消溶剂在采煤工作面瓦斯治理的研究与应用

Study and Application of Gas Ablating Agent for Gas Control at Coal Face

为揭示消溶剂对煤层消突的可行性,基于甲烷氧化菌与瓦斯之间的关系,以青菜塘煤矿11703采区为研究对象,选用甲烷氧化菌作为消溶剂,运用注液系统将消溶剂注入煤层试验孔,通过效验孔观察消溶剂注入前后煤层瓦斯浓度、二氧化碳体积分数、瓦斯压力和瓦斯含量的变化.结果表明:在注入瓦斯消溶剂后,由于甲烷氧化菌的分解作用,11703工作面煤层瓦斯压力有效降低,稳定至0.3~0.6 MPa;瓦斯浓度从10.07%降为1.07%;二氧化碳体积分数有所上升;瓦斯含量由12.73 m^(3)/t降为4.61 m^(3)/t.注液前后的变化,证明了微生物治理瓦斯在工程实践中的可行性.

In order to reveal the feasibility of gas ablation agent as coal seam gas outburst elimination technology,based on the relationship between methane-oxidizing bacteria and gas,this paper takes 11703 mining area of Qingcaitang Coal Mine as the research object,selects methane-oxidizing bacteria as gas ablation agent,and uses liquid injection system to inject gas ablation agent into test hole of coal seam.The changes of coal seam gas concentration,carbon dioxide concentration,gas pressure and gas content before and after ablation agent injection is observed by effect holes.Results show that after injecting gas antisol,due to the decomposition of methane oxidizing bacteria,the methane gas pressure of the 11703 working surface is effectively reduced and stabilized to 0.3~0.6 MPa.Gas concentration decreases from 10.07%to 1.07%.CO_(2) levels have risen.The gas content decreases from 12.73 m^(3)/t to 4.61 m^(3)/t.The changes before and after liquid injection proves the feasibility of microbial gas control in engineering practice.