The Safety Assessment Of Fault During The Underwater Hole Blasting Construct

In recent years, the underwater hole blasting more and more shows the unexampled predominance in the channel dredging, the canal excavating, the port, the dykes and dams building projects, which is the primary cause of the fast development in ocean engineering of America and Europe. However, in the under water hole blasting project, because of such complicated construction environment as the tide, the wave, the current, the hydrology, the geological topography, etc. the degree of difficulty of construction has very great differences more than the land, the uncertainty happening of the fault is more than the land too and the safety management seems particularly important too. In addition, "safe blasting" has become the developing direction and new subject of blasting engineer in the new century. "Safety first, Prevention primary" is a policy of the safety production in our country. Safe is the important prerequisite in all blasting engineer, science and overall security assessment is the important means to accomplish it.The Yangshan harbor rock reef project of the Shanghai International Shipping Centre Yangshan deep water harbor is big, the time limit for a project is longer, requests high, the construction environment is complex. In this paper, the potential hazard which may result in fault during the whole construct of auto-uprising flat in underwater hole blasting will be analyzed systemically and establishing the fuzzy comprehensive assessment model. Hazards that probably happen in per phase construct are distinguished, which from localization, drilling, charging, wiring to the flat last moving out. The overall potential hazard is divided into four aspect and analyzed systematically such as technical design, construction site, supervise management and objective condition, and using cause and effect analysis chart and analytical process combining the determine nature and ration. The hierarchy important degree of cause and effect analysis chart is built by the calculate data, which can make the feasible precautionary measures to per hierarchy influence factor conveniently.Based on the AHP-Fuzzy safety comprehensive appraisal theory, fullyconsidered the characteristic of the project and chose the rational fuzzy comprehensive operator, the potential hazard which may result in fault during the whole construct in underwater hole blasting will be appraised. By the judge matrix confirmed by scientific, objective and reasonable marks given by the expert, and combining the relative weights of safety assessment gained, through fuzzy comprehensive evaluation, the real safety grade of this project is drawn.Originally in the article, the comprehensive application of the cause and effect analysis and analytic hierarchy process, and AHP-Fuzzy combining with hierarchy analysis and fuzzy comprehensive appraisal, can fully reflected comprehensive appraisal are fuzzy, it is a kind of very good comprehensive analytical method. Perfected in the future, it can be popularized to the other fields' application.