Large-mining-height fully-mechanized-face fast coal mining technology

Abstract

A large-mining-height fully-mechanized-face fast coal mining technology is suitable for large-mining-height fully-mechanized-face fast coal mining with a roof of a coal seam higher than medium hard level and firmness coefficient of the coal seam more than 1.0. Coal is first cut in the middle part of the coal seam, a front roller of a coal mining machine is then used for cutting top coal, a rear roller of the coal mining machine is used for cutting bottom coal, and simultaneously a hydraulic support of a coal cutting achieving part is moved, after the hydraulic support is moved, a face guard of the hydraulic support is opened to enable the face guard to be tightly attached to a coal wall. Every cycle operation goes on sequentially in a cycling mode according to the working procedures, the middle part of the coal seam is cut first, and the top coal at the upper part depends on the face guard to support so that wall caving of the coal wall and roof fall of the end face can be effectively prevented. Due to the fact that a coal cutting height is reduced, coal cutting speed is remarkably improved, and simultaneously coal of large sizes cannot be produced. Therefore, the large-mining-height fully-mechanized-face fast coal mining technology fundamentally resolves the problem that large-mining-height fully-mechanized-face large-sized coal hinders working-face coal cutting, coal charging and coal carrying, removes potential dangers of manually breaking large-sized coal, and is simple in technological operation, safe, reliable and high in efficiency.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to a rapid coal mining process for a fully mechanized mining face with a large mining height and a coal seam roof with a medium hard roof and a coal seam firmness factor above 1.0. Background technique [0002] According to relevant statistics, the proven geological reserves of coal in my country are about 1,000 billion tons, and the reserves of thick coal seams account for about 45%, while the output of thick coal seams accounts for about 40% to 50% of the total output. my country's coal industry has a decisive impact on production and economic development. [0003] It is worth noting that there are thick coal seams below 6.0m in many mining areas in my country, such as Jincheng, Lu'an, Datong, Yangquan, Xingtai, Xuzhou, Chongzhou, Fuxin, Tongchuan and Shenfu Dongsheng coalfields. What kind of coal mining method should be adopted has always been a concern of people. With the de...

AI Technical Summary

Problems solved by technology

However, due to the high mining height, there are too many large lumps of coal produced by two-way coal cutting, which seriously affects production: when the coal shearer is cutting coal at the tail of the conveyor, many large coal lumps are blocked at the entrance of the reloader, and measures need to be taken The method of shutting down and blasting is used to break it; when the shearer is cutting coal to the conveyor head, many large lumps of coal are blocked at the crusher of the shearer, and the shearer has to be stopped at this time wait for it to slowly pass the shearer

At the same time, the large pieces at the back of the coal machine affect the coal flow through the coal machine body, and have a greater impact on the conveyor chain

These problems have greatly reduced the coal cutting speed and cycle output of the fully mechanized mining face with large mining height, which seriously violated the original intention of realizing safe and efficient production at the large mining height working face

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