Based on practical experience of coal mining beneath water bodies, unconsolidated aquifers are divided into 5 types with Fuzzy theory. A suitable treatment meth
Accordance with more than 10 shaft wall deformation and failure events in Huang-Huai regions in the east of China, this paper discusses effects to shaft wall de
The separation of ultrafine coal from three Chinese coal samples of easy degradation coal fines in water has been investigated by the application of a hydrophob
Artificially ground freezing (AGF) is one of the main methods to establish temporary support for shaft sinking in unstable water bearing strata. Domke(1915) for