升温速率对热压型煤微结构演化规律及力学、渗流特性的影响  

Effect of heating rate on microstructure evolution and mechanicalseepage characteristics of hot-pressed briquettes

作　　者：甘青青 许江[2] 蔡果良 雷历豪 袁佳敏 彭守建[2] GAN Qingqing;XU Jiang;CAI Guoliang;LEI Lihao;YUAN Jiamin;PENG Shoujian(School of Emergency Management and Safety Engineering,Jiangxi University of Science and Technology,Ganzhou Jiangxi 341000,China;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China;State Key Laboratory of the Gas Disaster Detecting Preventing and Emergency,Chongqing Research Institute,China Coal Technology Engineering Group,Chongqing 400037,China)

机构地区：[1]江西理工大学应急管理与安全工程学院,江西赣州341000 [2]重庆大学煤矿灾害动力学与控制国家重点实验室,重庆400044 [3]中煤科工集团重庆研究院有限公司瓦斯灾害监控与应急技术国家重点实验室,重庆400037

出　　处：《矿业科学学报》2024年第5期786-796,共11页Journal of Mining Science and Technology

基　　金：国家自然科学基金(52074047)。

摘　　要：煤矿瓦斯灾害物理模拟实验中,型煤材料制作方法是影响其强度和渗透率的关键因素。引入Horsfield致密堆积理论优化型煤材料的配比,对不同升温速率下热压型煤的力学-渗流特性开展研究,并考察不同升温速率对其分子结构和孔隙结构影响。结果表明:随着升温速率的增加,热压型煤的C1s元素占比、分子结构官能团中醇、醚基(C—O/C—OH)和芳香烃、脂肪碳(C—C/C—H)含量呈先增后减再增规律;单轴抗压强度呈先增大后减小规律,而初始渗透率呈先减小后增大的趋势;最优升温速率为5℃/min。研究成果对提高型煤与原煤的相似性具有指导意义。Briquette production method is vital to improving its strength and permeability in physical simulation test of coal mine gas disasters.This study adopts the Horsfield dense packing theory to optimize the ratio of briquette materials and investigates the mechanical-seepage characteristics,molecular and pore structure of hot-pressed briquettes under different heating rates.Results show that as the heating rate increases,the proportion of C1s elements and the contents of alcohol,C—O/C—OH,aromatic hydrocarbons and C—C/C—H in functional groups in the molecular structure of hot-pressed briquettes show a fluctuating pattern of initial increase,subsequent decrease and final increase;the uniaxial compressive strength first increases and then decreases,while the initial permeability first decreases and then increases.The optimum heating rate is 5℃/min.This study offers references to improving the similarity between briquette and raw coal.

关 键 词：煤矿瓦斯灾害 微结构 热压型煤 升温速率 单轴抗压强度 渗透率 

分 类 号：TD713[矿业工程—矿井通风与安全]