阻化剂对矿井采空区CO2封存与防火影响

Influence of inhibitors on CO storage and fire prevention of mine goaf

为探究阻化剂对矿井采空区CO2封存与防火规律,采用实验与理论分析的方法,对不同阻化剂进行吸附实验,推导BET二常数公式,分析不同阻化剂条件下煤样吸附二氧化碳的变化规律,计算了阻化剂对煤样氧化阶段活化能的影响.研究结果表明:经阻化过的煤样对比原煤CO2的吸附量达到原煤吸附量的1.43~1.73倍;阻化后煤样着火活化能达到原煤的1.29倍以上.研究结论初步证明喷洒阻化剂不仅能增加煤层CO2的封存量,还会降低煤的自燃倾向性,实现节能减排和灾害治理的统一.

In order to explore the influencing rules of inhibitors on CO2 storage and fire prevention of mine goaf,this research carried out experiment and theoretical analysis,performed absorption experiment on different inhibitors,derived the BET two-constant formula,analyzed the change rule of coal sample’s absorption of CO2 under different inhibitor conditions and calculated the influence of inhibitors on activation energy in oxidation stage of coal sample.According to research results,the inhibited coal sample has a CO2 absorbing capacity 1.43~1.73 times of raw coal.After inhibition,the ignition activation energy of coal sample is at least 1.29 times of that of raw coal.The conclusion of research preliminarily proves that the spraying of inhibitors can not only increase CO2 storage of coal seam,but also reduce spontaneous combustion tendency of coal and realize the unification of energy conservation,emission reduction and hazard control.