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'Bottom mining and top dropping' coal mining technology for soft coal bed with firmness coefficient below 1.3

A technology of firm coefficient and soft coal seam, applied in the field of coal mining technology, can solve the problems of high efficiency and low cost of soft coal seam, and achieve the effect of low-cost mining

Active Publication Date: 2011-10-05
SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem of high-efficiency and low-cost mining of soft coal seams, the present invention provides a coal mining process suitable for "mining down and putting up" in soft coal seams

Method used

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  • 'Bottom mining and top dropping' coal mining technology for soft coal bed with firmness coefficient below 1.3

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Embodiment Construction

[0009] Such as figure 1 As shown, a coal mining process suitable for "cutting down and putting up" in soft coal seams with a firmness factor below 1.3, firstly, according to the thickness of the coal seam, a support 5 capable of supporting the full thickness is selected, and a shearer 6 and other corresponding supporting equipment and support are arranged. The front end of the roof beam 5 is equipped with a shovel plate 4, and then the shearer 6 is controlled to cut the bottom coal 1 or the middle seam coal 2, and then the upper layer coal 3 is stabbed and put on the top by the shovel plate 4 of the support, and finally reused The shearer drum is loaded with coal to complete the coal cutting process.

[0010] Ordinary hydraulic support can meet the requirements,

[0011] Shearer type selection: due to equipment manufacturing and investment reasons, the diameter of single and double drum shearer drums is smaller than the thickness of the coal seam.

[0012] Single drum sheare...

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Abstract

The invention relates to a coal mining technology, in particular to a 'bottom mining and top dropping' coal mining technology for a soft coal bed with firmness coefficient below 1.3. The invention solves the problems of low mining efficiency and high mining cost of the soft coal bed. Specifically, supports capable of supporting full thickness are selected according to the thickness of the coal bed first, coal cutters and other relevant supportive devices are arranged, a shoveling plate is installed at the front end of the top beam of each support, the feed of the coal cutters is controlled tocut coal at a bottom layer or a middle layer, the shoveling plate of the support is used to poke and drop down coal at a top layer, and after the coal at the top layer is poked down, the drums of thecoal cutters are used to load coal finally and the coal cutting technology is completed. The invention has the advantages of high mining efficiency and low mining cost.

Description

technical field [0001] The invention relates to a coal mining technology, in particular to a coal mining technology for "mining down and putting up" a soft coal seam with a firmness factor below 1.3. technical background [0002] In the current longwall comprehensive mechanized coal mining method, there are various coal mining methods such as single longwall, layered mining, full thickness mining, top coal caving, and large mining height. According to different coal seam thicknesses, coal mining methods are also being continuously improved. The degree of mechanization is gradually increasing, and the recovery rate of coal resources is also increasing, creating better economic benefits for coal enterprises. Coal mining technology has also been improved accordingly. The working face is equipped with various types of shearers, such as double-drum shearer, single-drum shearer, and coal plow, which are suitable for the mining of coal seams with different thicknesses and firmness ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/16
Inventor 闫振东程建祯
Owner SHANXI JINCHENG ANTHRACITE COAL MINING GRP CO LTD