Research On The Influence Of Environment Factors On The Measurement Of Soil Radon And Its Application

In recent years, with the continuous development of radioactive exploration in our country, radioactivity measurements were used more and more widely, mainly for engineering prospecting, environmental pollution, clinical medicine and earthquake prediction in many fields, the radon measurement is the widely used a method.Radon measurement is not affected by terrain, detection range, anti-electromagnetic interference, simple operation and so on many kinds of merits, but radon gas will influenced by environmental factors(temperature, pressure, temperature, pressure, humidity, etc.).Based on the national “863” plan “key technology of industrialization of underground coal gasification ”, realize underground gasification furnace combustion state monitoring" monitoring the change in radon concentration and environmental factors, the use of BP neural network and orthogonal table method to combine the analysis of the environmental factors on radon concentration sensitivity and the engineering measurement of radon concentration detection proposed point density anomaly region division method.It is concluded through the analysis and study, under different weather conditions and environmental factors of sensitivity ranking is not the same. Among them, sunny sort, maximum temperature, humidity times, atmospheric pressure again, temperature is less than the atmospheric pressure, minimum outdoor temperature; rainy day sort for maximum humidity, geothermal times, outdoor temperature again, temperature is less than the outdoor temperature, rainfall days minimum; snow sort maximum temperature, humidity times, temperature again, snow days less than temperature, outdoor temperature is less than snow days, atmospheric pressure minimum. Also on underground coal gasification zones were environmental factors of radon concentration correction, obtains the threshold T is 0.5, the point density I, delineation of the radon value abnormal areas tally with the actual situation.This experiment using BP neural network and orthogonal table combined application on sensitivity analysis of environmental factors and the radon concentration and density anomaly method in eliminating the environmental factors that affect regional radon concentration correction has achieved good effect and detection of underground fire area has certain guiding significance.