A tie structure for use in kilometer-deep coal mining faces

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By designing three roadway structures in a kilometer-deep coal mining face, including the lower roadway, the middle roadway, and the upper roadway, and by adopting reinforced roof support, W-shaped ventilation and drainage systems, the problems of difficult roof management, water inrush submersion of equipment, and the need to improve ventilation methods in kilometer-deep mines have been solved, thus achieving safe and efficient production.

CN224515182UActive Publication Date: 2026-07-17NINGXIA BAOFENG GROUP HONGSI COAL CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: NINGXIA BAOFENG GROUP HONGSI COAL CO LTD
Filing Date: 2025-08-29
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

In existing technologies, the working face in a kilometer-deep shaft faces problems such as difficulty in roof management, water inrush that submerges equipment, the need to improve ventilation methods, and the explosiveness of coal dust, which are difficult to solve effectively.

Method used

The technology designed on the pull-up working face in the kilometer-deep coal mining face is applied to the kilometer-deep coal mining face, the technology designed on the pull-up working face is applied to the kilometer-deep coal mining face, the pull-up working face, the coal mining face, the pull-up working face, the pull-up working face, the pull-up working face, the pull-up working face, the mining area conveyor belt uphill 2, the mining area conveyor belt uphill 2, the mining area rail uphill 3 and the mining area return air uphill 4.

Benefits of technology

It has achieved effective support for the tension structure in the kilometer-deep coal mining face, solved the problems of support in the pre-stress area, stress concentration area after end misalignment, and prevention, ventilation, explosion-proof safety and drainage during the mining period, and ensured safe production.

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Abstract

This utility model provides a tie-type structure for use in kilometer-deep coal mining faces, belonging to the field of coal mining technology. The tie-type structure includes a mining area return air incline I, a mining area conveyor belt incline, a mining area rail incline, and a mining area return air incline II. Three roadways are arranged along the coal seam: the lower roadway, the middle roadway, and the upper roadway. Coal in the lower part of the tie-type working face is transported via the lower cut-out and the middle roadway to the mining area conveyor belt incline, while coal in the upper part of the tie-type working face is transported via the upper cut-out and the middle roadway to the mining area conveyor belt incline. This tie-type structure for kilometer-deep coal mining faces solves the problems of support in areas of advanced stress, stress concentration areas after end-face misalignment, and prevention of gangue inflow into the working space, as well as ventilation and explosion-proof safety during mining operations. It is suitable for coal mining in kilometer-deep shafts.

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