... coal mining complex reservoir china government fluid dynamics metals & mining upstream oil & gas average permeability stress sensitivity adsorption deformation coal rock underground coal gasification pyrolysis thermal expansion temperature rise coal seam gas experimental data...

... morphology is investigated. It is found that the failure mechanism of the coal rock during cryogenic shock is mainly dominated by elastic brittle tensile damage. The induced fracture morphology is more sensitive to elastic modulus and thermal expansion coefficient relative to in-situ stress difference...

... upstream oil & gas metals & mining coalbed methane trajectory coal rock simulation production monitoring coal seam gas jet impingement contour horizontal cavity completion nozzle particle rotate jet impingement stagnation point equation reservoir surveillance complex reservoir...

... stress wave in coal rock, and the coal rock can be destroyed under the action of pulsating stress and finally form a fracture network. However, the theoretical study on the fracture opening and propagation under the condition of orthotropic mechanical properties of coal rock has not been reported. Based...

.... Although the Chinese CBM industry has rapidly expanded over the past several decades, its overall yields are still at a relatively lower level. The CBM of Liulin block, which is representative of the Ordos Basin, has typical characteristics of high-rank coal rock and thus very significant research value...