Patterns and security technologies for co-extraction of coal and gas in deep mines without entry pillars
Nong Zhang
Fei Xue
Nianchao Zhang
Xiaowei Feng
Keywords：Retaining gob-side entrywaysStability of boreholeGas pressure reliefCo-extraction of coal and gas without the entry pillar
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)