滇东上二叠统煤层煤岩特征及其对瓦斯涌出量的控制

基于滇东上二叠统赋煤区煤层的煤岩学特征、瓦斯含量、瓦斯涌出量及煤矿瓦斯事故统计分析，对研究区煤层的煤岩组成、煤体结构、煤炭筛分试验成果、煤层瓦斯含量和煤矿瓦斯涌出量进行了比对研究。研究表明:煤变质程度、显微煤岩组分、筛分粒级煤及煤的孔隙率等煤岩学特征控制了瓦斯的分布特征，并造成煤矿瓦斯涌出呈现区域性的差异；滇东上二叠统赋煤区瓦斯涌出类型可分为低煤阶均匀涌出型、中煤阶均匀涌出型、中煤阶非均匀突出型、高煤阶均匀涌出型和高煤阶非均匀突出型，且以中煤阶均匀涌出型为主。 

Petrological characteristics of coal and their control on gas emission of Upper Permian in eastern Yunnan

Based on petrological characteristics of the Upper Permian coal in eastern Yunnan and the statistic analysis of gas content, gas emission and coal mine gas accidents, this paper conducted comparative research on petrographic composition, coal structure, coal screening test results, gas content of each coal seam and gas emission. The results show that petrological characteristics of coal, such as metamorphism degree, coal maceral, size fraction and porosity have determined gas accumulation and resulted in the regional differences of the gas emission. The emission category of Upper Permian in eastern Yunnan can be divided into several types:uniform emission of low rank coal, uniform emission of middle rank coal, non-uniform bursting of middle rank coal, uniform emission and non-uniform bursting of high rank coal. The uniform emission of middle rank coal is dominant.