Publications by authors named "Fenjin Sun"
The Zhuozishan coalfield at the western margin of the Ordos Basin is one of the main coal-mining areas in China, and recent explorations have revealed the great potential for coalbed methane (CBM) resources in its Carboniferous and Permian strata. In this paper, the controlling factors of CBM enrichment of the major coals are studied in this coalfield and the CBM resources are estimated based on the analysis of the coal petrology and compilation of literature data on the gas content. The result of the coal petrology analysis of 10 samples shows that the vitrinite content of No.
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- The study tested sandstone samples at temperatures ranging from room temperature to 1000 °C to analyze changes in their thermophysical and mechanical properties.
- Results indicated that properties like specific heat capacity and thermal expansion coefficient increased initially with temperature, then decreased, while thermal conductivity consistently declined.
- It was also found that as temperature increased, the peak strength of sandstone initially rose but later dropped, indicating a shift from brittle to ductile failure, which is important for understanding UCG project safety and site selection.