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A super-high recovery roadway support method with top coal in thick coal seams

A technology for mining tunnels and thick coal seams, which is applied to roof beams, tunnels, and mining equipment supporting the roof of mines, can solve problems such as unstable occurrence and large thickness of coal seams, and achieve improved recovery, good social and economic benefits. Effect

Inactive Publication Date: 2020-01-17
HENAN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, due to the large thickness of the coal seam and its unstable occurrence, the roadway is excavated neither along the top nor the bottom, but is arranged in the middle of the coal seam. This type of roadway excavation results in the top coal on the top of the roadway and the bottom of the roadway. Bottom coal, the roadway adopts U-shaped arch support to support the top coal

Method used

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  • A super-high recovery roadway support method with top coal in thick coal seams
  • A super-high recovery roadway support method with top coal in thick coal seams
  • A super-high recovery roadway support method with top coal in thick coal seams

Examples

Experimental program
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Effect test

Embodiment 1

[0039] The structure of the arched mining roadway after the reinforced top beam support is as follows: the upper end of the U-shaped arched beam 2 is provided with an anchor cable 7 at an equal angle upward, and the lower end of the anchor cable 7 extends into the U-shaped arched beam 2 and is provided with anchors. Soto beam 8;

Embodiment 2

[0041] The structure of the arch mining roadway after the first undercover twisting roof support is: the upper side of the roadway 13 and the lower side of the roadway are arranged vertically downward on both sides of the U-shaped arch beam 2, and the upper side of the roadway 13 and the lower side of the roadway 14 is evenly extended into the coal seam 1 and is provided with a number of threaded steel anchor rods 6. A number of wooden piles 10 are arranged horizontally through the single hydraulic prop 11 and U-shaped arch beam 2 at the bottom of the roadway, and the longitudinal space between the wooden piles 10 is vertically arranged with a number of logs 9;

Embodiment 3

[0043] The structure after the second undercover winch support of the arched mining roadway is: on the basis of the first undercover winched roof support of the arched mining roadway, the number of round logs 9, wooden stacks 10, and glass fiber reinforced plastic anchor rods 5 is increased;

[0044] The invention effectively solves the support problem of the ultra-high mining roadway with the top coal in the thick coal seam, realizes mining along the bottom of the working face, improves the recovery of coal resources, and has good social and economic benefits.

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Abstract

The invention discloses a supporting method applied to a thick coal seam ultra-high mining roadway containing supporting of top coal. The supporting method adopts ''a bolt-mesh-anchor, a U-shaped arciform beam, a nog, a pi-shaped beam and a single hydraulic prop'' fractional dinting top stranding combined supporting technology, and the supporting height of the roadway is more than 6m. The specificuse method comprises the steps that before a working face is mined, reinforced retaining is carried out on an original U-shaped arciform beam supporting the top coal advanced 60m of the working face,U-shaped tunnel legs are removed, and reinforced supporting is carried out on the side portions of the roadway; and fractional dinting top stranding is then carried out, the roadway side portion support is supplemented, and finally a supporting method of the fractional dinting top stranding combined supporting technology is carried out on the roadway. The supporting method effectively solves theproblem that supporting is difficult to carry out for recovering bottom coal when the ultra-high mining roadway (the height of the roadway is more than 6m) is arranged in a dinting mode and when the working face of the arched mining roadway containing supporting of the top coal and arranged by an unstable thick coal seam is mined, and good social and economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of roadway support, in particular to a super-high recovery roadway support method applied to a thick coal seam containing top coal. Background technique [0002] The mining roadway is used as the roadway of the coal mining face. Generally, it is excavated along the top or along the bottom, and its cross-sectional shape is rectangular or trapezoidal. However, when there are faults or geological structures in the thick coal seam, the surrounding rock is relatively broken, and it is difficult to use active support with anchor mesh cables. In order to facilitate roadway support, U-shaped arch passive support is usually used in roadways. In addition, due to the large thickness of the coal seam and its unstable occurrence, the roadway is excavated neither along the top nor the bottom, but is arranged in the middle of the coal seam. This type of roadway excavation results in the top coal on the top of the roadway a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21D11/18E21D15/44E21D17/00E21D20/00
CPCE21D11/18E21D15/44E21D17/006E21D20/00
Inventor 张盛王小良郑玉晶赵文峰吴自强王龙飞刘建康刘宇鹏闫淑雯王千红
Owner HENAN POLYTECHNIC UNIV