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Rock Mechanics and Rock Engineering

, Volume 44, Issue 4, pp 483–490 | Cite as

Modelling Rock Blasting Considering Explosion Gas Penetration Using Discontinuous Deformation Analysis

  • Youjun Ning
  • Jun Yang
  • Guowei Ma
  • Pengwan Chen
Technical Note

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.

Keywords

Bench rock blasting Rock mass fracturing Explosion gas pressure Numerical modelling Discontinuous deformation analysis 

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Youjun Ning
    • 1
    • 2
  • Jun Yang
    • 2
  • Guowei Ma
    • 1
    • 3
  • Pengwan Chen
    • 2
  1. 1.School of Civil and Environmental EngineeringNanyang Technological UniversitySingaporeSingapore
  2. 2.State Key Laboratory of Explosion Science and TechnologyBeijing Institute of TechnologyBeijingChina
  3. 3.School of Civil and Resource EngineeringUniversity of Western AustraliaCrawleyAustralia

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