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Coal mining method adopting 3.55m monocolumn three-two row pipe burying top board

A coal mining method and single-column technology, applied in ground mining, earth square drilling, underground mining, etc., can solve problems such as unfavorable roof support, increased workload, and many electromechanical accidents, so as to be beneficial to health and reduce Labor intensity, the effect of improving labor efficiency

Inactive Publication Date: 2005-04-27
HENAN SUNHO COAL & POWER CO LTD
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AI Technical Summary

Problems solved by technology

Since the full height cannot be mined at one time, the bottom of the column can only be supported on the soft coal seam, the initial support force is low, the roof is separated from the layer, and the pressure moves forward, which is not conducive to supporting the roof. "Three or four rows" are used to manage the roof, which occupies more beams on the top of the column , which increases the workload, although there is a large support area, due to the large mine pressure of the roof separation layer, roof accidents such as cross-bracket support, sheet side, and roof fall often occur on the working face, and the working face adopts GW-40 type slides , many electromechanical accidents, and many of the above factors lead to slow advancement of the working face and low yield per unit area

Method used

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  • Coal mining method adopting 3.55m monocolumn three-two row pipe burying top board
  • Coal mining method adopting 3.55m monocolumn three-two row pipe burying top board

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Embodiment Construction

[0028] Please refer to Fig. 1, Fig. 2, Fig. 3 and Fig. 4. The present invention is a coal mining method using a 3.55m single column with three or two rows to manage the roof. The model of the single hydraulic support column is DZ-3.55 / 100. The beam model is HBJD-1200, which is characterized by:

[0029] The working order of the method is:

[0030] ① On the mining face, No. 2 support column 6, No. 3 support column 7, and No. 4 support column 8 jointly support the hinged No. 2 roof beam 2 and No. 3 roof beam 3, forming a second row of roof beam support. The rock top 14 is supported by the hinged roof beam, and the mining face is in the state of minimum distance control, at this time, the coal is shot and dropped, and the height of the coal dropped on the scraper conveyor 11 is above 1.5m;

[0031] ② Mining personnel 16 pedal on the coal pile, hang No. 1 roof beam 1, and hinge it with No. 2 roof beam 2 to form three rows of roof beam support for No. 1, No. No. support column 5,...

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Abstract

The present invention relates to a roof coal mining method by using 3.55 m monomer pillars and making three and two rows management control process. Said invention mainly includes the following steps: on the mining face using No.2 pillar, No.3 pillar and No.4 pillar to support mutually-hinge No.2 top beam and No.3 top beam; blasting and coal falling down, using scraper conveyor to carry coal, setting roof-protecting columns and gangue-stopping columns and others. Said invention can save top beam and pillar, improve working environment and can raise production efficiency.

Description

technical field [0001] The invention relates to the co-mining technology of coal production wells, in particular to a coal mining method using three and two rows of 3.55m single columns to manage the roof. Background technique [0002] With the rapid development of modern social economy, the demand for coal at home and abroad is increasing day by day. Improving the mining process and support method of the working face and improving the mining efficiency are an important part of the high production and high efficiency of the mine. In the past, 2.2m single hydraulic props, 1.0m hinged roof beams, and "three or four row" roof management layered mining methods were used for coal mining in gently inclined medium-thick layers. Since the full height cannot be mined at one time, the bottom of the column can only be supported on the soft coal seam, the initial support force is low, the roof is separated from the layer, and the pressure moves forward, which is not conducive to suppor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C41/18
Inventor 张光建程乐团齐明圣孔德杰张敬军常兴民孙自福王天喜常玉林崔立志刘军张金海刘广周杨洪伟程欢王凯贾新杰刘青崔云奇王欣明
Owner HENAN SUNHO COAL & POWER CO LTD
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