根据碱沟煤矿煤层赋存条件、工作面开采条件及周围采空区分布状态,着重分析了+495m B3-6回撤工作面出现高浓度CO灾害气体及H2S气体等异常现象的原因。+495 m B1-2回撤工作面汲取了以上教训,采取了一系列的防灭火及快速回撤技术手段,其...根据碱沟煤矿煤层赋存条件、工作面开采条件及周围采空区分布状态,着重分析了+495m B3-6回撤工作面出现高浓度CO灾害气体及H2S气体等异常现象的原因。+495 m B1-2回撤工作面汲取了以上教训,采取了一系列的防灭火及快速回撤技术手段,其中主要包括末采阶段强化放煤、吊装硐室外移、双巷回撤和主动的防灭火技术措施,极大地提高回撤的速度及安全系数,并将回撤周期缩短至18 d,确保了+495 m B1-2工作面安全、顺利回撤。展开更多
It’s necessary to forecast the shortest spontaneous combustion period for preventing and controlling the coal spontaneous combustion.During the experimental process,a calculating model of the SSCP is established on t...It’s necessary to forecast the shortest spontaneous combustion period for preventing and controlling the coal spontaneous combustion.During the experimental process,a calculating model of the SSCP is established on the basis of the oxidative heat release intensity and thermal capacity at different temperatures.According to the basic parameters of spontaneous combustion,heat of water evaporation and gas desorption,the SSCPs of different coals are further predicted.Finally,this study analyzed the relationships of the SSCP and the judging indexes of the self-ignite tendency.The result shows that the SSCP non-linearly increases with the decrease of dynamic oxygen adsorption and increase of activation energy.Compared with the practical fire situation of mine,this reliable method can meet the actual requirement of mine production.展开更多
文摘根据碱沟煤矿煤层赋存条件、工作面开采条件及周围采空区分布状态,着重分析了+495m B3-6回撤工作面出现高浓度CO灾害气体及H2S气体等异常现象的原因。+495 m B1-2回撤工作面汲取了以上教训,采取了一系列的防灭火及快速回撤技术手段,其中主要包括末采阶段强化放煤、吊装硐室外移、双巷回撤和主动的防灭火技术措施,极大地提高回撤的速度及安全系数,并将回撤周期缩短至18 d,确保了+495 m B1-2工作面安全、顺利回撤。
基金supported by China National Science Foundation of China (Nos.51074158 and 51304189)the Youth Science and Research Fund of China University of Mining and Technology of China (No.2009A006)
文摘It’s necessary to forecast the shortest spontaneous combustion period for preventing and controlling the coal spontaneous combustion.During the experimental process,a calculating model of the SSCP is established on the basis of the oxidative heat release intensity and thermal capacity at different temperatures.According to the basic parameters of spontaneous combustion,heat of water evaporation and gas desorption,the SSCPs of different coals are further predicted.Finally,this study analyzed the relationships of the SSCP and the judging indexes of the self-ignite tendency.The result shows that the SSCP non-linearly increases with the decrease of dynamic oxygen adsorption and increase of activation energy.Compared with the practical fire situation of mine,this reliable method can meet the actual requirement of mine production.
