Equipment matching method for fully mechanized mining working surface with large mining height

Abstract

The invention relates to an equipment matching method for a fully mechanized mining working surface with large mining height. For the once full mining height fully mechanized mining working surface with large mining height, as the height of an upper and a lower drift section is lower than the mining height of the working surface and the height difference reaches 1-3m, the triangular coal loss on top of transitions sections at upper and lower ends of the working surface and the aggravated unbalance loading of a support are caused during transition from hydraulic supports at two ends of the lower and upper tunnels gradually to the middle of the working surface with normal mining height through a transition hydraulic support by the equipment matching method of the normal working surface. In the invention, transition goes from the hydraulic supports at two ends of the lower and upper tunnels directly to the middle of the working surface with normal mining height through a special end hydraulic support by great gradient. The transition method by great gradient obviously reduces the triangular coal loss on top of transitions sections at upper and lower ends of the working surface, improves the loaded status of the hydraulic supports and boosts the recovery rate of coal. A side guard plate is adopted at the lap joint side of the special end hydraulic support and the end hydraulic support to realize lap joint matching by great gradient.

Description

technical field [0001] The invention relates to a matching mode of a hydraulic support, a coal shearer and a scraper conveyor in a large mining height working face of a coal mine, and is suitable for a full-height and large mining height fully mechanized mining working face of a coal seam thicker than 5m. technical background [0002] High-efficiency and intensive production of coal is the mainstream of the development of the world's coal industry, and it is also the direction of the development of my country's coal industry. One-shot mining with full height and large mining height is one of the most effective methods to achieve efficient and intensive production in thick coal seams. With the advancement of large mining height mining technology, the mining height continues to increase. At present, the coal seam mining height of the working face has reached 7m, while the roadway height of the working face is limited by the tunneling equipment and support technology, generally ...

AI Technical Summary

Problems solved by technology

The matching method of conventional working face equipment is to gradually transition from the hydraulic supports at the ends of the upper and lower tunnels to the normal mining height in the middle of the working face through several or even dozens of transitional hydraulic supports. The loss of coal and the eccentric load of the support are intensified, and with the increase of the mining height of the working face, the loss of the triangle coal at the top increases, and the waste of coal resources becomes more and more serious

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