摘要
针对传统隔热材料在治理深部矿井高温热害问题时存在的强度低和支护效果差等缺陷,采用改性陶粒和纤维提升隔热混凝土材料强度,并基于功能梯度理论优化混凝土结构形式,构建功能梯度隔热支护结构,结合工程实际开展相似模型试验和数值模拟,分析隔热支护效果。研究结果表明:构建的“支护层+隔热层”功能梯度结构,可有效控制围岩变形和阻隔围岩散热,相比普通混凝土结构,围岩散热减少量提升了28.74%;随着隔热层厚度的增加,围岩调热圈半径缩小,当隔热层厚度为50 mm时达到阈值,围岩散热减小量提升了30.26%,与模型试验结果一致;隔热支护结构下,围岩应力状态和巷道塑性区形态较普通混凝土结构均无明显变化,仍为类圆形塑性区,支护效果良好;通过功效系数法综合分析围岩散热、围岩应力及巷道变形情况,确定支护层厚度为50 mm、隔热层厚度为50 mm时隔热支护综合效果最佳。
To address the challenge of high-temperature thermal hazards in deep mining operations,traditional thermal insulation support materials often suffer from limitations such as inadequate strength and poor durability.To improve and optimize the performance of thermal insulation support structures,modified ceramic particles and fibers were incorporated into the development of thermal insulation concrete materials.Utilizing the principles of functional gradient theory,the concrete structure was optimized,resulting in the construction of a functional gradient thermal insulation support structure.A corresponding model test system was established,integrating engineering practices to facilitate a comparative analysis of the thermal insulation effects between the newly developed thermal insulation support structure and conventional concrete structures.Through numerical simulation analysis,the impact of various parameters of the thermal insulation support structure on the thermal insulation efficacy of the surrounding rock in the roadway was examined,leading to the determination of optimal design parameters for the functional gradient thermal insulation support structure.The findings indicate that the engineered“support layer+thermal insulation layer”functional gradient structure successfully transitions from a high elastic modulus and high thermal conductivity at the surrounding rock interface to a low elastic modulus and low thermal conductivity at the roadway interface.This configuration effectively mitigates the deformation of surrounding rocks and reduces heat dissipation.In the model test,the application of the thermal insulation support structure resulted in a 28.74%reduction in heat dissipation from the surrounding rocks compared to a conventional concrete structure.As the thickness of the thermal insulation layer increased,the radius of the thermal adjustment zone in the surrounding rocks decreased,and the deformation of the roadway initially decreased before subsequently increasing.Additionally,a decrease in ventilation temperature further reduced the extent of the thermal adjustment zone.A comprehensive analysis of heat dissipation and deformation in the surrounding rocks,conducted using the efficacy coefficient method,it was determined that the optimal thermal insulation effect was achieved when the thickness of the support layer was 50 mm and the thickness of the thermal insulation layer was 50 mm.
作者
张建俊
孙源骏
郭良银
孙闯
费鸿禄
金淳哲
王猛
周琳力
ZHANG Jianjun;SUN Yuanjun;GUO Liangyin;SUN Chuang;FEI Honglu;JIN Chunzhe;WANG Meng;ZHOU Linli(Erdos Research Institute,Liaoning Technical University,Erdos 017000,Inner Mongolia,China;College of Civil Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China;Xincheng Gold Mine,Shandong Gold Mining Co.,Ltd.,Laizhou 261438,Shandong,China;Blasting Technology Research Institute,Liaoning Technical University,Fuxin 123000,Liaoning,China)
出处
《黄金科学技术》
北大核心
2025年第4期789-803,共15页
Gold Science and Technology
基金
辽宁省教育厅基本科研项目“煤矸石绿色稳固与资源化利用关键技术”(编号:JTZD2023077)
国家自然科学基金项目“采场悬臂岩层破断诱震机制与微震前兆信息智能判识”(编号:52404082)
辽宁省教育厅基本科研项目“高速铁路预制构件蒸养混凝土脆化效应研究”(编号:LJKMZ20220700)联合资助。
关键词
功能梯度
隔热支护结构
隔热效果
围岩温度场
模型试验
数值模拟
functional gradient
insulated support structure
insulation effect
surrounding rock temperature field
model test
numerical simulation
