Coal mining method of top-coal caving with full negative pressure ventilation in horizontal section in steeply inclined thick coal seam

A coal mining method and technology for thick coal seams, which are applied in surface mining, earthwork drilling, underground mining, etc. to improve unit yield and efficiency, and ensure safe and efficient mining.

Active Publication Date: 2017-04-26
TIANDI SCI & TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to realize the trending short-wall top-coal caving mining of steeply inclined thick coal seams, the first thing to consider is to solve the problems of independent ventilation system and two safety exits of the working face

Method used

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  • Coal mining method of top-coal caving with full negative pressure ventilation in horizontal section in steeply inclined thick coal seam
  • Coal mining method of top-coal caving with full negative pressure ventilation in horizontal section in steeply inclined thick coal seam
  • Coal mining method of top-coal caving with full negative pressure ventilation in horizontal section in steeply inclined thick coal seam

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Embodiment Construction

[0014] exist figure 1 In the plan view, the moving support (8) is arranged along the trend, the top coal caving hydraulic support (9) is arranged vertically, and the coal caving tail beam is towards the bottom plate. The working face adopts top-coal caving hydraulic support (9) for top-coal recovery, transfer machine (7) for top-coal transportation, emulsion pump station (6) for support liquid supply, push support (8) for top-coal caving hydraulic pressure Lateral movement of the bracket (9). The cyclic coal discharge step of the working face is 3.0m, and the lateral frame shift step is 1.0m. After the top coal caving hydraulic support (9) performs a coal discharge cycle, the support moves 3 times. After the support moves laterally, the collapsed top coal is put into the transfer machine (7) from the rear of the top coal caving hydraulic support (9), and the coal is transported out of the working face by the transfer machine (7). Along with the advancement of the working fac...

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Abstract

The invention relates to a coal mining method of a horizontal section short wall steep thick coal seam (4-10m), namely a steep thick coal seam horizontal section full negative pressure ventilation and top coal caving coal mining method. According to the method, a top coal hydraulic bracket is used for top plate support and protection and top coal recycling in a working surface; a transfer machine is used for transferring the coal; by adopting a single body support column and air barrier separation, an air inlet and outlet system is formed, so as to realize caving of the top coal of the steep thick coal seam (4-10m).

Description

[0001] Technical field [0002] The invention relates to a coal mining method for mining a steeply inclined thick coal seam (coal seam thickness 4m to 10m) horizontally and segmentally towards short walls, which is called "horizontally segmented full negative pressure ventilation roof coal mining method for steeply inclined thick coal seams". In this method, the top coal caving hydraulic support is used for roof support and top coal recovery in the working face, the coal is transported by the reloader, and the air intake and return system is formed by using "single support + isolation wind barrier", so as to realize the steep slope. Caving mining of coal seam (4m~10m). Background technique [0003] The coal mining methods commonly used in steeply inclined thick coal seams (coal seam thickness 4m ~ 8m) are: storage mining method, roadway pillar top coal mining method, and horizontal segment top coal mining method. Among them, the warehouse-style coal mining method has been ban...

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): E21C41/18
CPCE21C41/18
Inventor王金华樊运策郭夕祥黄志增邵仲明张震薛吉胜张学亮孙晓冬
OwnerTIANDI SCI & TECH CO LTD