Modelling Rock Blasting Considering Explosion Gas Penetration Using Discontinuous Deformation Analysis

Y.J. Ning, J. Yang, Guowei Ma, P.W. Chen

    Research output: Contribution to journalArticle

    70 Citations (Scopus)

    Abstract

    Explosion gas plays an important role in rock mass fragmentation and cast in rock blasting. In this technical note, the discontinuous deformation analysis method is extended for bench rock blasting by coupling the rock mass failure process and the penetration effect of the explosion gas based on a generalized artificial joint concept to model rock mass fracturing. By tracking the blast chamber evolution dynamically, instant explosion gas pressure is derived from the blast chamber volume using a simple polytropic gas pressure equation of state and loaded on the blast chamber wall. A bench blasting example is carried out. The blast chamber volume and pressure time histories are obtained. The rock failure and movement process in bench rock blasting is reproduced and analysed.
    Original languageEnglish
    Pages (from-to)483-490
    JournalRock Mechanics and Rock Engineering
    Volume44
    Issue number4
    DOIs
    Publication statusPublished - 2011

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