摘要
基于相似理论,应用方程分析法推导出矿井热害治理协同地热开采相似模拟所需满足的相似准则,得出缩尺模型与原模型之间各参数相似比尺。利用COMSOL数值软件建立2种尺寸模型分别求解,验证建立的相似准则准确性。按1:100的几何缩尺比例搭建相似模拟实验系统,该系统包括巷道通风系统、地热开采系统和监测系统,用于研究矿井岩层地热开采过程中采热流体流动传热规律以及地热开采对通风巷道热环境的作用机制。研究结果表明:岩层注水采热过程中逐渐降低巷道围岩温度,减小巷道内风流升温幅度。当岩层注水54 min时,巷道内风流升温幅度比不注水时降低1.5℃。采热井负压抽水采热促进岩层内热传递,使岩层降温区域加速扩大。注入井注水采热对巷道风流温度的影响可以分为通风换热、围岩快速冷却、风流温度稳定3个阶段。
Based on the similarity theory,the similarity criteria for the simulation experiment of synergetic mining of geothermal energy to heat hazard control were deduced by using the equation analysis method,and the similar scale of parameters between the full-scale model and the reduced-scale model was obtained.Two dimensional geometric models were established and solved using numerical software COMSOL,and the results verified the correctness of the similarity criterion.According to 1꞉100 geometric scale,a simulation experiment system was designed,which includes ventilation system of roadway,geothermal mining system and monitoring system.The law of flow and heat transfer of heat extraction medium during the mining of geothermal energy and how it affects the thermal environment of ventilation roadway were revealed by this system.The results show that the temperature of surrounding rock is reduced gradually during the water injection and heat recovery in rock stratum,which reduces the magnitude of airflow temperature rise in the roadway.In the case of 54 min of water injection,the temperature rise of airflow in the roadway is 1.5℃less than that without water injection.The heat water extraction in the production well can promote the heat transfer in the rock layer and the expansion of the cooling zone in the rock stratum.The influence of water injection and heat recovery on airflow temperature of roadway can be divided into three phases,i.e.,ventilation and heat exchange,rapid cooling of surrounding rock steady of air temperature.
作者
徐宇
李孜军
王君健
陈寅
刘华森
潘伟
贾敏涛
XU Yu;LI Zijun;WANG Junjian;CHEN Yin;LIU Huasen;PAN Wei;JIA Mintao(School of Resources and Safety Engineering,Central South University,Changsha 410083,China;State Key Laboratory of Safety and Health for Metal Mines,Maanshan 243000,China;Xinjiang Kalatongke Mining Co.Ltd.,Altai 836500,China)
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2023年第6期2162-2173,共12页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(52274247)
湖南省自然科学基金资助项目(2022JJ30050)
金属矿山安全与健康国家重点实验室开放基金资助项目(2022-JSKSSYS-03)
长沙市自然科学基金资助项目(kq2202073)。
关键词
矿井通风
热害治理
矿井地热
深部开采
相似模拟
mine ventilation
heat hazard control
mine geothermal energy
deep mine
similar simulation
