A mining method of cutting coal forward and back filling in the open-pit side

Abstract

The invention discloses a mining method in which the open-pit sidewall advances to cut coal and retreats to fill. At the bottom of the sidewall pit in the open-pit mine, the roadheader automatically advances inward to cut coal in the roadway, and then uses a loading mechanism to pass the falling coal through the roadheader. The scraper chain of the roadheader is transported to the coal conveyor belt, and finally the coal is transported out of the roadway through the coal conveyor belt conveyor; when the roadheader excavates to the stop line, the roadheader automatically lowers the cutting head and controls the filling device on the roadheader to be lowered Fill the bag, and then inject the slurry into the filling bag through the slurry injection pipeline in a backward manner. The invention solves the problems of difficult recovery of open-pit end-side pressed coal and poor stability of end-side structure caused by traditional mining, improves the recovery rate of coal resources, reduces surface subsidence caused by end-side mining, and realizes green mining; in addition, The invention realizes rapid pipe layout and automation of mining and filling, significantly improves the mining efficiency and production safety of coal resources, and greatly reduces coal production costs and labor intensity of workers.

Description

technical field [0001] The invention belongs to the technical field of mining, and in particular relates to a mining method in which the open-pit end-side advances to cut coal and retreats to fill, and is suitable for open-pit end-side coal pressing mining. Background technique [0002] In the production process of open-pit mines, many coal resources are often unable to be recovered effectively, resulting in a large waste of resources. In the coal production bases of Ordos and Shenfu in the Inner Mongolia and Shanxi regions, there are a large number of open-pit mine side and hillside outcrop coal, with a total amount of hundreds of millions of tons. In the past, this part of coal resources was often abandoned or adopted low-recovery room-and-pillar mining. , Not only lost a large amount of coal resources, but also planted disasters for the stability of Duanbang. At the same time, conventional roadway mining has high intensity, low mining efficiency, and many potential safet...

AI Technical Summary

Problems solved by technology

[0002] In the production process of open-pit mines, many coal resources are often unable to be effectively recovered, resulting in a large waste of resources

In the coal production bases of Ordos and Shenfu in the Inner Mongolia and Shanxi regions, there are a large number of open-pit mine side and hillside outcrop coal, with a total amount of hundreds of millions of tons. In the past, this part of coal resources was often abandoned or adopted low-recovery room-and-pillar mining. , not only lost a large amount of coal resources, but also brought disasters to the stability of Duanbang

At the same time, conventional roadway mining has high intensity, low mining efficiency, and many potential safety hazards

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