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Method of mining coal from heavy pitch thick coal seam

A coal mining method and thick coal seam technology, applied in ground mining, earth drilling, underground mining, etc., can solve the problems of inability to carry out independent negative pressure ventilation, no two outlets, and thin coal seam thickness, so as to reduce tunneling efficiency, increased yield and efficiency, and the effects of increased yield and efficiency

Active Publication Date: 2012-07-25
TIANDI SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Among them, the storage coal mining method has been banned by the state order, and the lane and pillar caving coal mining method cannot be adopted due to the inability to carry out independent negative pressure ventilation and the lack of two outlets
The horizontal segmental top-coal caving mining method cannot be adopted due to the thin coal seam and the inability to arrange two roadways on the same level
At present, there is no good method for effective mining

Method used

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  • Method of mining coal from heavy pitch thick coal seam
  • Method of mining coal from heavy pitch thick coal seam
  • Method of mining coal from heavy pitch thick coal seam

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Embodiment Construction

[0012] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0013] figure 1 , figure 2 and image 3 Among them, the transportation lane 3 and the air return lane 6 are arranged at the bottom of the stage, and a working face is formed between them. The working face is arranged in a "Z" shape, and the stage height can be between 8 and 12m, and the mining height of the working face should not be lower than 2.5m. The working face advances from the boundary of Shangshan Coal Pillar 5. The top-coal caving hydraulic support 7 and the top-coal caving hydraulic supports 8 and 9 at both ends are arranged along the working face, and there is one top-coal caving hydraulic support 8 and 9 at both ends, and the number of the top-coal caving hydraulic supports 7 is determined by the length of the working face . Because the length of the working face is short, drilling and blasting are used to drop coal, and the cycle pro...

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Abstract

The invention provides a method for mining coal from a heavy pitch thick coal seam in a horizontal and segmental short wall manner. The method comprises the following steps of: supporting and caving coal by using a top coal caving hydraulic support in a work surface; drilling holes, blasting coal, and conveying the coal with a scraper conveyor; performing gob-side entry retaining by using a prefabricated metal shed or a plastic bucket. The coal-mining method can realize mechanical mining of the heavy pitch thick coal seam, greatly improves yield and efficiency of the working face and ensures safe production.

Description

technical field [0001] The invention relates to a coal mining method for steeply inclined thick coal seams, in particular to a short-wall mining method for horizontal segmental direction. Background technique [0002] Coal mining methods commonly used in steeply inclined thick coal seams are: storage mining method, roadway pillar top coal mining method, and horizontal segment top coal mining method. Among them, the storage coal mining method has been banned by the state order, and the lane and pillar caving coal mining method cannot be adopted because of the inability to carry out independent negative pressure ventilation and the lack of two outlets. The horizontal segmental top-coal caving mining method cannot be adopted because the thickness of the coal seam is relatively thin and two roadways cannot be arranged on the same level. Still do not have a kind of good method to carry out effective mining at present. Contents of the invention [0003] The invention provides ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18
Inventor 樊运策任勇徐刚毛德兵
Owner TIANDI SCI & TECH CO LTD
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