Radon Migration Through the Strata Overlying Subsurface Coal Heating --a Mathematical Model

摘要：

　　As one of a few promising methods to locate subsurface coal heating, the radon technique has been applied in underground coal mines in China and Australia, and it can be potentially used to locate coal combustion fronts in underground coal gasification operations.However, the current radon technique cannot quantitatively define the exact intensity of heating because the migration mechanisms of radon in the strata during subsurface coal heating are still not completely clear due to complexity of multiple and competing processes of radon movement in the strata.An attempt has been made in this study to formulate a mathematical model for the radon migration by considering the main processes and mechanisms of the radon migration.These include gas diffusion process, gas advection process, the geogas microbubble transport mechanism, the effect of heat generated by subsurface coal heating on the radon movement or thermal convection model, and the laboratory-observed temperature dependence of radon concentration in coal.The mathematical model given in this paper is quite simplistic but nevertheless it can potentially describe the radon migration in the strata overlying subsurface coal heating.A general solution to the mathematical model is also derived with certain initial and boundary conditions.

关键词： radon migration subsurface coal heating mathematical model

作者: WANG Junfeng XUE Sheng LI Yaobin

作者单位: College of Mining Technology, Taiyuan University of Technology, Taiyuan 030024,Shanxi, China School of Mining and Safety Engineering, Anhui University of Science & Technology, Huainan232001, An School of Mining and Safety Engineering, Anhui University of Science & Technology, Huainan232001, An

会议类型: 国际会议

会议名称: The 2016 International Symposium on Safety Science and Technology(2016安全科学与技术国际会议)

会议地点: 昆明

会议语种:英文

页码: 214-220

在线出版日期: 2016-10-17（万方平台首次上网日期，不代表论文的发表时间）