TY - JOUR
TI - In-situ gas pressure calculation principle of pressure-maintaining coal samples and experimental verification in deep coal seams
AU - Gao Ming-Zhong
AU - Li Yong-Cheng
AU - Song Jie
AU - Cui Peng-Fei
AU - Hao Zong-Xin
JN - Thermal Science
PY - 2025
VL - 29
IS - 2
SP - 1159
EP - 1165
PT - Article
AB - 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.