Study On Safety Assessment Model And Software Development In Controlled Blasting Of Tube-shaped Structure

With the rapid development of national development and construction, engineering blasting has became an important technique that it is used widely in engineering field. Particularly in reconstruction projects of urban and mining, controlled blasting method has been widely used. But these structures are located in the places with mored actived staff near the water, electricity and pipe network where surrounding buildings are a higher concentration,and tube-shaped structures'controlled blasting is a high-risk construction method, if the blasting design is strictly uncontrolled, neglected or misoperated or blasting workers is in the improper operation and management is not strict,blasting harm is caused easily. It will lead severe damage of the state property and people's lives.So the safety assessment of tube-shaped tructures controlled blasting is always important issue which is paid close attention by blasting workers.Above all, it is the tube-shaped structures'controlled blasting program selection, blasting design determination, blasting safety test calculation and blasting engineering step that is introduced in this paper; Then hole layout and drilling, directional window treatment and pretreatment are hazard identificationed by the Preliminary Hazard Analysis, the hazard and harm factor level chart was founded for blasting accidents, uncontrolled blasting, blasting public harm in hole layout and drilling, directional window treatment, pretreatment and blasting stage by Analytic Hierarchy Process , and their cause is analyzed deeply by the Fault Tree Analysis, Event Tree Analysis and Fishbone Diagram Analysis method; On this basis,the tube-shaped structures'controlled blasting safety assessment index system is proposed, and its safety assessment model in the light of fuzzy comprehensive assessment is established too; at last, the tube-shaped structures'controlled blasting safety review software and safety assessment software based on fuzzy comprehensive assessment are developed by Microsoft's Visual Basic 6.0 and Access 97, and the two developed software are successfully applied to controlled blasting demolition of chimneys of the Construction Mterial Factory of XiangTan YueTang.The establishment of tube-shaped structure controlled blasting safety assessment modle and development of related softwares can provide a fast,efficient way to review and assess tube-shaped structures'blasting project safety.It has some theoretical significance to the study of controlled blasting safety assessment, and push the rapid development of blasting engineering business fastly and healthyly too.