Prediction of Climatic Conditions in Developing Roadway with Forcing Auxiliary Ventilation System. Control of thermal environmental conditions in locally ventilated working place. (2nd Report).

Abstract

and Masatomo ICHINOSE 4 Finite difference method is applied to simulate the thermal environmental conditions in a developing roadway with forcing auxiliary ventilation. The local heat transfer coefficients which were obtained by simulating the heat and mass transfer process in working face with CFD method are coded into the program for the prediction of the thermal environmental conditions in working face. The 3-demensional heat conduction in surrounding strata rock, the heat and mass transfer between the airflow in the duct and roadway, the heat and mass transfer between wet rock surface and roadway air are simulated with taking into consideration the air leakage of the ventilation duct and the advance of the working face. The distribution of the air temperature and relative humidity of the air both in the duct and roadway, and their variation with time can be predicted by the program when forcing auxiliary ventilation is used. The model for the prediction of the thermal environment can provide a reliable approach to predict if a climate problem exists in the design stage, allowing suitable ameliorative measures to be tested and evaluated prior to the start of driving. It will contribute to establishing the rational method for improvement of the thermal environment, by proposing more effective technological guide in the control of heat problems in working face with auxiliary ventilation.