Study on the Effect of Hydraulic Flushing on the Stress and Permeability Variations of Loaded Coal.

Coal seams in China are characterized by low permeability, high gas pressure, and soft coal, which lead to challenging gas extraction and severe gas disasters. Hydraulic flushing is widely used in the field to enhance the permeability of coal seams. Considering this fact, studying its effect on the stress and permeability variations of loaded coal is essential for upgrading the hydraulic flushing permeability enhancement technology.

Effect of alkyl glucoside concentration on functional group structure and adsorption characteristics of anthracite.

Context: To investigate the influence of different concentrations of surfactants on the adsorption of anthracite, the nonionic surfactant alkyl polyglucoside (APG) was selected. The study examined the adsorption characteristics of different concentrations of APG on the surface of anthracite. The results revealed the existence of two modes of APG adsorption on anthracite.

Effect of Different Placement Sequences of Water on the Methane Adsorption Properties of Coal.

After the coal seam is injected with water, the moisture content in the coal body increases, which affects the output capacity of coalbed methane (CBM). In order to improve the effect of CBM mining, the classical anthracite molecular model has been selected. To analyze the influence of different placement orders of water and methane on the characteristics of coal-adsorbing methane from the micro point of view, a molecular simulation method is used for comprehensive consideration in the study.

Study of the Micromechanism of the Effect of Fatty Alcohol Poly(oxyethylene) Ether-9 on the Wettability of Jincheng Anthracite.

The influence mechanism of the adsorption of fatty alcohol poly(oxyethylene) ether (AEO) on the wettability of anthracite coal was studied by means of experiments and simulations. First, the contact angle and surface tension were measured. When the AEO concentration was 0.