8101工作面注氮防灭火安全技术优化设计  

Optimal design of safety technology of nitrogen injection and fire prevention for 8101 working face

作　　者：秦伟 QIN Wei(Jinneng Holding Group Sh uozhou Shuomei Wangping Coal Industry Com pany Limited,Huairen 038300,China)

机构地区：[1]晋能控股集团朔州朔煤王坪煤业有限公司,山西怀仁038300

出　　处：《建井技术》2024年第4期44-48,共5页Mine Construction Technology

摘　　要：为解决王坪煤业8101工作面采空区遗煤多、自燃风险高的问题,利用模拟软件对采空区在回采过程中覆岩应力场的演化过程进行仿真,分析采空区走向及倾向塑性区分布,根据模拟结果,明确划分水平垮落带的“三区”范围。通过对比分析得出:散热带与自然堆积区相对应;氧化带与破碎堆积区相对应;窒息带与压实稳定区相对应。模拟不同注氮条件下采空区氧气浓度分布规律,得出最优氮气注入位置为40m处,最优氮气注入量为1400m^(3)/h。将非间隔式注氮工艺的注氮防火安全技术应用于现场试验,结果表明:在埋置采空区40m处,采空区回风面氧含量显著下降,且采空区内一氧化碳含量最高不超过100mg/m^(3)。In order to solve the problem of large amount of abandoned coal and high risk of spontaneous combustion in the goaf of 8101 working face of Wangping Coal Industry,simulation software was used to simulate the evolution process of overlying rock stress field in the goaf during the mining process,analyze the distribution of goaf strike and dip plastic zone,and clearly divide the“three zones”of horizontal caving zone according to the simulation results.Through comparative analysis,it is concluded that the heat dissipation zone corresponds to the natural accumulation area,the oxidation zone corresponds to the broken accumulation zone,and the asphyxiation zone corresponds to the compacted stability zone.The distribution of oxygen concentration in goaf under different nitrogen injection conditions was simulated,and the optimal nitrogen injection position was 40 m and the optimal nitrogen injection amount was 1400 m^(3)/h.The nitrogen injection fire safety technology of nonspaced nitrogen injection process was applied to the site test.The results show that the oxygen content at the return air surface of the goaf decreases significantly at 40 m,and the maximum carbon monoxide content in the goaf is not more than 100 mg/m^(3).

关 键 词：遗煤 垮落压实 自燃三带 注氮防灭火 安全技术 

分 类 号：TD753[矿业工程—矿井通风与安全]