Failure of rock mass in deep underground excavations could be attributed to a broad range
of performance malfunction, from plastic yielding of rock, generation of macro cracks on the …

The hard roof difficult to collapse easily causes gas accumulation, which threatens the
production safety of coal mine. Therefore, roof pre-cracking is required. Although blasting …

The exploitation and utilisation of coal resources guarantee the energy supply for Chinese
industry and China's economic growth. However, extensive mining also causes adverse …

An extra-deep multiple-point borehole extensometer, applicable up to 300 m depth of cover,
is introduced for the deformation monitoring of the deep rock masses (ie, the rock mass …

Stress-induced failure is among the most common causes of instability in Canadian deep
underground mines. Open stoping is the most widely practiced underground excavation …

Concrete-filled steel tubular (CFST) composite supports have a high bearing capacity and
are suitable for the support of roadway intersections with complex cross-sections and stress …

In longwall mining method, the stability of the maingate and tailgate gateroads is of great
importance because these excavations are used for essential services such as ventilation …

Underground stope stability has important implications for the safety and efficiency of metal
mining, especially when there are subsidence zones above. To analyze the stope stability …

Coal bed methane (CBM) drainage is an efficient method used to control gas hazards.
Nevertheless, borehole instability is prone to occur under repeated disturbances by external …

Over the past decades, the mining of deep underground resources has greatly expanded
due to the shortage of easily minable, near-surface mineral deposits. 1, 2 Among numerous …