Improved chaos-genetic algorithm optimization method on back analysis of earth temperature field in coal mine

Aiming at complexity of hydrogeological conditions of coal mine, this paper brought forward the improved chaos-genetic optimization method based on the chaos optimization method and genetic algorithm method. Using the optimization method, this paper have carried out the back analysis of earth temperature field of coal mine, then predicted the earth temperature field using the parameters of the back analysis, which provided a scientific basis for control of heat-harm. Through engineering example, the result showed that the improved chaos and genetic optimization method on the back analysis of earth temperature field in coal mine was feasible.