Work

Study on multi-source analysis and prevention of CO in return corner of composite goaf

Year: 2025

Type: article

Abstract: TThe field test used in this article is intended to examine the source of CO in the composite goaf's return corner. SF6 tracer technology is used to grasp the transfixion network of the composite goaf. The thermocouple beam tube monitoring system is used to determine the temperature in the goaf. By comparing the CO concentration distribution of the working face throughout the coal mining and overhaul periods, the impact of coal body breaking on CO concentration is examined. Based on the CO's sources, the experiments of coal ambient temperature oxidation (ATO) and coal crushing were designed. Through the comparison of the δ18O values of the experimental and field test gas samples, the proportion of 5# coal participating in the oxidation of the residual coal in the 210801 goaf was obtained, and the proportion of CO sources in the composite goaf's return corner. during coal mining and overhaul period was calculated. According to the importance of each source, a comprehensive prevention and control technology for CO overrun in return corner of the composite goaf is proposed.

Source: Case Studies in Thermal Engineering

DOI: 10.1016/j.csite.2025.107362