Bypass-air-return top coal caving mining system of extra-large-dip medium-thickness coal seam

A technology of caving top-coal in thick coal seams, applied in the mining system of top-coal caving in medium-thick coal seams with large inclination of bypass return air, can solve problems such as large safety hazards, poor construction management, difficult mechanized mining, etc., and achieve high mining efficiency , the effect of solving security problems

Inactive Publication Date: 2020-05-08
高九华
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] like figure 1 and figure 2 As shown, the working face of the pseudo-slanted long arm of the traditional flexible shield support is arranged as a coal seam 104, a rock formation 102, a broken rock formation 101, a bypass air return roadway 105, a support 103, and a lower air inlet transportation roadway 106, and the coal seam inclination angle is in the range of 45 to 90 degrees. , due to the large inclination angle, the anti-fall and anti-skid of fully mechanized mining equipment cannot be set, the personnel are not good at construction management, the safety hazard is great, and it is difficult to realize mechanized mining

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  • Bypass-air-return top coal caving mining system of extra-large-dip medium-thickness coal seam
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  • Bypass-air-return top coal caving mining system of extra-large-dip medium-thickness coal seam

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Embodiment Construction

[0025] The following description and drawings fully demonstrate the specific embodiments of the present invention so that those skilled in the art can practice them. Other implementations may include structural, logical, electrical, process, and other changes. The examples only represent possible changes. Unless explicitly required, individual components and functions are optional, and the order of operations can be changed. Parts and features of some embodiments may be included in or substituted for parts and features of other embodiments.

[0026] Such as Figure 3 to 9 As shown, in some demonstrative embodiments, the present invention also provides a bypass return air and extra large dip angle medium-thick coal caving mining system, including: mining coal seam 1, coal seam floor 2, coal seam roof 3, and lower air intake The transportation roadway 4, the process connection roadway 5, the bypass return air roadway 6, the upper gas roadway 7, the artificial roadway wall 8 alon...

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Abstract

The invention has the beneficial effects that, through technological connection of a roadway channel and a bypass-air-return roadway and technological connection of a lower air-inlet transport roadwayand an artificial gob-side entry retaining wall, a U-shaped ventilation system is formed; timely ventilation during coal mining is ensured; through exploitation layout of the roadways and installation of mining equipment, a large-angle fake-dip long-arm mining of an extra-large-dip medium-thickness coal seam is changed to a vertical-caving top coal mining mode, so coal between the lower air-inlettransport roadway and an upper gas roadway can be recovered effectively, and mechanical mining of the extra-large-dip medium-thickness coal seam is realized; safety problems of extra-large-dip mechanical mining are effectively solved, and mining efficiency is high; and mining equipment is stable and easy in installation.

Description

Technical field [0001] The invention belongs to the technical field of mining engineering, and in particular relates to a top coal caving mining system for a medium-thick coal seam with a bypass return air and a super large inclination angle. Background technique [0002] The occurrence conditions of mining steep coal seams have always been the focus of attention in the industry. Due to the difficulty of mechanized mining of steeply inclined coal seams, the mining of steeply inclined coal seams usually adopts blasting mining or abandoned mining, which leads to a lot of waste of resources, low production efficiency, and frequent safety accidents. Therefore, how to mine coal resources safely and effectively under the condition of steep coal seams is one of the problems to be solved in the coal industry. [0003] The evolution of domestic mining methods for steep coal seams can be summarized in the following five stages: [0004] The first stage of development: At the beginning of 195...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18E21F1/00E21F7/00E21F13/06
CPCE21C41/18E21F1/006E21F7/00E21F13/06E21F13/063
Inventor 高九华高嘉憶
Owner 高九华
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