Method for achieving coal pillar mining replacement through gangue strip filling

A technology of strip filling and coal pillars, which is applied in the direction of filling, safety devices, mining equipment, etc., can solve the problem of inability to realize the comprehensive utilization of power plant fly ash, high salt water and mine gangue, large output of gangue, and limited processing capacity problems such as avoiding ground relocation, reducing ground stacking, and improving recycling rates

Pending Publication Date: 2018-11-06
CHINA UNIV OF MINING & TECH +1
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AI Technical Summary

Problems solved by technology

[0003] Due to the huge amount of gangue output in mines, coupled with the large amount of fly ash and high-salt water produced by supporting power plants, coal-electricity integration enterprises need to process a large amount of waste and wastewater every year. High and violation of environmental protection policies, etc., so it is necessary to seek an efficient and green comprehensive utilization method
[0004] The traditional filling method cannot realize the comprehensive utilization of power plant fly ash, high salt water and mine gangue. The new filling method needs to meet the comprehensive treatment of waste and wastewater while realizing the replacement mining of coal pillars, improving the resource recovery rate and increasing economic benefits.

Method used

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  • Method for achieving coal pillar mining replacement through gangue strip filling
  • Method for achieving coal pillar mining replacement through gangue strip filling
  • Method for achieving coal pillar mining replacement through gangue strip filling

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Embodiment Construction

[0022] The following is attached Figure 1-3 The present invention is further described. A method for replacing coal pillars by using gangue strip filling mining, which adopts the scheme of strip filling mining underground in coal mines, and the specific implementation methods are as follows:

[0023] 1) The transportation lane 1, cutout 2, and air return lane 3 dug in advance form a ventilation circuit to form full negative pressure ventilation. Divide the coal pillar into several mining strips, reasonably determine the length and width of the strip units, and number them in sequence (1), (2), (3), (4), (5)....

[0024] 2) Strip units are mined by continuous miners, and units (1), (3), (5), (7)... are mined sequentially. The continuous miner 4 adopts an automatic coal loading mode, and the reloading and transportation of coal gangue are completed by the mining shuttle car 6 and the belt conveyor 7. When mining coal, local fan ventilation is required. After the strip unit i...

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Abstract

The invention belongs to the field of waste disposal and mine coal extraction methods, and relates to a method for achieving coal pillar mining replacement through gangue strip filling, in particularto a waste comprehensive utilization method for coal-electricity integrated enterprises. Down-hole coal pillars are replaced through power plant flyash, heavy salt water and mine waste gangue, and theresource recovery rate and the economical benefits are increased.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and in particular relates to a method for mining and replacing coal pillars with mine waste filling. Background technique [0002] At present, my country's "three-down" coal mining is huge, and the coal mining methods under buildings, railways and water bodies are collectively referred to as "three-down" coal mining. In order to control the surface subsidence, the filling method is generally used to manage the goaf roof . According to different coal mining methods, the filling methods include room-and-pillar filling mining and longwall filling mining; according to different filling materials, there are several filling methods such as gangue filling, paste filling and high-water filling material filling. [0003] Due to the huge amount of gangue output in mines, coupled with the large amount of fly ash and high-salt water produced by supporting power plants, coal-electricity integration e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F15/00
CPCE21F15/00E21F15/005
Inventor 柏建彪卞卡
Owner CHINA UNIV OF MINING & TECH
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