Power ultrasonic-assisted reservoir modification is a promising technique for enhanced coalbed methane recovery. However, the in-site performance of ultrasound-assisted CBM production has not yet been revealed. In current study, in situ antireflection test was conducted with high-power ultrasound ~18 kW underground coal seam, and investigated by measuring borehole drainage gas data field zone, ...

To improve the coal permeability and outburst prevention, coal seam water injection and a series of outburst prevention measures were tested in outburst coal mines. These methods have become important technologies used for coal and gas outburst prevention and control by increasing the external moisture of coal or decreasing the stress of coal seam and changing the coal pore structure and gas de...

Fracture flow of two-phase mixtures is particularly applicable to the coal mining and coal bed methane projects in Australia. A one-dimensional steady-state pseudo-two-phase flow model is proposed for fractured rock. The model considers free flow of a compressible mixture of air and water in an inclined planar fracture and is based upon the conservation of momentum and the “cubic” law. The flow...

The development of Wyoming’s energy resources (coal bed methane extraction [CBM], hydraulic fracturing) and carbon dioxide (CO2) sequestration sites all invariably result in the production of brackish wastewaters. The treatability of these waters varies from relatively simple for CBM water (dissolved solids < 2,000 mg/L) to complex for the water that is displaced during geologic sequestration o...

The beneficiation of coal through gravity separation plays a key role in industry, allowing for particle size distribution determination and separation of coal in to various sizes for future combustion in boilers, and separation of impurities. For a complete combustion an industrial suspension boiler using bituminous coal requires an average particle size of 45μm and 80 to 85% of particles to b...

To investigate complex fracturing and the influencing factors of simultaneous fracture propagation in horizontal wells, a three-cluster model that is controlled by surface displacement parameters established. When performing multistage on reservoirs with relatively high development degree natural fractures, staged multicluster wells one commonly used technical methods for volume fracturing. Two...

Abstract Coal bio-gasification is one in situ coal gasification technology that utilizes the digestion of organic components by methanogenic bacteria. It not only an effective to enhance recoverable reserves coalbed methane, but also important technical method promote clean utilization. Relevant laboratory researches have confirmed feasibility anthracite bio-gasification. However, complex envir...

BACKGROUND The core symptoms of bulimia nervosa (BN) and binge eating disorder (BED) are recurrent episodes of binge eating. Despite negative psychological and physical consequences, BN/BED patients show uncontrollable approach tendencies towards food. This cognitive bias occurs at an early stage of information processing. Cognitive bias modification (CBM) directly targets such biases and has b...

7 The role of the humidity content on the performance of catalytic reverse flow reactors (RFR) for the 8 abatement of methane emissions from coal mines is studied in this manuscript. It has been 9 demonstrated that this technique is very useful for the abatement, and even upgrading, of these 10 emissions. However, the effect of humidity on the reactor performance has not been addresses yet, 11 ...