矿山测量

2015, No.178(04) 5

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<正>Application of Analytical Method in Error Prediction of Horizontal Important Direction Underground Tunnel Through Measurement—In error prediction of underground tunnel through measurement,the graphic method was used to measure interrelated parameter values(Rx,Ry,Lx,Ly,lcos2α,and lsin2α)of the horizontal important direction underground tunnel through,then position error of tunnel through meeting point was obtained in

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