Study On Regulations Of Movement And Deformation Cause By Underriver Mining In Wangyin River Dam

With the rapid growth of China’s economy,the demand for coal resources is increasing day by day,resulting in "Coal mining under water"activities intensified."Coal mining under water" is bound to impact on the dam,to the people’s lives and property security has brought great risks.Thus,it is necessary to scientifically and reasonably predict the influence extent and scope,and provide technical support for dam repair.In this paper,the coal mining of 663 working face in Liuqiao No.1 Mine under Wangyin River dam is taken as an example,according to the geologic mining conditions and probability integral expected parameters of the working face,the probability integral prediction model is established by using VB6.0 programming language.And,according to the geological mining conditions and rock mechanics parameters of the working face,the FLAC3D prediction model is established based on the FISH programming language.The two kinds of prediction models are used to predict,analyze and study the dam movement and deformation of Wangyin River.In this paper,the predictive results of the two predictive models are compared with observation data of the Wangyin River noth dam movement observation station.The results show:Probabilistic integration and FLAC3D numerical simulation are feasible in the prediction of dam movement and deformation;Wangyin River north dam has been affected by the 633 face mining,the South dam has not been affected;In terms of the overall sinking,the probability integral prediction model is superior to the FLAC3D prediction model;In terms of horizontal movement,the predictive effect of FLAC3D prediction model is better than probabilistic integral method;The results of horizontal deformation prediction of the two predictive models show:under the influence of exploitation of 663 working face,the probability of cracks in the north dam is small.In this paper,FLAC3D numerical simulation and combined with post-processing software(Tecplot 360).From the two aspects of tensile stress and shear stress analyzes the influence of mining of 663 working face.The tensile stress analysis results show:The stress of the north dam back slope is more concentrated,the maximum tensile stress does not reach the critical value of the tensile stress of the dam has cracked,The probability of generating transverse cracks is small;The results of shear stress analysis show:Wangyin River north embakment body’s f s is greater than 0,north dam does not appear shear damage.