Research On The Method And Precision Of Control Surveying In Coal Mine

With the fast development of national economy，the demand for the coal recourses is onthe increase each year in our country； but with the frequent accident of mine， the safetyof coal recourses mining process has attracted more and more attention. Measurement processof the underground mining not only has a special working condition， but also vulnerable tothe production and construction， and the reliability of measurement is directly related to theeconomic benefits and safety mining；therefore，analyzing on the precision control methodsof well control survey can improve the precision of measurement results to ensure the safemining. This paper mainly studies from the aspect of improving the quality of minemeasurement results， and systematically discusses the measures to ensure the measurementprecision.By analyzing the relationship between choice of the central meridian and projectionplane and the coordinate deformation， the writer expounds how to establish a reasonablemining independent coordinate system and under the requirements to facilitate exchange andverification， how to achieve a transformation between mining area independent coordinatesystem and national coordinate system. Generally， on the ground control survey， givenpoints as starting points in some countries or areas coordinate system needed to be surveyed，but the compatibility of these starting points will influence precision of the whole network.Thus， the compatibility of these given points should be analyzed and then retain the pointswhich has good compatibility in order to improve precision of the whole control network.The underground traverses control as the important part of mining survey whose methodand data quality is vital to the mine production， especially in the through engineer. Thispaper makes a quantitative analysis of error of the open traverse，direction-annexed traverseand connecting traverse. It influences on the traverse survey precision made by undergroundtraverse gyroscopic directed edge， and does a detailed study on the quantity and location of gyroscopic directed edge， which helps to clear the design and method of gyroscopic directededge and provides a good idea for underground traverse，especially，traverse net gyroscopicdirected edge.Mining surveying work is restricted by the environment； basically， it measures opentraverse firstly and forms closed or connecting traverse after finishing through engineer，theneventually forming traverse network. This paper does a lot of researches in the dataprocessing of underground traverse network. It analyzes the differences between sequentialadjustment and whole net adjustment， which helps explore the problems and disadvantagesof sequential adjustment and clearly proposes that the whole net adjustment of undergroundtraverse network can greatly improve the precision of traverse survey and enhance thereliability of results.