| Utilization of gas for power generation not only can save energy and reduce pollution,but also will bring about considerable economic benefits.Gas power generation has been the strong support of the relevant policies of the state,more and more large coal mine gas power plant had appeared. However, there are many mechanical equipments and large noise in coal mine gas power plant. It not only seriously affected the workers’ work and rest and harm to human health but also affected the normal life of the surrounding residents. Therefore, it is great significant to study the noise hazard of coal mine gas power plant. This paper taked A mine and B mine gas power plant of Guizhou as the research object and based on the noise data of field detection, the noise attenuation distribution and damage degree of coal mine gas power plant are studied by using the method of field noise hazard investigation and GIS software simulation. It achieved the following conclusions:(1)Based on the analysis of GIS software, the measured noise data were analyzed of A and B mine gas power plant. The results showed that this measured noise data have spatial autocorrelation in spatial random field, and it can be interpolated.(2)Taking the GIS exploratory spatial analysis as the basic analysis tool,respectively using the spline function interpolation method, inverse distance weighted interpolation and kriging interpolation method to interpolate measured noise data of A mine and B mine gas power plant. Through cross validation of interpolation model and comparison with the actual situation, it is concluded that Kriging interpolation method based on the geostatistics can perfectly predict the noise distribution of the coal mine gas power plant in this study.(3)The noise distribution contour map of the gas power plant in A mine and B mine was drawn by using the spatial analysis function of GIS, and combined with the actual situation in the field, analysis results is received about the mountainous terrain of coal mine gas power plant noise attenuation law. The results show that: the noise generated by coal mine gas power plants gradually decay in the process to spread,their decay process, in addition to that from the outside factors, was also affected by natural terrain, forest sound barriers and so on.(4)Combined with relevant noise standards and on-site noise hazards survey,noise pollution levels were graded. The noise pollution level of A mine and B mine gas power plant was visualized by using GIS platform. Through the evaluation about the damage of degree of occupational noise exposure, it was concluded that the maintenance workers and management personnel are the highest noise exposure level jobs in A mine and B mine gas power plant. The noise intensity of their contacted would cause minor occupational hazards, and the noise is easy to have a bad effect on their hearing.(5)Combining with the results of noise attenuation rule and noise damage degree evaluation of gas power plant in A mine and B mine,the targeted noise control measures were proposed according to the specific situations of gas power plant of A mine and B mine. |
