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Efficient filling mining method for extra-thick coal seam

A technology of extra-thick coal seam and mining method, which is applied in the direction of filling, special mining, mining equipment, etc., can solve the problems of increasing the technical difficulty of filling and mining, and the production capacity advantages of difficult and extra-thick coal seams, so as to achieve full-volume rapid filling and reduce The weight of the equipment and the effect of simplifying the filling process system

Active Publication Date: 2020-09-22
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the filling mining of extra-thick coal seams with a thickness of more than 5m, when applying the existing longwall filling mining technology, it is necessary to carry out layered mining (about 3m in a single mining thickness), which increases the technical difficulty of filling mining. It is difficult to effectively utilize the production capacity advantages of ultra-thick coal seam mining when using the traditional backfill mining technology

Method used

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  • Efficient filling mining method for extra-thick coal seam
  • Efficient filling mining method for extra-thick coal seam
  • Efficient filling mining method for extra-thick coal seam

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Embodiment 1

[0044] Such as Figure 1 to Figure 6 As shown, when the ultra-thick coal seam high-efficiency filling mining method is matched with gangue mechanized filling process system, the following steps shall be followed:

[0045] The first step is to determine the key technical parameters of mining and filling: according to the occurrence conditions such as the thickness, burial depth, overlying rock, and shape of the extra-thick coal seam, combined with the characteristics of the mining area, surrounding rock control requirements, and technical characteristics of mining and filling equipment, reasonably determine the mining and filling. The length, advance and thickness of the working face, the length, width and depth of the mining and filling trenches, the width of the protective coal pillars between the trenches, the thickness of the protective coal pillars between layers, the width of the protective coal pillars between the roadways and other key technical parameters of mining and ...

Embodiment 2

[0053] Such as Figure 1 to Figure 5 , Figure 7 ~ Figure 8 As shown, when the high-efficiency filling mining method of extra-thick coal seam is matched with paste or paste-like filling process system, the following steps shall be followed:

[0054] The first step is to determine the key technical parameters of mining and filling: according to the occurrence conditions such as the thickness, burial depth, overlying rock, and shape of the extra-thick coal seam, combined with the characteristics of the mining area, surrounding rock control requirements, and technical characteristics of mining and filling equipment, reasonably determine the mining and filling. The length, advance and thickness of the working face, the length, width and depth of the mining and filling trenches, the width of the protective coal pillars between the trenches, the thickness of the protective coal pillars between layers, the width of the protective coal pillars between the roadways and other key techni...

Embodiment 3

[0062] Such as Figure 1 to Figure 5 , Figure 9 ~ Figure 11 As shown, when the ultra-thick coal seam high-efficiency filling mining method is equipped with gangue and cement slurry independent transportation, natural mixing, and alluvial filling process system, the following steps are followed:

[0063] The first step is to determine the key technical parameters of mining and filling: according to the occurrence conditions such as the thickness, burial depth, overlying rock, and shape of the extra-thick coal seam, combined with the characteristics of the mining area, surrounding rock control requirements, and technical characteristics of mining and filling equipment, reasonably determine the mining and filling. The length, advance and thickness of the working face, the length, width and depth of the mining and filling trenches, the width of the protective coal pillars between the trenches, the thickness of the protective coal pillars between layers, the width of the protectiv...

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Abstract

The invention discloses an efficient filling mining method for an extra-thick coal seam. The method comprises the following steps that mining and filling key technical parameters are determined; a roadway and a mining and filling production system are arranged; a mining and filling connection sequence is determined, milling type coal mining is carried out, a long "ship"-shaped deep groove goaf isconstructed, the goaf is filled, and the goaf is filled close to back; and safe and efficient mining of the extra-thick coal seam, low-cost and efficient filling of coal gangue and the like and effective protection of the ecological environment are achieved. The method can improve the coal mining capacity, reduce the coal mining cost, simplify the mining and filling connection relation, improve the filling capacity, guarantee the mining and filling safety, optimize the filling space structure, achieve full-volume filling of the goaf, simplify the filling process system, reduce the filling cost, expand the filling mining application range, liberate stagnant coal resources, improve the mine recovery rate, efficiently fill the ground and the underground coal gangue at low cost, solve the ecological environmental protection problem, and achieve coal resource development and utilization optimization and ecological environment influence minimization on the whole.

Description

technical field [0001] The invention belongs to the technical field of green mining of coal seams, and in particular relates to a highly efficient filling mining method for extra-thick coal seams, which is mainly applied to green filling mining of extra-thick coal seams with a thickness of more than 5m and solid deposits with similar conditions. Background technique [0002] my country is the world's largest energy producer and consumer. The development and utilization of coal resources has brought many ecological and environmental protection problems, such as the destruction of water resources caused by coal mining, the destruction of cultivated land caused by ground subsidence, and the efforts to liberate resources. The relocation of villages and the gangue pile on the ground have affected the local environment and ecological balance of the mining area. Coal green mining aims to optimize the development and utilization of coal resources and minimize the impact on the ecolog...

Claims

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Application Information

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IPC IPC(8): E21C41/18E21F15/00E21F15/06E21F17/00
CPCE21C41/18E21F15/005E21F15/06E21F17/00
Inventor 赵丽华高红波李涛臧立岩张建生桑宗其朱杨东陈和清
Owner TAIYUAN UNIV OF TECH
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