Geological energy is an abundant source of on Earth, encompassing both fossil and non-fossil forms such as oil, natural gas, coal, geothermal energy, shale coalbed methane [...]

Abstract Based on the fact that production of deep coalbed methane (CBM) in Yushe-Wuxiang Block is lower than expected, paper carried out uniaxial strength test and triaxial rheological coal measure strata reservoirs (mudstone, coal, sandstone their composite sample) deeper 1300 m block. In test, it found stress–strain process rock sample was similar to shallow one. The brittleness more obvious...

Sorption processes can be used to study different characteristics of coal properties, such as gas content (coalbed methane potential of a deposit), gas diffusion, porosity, internal surface area, etc. Coal microstructure (porosity system) is relevant for gas flow behaviour in coal and, consequently, directly influences gas recovery from the coalbed. This paper addresses the determination of coa...

The geochemical characteristics of water produced from coalbed methane (CBM) wells contain rich information about the associated geology, environment, and production. This study was conducted in Southern Qinshui Basin, where samples were collected 10 typical CBM their ionic compositions quality parameters tested. differences chemical between different producing coal seams single-seam production...

In coal mining, longwall mining is a preferred method to maximize production by extracting large blocks of coal that have been outlined with a set of development entries. In U.S. mines, longwall panels are typically 305 m (1,000ft) wide (with a continual trend towards even wider panels), and usually over 3,050 m (10,000ft) in length. The increasing size of longwall panels, while helping to incr...