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Method for increasing initial mining coal recovery rate of fully mechanized caving face of extremely thick coal seam

A fully mechanized caving face and extra-thick coal seam technology, applied in ground mining, special mining, earth square drilling and mining, etc., to achieve the effect of improving recovery efficiency and improving efficiency

Active Publication Date: 2018-11-13
山西西山晋兴能源有限责任公司斜沟煤矿
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Problems solved by technology

[0005] The present invention aims to provide a method for improving the recovery rate of coal during the initial mining of fully mechanized caving working faces in extra-thick coal seams, so as to solve the technical problem of how to improve the recovery rate of coal in the initial mining of fully mechanized caving working faces in extra-thick coal seams

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  • Method for increasing initial mining coal recovery rate of fully mechanized caving face of extremely thick coal seam
  • Method for increasing initial mining coal recovery rate of fully mechanized caving face of extremely thick coal seam
  • Method for increasing initial mining coal recovery rate of fully mechanized caving face of extremely thick coal seam

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Embodiment Construction

[0033] Embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but should not be used to limit the scope of the present invention.

[0034] In the description of the present invention, unless otherwise stated, the meaning of "plurality" is two or more; the terms "upper", "lower", "left", "right", "inner", "outer" , "front end", "rear end", "top", "bottom", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating Or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be construed as limiting the invention. In addition, the term...

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Abstract

The invention relates to the technical field of coal mining, in particular to a method for increasing the initial mining coal recovery rate of a fully mechanized caving face of an extremely thick coalseam. The method for increasing the initial mining coal recovery rate of the fully mechanized caving face of the extremely thick coal seam comprises the following steps that step 1, cutting holes areformed in solid coal, the fully mechanized caving face is obtained, and drilling equipment and fully mechanized mining equipment are arranged in the fully mechanized caving face; step 2, a pluralityof blastholes of different depths are drilled in top coal of the fully mechanized caving face by the drilling equipment; step 3, explosives are loaded into the blastholes and detonate d, so that the top coal is blasted; and step 4, the step 2 and the step 3 are repeated until the top coal is caved completely. According to the method for increasing the initial mining coal recovery rate of the fullymechanized caving face of the extremely thick coal seam, a deep blasthole and shallow blasthole circulating blasting technology is adopted, and the integrity of the top coal is destroyed after blasting, so that top coal is caved completely, and the coal recovery rate at the initial mining period is increased significantly.

Description

technical field [0001] The invention relates to the technical field of coal mine mining, in particular to a method for improving the recovery rate of primary mining coal in fully mechanized caving working faces of extra-thick coal seams. Background technique [0002] The extra-thick coal seam refers to the coal seam whose thickness is greater than 8.0m. Fully mechanized top-coal caving is one of thick coal seam coal mining technologies. Its essence is to arrange a longwall working face with a mining height of 2-3m along the bottom of the coal seam (or section) in the thick coal seam, and use conventional methods for mining. The effect of mine pressure or supplemented by manual loosening method breaks the top coal above the support into loose pieces and releases it from the rear of the support, and transports it out of the working face through the scraper conveyor at the rear. Fully mechanized top-coal caving mining technology extracts the coal that needs to be extracted in ...

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Application Information

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IPC IPC(8): E21C41/18F42D1/08F42D3/04
CPCE21C41/18F42D1/08F42D3/04
Inventor 边俊奇何福胜马会忠兰晓江边小峰卫立刚陈志平马腾王宗贵
Owner 山西西山晋兴能源有限责任公司斜沟煤矿
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