The Study Of Controlling Blasting Of The Roadbed Extension And High Location Side-slope Cutting

With increasing day after day of high grade highway in moutain ridge district,the requriement of roadbed stonework blowing up is improving continuously. How to ensure the project implement safely and effectively,esp in the complicated condition of geology, the terrain and its features, is the key to restrict the project finishing successfully;In this paper , the theoretic analyse and pratical study based on the extension of 309 country road (from Wuan to Shexian in Hebei Province),adopt the method of theoretical analyse,caculater and experiment,improve the controlling blasting skill and construction crafr of roadbed stonework,control the blasting harm effectively,accomplish the construction quickly and safely in normal conditions.The paper puts forward to the relative parameter applying to roadbed extension in beforecrack blasting,and raises the combination of beforecrack demolition and buffer demolition,which is the main way to conctrol the side-slope stable and taking shape.Putting to use the achievement produces great social benifet and economic benefitjt has widely practical future.