西安科技大学学报2025，Vol.45Issue(5)：1044-1054,11.DOI:10.13800/j.cnki.xakjdxxb.2025.0519
氧通量对新疆苇湖梁煤燃烧过程及其判定指标的影响
Effect of oxygen flux on combustion process and its determination index of Weihuliang coal in Xinjiang
摘要
Abstract
Oxygen flux is a key parameter affecting the process of coal spontaneous combustion,its reg-ulation mechanism and critical threshold remain unclear.In order to reveal the influence of oxygen flux on the oxidation reaction kinetics and combustion process of coal,the Xinjiang Weihuliang coal samples were selected as the research object,and a temperature-programmed experiment was used to simulate the coal spontaneous combustion process,and scientific and reasonable early-warning indicators and e-valuation models for coal spontaneous combustion was proposed.The experiments adjusted oxygen flow rates to examine the variation in oxygen consumption rate,heat release intensity and oxidation kinetic parameters under different oxygen fluxes(1.043～2.433 g/s).The concentration dynamic characteris-tics of gaseous products(CO2 and CO)were analyzed,two new indicators,the CO2/CO and(CCO2+CCO)/CCO20,were proposed to quantitatively evaluate coal oxidation degree and fire risks.The results show that the oxygen consumption rate and heat release intensity increase first and then decrease with the increase in oxygen flux.A critical oxygen flux of 1.119～1.802 g/s is identified,beyond which coal oxidation reactions are inhibited.The CO2/CO quantitatively represent the degree of coal oxida-tion,while(CCO2+CCO)/CCO20 exhibites a good piecewise linear relationship with coal temperature.This relationship allows rapid monitoring of fire zone temperatures and effective fire warnings.This research provides theoretical support and technical guidance for precise early warning and scientific prevention of coal mine fires,which lays a foundation for optimizing early warning indicators and fire prevention measures in the future.关键词
煤自燃/氧通量/程序升温试验/热力学特征/判定指标Key words
coal spontaneous combustion/oxygen flux/temperature-programmed experiment/thermody-namic characteristics/determination indicators分类
矿业与冶金引用本文复制引用
卢宇涛,张国强,张飞,张丞,苏贺涛,胡佳怡..氧通量对新疆苇湖梁煤燃烧过程及其判定指标的影响[J].西安科技大学学报,2025,45(5):1044-1054,11.基金项目
国家自然科学基金项目(52474255,52004257) （52474255,52004257）
中国地质大学(北京)大学生创新创业训练计划项目(A156) （北京）
