Dual-system two-hardness short-wall coal seam mining method

A short-wall, shearer technology, applied in surface mining, earth-moving drilling, underground mining, etc., can solve the problems of slow mining speed of working face, affecting the replacement of overlying coal seam mining, low production efficiency, etc. The effect of sustainable development, improving coal recovery rate and accelerating mining speed

Inactive Publication Date: 2015-04-22
DATONG COAL MINE GRP
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Problems solved by technology

However, the existing mining equipment and technical means of the small working face and the remaining corner coal seams are relatively backward, which not only leads to low coal production, low production efficiency, and poor safety condit

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  • Dual-system two-hardness short-wall coal seam mining method

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Embodiment Construction

[0017] Taking Sitai Mine of Tongmei Group as an example, the technical solution claimed in the present invention is further clearly and completely explained.

[0018] Sitai Mine is a super large underground mine with an annual design production capacity of 5 million tons. Since it was completed and put into operation on December 13, 1991, the output of the mine has increased year by year. In 2004, the output of the mine reached 4.8 million tons.

[0019] Sitai Minefield is located in the north of Datong Coalfield, with a length of about 13 km from north to south, and a length of about 7.5 km from east to west, with an area of ​​82.5 km2; the main coal seams mined are 10#, 11#, 12#, and 14#. The geological structure in the minefield is complex. There are currently 5 production panels in the whole mine, namely 307, 402, 404, 303, and 410 panels.

[0020] Sitai Mine is a mine with very complex geological structure and serious damage to small kilns. With the increase of mining li...

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Abstract

The invention relates to a dual-system two-hardness short-wall coal seam mining method. A coal miner suitable for hard coal seam small working face (short wall) is combined for solving the cutting problem of hard coal seams; then by researching a short-wall matching technology, a mining technology of short-wall fully-mechanized coal mining and direct cut feeding is formed; a hard ejection plate control method is matched, so that the short-wall efficient mining is realized; the mining speed of the short-wall working face is accelerated; the coal recovery ratio is improved, and the dual-system two-hardness short-wall coal mining method has important significance to the normal sustainable development of mine.

Description

technical field [0001] The invention relates to a coal seam mining method, in particular to a fully mechanized mining method with two systems and two hard short walls. Background technique [0002] Due to the vigorous implementation of high-yield and high-efficiency comprehensive mechanized mining for many years, and the layout of the working face is based on increasing the length of the working face and the mineable length, the amount of remaining coal at the corners has increased; The serious damage to the coal seam also increases the number of corner coal seams and small working faces. Many existing mines have entered the final stage of mining, so it is imperative to rely on fine mining to improve the recovery rate of mine resources and increase the mining workload of the remaining corner coal seams. At the same time, there are huge coal reserves under buildings and railways, and these resources should be rationally developed and utilized. However, the existing mining e...

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Application Information

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IPC IPC(8): E21C41/18
CPCE21C41/18
Inventor 于斌王家臣陈旭忠杨智文李杨邢彦文南培珠杨胜利赵军刘文王爱国刘锦荣纪润清刘海平付茂全
Owner DATONG COAL MINE GRP
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