采煤巷道下方岩层注水风流降温效应数值模拟

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中图分类号：TD727 文献标志码：A 文章编号：1672-9315（2025）04-0744-12

DOI：10. 13800/j. cnki. xakjdxxb.2025.0411

Numerical simulation of strata water injection and cooling effect under coal mining roadway

ZHANG Xiaoyan1， LI Linchuan²，LIU Lang1， WANG Xuan1，LI Xingge² （1.CollegeofEnergyandMining Engineering，Xi’an UniversityofSienceandTechnology，Xi’an7Oo54，China; 2.Colege ofArchitectureandCivil Engineeing，Xi’anUniversityofScienceand Technology，Xi’an71054，China）

Abstract： In order to explore the impact of water injection into the strata under coal mining roadways on the cooling of airflow，a multi-physics coupling model for strata water injection and airflow cooling wasestablished using three-dimensional finite element numerical simulation，and theeffects ofdifferent injection-production channel layouts and water injection parameters on the temperature of the airflow in the roadway and the temperature changes in the surrounding rock mass were investigated.The cooling effects of different water-injection durations under the same conditions were compared.The results show that regarding the vertical distance of water injection channels，the closer the channel is to the roadway，the faster the cooling effect reaches the surrounding rock，when the vertical distance increases from 15m to 25m ，the airflow temperature drop at the end of No.1 roadway decreases from 25.24 C to 24. 85 C . Plan 2 has the best cooling efect on the right side air flow in the roadway， with the average airflow temperature dropping to around 28∘C after 10a of water injection.When the water injection flow rate increases from 5kg/s to 15kg/s ，thereisa 1.37∘C difference in the roadway-end airflow temperature.When the water injection temperature rises from 15°C to 25°C ，this difference is 2.08∘C. As water injection time increases，the low temperature area on the air intake side of the roadway extends toward the return-air side along the air flow，the temperature drop mainly occurs in the early stage of water injection， with the temperature drop within 2 a of water injection accounting for about 90% of the total drop.The research findings provide a theoretical reference for strata water injection and airflow cooling in mines.

Key words： mine heat damage; roadway cooling; numerical simulation; rock temperature; strata water injection

0 引言

随着中国矿井开采活动逐步深入地下，煤炭开采的平均深度每年递增 10～20m ，当前已有超过50个千米级深井，其中最大开采深度已达1500m[1-2] 。（剩余18039字）