不同隔热材料下的深井巷道隔热降温模拟研究  

Simulation study on heat insulation and cooling of deep shaft tunnel with different heat insulation materials

作　　者：游波 崔大雄 刘何清 鲁义 杨芯宇 YOU Bo;CUI Daxiong;LIU Heqing;LU Yi;YANG Xinyu(School of Resources,Environment and Safety Engineering,Hunan University of Science and Technology,Xiangtan Hunan 411201,China)

机构地区：[1]湖南科技大学资源环境与安全工程学院,湖南湘潭411201

出　　处：《中国安全科学学报》2024年第2期153-160,共8页China Safety Science Journal

基　　金：国家自然科学基金资助(52174179);辽宁工程技术大学矿山热动力灾害与防治教育部重点实验室基金资助(JSK202204)。

摘　　要：为解决煤矿开采深度不断延伸带来的热害问题,揭示深井巷道温度场分布特征,选用5种矿用隔热材料开展深井巷道隔热降温模拟研究,分析不同厚度隔热层、不同围岩初始温度对围岩温度场、调热圈半径及巷内风流温度变化的影响,并探究隔热层附近围岩温度场的演变特征。结果表明:添加泡沫混凝土的材料隔热性能最佳,经济成本最低;隔热层选用导热系数较低的隔热材料有助于提高隔热层的隔热效果,5~10 cm为最佳隔热层厚度;温度场与围岩层、锚喷层、隔热层在空间上分布一致,隔热材料导热系数与巷道围岩的温度梯度呈负相关,隔热层厚度、原岩温度与巷道围岩温度梯度呈正相关,隔热材料、隔热层厚度和原岩温度对调热圈半径有一定程度的影响,相比无隔热层巷道,巷道隔热和降温效果显著。To solve the problem of heat damage caused by the continuous extension of coal mining depth,and to reveal the distribution characteristics of the temperature field in the deep-shaft roadway,five kinds of mining thermal insulation materials were selected to carry out the study of thermal insulation and cooling in the deep-shaft roadway,to analyze the effects of different thicknesses of the thermal insulation layer and different initial temperatures of the peripheral rock on the temperature field of the peripheral rock,the radius of the heat-regulating circle,and the temperature change of the wind flow in the roadway,and to analyze the evolution characteristics of the peripheral rock temperature field in the vicinity of the thermal insulation layer.The results show that foam heat-insulating concrete has the best heat-insulating performance and the lowest economic cost.The selection of lower thermal conductivity of the insulation layer helps to improve the thermal insulation effect of the insulation layer,and 5-10 cm is the best thickness of insulation layer,temperature field is consistent with the spatial distribution of peripheral rock layer,anchor spraying layer,and insulation layer,thermal conductivity of insulation material is negatively correlated with the tunnel peripheral rock temperature gradient,thickness of insulation layer,and temperature of the original rock are positively correlated with the tunnel peripheral rock temperature gradient,and thickness and temperature of insulation layer have a significant influence on radius of heat-regulating circle.Temperature has a certain degree of influence on radius of heat-regulating circle,compared with the roadway without a heat-insulating layer,roadway heat-insulating effect of cooling effect is significant.

关 键 词：隔热材料 巷道风流 围岩温度场 温度梯度 调热圈 降温效果 

分 类 号：X936[环境科学与工程—安全科学]