Over the past decade, the exploration and development of deep coalbed methane (CBM)
resources in China have attracted significant attention for their immense potential. Typically …

Coalbed methane (CBM) drilling technology is critical in achieving efficient CBM
development. The geological conditions for CBM development in China are complex …

Deep rock tunneling exhibits a significant three-dimensional (3D) space effect. The complex
stress path and extrusion deformation during excavation are the most significant and …

With 59 sets of well testing data from 32 wells, 70 coal seam gas data from 9 wells, and
production data from 17 wells, the in situ stress distribution within depths of 136-1244 m and …

In deep underground coal mining, engineering activities are performed within anisotropic in-
situ stress fields due to engineering disturbances and tectonic stress. Many such activities …

The permeability of coal reservoirs is generally low in most of the mine areas in China.
Using the stress-relief effect of the foremost-mined coal seam mining to increase the …

Many gas pre-drainage boreholes are generally constructed in coal seams to ensure safe
underground operation. True triaxial experiments were conducted to study the mechanical …

The nonlinear stress and deformation response of tunnel excavation unloading under high
and complicated geostresses are important features of deep rock tunnel engineering, and …

Gas desorption and diffusion in pore is not only an important behavior to control the law of
gas migration, but also an important theoretical basis for the proposal and optimization of …

Deep coalbed methane (CBM) resource potential is enormous in China, and has become a
new field for unconventional natural gas exploration and development. This work discusses …