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Application of Measuring Distance Method by Height Difference Between Meters in Forecast of Sinking at Mined out Area

Lu Qingguo(Gold Institute of North Eastern University) Li Qingguo Zhang Wei(Baizhangzi Gold Mine of Liaoning Province)  
In the case of mountainous region into that persons can not enter,a measuring distance method by height difference between meters in forecast of sinking at the mined out area is put forword,which had been used in observation of surface sinking to day.This method have advantages of simple and reliable.The measures to raise by accuracy of measuring distance are to use high accuracy measuring meters,accurately measuring height difference between meters,treating data by computer,and as increasing in height difference between two measuring points as possible.
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