The stability of crown pillar is critical during the transition from open pit to underground
mining. Mining-induced fractures in the pillar form water seepage channels, which can …

In underground retreating longwall coal mining, hard roof collapse is one of the most
challenging safety problems for mined-out areas. Identifying precursors for hard roof …

The movement of double-layer hard and thick main roofs during underground coal extraction
via longwall top coal caving (LTCC) differs from that of other types of overlying strata …

The double-lane arrangement model is frequently used in underground coal mines because
it is beneficial to improve the mining efficiency of the working face. When the double-lane …

High-intensity longwall top coal caving (LTCC) mining of super-thick coal seam in high
stress conditions often leads to significant movement and failure of overburden. The …

Near‐fault severe seismic activity is frequently observed when excavating deep
underground during various engineering projects. The present study elaborates a method to …

The grout curtain in Zhangmatun iron mine, China, suffers from the leakage of water due to
the influence of multiple factors including inadequate grouting area, weak rock and mining …

Rock mass mechanical parameters change dynamically over time and space, and this
process is accompanied by the release of seismic signals. With the aid of microseismic (MS) …

The movement of hard and thick key stratum during underground coal extraction via
longwall top coal caving differs from that of other types of overlying strata. Therefore …

To analyze the plastic failure process and mechanism of gob floor in the process of close‐
distance coal seams mining, a simplified mechanical model of the lateral abutment pressure …