DOI: 10.11799/ce201803017
Research and application of comprehensive control technology for spontaneous combustion and gas in goaf of high gas and easy spontaneous combustion coal seam
CAO Wen-tao
WU Chao
ZHANG Lian-kun
Abstract：The goaf spontaneous combustion and gas disaster problems in high gas coal spontaneous combustion are expounded, with N2202 worLing face as the engineering bacLground, through lab experiment, numerical simulation and industrial experiments and other means, a comprehensive technology is studied, using CO2gas injection to prevent spontaneous combustion in goaf and improve the efficiency of gas drainage. The results show that CO2gas injection maLes the gob of CH4gas concentration gradient move to the deep goaf, increase the suffocation zone range, and reduce the possibility of goaf spontaneous combustion; and part of the CH4gas adsorbed in coal body of the original goaf is replaced and released, which improves the free gas concentration in goaf, and increase the concentration of CH4gas extraction from 35.61% to 49.25%. The research results provide certain reference significance for comprehensive prevention and control of goaf in high gas spontaneous combustion seam.
Keywords：high gasspontaneous combustion in gobhorizontal branch wellCO2CH4
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 63-66,70 )