Journal ArticleDOI
Environmentally friendly techniques for high gas content thick coal seam stimulation─multi-discharge CO2 fracturing system
TLDR
In this article, a multi-discharge CO2 fracturing system (Multi CO2 Frac) was proposed and tested in Changping coal mine, which can effectively improve coal seam permeability and further enhance gas drainage efficiency.About:
This article is published in Journal of Natural Gas Science and Engineering.The article was published on 2019-01-01. It has received 40 citations till now. The article focuses on the topics: Coal mining.read more
Citations
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Journal ArticleDOI
Experimental study of the impact of gas adsorption on coal and gas outburst dynamic effects
TL;DR: In this paper, a self-developed experimental device for the measurement of the dynamic effects of coal and gas outburst was used to perform outburst experiments under different adsorption gas conditions.
Journal ArticleDOI
Micro-structural Damage to Coal Induced by Liquid CO2 Phase Change Fracturing
TL;DR: In this paper, a combination of mechanical tests, scanning electron microscopy (SEM) and high-pressure mercury intrusion porosimetry was adopted to study the damage characteristics of coal micro-structures.
Journal ArticleDOI
Variations in surface fractal characteristics of coal subjected to liquid CO2 phase change fracturing
Journal ArticleDOI
Improving coal seam permeability and displacing methane by injecting liquid CO2: An experimental study
TL;DR: In this article, coal samples were first treated in a purpose-built liquid CO2 soaking system, and cracks on the samples' surfaces, the coal's pores structure, and its mechanical properties were studied using scanning electron microscopy (SEM), mercury intrusion porosimetry (MIP), and uniaxial compression tests.
Journal ArticleDOI
Enhanced coalbed permeability and methane recovery via hydraulic slotting combined with liquid CO2 injection
TL;DR: In this article, hydraulic slotting (HS) combined with liquid CO2 (LCO2) injection was employed to enhance coalbed permeability and the efficiency of coalbed methane recovery from a high-gas and low-permeability coalbed.
References
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Patent
Hydraulic fracturing process and compositions
TL;DR: Viscoelastic surfactant based aqueous fluid systems are described that are useful in fracturing subterranean formations penetrated by a wellbore as discussed by the authors, where the preferred thickening agents are quaternary ammonium halide salts derived from certain waxes, fats and oils.
Journal ArticleDOI
Long-hole destress blasting for rockburst control during deep underground coal mining
TL;DR: In this article, a coal seam No. 504 is extracted from the Lazy Colliery in the Ostrava-Karvina Coalfield of the Upper Silesian Coal Basin.
Journal ArticleDOI
Effective stress law for the permeability of a limestone
TL;DR: In this article, a power law for the variation of the permeability with the effective stress ( σ ′= σ − n k p f ) is proposed, and the test results are well reproduced using the proposed permeability-effective stress law.
Journal ArticleDOI
Fluid Mechanics of Hydraulic Fracturing: a Review
TL;DR: A review of the state of the art in multiphase fluid mechanics modeling of hydraulic fracturing, highlighting gaps in the body of knowledge and clarifying the questions that are still open.
Journal ArticleDOI
Coal consumption and economic growth in China
TL;DR: In this article, the authors re-examine the relationship between coal consumption and real GDP of China with the use of panel data and apply modern panel data techniques to help shed light on the importance of the heterogeneity among different regions within China.
Related Papers (5)
Enhancing coal seam gas using liquid CO2 phase-transition blasting with cross-measure borehole
Guozhong Hu,Wenrui He,Sun Miao +2 more