煤矿安全2024，Vol.55Issue(11)：19-27,9.DOI:10.13347/j.cnki.mkaq.20240710
矿井水酸碱度对遗煤氧化的影响及微观作用特性
The effect of mine water pH on residual coal oxidation and its microscopic action characteristics
摘要
Abstract
In order to study the effect of pH value of mine water on the spontaneous combustion characteristics of residual coal in goaf,long-flame coal from Pingdingshan Coal Mine was used to analyze the gas production law and heat flow curves of gas derived from low-temperature oxidation stage by using C600 high-precision microcalorimeter and gas chromatograph.Based on the experi-mental results,the microscopic mechanism was discussed.The results show that soaking in acidic aqueous solution significantly pro-motes the oxidation property of coal,and the higher the acidity,the greater the impact,while the soaking in alkaline aqueous solu-tion inhibits the oxidation property of coal sample.It is concluded that the reaction between acid solution and minerals in coal may increase the porosity of coal and promote the process of spontaneous combustion of coal.The reaction of alkaline solution with coal sample produced sediment,which inhibited the spontaneous combustion reaction of coal to a certain extent.关键词
矿井水酸碱度/采空区/水浸煤/热动力学/遗煤自燃/标志气体Key words
mine water pH value/goaf/water immersed coal/thermodynamics/residual coal spontaneous combustion/index gas分类
矿业与冶金引用本文复制引用
潘荣锟,汪志国,胡代民,袁纪为..矿井水酸碱度对遗煤氧化的影响及微观作用特性[J].煤矿安全,2024,55(11):19-27,9.基金项目
国家自然科学基金资助项目(52174169) （52174169）
河南省杰出青年基金资助项目(232300421015) （232300421015）
河南省高校科技创新团队资助项目(24IRTSTHN018) （24IRTSTHN018）
