Opencast coal mine end slope filling mining method

Abstract

Provided is an opencast coal mine end slope filling mining method. The opencast coal mine end slope filling mining method includes the steps that a coal pillar reserved at an opencast coal mine end slope is divided into a plurality of stalls which are equal to an end slope coal mining machine roller in width; a stowboard is tunnelled to the position of an earth surface safety boundary line in the coal seam trend direction, and a stowboard is tunnelled in the coal seam inclination direction; an end slope coal mining machine is used for mining the stalls on the side of the stowboard in the coal seam inclination direction at intervals, after mining of the stalls is completed, the end slope coal mining machine is removed, mining openings in the sides of stall side slopes are sealed, and filling is performed on the stalls which are mined at intervals; then, mining is performed on stalls at intervals, the stalls are not mined, filling is performed on the mined stalls, and the steps are repeated until mining of all the stalls which are not mined is completed. According to the opencast coal mine end slope filling mining method, rock and soil discharged by an opencast coal mine can be effectively used, the discharge amount of the rock and soil of the opencast coal mine is reduced, the stripping ratio is lowered, mines end slope coal resources are mined in a maximization mode, meanwhile the side slope safety is guaranteed, and the efficient environment-friendly production process of the opencast coal mine is achieved.

Description

technical field [0001] The invention relates to a mining method, in particular to a mining method for the side of the open-pit coal mine used in the mining of the side of the side of the open-pit coal mine. Background technique [0002] Open-pit coal mining is an important part of my country's coal mining industry and undertakes important coal mining tasks. For a long time, the side walls of open-pit coal mines have been recovered mainly by auger drills or side-side coal mining machines, and safety coal pillars have to be left, so the recovery rate is very low and resources are wasted seriously. However, under the long-term action of the overlying strata, the safety coal pillars left may become unstable, causing side slope landslides, and endangering the production safety of open-pit coal mines. Due to limited conditions, open-pit coal mines sometimes have to build external dumps, which not only directly occupy the land, cause water and soil pollution, but also endanger the...

AI Technical Summary

Problems solved by technology

For a long time, the side walls of open-pit coal mines have mainly been recovered by auger drills or side-side coal mining machines, and safety coal pillars need to be left, so the recovery rate is very low and resources are wasted seriously

However, under the long-term action of the overlying strata, the safety coal pillars left may become unstable, causing side slopes and landslides, endangering the production safety of open-pit coal mines.

Due to limited conditions, open-pit coal mines sometimes have to build external dumps, which not only directly occupy the land, cause water and soil pollution, but also endanger the growth of vegetation and destroy the local ecological and natural environment

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