Process of full-mechanized caving mining of multi-port as well as coal drawing

Abstract

The invention provides a process of full-mechanized caving mining of multi-port as well as coal drawing. The process mainly comprises three aspects of a coal drawing mode, a roof control mode and corollary equipment parameters. The specific operation can be described as included the following steps that multiple adjacent support coal drawing openings are opened at a time in the coal drawing process to conduct top coal drawing work at the same time; top plate management is conducted in a timely support mode through grouped moving frames after all supports close the door at the time when waste rock can be seen; the traction speed of a coal cutter is raised, the transport capacity of a scraper conveyer is improved, the speed of a scraper chain is raised, and accordingly the corollary equipment parameters are optimized. According to the process of full-mechanized caving mining of multi-port as well as coal drawing, a traditional single-port coal drawing process is improved, the process has the advantages of being high coal drawing speed and high in coal amount, meanwhile the interference times of a coal rock interface is reduced, coal drawing efficiency is improved, and the probability of mixed waste rock is lowered.

Description

technical field [0001] The invention relates to research in the field of top-coal caving mining, in particular to a multi-hole simultaneous coal caving process in fully mechanized caving mining. Background technique [0002] Fully mechanized caving mining is one of the main methods of thick coal seam mining in my country. It has developed rapidly in recent years and has achieved remarkable technical and economic benefits in coal mine production. my country's "13th Five-Year Plan" energy plan proposes that during the "13th Five-Year Plan" period, the concentration of coal resources will further increase, and the thick coal seam coal base in the west will become the main source of national coal supply. Fully mechanized caving mining, as one of the main methods of thick coal seam mining, needs to continue to improve and innovate in terms of production efficiency, recovery rate and supporting equipment level. [0003] However, in the face of new technical requirements, due to t...

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Problems solved by technology

[0003] However, in the face of new technical requirements, due to the repeated disturbance of the coal-rock interface in the existing fully mechanized caving mining technology, the gangue in the goaf is easily mixed into the bulk coal flow early, and often occurs in field operations. The premature closure of the coal discharge port leads to a low recovery rate of the top coal and a large loss of top coal. This situation is not in line with the purpose of efficient and high recovery rate development of coal resources in my country.

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