Aimed at the shortcomings of connecting traverse accuracy calculation formula in using,this paper, using adjustment of condition equations method, gives out a group of strict formula, which can be applied to arbitrarily shape connecting traverse error calculation.

Since open pit has the characters of especial environment and fluid and frequent operations,the resection measurement and connecting traverse becomes a suitable and efficient surveying method to the open pit mining operation.

In this article,a formula of the mean square error of azimuthis derived from any sides of the connecting traverse based on the condition adjustment theory.

To compute the annexed leveling, I designed a EXCEL table.

The thesis mainly discusses the meaning and origin of the characteristic of addition in the labor contract and analyzes the rationality and abuse of its existence so as to study the deep-seated essence of the labor contract and gives its solution to the situation in China now.