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Full-height roof support method in ultra-thick coal seam mining

A technology of extra-thick coal seam and roof support, which is applied in special mining, surface mining, mining equipment and other directions, can solve the problems of unsatisfactory coal seam occurrence blocks, inability to recover and re-mining, and unsuitable working face for mining. The effect of eradicating hidden dangers of spontaneous combustion, increasing safe exits, and improving disaster resistance

Active Publication Date: 2015-09-16
王绍华
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  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The safety of coal mining technology in coal mining and the recovery rate of coal resources are getting higher and higher. Old mines generally have unsatisfactory coal seam occurrence blocks and poor mine field geological conditions. Mine reform coal mining methods, technical transformation and expansion investment Due to limited funds, it is not suitable to widely adopt large longwall (more than 150 meters) coal mining and heavy-duty support top-coal caving technology in the mining face
At present, the use of fully mechanized top-coal caving technology has many hidden dangers such as water, fire, gas, and impact pressure after caving, and the loss of too much top-coal, which cannot be recovered for secondary mining.

Method used

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  • Full-height roof support method in ultra-thick coal seam mining
  • Full-height roof support method in ultra-thick coal seam mining

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Embodiment Construction

[0035] Such as figure 1 and figure 2 As shown, the extra-thick coal seam adopts a full-height roof support method, including excavating a roof roadway 3, installing a frame beam cantilever support 2, installing a protective net 15, mining the top coal seam of an extra-thick coal seam under the cantilever 9, and installing a supporting roof net 16, Excavating the light support working face 13, implementing the top coal caving on the light support working face, and transporting the top coal; it is characterized in that the specific steps of the method are as follows:

[0036] (1) Excavating roof roadway 3

[0037] At the edge of the mining area at the top of the coal seam, at a distance of 15 meters in the transverse direction, excavate two roof roadways 3 suitable for the cross-section of the cantilever support of the frame beam;

[0038] (2) Install frame beam cantilever bracket 2

[0039] The frame beam cantilever support 2 is transported into the roof roadway 3, and the ...

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Abstract

The invention provides a roof supporting method for full super-high seam mining, and belongs to the technical field of coal mining. The roof supporting method for full super-high seam mining mainly solves the problems that in the prior art, after roof caving, a lot of hidden dangers such as water, fire, gas and impact pressure are caused, a large amount of top coal is lost, and secondary recovery and mining cannot be achieved. The roof supporting method for full super-high seam mining comprises the steps of digging a roof supporting roadway (3), installing a frame beam cantilever support (2), installing a protection screen (15), mining a top coal layer of an super-high seam below a cantilever (9), installing a supporting roof screen (16), digging a light-type support working face (13), placing top coal on the light-type support working face, and conveying the top coal away. By means of the roof supporting method for full super-high seam mining, convenience is brought for a goaf to be timely sealed for a long-acting stage, and the hidden spontaneous combustion danger caused by coal left in the goaf is eliminated.

Description

technical field [0001] The invention belongs to the technical field of coal mining, and in particular relates to a full-height roof support method for extra-thick coal seam mining. Background technique [0002] The safety of coal mining technology in coal mining and the recovery rate of coal resources are getting higher and higher. Old mines generally have unsatisfactory coal seam occurrence blocks and poor mine field geological conditions. Mine reform coal mining methods, technical transformation and expansion investment Funds are limited, and it is not suitable to generally adopt large longwall (more than 150 meters) coal mining and heavy-duty support top-coal caving technology in the mining face. At present, the use of fully mechanized top-coal caving technology has many hidden dangers such as water, fire, gas and impact pressure after caving, and the loss of too much top coal, which cannot be recovered for secondary mining. Contents of the invention [0003] The purpo...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D19/02E21C41/28
Inventor 王绍华肖占文李谋方燕燕苏国军
Owner 王绍华
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