厚煤层综放工作面末采阶段火灾综合防治技术研究  

Comprehensive Fire Prevention and Control Technology in Final Mining Stage of Fully Mechanized Caving Face with Thick Coal Seam

作　　者：邓双飞 DENG Shuangfei(Puxian Haoxingyuan Coal Industry Co.,Ltd.,Shanxi Coal Transportation and Sales Group,Linfen 041200,Shanxi,China)

机构地区：[1]山西煤炭运销集团蒲县昊兴塬煤业有限公司,山西临汾041200

出　　处：《能源与节能》2024年第9期197-199,共3页Energy and Energy Conservation

摘　　要：13305综放工作面回采的13#煤层为Ⅰ类自燃煤层,最短发火期为33 d,采面末采期受采空区遗煤量多、采空区漏风量大、顶煤破碎、回撤通道掘进、设备回撤耗时长等多方面因素影响,采空区遗煤及架后破碎煤体自然发火危险性较高。结合13305综放工作面现场条件,对采面未出现、出现自然发火征兆2种类型提出了火灾综合防治措施,在采面未出现自然发火征兆时,通过“封堵漏风通道+预防性注氮、灌浆”方式进行火灾防治,在出现自然发火征兆时,则采用以及时惰化和阻断遗煤自燃氧化进程为核心的防灭火措施,即在原有注氮基础上通过施工密闭墙和架后注水(注三相泡沫、黄泥浆),以及拆除密闭墙后进行架间注水,以确保设备回撤安全。工程应用后,13305综放工作面末采及设备回撤期间各位置CO等气体体积分数均在安全范围内,现场使用的防灭火措施取得了显著效果。The 13#coal seam mined in 13305 fully mechanized caving face is a ClassⅠspontaneous combustion coal seam,with a minimum ignition period of 33 d.The final mining period of the face is affected by various factors such as a large amount of residual coal in the goaf,large air leakage in the goaf,top coal fragmentation,excavation of the retreat channel,and long equipment retreat time.The risk of spontaneous combustion of residual coal in the goaf and the fractured coal body behind the frame is relatively high.Based on the on-site conditions of 13305 fully mechanized caving face,comprehensive fire prevention and control measures were proposed for two types of natural fire signs that did not occur and occured in the mining face.When there were no signs of natural fire in the mining face,fire prevention and control can be carried out by sealing the air leakage channel,preventive nitrogen injection,and grouting.In case of signs of spontaneous combustion,the fire prevention and extinguishing measures centered on timely inerting and blocking the spontaneous combustion and oxidation process of residual coal shall be adopted,that is,on the basis of the original nitrogen injection,water shall be injected through the construction sealing wall and post erection(injection of three-phase foam and yellow mud),and inter erection water shall be injected after the removal of the sealing wall to ensure the safety of equipment withdrawal.After engineering application,the volume fraction of CO and other gases at each position during the final mining and equipment withdrawal period of 13305 fully mechanized caving face were within the safe range,and the fire prevention and extinguishing measures used on site achieved significant results.

关 键 词：厚煤层 自然发火 破碎煤体 防灭火措施 

分 类 号：TD752.2[矿业工程—矿井通风与安全]