Construction Survey And Penetration Accuracy Analysis Of North Ditch Tailings Pond

The tailings pond flood discharge system is an important part in the construction of tailings pond.The related statistics show that the insufficient discharge capacity of the tailings pond drainage system or the failure of flood discharge is the main cause of the safety accident of tailings pond,and the measurement work is the foundation of the construction of flood discharge engineering.This paper mainly analyzes the application of space positioning technology GPS in the plane control network of laying engineering construction.The influence of the plane control on the transversal accuracy of the perforation surface of the main hole and the supporting hole;Effect of height control and vertical shaft height on vertical penetration accuracy of the piercing surface;Transformation between engineering coordinates and2000 national coordinates.The related measurement work of this project is studied from these aspects.These conclusions are as follows.1.In the aspect of plane control network of tunnel,when the transversal error is distributed,the error of the control network outside the tunnel is more important than the error of the control network inside the tunnel.2.In terms of vertical shaft height control,vertical shaft vertical line orientation and vertical steel ruler transfer elevation have two influencing factors in direction and distance.According to the error propagation law,elevation error will accumulate continuously,so in the construction of vertical shaft engineering,it will not go through the main hole after reaching the designed elevation.3.With the continuous improvement of Beidou satellite and the comprehensive implementation of the 2000 national coordinate system,the foundation of geodesy was analyzed,and a set of software suitable for the actual transformation to the 2000 national coordinate system was compiled with Visual Basic software,which can be directly used in the project.The conclusions are drawn from the study on the construction and construction of the flood discharge project of the north ditch tailings pond.In the process of tunnel construction,the application of the above conclusion can provide theoretical basis for early measurement scheme,and on the basis of ensure project completed,save the measurement to a great extent,and can realize engineering coordinate transformation tothe 2000 national coordinate system,for our country unified coordinate system has obvious practical significance.