a large top and a small bottom, which is not conducive to the mutual circulation of stope air and atmospheric environment. The high concentration of dust in the open-pit mine seriously affects the health and normal operation of workers, affects the sight of mechanical workers, and increases the loss of mechanical equipment. [0003] At present, the stopes, side walls, and internal dumps formed in open-pit mining are ...

AI Technical Summary

Problems solved by technology

The high concentration of dust in the open-pit mine seriously affects the health and normal operation of workers, affects the sight of mechanical workers, and increases the loss of mechanical equipment

[0003] At present, the stopes, side walls, and internal dumps formed in open-pit mining are all in a continuous form, resulting in a three-dimensional structure of deep concave terrain in the pit, and temperature inversion phenomenon is prone to occur in the pit, and it is difficult for the air in the stope to exchange with the atmospheric environment, resulting in Serious dust pollution in stope

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