Method for coal mine downhole reproduction and back production

Abstract

The invention provides a coal mine underground coal remining and extracting method, comprising: laneway disposing, mining, coal dropping, and adopting the processes of coal loading, coal conveying and timbering by a coal loading, coal conveying and anchor rod timbering mechanical integrated device and recovering from two wings, where the laneway disposing divides several segments in a mining section and disposes two preparing laneways in each segment, one as air inlet lane and the other as air return lane, after all coal in the previous segment has been mined, the air inlet lane of the previous segment can act as an air return lane for the next segment, and the next segment is made with only one air return lane, it disposes a strip house pillar in the middle of the two preparing laneways, arranges mining house, mining pillar and remains coal pillars, and determines the sizes of the mining house and mining pillar according to the characteristics of the top plate, and implements mine underground mechanical mining, makes medium-sized and small-sized mines whose 'resources have dried up' implement remining, and makes coal pillars and corner coal recovered in large-sized and medium-sized mines and makes the coal extraction ratio up to 50%-70%.

Description

technical field [0001] The invention belongs to the underground mechanical coal mining technology of coal mines, in particular to a method for recovering coal by using mechanical recovery equipment in underground coal mines. Background technique [0002] At present, the recovery rate of warehouse coal mining in my country is extremely low, only about 30%, especially in the coal fields that were mined by the warehouse coal mining method before the 1990s, the resource recovery rate is even lower. If these mine fields are not re-mined, it will cause a huge waste of coal resources in our country, especially in some mining areas, the lower group of coal has been mined without re-mining, and the upper group of coal will disappear; due to backward coal mining methods, not only small and medium-sized A large amount of valuable coal resources in mines cannot be recovered, and there is no advanced recovery method for coal pillars and edge coal in large and medium-sized mines. The was...

AI Technical Summary

Problems solved by technology

[0006] 1. Low yield: the waste of resources is serious, and the recovery rate of coal mining in warehouses is only about 30%;

[0007] 2. Low safety factor: due to the coal mining, drilling, blasting and other processes in the warehouse are all operated under the empty roof and the degree of mechanization of coal loading and transportation is low, and there are many people employed, accidents occur frequently;

[0008] 3. Low output: The degree of mechanization of the warehouse and the short-walled working face is low, and most processes are completed manually, so the unit yield of the working face is low;

[0009] 4. Too many people and low work efficiency: Most of the processes in warehouses and short-walled working surfaces are done manually, so many people are employed and work efficiency is low;

[0010] 5. Poor economic benefits: The destructive exploitation of a large amount of resources and the investment of a large amount of manpower in mining ultimately result in poor overall economic benefits

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