The Study Of Plane Coordinates System Establishing Method In Mine Survey

With the rapid development of national economy,the demand for resources such as coal in our country is also increasing.However,more and more mine disasters occurring frequently gives us a wake-up call.Therefore,the requirements for the accurate establishment of the plane datum in the process of coal mining are also increasing.The precision of the results in the underground mining process of connection survey and underground horizontal control survey is directly related to mine safety and economic benefits.So,in this paper,mainly from the perspective of mine surveying,the precision of mining connection survey and its internal calculation and the precision of underground adding gryo edges horizontal control network adjustment were analyzed as below:For process of mining connection survey of the one-shaft orientation,two-shaft orientation and the tanverse survey of one-shaft measured using a gyro orientation were described in detail.Then,based on Matlab software and AutoCAD software,a algorithm based on indirect adjustment of one-shaft orientation,two-shaft orientation and the tanverse survey of one-shaft measured using a gyro orientation internal solution were realized.Optimize the internal solution method of Mine Survey.Finally,using the simulation data to verify,the purpose of improving precision and the efficiency of internal solution were realized.Finally,according to the implementation of the new algorithm calculating in the industry,in Visual Studio 2015 platform using C#language developed mine directional system software.A lot of research work of survey data about underground horizontal control network in this paper had been done.First of all,a strict adjustment model of peg-top azimuths as observation were deduced in detail and its formula to evaluate the precision was gaven.Then,through the adjustment of the emulational three groups of different direction straight connecting traverses.Analysis of traverse data processing results that,adding gyro edges can make its positional accuracy improving.The experience weighting method for the integrated accuracy of single connecting traverse adjustment was the highest of all.Therefore,for the stochastic model of a single single connecting traverse added gyro-edge,experience weighting is preferred.For data processing of the closed traverse with same simulation observation data but different redundant observations,found that no repetition of the points in the closed traverse,in the 100 groups of simulation data,the iterative convergence times was only 12.And 88 groups had negative variance in Helmert weighting method with a low precision.However,when points to be determined were all repetitive and partial repetitive,the iterative convergence times were 84 and 83,in addition,its comprehensive accuracy in several models of weighting method was highest.To sum up,this paper hold that when the number of redundant observations was enough,using Helmert weighting determination can get more reliable adjustment results.Finally,through the data processing in Jingdong Coal Industry,compared with the accuracy of different weighting methods,the superiority of Helmert variance component estimation was verified when the number of redundant observations was enough.