(1.西安科技大学 地质与环境学院,陕西 西安 710054; 2.陕西省煤炭绿色开发地质保障重点实验室,陕西 西安 710054; 3.中煤能源研究院有限责任公司,陕西 西安 710054; 4.陕煤集团神木张家峁矿业有限公司,陕西 榆林 719316)

风化基岩; Bayes判别; 富水性; 张家峁井田

Application of Bayes discriminant model in prediction of water enrichment of weathered bedrock
HOU En-ke1,2,YAN Xin1,3,ZHENG Yong-fei4,YANG Fan4

(1.College of Geology and Environment,Xi'an University of Science and Technology,Xi'an 710054,China; 2.Shaanxi Provincial Key Laboratory of Geological Support for Coal Green Exploitation,Xi'an 710054,China; 3.China Coal Energy Research Institute Co.,Ltd.,Xi'an 710054,China; 4.Shenmu Zhangjiamao Mining Co.,Ltd.,Shaanxi Coal and Chemical Industry Group,Yulin 719316,China)

weathered bedrock; Bayes discrimination; water enrichment; Zhangjiamao coal mine



Weathered bedrock aquifer is one of the main aquifers that pose a threat to the safety of mine production.Accurate prediction of water enrichment is the basis of water disaster prevention and control coal mine.Aiming at the prediction of water enrichment of weathered bedrock,the Bayes discriminant model of weathered bedrock aquifer has been established with Zhangjiamao coal mine field area,to predict the water enrichment characteristics of weathered bedrock areas.In that process,a comprehensive analysis of the lithologic characteristics,distribution characteristics and water enrichment characteristics of weathered bedrock,thickness was made,and the thickness and weathered degree as well as lithology combination index,the ratio of thickness of brittle rock to plastic rock,topography and landform were chosen as discriminant indicators,taking the data of weathered bedrock from 29 group of pumping tests in the study area and its periphery as training and testing examples.Then,the model of water enrichmet of weathered bedrock aquifer based on Bayes discriminant has been built.The water enrichment type of weathered bedrock in drilling areas without pumping test data can be predicted.The result shows that the overall water enrichment of weathered bedrock in well field is weak and the spatial distribution is uneven.In the middle and northwest corner,the local area is strongly rich in water and the middle part moderately; the eastern and northeastern regions are very weak in water,and so are the rest parts are weak enrichment.A comparison the observed data of underground water inflow in the process of mine production shows that the established discriminant model is high in accuracy,indicating that it is feasible to use this model to predict the water enrichment of weathered bedrock aquifer.It provides a new method for predicting the water enrichment of weathered bedrock aquifer.