Inner dumping site ditch reserving and discharging method beneficial to ventilation of near-horizontal opencast coal mine stope

Abstract

The invention discloses an inner dumping site ditch reserving and discharging method beneficial to ventilation of a near-horizontal opencast coal mine stope. The method comprises the steps that surface soil, rock and coal are sequentially stripped in the mining process of the near-horizontal opencast coal mine, and surface soil, rock and coal mining steps are formed; horizontally descending is carried out to a coal bottom plate and then stopping descending, and when the pit bottom distance exceeds the safe distance, the stripped objects are started to discharges inwards; an inner dumping site channel penetrating through the inner dumping site is reserved, and the inner dumping site is divided into a south inner dumping site and a north inner dumping site; and the stripping objects on the north side of the working side boundary are discharged to the north side of the inner refuse dump through a north end slope transportation flat plate, and the stripping objects on the south side of the working side boundary are discharged to the south side of the inner refuse dump through a south end slope transportation flat plate. According to the method, the three-dimensional space structure of the open pit coal mine stope and the dumping site is changed in the mode that the ditch is reserved in the middle of the inner dumping site, circulation of air and atmospheric circulation in the stope is facilitated, natural airflow of the stope is increased, dust pollution in the pit stope is reduced, the temperature inversion phenomenon in the pit is improved, and the application range is wide.

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. [0002] technical background [0003] 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. The State Council issued the "Three-Year Action Plan for Winning the Blue Sky Defense ...

AI Technical Summary

Problems solved by technology

[0004] 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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