Work

In-situ gas pressure calculation principle of pressure-maintaining coal samples and experimental verification in deep coal seams

Year: 2025

Type: article

Abstract: Accurate determination of in-situ gas pressure in deep coal seams is the basic guarantee for safe production in coal mines, therefore, this paper is based on the in-situ pressure maintaining coring technology of deep coal seams, the gas pressure equilibrium process of pressure maintaining coal cores was simulated by carrying out decompression desorption experiments to validate the principle of in-situ gas pressure calculation for pressure maintaining coal samples of deep coal seams. The results of the study show that the theoretical values of in-situ gas pressure are in good agreement with the experimental values. The mean deviation is 0.126 MPa, 0.194 MPa, respectively, the average error is 5.085% and 8.319%, respectively. The experiments of desorption of pressure maintaining coal samples verified the reliability of the in-situ gas pressure calculation principle.

Source: Thermal Science

DOI: 10.2298/tsci2502159g

Authors: Ming-Zhong Gao, Yong-Cheng Li, Jie Song, Peng-Fei Cui, Zong-Xin Hao

Institutions: Shenzhen University, Sichuan University

Language: English

Topic: Coal Properties and Utilization

Subfield: Ocean Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $161

Funder: National Key Research and Development Program of China