采煤巷道下方巖層注水風(fēng)流降溫效應(yīng)數(shù)值模擬

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中圖分類號(hào)：TD727 文獻(xiàn)標(biāo)志碼：A 文章編號(hào)：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

隨著中國(guó)礦井開(kāi)采活動(dòng)逐步深入地下，煤炭開(kāi)采的平均深度每年遞增 10～20m ，當(dāng)前已有超過(guò)50個(gè)千米級(jí)深井，其中最大開(kāi)采深度已達(dá)1500m[1-2] 。（剩余18039字）