Waste filling thin coal seam tunnelling method

A technology of thin coal seam and gangue, which is applied to the field of relatively hard roof and floor, can solve the problems of high gangue extraction rate and low coal output rate in tunneling, reduce the rate of gangue per ton of coal, increase the amount of coal output during tunneling, and reduce the environment. The effect of pollution

Inactive Publication Date: 2007-08-22
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for tunneling in thin coal seams filled with gangue, which solves the problems of high gangue recove

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  • Waste filling thin coal seam tunnelling method

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Embodiment Construction

[0008] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings:

[0009] As shown in the accompanying drawings, after excavating the section of the roadway 5 that meets the formal production requirements, a certain length of coal seam is excavated along the thin coal seam 3 on both sides of the roadway 5. The specifications of the roadway 5 are generally: the width is about 2.5m, the thickness The height of the coal seam floor 4 from the thin coal seam roof 1 can reach about 1.8m, and the coal body length of the thin coal seam 3 extracted by the left and right sides can reach about 10m at most. Adhere to the shallow eye, less charge, improve the quality of the roadway. The mined coal body space is filled and reinforced with gangue excavated from the roadway, and when necessary, the filled gangue layer 2 is grouted to make it tightly in contact with the coal seam roof 1 and coal seam floor 4 to ensure that the roadway m...

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Abstract

The present invention relates to a tunneling method by filling thin coal layer with coal gangue. Said method is characterized by that after the tunnel meeting production requirements is excavated in the thin coal layer zone, the width of said tunnel section is 1.5-2 m, at two sides of said tunnel a coal layer whose length is less than 12 m is respectively excavated along the thin coal layer, then the obtained coal body space can be filled up with coal gangue obtained by tunneling, if necessary, the filled coal gangue can be grouted.

Description

technical field [0001] The invention relates to a roadway digging method for filling a thin coal seam with gangue, and is especially suitable for relatively hard roof and floor plates such as limestone and sandstone. Background technique [0002] In thin coal seam mining with a thickness of less than 1.3m, the gangue recovery rate of roadway excavation in thin coal seam is high, the coal production rate is low, and the cost is high. At present, there is no suitable method for reducing the cost of excavation in roadway of thin coal seam. method. Contents of the invention [0003] The purpose of the present invention is to provide a gangue-filled thin coal seam tunneling method to solve the problems of high gangue recovery rate and low coal yield in thin coal seam roadway excavation, reduce roadway excavation cost, and realize underground digestion and treatment of tunneling gangue. [0004] The gangue-filled thin coal seam roadway excavation method of the present invention...

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Application Information

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IPC IPC(8): E21C41/16E21F15/00
Inventor 马立强张东升王峰
Owner CHINA UNIV OF MINING & TECH
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