Numerical-Experimental Analysis of the Coal Fracture Formation Mechanism Induced by Liquid CO_(2) Explosion

作     者：Yun Lei 

作者机构：Shenyang Research InstituteChina Coal Technology&Engineering Group Corp.Fushun113122China State Key Laboratory of Coal Mine Safety TechnologyFushun113122China 

出 版 物：《Fluid Dynamics & Materials Processing》 (流体力学与材料加工(英文))

年 卷 期：2023年第19卷第12期

页      面：3021-3032页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：supported by the National Science and Technology Major Project(Grant No.2016ZX05067004-003) 

主　　题：Low-permeability gas-rich carbon dioxide anti-reflection gas explosion 

摘      要：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 *** this work,the mechanism of formation of the coal mass fracture circle resulting from the gas cracking process is theoretically *** simulations show that a blasting crushing zone with a radius of 1.0 m is formed around the blasting *** radius of the sec-ondary expansion zone caused by the exploding gas is 2.0 m,and the extension limit of the explosion fracture is 2.3 *** gas phase change explosion is influenced by the coal roadway driving face,the gas content index and the analytical index of coal *** 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.