Shigen-to-sozai, Vol.118, No.1, pp.9-16.
Simulation of Thermal Environmental Conditions
in Heading Face with Forcing Auxiliary Ventilation
- Control of thermal environmental conditions
in locally ventilated working place (1st
Report) -
Jianliang GAO1, Kenichi UCHINO2 and Masahiro INOUE3
| 1. Graduate student, Department of Earth
Resources Engineering, Kyushu University 2. Professor, Dr., Department of Earth Resources Engineering, Kyushu University 3. Associate Professor, Dr., Department of Earth Resources Engineering, Kyushu University |
| Numerous studies have been made to control
the climate conditions in underground
mines,
but most of them are concentrated on
a single
roadway with through airflow, and those
on
the simulation of heat problems in
developing
roadway with local ventilation are
very few.
Therefore it is necessary to establish
a
proper method to simulate the thermal
environmental
conditions within the working face
with auxiliary
ventilation for controlling the thermal
climate
there effectively. As a basic study on control of the thermal environment in working face with auxiliary ventilation, the CFD method is employed to simulate the transfer of heat and moisture between rock surface and the airflow at a heading face with forcing auxiliary ventilation. Based on the simulation results, the distribution of local heat transfer coefficient and its relationship with airflow rate, variation of heat transfer flux from the strata to the ventilation air with time and wetness fraction, the distribution of rock temperature and its variation with time elapse are discussed in the paper. The study provides an important basis for establishing a proper method to predict the thermal environment conditions on locally ventilated working places. |
| KEY WORDS: Heat Transfer, Heat-transfer Coefficient, Mass Transfer, Wetness Fraction, Working Face, Work place |