A scaled test model for predicting the temperature field in a coal mine stope with a U-shaped ventilation system

作者：Wang Shu Gang; Chi Zi Hao; Zhang Teng Fei^*; Liang Yun Tao

来源：Journal of China University of Mining & Technology, 2012, 41(1): 31-36.

• Air inlet
• Experimental apparatus
• Goaf
• Heat diffusions
• Heat sources
• Heat transport
• Independent variables
• Internal heat source
• On-site measurement
• Similarity ratio
• Simulation data
• Temperature field
• Temperature peaks
• Test models
• Test rigs
• U-shaped
• Underground mining
• Ventilation systems
• Working face

A scale test rig was constructed to model heat transport within a coal mine stope. The stope temperature distribution during underground mining was predicted from the model. Dimensionless relationships αr2xr/ ur2=αr3 dnr2/ur=xr/pfr and xr/urTr=1/qr were proposed as an accurate way to reproduce temperature gradients in the stope. These relationships are based on equations describing heat diffusion. Starting from reasonable estimates of the independent variables and scaled heat source values the temperature distribution was derived. On site measurements compared to simulation data for the temperature distribution suggest agreement between the two sets of values. It is shown that the temperature declines as rising air moves along the air inlet toward the air return of the working face. The temperature peaks from 20 to 30 meters from the goaf center line on the tail gate side. The experimental apparatus does a reasonable job of reproducing the actual heat transfer in a mine stope.

• 出版日期2012