矿山功能充填采热结构传热规律及其相变行为  

Study on the heat transfer law and phase change behavior of geothermal exploitation structure by the functional backfilling mining method

作　　者：刘恒凤 王九红 翟勃 周楠[1] 李百宜[4] 高峰[4] 史振 马丹 LIU Hengfeng;WANG Jiuhong;ZHAI Bo;ZHOU Nan;LI Baiyi;GAO Feng;SHI Zhen;MA Dan(School of Mines,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China;Shandong Energy Group Xibei Mining Co Ltd,Xi'an,Shaanxi 710018,China;Yankuang Energy Group Co Ltd,Zoucheng,Shandong 273500;State Key Laboratory of Intelligent Construction and Healthy Operation and Maintenance of Deep Underground Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)

机构地区：[1]中国矿业大学矿业工程学院,江苏徐州221116 [2]山东能源集团西北矿业有限公司,陕西西安710018 [3]兖矿能源集团股份有限公司,山东邹城273500 [4]中国矿业大学深地工程智能建造与健康运维全国重点实验室,江苏徐州221116

出　　处：《采矿与安全工程学报》2025年第1期28-39,共12页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金青年科学基金项目(52404154);国家资助博士后研究人员计划项目(GZC20233012);新疆煤炭资源绿色开采教育部重点实验室开放课题(KLXGY-KB2412);山东能源科技计划重大项目(SNKJ2022A15)。

摘　　要：相变充填体大体积和高蓄热密度特性为矿山低品位热能的高效开发提供了新思路,研究采热结构传热规律及其相变行为是实现矿山地热能高效开发的重要基础。采用自主研制的矿山相变蓄热功能充填采热结构传热试验系统,开展采热结构传热试验及数值模拟,揭示了矿山功能充填采热结构相变蓄热机理。研究表明:岩层初始温度、采热流速和采热周期的增加及采热温度的降低有助于提高采热量;岩层初始温度直接决定相变充填体是否发生相态变化,采热流速越大、采热周期越长、采热温度越低则有越多的相变充填体凝固放热;相变充填体的存在会维持传热通道路径及传热热量大小,而不同因素则会影响采热结构发生相态转变的时机、改变传热通道路径。研究成果丰富了矿山功能充填采热结构传热特性研究,为矿山低品位地热能的高效开发提供了试验基础。The large volume and high heat storage density of phase change backfilling material provides a new idea for the efficient exploitation of low-grade geothermal energy in mines.Studying the heat transfer law and phase change behavior of geothermal exploitation structure(GES)is an important basis for realizing the efficient exploitation of geothermal energy in mines.First,a heat transfer experimental system of GES incorporating phase change backfilling material was independently developed.With this experimental system,the heat transfer experiment and numerical simulation were carried out,and the mechanism of phase change heat storage of GES incorporating phase change backfilling material in mines was revealed.The following beneficial results were obtained.Increases in the initial temperature of rock strata,the flow rate of exploited geothermal energy,and the geothermal exploitation cycle,as well as a decrease in geo-thermal exploitation temperature are conducive to promoting the geothermal exploitation yield.The initial temperature of rock strata directly determines whether the phase change backfilling material experiences changes in phase state.In the cases of a higher flow rate of exploited geothermal energy,a longer geothermal exploitation cycle,and a lower geothermal exploitation temperature,more phase change backfilling material would solidify and release heat.The existence of phase change backfilling material will maintain the path of heat transfer channels and the amount of heat transfer,while different factors will affect the timing of phase change of GES and alter the path of heat transfer channels.This paper enriches the research on the heat transfer characteristics of functional backfilling GES in mines,and provides an experimental basis for the efficient development of low-grade geothermal energy in mines.

关 键 词：矿山地热 功能充填 采热结构 相变传热 煤-热协同开采 

分 类 号：TD353[矿业工程—矿井建设]