@Article{fdmp.2023.029570,
AUTHOR = {Yun Lei},
TITLE = {Numerical-Experimental Analysis of the Coal Fracture Formation Mechanism Induced by Liquid CO<sub>2</sub> Explosion},
JOURNAL = {Fluid Dynamics \& Materials Processing},
VOLUME = {19},
YEAR = {2023},
NUMBER = {12},
PAGES = {3021--3032},
URL = {http://www.techscience.com/fdmp/v19n12/54403},
ISSN = {1555-2578},
ABSTRACT = {The highly inefficient simultaneous extraction of coal and gas from low-permeability and high-gas coal seams in
deep mines is a major problem often restricting the sustainable development of coal industry. A possible way to
solve this problem under deep and complex geological conditions is represented by the technology based on the
phase-change induced explosion of liquid carbon dioxide. In this work, the mechanism of formation of the coal
mass fracture circle resulting from the gas cracking process is theoretically analyzed. Numerical simulations show
that a blasting crushing zone with a radius of 1.0 m is formed around the blasting hole. The radius of the secondary expansion zone caused by the exploding gas is 2.0 m, and the extension limit of the explosion fracture
is 2.3 m. The gas phase change explosion is influenced by the coal roadway driving face, the gas content index
and the analytical index of coal shavings. Experiments conducted for comparison also lead to the conclusion that
the initial gas emission is increased by 3.7 times from the 100-meter borehole in the original coal mass after
coalbed gas explosion anti-reflection.},
DOI = {10.32604/fdmp.2023.029570}
}