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Mining modes of backstopping, separating, backfilling and X for mine mining and beneficiation

A mode, mine technology, applied in the direction of filling, ground mining, mining equipment, etc., can solve the problems of unfavorable engineering application promotion, no system formation, etc., and achieve the effect that is conducive to engineering popularization and application

Active Publication Date: 2019-01-15
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the mining methods based on the "mining, selection and filling" system to meet certain engineering requirements of the mine are mostly applied to a certain working face of a certain mine, and no systematic and comprehensive mining methods have been formed, and most The "mining, selection and filling" system is a reformed system, which is not easy to form a good matching and connection with the mine's original production system, and is not conducive to the promotion of engineering applications

Method used

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  • Mining modes of backstopping, separating, backfilling and X for mine mining and beneficiation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A mine in Shandong has been adopting the strip coal mining method since the well was built, leaving a large number of protective coal pillars, resulting in sluggish coal volume, resulting in a low recovery rate of resources; and the existing coal seam is seriously mixed with gangue; the mine has a large amount of eolian accumulation on the surface Sand, has been tested to have excellent cementation and conveying properties. In order to improve the recovery rate of coal resources in this mine, reduce the gangue content rate and dispose of gangue on site, at the same time, considering the supporting connection between various production systems, follow the principle of "less excavation for sorting awnings, and less space for sorting systems". According to the principle of the mine, select a suitable mining, selection and filling system according to the actual situation of the mine to achieve the mine production target.

[0029] Such as figure 1 As shown, a kind of mine s...

Embodiment 2

[0035] A mine in Henan has a mining depth of more than 1100m, and auxiliary lifting has become a major problem; 15 coal seams are mainly mined. The original gas content of this coal seam is 15.256m3 / t, the original gas pressure is 1.78MPa, and the air permeability coefficient is only 0.0776m2 / MPa2d, which belongs to high gas , low permeability, low drainage coal seam; coal seam 14 above the 15 coal seam is unstable, and the thickness of the coal seam is only 0.5m, which does not meet the technical conditions for conventional protective seam mining. In order to safely mine the protective layer for gas pressure relief and increase permeability, to achieve the purpose of co-mining 15 coal and gas, and to process the gangue mined during the mining of the protective layer underground, it is necessary to select a suitable mining selection according to the actual situation of the mine. charging system to meet mine production goals.

[0036] Such as figure 1 As shown, a kind of mine ...

Embodiment 3

[0042] The main coal seam of a mine in Inner Mongolia has complex occurrences of coal seams, large changes in coal seam thickness, many faults over the size of the working face, and serious gangue inclusions in the coal seam of the working face, resulting in increased mine lifting costs; pollute the environment around the mine. In order to solve the problem of gangue inclusion in the coal seam of this mine and transport the ground gangue to the underground for filling treatment, it is necessary to select a suitable mining, selection and filling system according to the actual situation of the mine to achieve the mine production target.

[0043] Such as figure 1 As shown, a kind of mine selection filling+X mining mode includes the following steps:

[0044]The first step, according to the above factors, select the "mining, selection and filling" system suitable for the actual production needs of the mine: a small amount of coal mining system with mixed gangue, a selective crushi...

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Abstract

The invention discloses mining modes of backstopping, separating, backfilling and X for mine mining and beneficiation. Altogether four mining modes of backstopping, separating, backfilling and X are disclosed in the invention, i.e., a mining mode of backstopping, separating, backfilling and entry-retaining, a mining mode of backstopping, separating, backfilling and treating, a mining mode of backstopping, separating, backfilling and pumping, and a mining mode of backstopping, separating, backfilling and controlling. The selection of the mining modes of backstopping, separating, backfilling andX is determined by actual engineering needs. At first, the three major systems of backstopping, separating and backfilling are determined according to the geological and hydrological conditions of amine, mine system layout, requirements on the backstopping, separating and backfilling capacities of the mine, the mining location of coal resources and other factors; then an X production system is determined according to the actual engineering needs and technical problems of the mine; so a mining mode of backstopping, separating, backfilling and X is formed. According to the invention, by designing the backfilling rate of goafs, the actual engineering needs of the mine are met, technical problems in resource exploitation of the mine are overcome, and the purpose of green, harmonious and safemining of coal resources are achieved. Compared with the conventional mining mode of backstopping, separating and backfilling, the mining modes of the invention are more systematic and comprehensive,and are beneficial for promotion and application in projects.

Description

technical field [0001] The invention relates to a coal seam mining method, in particular to a mine mining, selection and filling+X mining mode, and belongs to the technical field of coal mining. Background technique [0002] The traditional roof caving coal mining method, the roof caving after mining, will cause environmental problems such as surface subsidence and gangue discharge. It is necessary to lift the mixed gangue of underground raw coal to the bottom surface, and after washing, it will be transported to the working face by the feeding machine for filling operation. The auxiliary lifting of the mine and the ground coal washing plant are under high pressure and high cost. The integrated production mode of mining, selection and filling developed on this basis takes underground coal mining, sorting and filling as a whole to achieve a high degree of coordination in mine development layout, production system layout, and mining, selection and filling equipment capacity ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/16E21C41/18E21F15/00
CPCE21C41/16E21C41/18E21F15/00
Inventor 张吉雄张强齐文跃李猛孙建峰孟国豪
Owner CHINA UNIV OF MINING & TECH