With the increase in energy demand and in mining intensity, the phenomenon of multiple
coal seam mining has appeared in major coal mining countries. While the downward mining …

Extraction of multiple seam using fully mechanized coal mining technology caused severe
deformations in the lower coal seam roadways in Zhaiyadi Coal Mine in Shanxi Province …

Weakly cemented soft rock (WCSR) strata are widespread in Western China, and their creep
characteristics with geo-stress change significantly affect coal mine safety production. To …

With the increase in mining depths, support problems of anchor such as roof accidents and
large deformation of soft rock are becoming more and more prominent. Whether the anchor …

The roadway stability of the lower coal seam (LCS) is a huge challenge to mine safety in
close-distance coal seams. Herein, the floor stress distribution law of the upper coal seam …

The primary problem needed to be solved in mining close coal seams is to understand
quantitatively the floor failure depth of the upper coal seam. In this study, according to the …

The creep characteristics of rocks pose significant challenges to the construction and
operation of tunnels. Triaxial compression tests were conducted on sandstone using the …

Aiming at the considerable deformation of the surrounding rock and the difficulty of
supporting a roadway affected by the mining of close-distance coal seams, this paper takes …

In the mining of close coal seam, the stress concentration under the residual coal pillar in the
upper coal seam leads to serious deformation to roadway surrounding rock in the lower coal …

A large amount of waste rock is generated during thin seam coal mining operations
underground. The waste rock material stacked on surface also adds to the environmental …