ENGLISH ABSTRACTS OF MAIN ARTICLES IN THIS ISSUE

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

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, lcos2ct, and lsin2a） of the horizontal important direction underground tunnel through, then position error of tunnel through meeting point was obtained in horizontal important direction. There are two problems using this approach to get parameter values： one was the tedious measure work, a^other was difficult. For the above reasons, in the paper,