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Coal mining method of triangle fully mechanized caving face

A technology of fully mechanized caving face and coal mining method, which is applied in surface mining, earthwork drilling, underground mining, etc., can solve the problem of "loss of triangular coal pillars", and achieve the effect of reducing coal loss and improving the recovery rate of coal resources.

Inactive Publication Date: 2013-08-21
枣庄矿业(集团)付村煤业有限公司
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Problems solved by technology

[0002] Fully mechanized top-coal caving technology has become the main mining technology for thick coal seams in my country. This technology requires that the two lanes of the mining face be parallel, and the length of the working face remains unchanged. This requires the working face to be "long". Restricted by geological conditions, especially cut by geological factors such as faults, the mineable area between fault structures is mostly irregular in shape. To solve this problem, mines often design fully mechanized top coal caving in the shape of a "knife handle". Working face, this will inevitably cause a large loss of "triangular coal pillars", and the loss rate should be above 10-20% (such as figure 1 )

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  • Coal mining method of triangle fully mechanized caving face
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  • Coal mining method of triangle fully mechanized caving face

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[0015] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0016] The invention as figure 1 , 2 , Shown in 3,4, 1, a kind of coal mining method of triangular fully mechanized caving face is characterized in that:

[0017] The first step is to strengthen the support of the roof at the position where the No. 3 support is removed in advance; from 6m before the removal of the No. 3 support, start laying double-layer metal mesh on the No. 2 support, No. 3 support and No. 4 support of the aircraft tail. , the metal mesh specification is generally 5000mm×900mm, the mesh is inclined to connect, and the upper and lower layers of metal mesh should be double-slit and double-connected. When connecting, personnel use special hooks as tools, and bind the mesh with 8# iron wire, each 8# The length of the iron wire is 300mm-400mm, and it is used after being folded in half. It is required to twist the iron wire no less tha...

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Abstract

A triangle fully mechanized caving face coal-mining method for minimizing coal loss of fully mechanized top coal caving and raising mining rate of coal resources comprises the following steps: Step 1, strengthening and supporting a top board of a No.3 support part to be removed in advance; Step 2, shortening a front transporter; Step 3, removing a No. 3 hydraulic support of a tail part; Step 4, removing a rear transporter; and Step 5, moving a tip support.

Description

technical field [0001] The invention relates to a coal mining method suitable for fully mechanized top coal caving in coal mines, in particular to a coal mining method for a triangular fully mechanized caving face. Background technique [0002] Fully mechanized top-coal caving technology has become the main mining technology for thick coal seams in my country. This technology requires that the two lanes of the mining face be parallel, and the length of the working face remains unchanged. This requires the working face to be "long". Restricted by geological conditions, especially cut by geological factors such as faults, the mineable area between fault structures is mostly irregular in shape. To solve this problem, mines often design fully mechanized top coal caving in the shape of a "knife handle". Working face, this will inevitably cause a large loss of "triangular coal pillars", and the loss rate should be above 10-20% (such as figure 1 ). In order to solve the technical p...

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Application Information

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IPC IPC(8): E21C41/18
Inventor 徐亚民刘金辉卓俊勇
Owner 枣庄矿业(集团)付村煤业有限公司