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A combined mining method of blast mining and general mining in coal mines

A technology of joint mining and general mining, applied in the field of coal mining technology, can solve the problems of low recovery rate, large number of workers per shift in the working face, and high mining cost, and achieve the effects of improved recovery rate, strong adaptability and reduction of the number of people going down the well.

Inactive Publication Date: 2016-03-16
HENAN COLLEGE OF IND & INFORMATION TECH
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of high mining cost, low recovery rate, large number of workers in the working face and frequent personal casualties in the existing small and medium-sized coal mines, and provide suitable for medium and small coal mines. A combined mining method of blast mining and general mining in coal mines with low cost, high recovery rate, and fewer workers per shift at the working face

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  • A combined mining method of blast mining and general mining in coal mines
  • A combined mining method of blast mining and general mining in coal mines
  • A combined mining method of blast mining and general mining in coal mines

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Embodiment Construction

[0031] The core of the invention is to provide a combined mining method of blast mining and general mining in coal mines.

[0032] Below in conjunction with accompanying drawing, content of the present invention will be further described:

[0033] Such as Figure 1~Figure 9 As shown, a combined mining method of blast mining and general mining in coal mines is suitable for small and medium-sized coal mines whose mining height is controlled between 1.5-9m. One-time full-height blasting coal mining process mining, the roof is treated with the full caving method; when the average thickness of the coal seam 1 at the mining face h>2.3m, the longwall retreating general mining top coal mining is adopted, and the roof is treated with the full caving method. Specific steps are as follows:

[0034] Step 1) Drill several holes in the coal seam 1, inject pressure water through the holes to make it seep into the coal body, increase the water content of the coal seam 1, change the physical...

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Abstract

The invention relates to the technical field of coal mining processes, in particular to a blast and conventional combined mining method under a coalmine well applicable to middle and small coal mining. The method particularly comprises the steps of water injection, coal falling, nest digging, coal cutting, top support, scraper conveyor moving, bracket movement, coal placing, joist moving and the like, wherein blast coal falling or coal mining machine cutting coal falling is selected according to the average thickness of a coal bed during the coal falling. The blast and conventional combined mining method under the coalmine well has the advantages of high adaptability, increased recovery ratio, reduced coal cost per ton, and reduced number of people descending the well at one time from a working face.

Description

technical field [0001] The invention relates to the technical field of coal mine mining technology, in particular to a combined mining method of blast mining and general mining in coal mines suitable for mining in small and medium-sized coal mines. Background technique [0002] With the country's demand for energy, coal is mined in large quantities, and the mining cost of large-scale coal mines can be reduced due to large-scale production. However, due to the small scale and complex underground environment of small and medium-sized coal mines, the mining cost per ton of coal is generally high. The efficiency is low, the number of workers per shift at the working face is large, and personal casualties are frequent. How to adopt the new coal mining technology to overcome the above shortcomings, solve the safety problems existing when blasting and falling coal, and realize mining more economically, rationally, safely and efficiently has become the basic problems to be solved in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18
Inventor 毋虎城张长喜郅富标寿先淑李桦卜向峰李文中
Owner HENAN COLLEGE OF IND & INFORMATION TECH
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