Full-seam cutting, retreating, separate moving and full-caving comprehensive mechanized coal mining method and equipment

Abstract

The present invention provides a full-seam mining retreating separately-moving full-span comprehensive mechanized coal-cutting method and its equipment. It is mainly characterized by that it adopts full-seam mining support form, utilizes crawler-type single-drum shearer to cut coal and utilizes the separate movement of coal-cutting equipment coal-conveying equipment and supporting equipment and transporting system to implement coal-cutting operation. Besides, said invention also provides the concrete steps of said mechanized coal-cutting method.

Description

1. Technical field [0001] The invention belongs to the coal mining technology under the mine, and is suitable for large, medium and small coal mines, especially for super large coal mines, areas with complex geological conditions of large coal mines and corner coal recovery at one time full height, retreat, split movement, full span Comprehensive mechanized coal mining method and equipment. 2. Background technology [0002] At present, small and medium-sized mines generally adopt coal mining technologies such as warehouse blast mining, short-wall suspension mining, layered fully mechanized mining, top coal caving fully mechanized mining, and Wangerville warehouse mining. These coal mining processes and technologies have the following problems: [0003] 1. The recovery rate is low and the waste of resources is astonishing. Small coal mines generally adopt warehouse blast mining, and the resource recovery rate is about 25%. Large and medium-sized mines adopt layered fully me...

AI Technical Summary

Problems solved by technology

[0004] 2. Large investment and low output

Using the existing comprehensive mechanized coal mining method, the equipment has high power, heavy weight, large investment and small output

[0005] 3. High energy consumption

With the existing comprehensive mechanized coal mining method, since the mining, loading and transportation of coal are all mechanical methods, the unit energy consumption is large

[0006] 4. Low efficiency

Warehouses, layered comprehensive mechanized coal mining, blast mining, and top coal caving have complex processes, a lot of equipment, high energy consumption, many people, and low work efficiency

[0007] 5. Roof problems: Point column support is used for roof management of coal mining and blast mining in warehouses. The support strength is low, roof management is difficult, and roof accidents are prone to occur;

[0008] 6. Poor adaptability

The existing comprehensive mechanized coal mining has poor adaptability to the geological conditions of the coal seam: it is required that the coal seam should be stable, the inclination length of the working face should be more than 80 meters, and the strike length should be more than 800 meters; Column recovery and small coal mines

[0009] 7. It takes a long time to stop production and move and the construction period is long

[0012] Therefore, there are four lows in the existing coal mine underground mining technology and method, that is, low resource recovery rate, low output, low coal lump rate, and low work efficiency; three highs, that is, high investment, high energy consumption, and high risk; Long construction period and long moving time; one problem (poor adaptability)

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