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A layering and partially filling coal mining method of thick seams

A thick coal seam, layered mining technology, applied in filling, ground mining, mining equipment and other directions, can solve problems such as resource loss, and achieve the effects of reducing filling cost, high coal recovery rate, and simple method

Inactive Publication Date: 2015-08-12
CHINA UNIV OF MINING & TECH
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AI Technical Summary

Problems solved by technology

[0006] Technical problem: the purpose of this invention is to overcome the deficiencies of the prior art, to provide a method that can effectively solve the problem of resource loss of coal pillars left in thick coal seam mining, and to control the layering of thick coal seams where surface deformation is within the range allowed by safety regulations partial fill coal mining method

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  • A layering and partially filling coal mining method of thick seams
  • A layering and partially filling coal mining method of thick seams
  • A layering and partially filling coal mining method of thick seams

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Embodiment Construction

[0020] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0021] The thick coal seam layered partial filling coal mining method of the present invention, its coal mining step is as follows:

[0022] a. To extract the geological conditions of the coal seam, according to the range and protection level of the surface building groups, and based on the determination of the traditional mining area range, the surface building groups are within the protection range of the filling zone, and the "buildings, water bodies, railways and major The protection level requirements of the Coal Pillar Retention and Pressure Coal Mining Regulations in Shaft Roadway are used as the standard to determine the coal filling and mining range under the mine; b. According to the thickness of the coal seam, the coal seam 5 is divided into upper and lower layers, and the top of the coal seam 5 is the roof 3, The bottom is the bottom p...

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Abstract

The invention relates to a coal mining method suitable for thick seams under buildings, railroads and water bodies, and particularly relates to a layering and partially filling coal mining method of thick seams. The method includes reasonably dividing a thick seam into an upper layer and a lower layer; subjecting the upper layer to full-filling mining firstly; and after mining of the upper layer is finished and the upper layer is stabilized, subjecting the lower layer to strip gap filling mining by adopting the upper layer as a false roof. The method can reduce loss of resources of remaining coal pillars during thick seam mining, effectively controls ground depression, has important significance for efficient mining of thick seams under "buildings, railroads and water bodies" or thick seams needing ground protection, and achieves green, efficient and safe mining of coal mines.

Description

technical field [0001] The invention belongs to the field of coal mining, and is particularly suitable for a thick coal seam layered partial filling coal mining method used for collecting thick coal seams under building groups. Background technique [0002] At present, the "three downs" (under buildings, under water bodies, and under railways) of my country's coal mines have more than 10 billion tons of coal pressure. With the development of urban construction and industrial agriculture, "three downs" of coal pressure, especially under buildings The coal will gradually increase, which not only restricts the improvement of mine production capacity, but also easily leads to low recovery rate and waste of resources, which violates the goals and concepts of sustainable development and green mining. Filling mining technology can effectively improve the utilization rate of coal resources, and at the same time effectively reduce secondary pollution and disasters caused...

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Application Information

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IPC IPC(8): E21C41/18E21F15/06
CPCE21C41/18E21F15/005
Inventor 常庆粮周华强吴锋锋王宁唐维军
Owner CHINA UNIV OF MINING & TECH
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