School of Resources and Safety Engineering,Chongqing University
State Key Laboratory of Coal Mine Disaster Dynamics and Control
School of Emergency Management and Safety Engineering,China University of Mining and Technology-Beijing
State Key Laboratory of Coal Resources and Safe Mining
CCTEG Chongqing Research Institute

乏风瓦斯(VAM)因其浓度低而难以利用,往往以通风的方式直接排放至大气中,造成了资源浪费。针对该问题,利用自建的乏风瓦斯氧化实验系统,开展了乏风瓦斯在不同浓度、进气流量、初始温度条件下掺混3种煤粉蓄热氧化实验研究,并对影响乏风瓦斯转化率的因素进行了灰色关联度分析。实验结果表明:掺混的煤粉放热量越高,乏风瓦斯转化率越高;不同乏风瓦斯浓度条件下,掺混煤粉可显著提高乏风瓦斯转化率,延长反应稳定时间;当乏风中甲烷体积分数为0.6%时,在煤粉蓄热作用下,转化率可提高50%,反应稳定持续时间提升36%;1.5m3/h的进气量可实现乏风瓦斯转化率超过50%,但稳定时间不长;初始温度越高,乏风瓦斯最大转化率越高,可达57.14%,稳定持续时间也越长,超过35min。灰色关联度分析表明,初始温度和乏风瓦斯浓度对转化率的影响程度最大。

Ventilation air methane (VAM) is challenging to utilize due to its low concentration,often being directly vented into the atmosphere,resulting in a waste of resources. To address this issue,an experimental study on the heat storage oxidation of VAM at different concentrations,air inflow rates,and initial temperatures with the mixing of three types of pulverized coal was conducted by using a self-built VAM oxidation experimental system. Furthermore,a grey relational analysis was carried out to examine the factors affecting the VAM conversion rate. The experimental results indicate that a higher calorific value of the mixed pulverized coal leads to a higher VAM conversion rate. Under varying concentrations of VAM,the addition of pulverized coal significantly enhances the VAM conversion rate and extends the reaction stabilization time. When the methane volume fraction is 0. 6%,under the heat storage effect of pulverized coal,the conversion rate can increase by 50%,and the duration of stable reaction is extended by 36%. An air inflow rate of 1. 5 m / h can achieve a VAM conversion rate of over 50%,though the stable duration is short. The higher the initial temperature,the higher the maximum VAM conversion rate,which can reach 57. 14%, with the stable duration also longer,exceeding minutes. Grey relational analysis shows that the initial temperature and VAM concentration have the most significant impact on the conversion rate.

国家自然科学基金青年科学基金项目(52304206);中央高校基本科研业务费项目(2023CDJKYJH020);煤矿灾害动力学与控制国家重点实验室面向2030重大项目(2011DA105287—MX2030-202101)

聂百胜,付昊仑,张豪,等.乏风瓦斯掺混煤粉蓄热氧化规律及灰色关联性分析研究[J].矿业安全与环保,2025,52(1):30-37.

NIE Baisheng,FU Haolun,ZHANG Hao,et al. Study on thermal storage oxidation law and grey correlation analysis of pulverized coal mixed with ventilation air methane [ J]. Mining Safety & Environmental Protection,2025,52(1):30-37.