This method was applied to the question of linear inequality constrained adjustment,and was proved to be valid through the example.

Study on the Adit Stability Under Dynamic Blasting Load;

This paper introduces the method for directive generation of adit graphic files with the information from multiple sources acquired during tunnel construction using MAPGIS component technology.

In combination with rock permeability in dam region of a hydroelectric plant,the paper introduces a method directly evaluating rock permeability coeffieient--adit sonic wave hole seepage test and gives test device,test procedure,estimate principle and result.

In GPS control survey,as if relevant definition parameter of local independent coordination system were unknown,the constraint adjustment couldn′t adjust,and that can do nothing but can apply coordinate translation method to solve the local coordinate of unknown points;in TGO system,the point calibration is used to solve this problem.

Hereby,this paper introduced three kinds of known points\' reliability check methods,such as regression analysis,actual measurement baseline comparison and constraint adjustment method.

A study on the influence of datum points on the precision of restrained adjustment results of GPS engineering networks has been carried out on the basis of examples.