Method for synergetic extraction of coal bed gas in caving type gob area and lower coal bed
A technology for old gobs and coalbed methane, applied in the field of collaborative drainage of caving old gobs and coalbed methane in lower coal seams, can solve problems such as infeasibility, small contact surface, waste of coal resources, etc., and avoid high drilling accident rate , cost-saving effect
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[0034] The following examples are intended to illustrate and explain the present invention, but not to limit the scope of the present invention.
[0035] In order to have a clearer explanation of the technical objectives, features and effects of the present invention, a method for cooperatively extracting coalbed methane from caving old gobs and lower coal seams will now be described in detail in conjunction with the accompanying drawings.
[0036] Taking a working face of Yuecheng Mine of Shanxi Coal Group as an example to illustrate the invention method: Yuecheng Mine is located in Qinshui Coalfield, which is one of the important coalfields rich in coalbed methane resources in my country, and coal can be mined in the minefield within the scope of the coalfield The No. 3 coal seam of the Shanxi Formation and the No. 9 and No. 15 coal seams of the Taiyuan Formation. Due to history and outdated mining methods, the recovery rate of No. 3 coal in the main coal seam in the coalfiel...
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