Centralized Drainage Technology and Application of Vertical Shaft in Low Permeability Thin Coal Seam Downward Drilling

Aiming at the difficult problem of centralized drainage of downward cross-layer boreholes, based on the analysis of the principle of pressure air drainage, the idea of introducing the accumulated water in boreholes into the vertical well and then centralized drainage once again is explored. The cent...

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Hlavní autor:	CHEN Hu, DENG Mingming
Médium:	Artigo
Jazyk:	Chinês
Vydáno:	Editorial Office of Safety in Coal Mines 2020-03-01
Edice:	Meikuang Anquan
Témata:	large borehole vertical well centralized and efficient drainage gas extraction low permeability and thin coal seam extraction effect
On-line přístup:	https://www.mkaqzz.com/cn/article/id/6714
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