Skip to main content
Conference Proceedings

The Fourth Australasian Ground Control in Mining Conference (AusRock)

Conference Proceedings

The Fourth Australasian Ground Control in Mining Conference (AusRock)

PDF Add to cart

Proneness of competent over-stressed intact rock to violent fracturing

For most practical rock engineering purposes, stress versus strength conditions around underground openings for which rock masses fail and their various modes of failure, are reasonably well-understood and predictable. Some rock masses and particular rock types fail slowly and relatively quietly. However, others can fail rapidly, violently and maybe with the ejection of significant broken rock. In some countries and in some mines, the latter style of violent fracturing and failure of the rock mass is referred to as strain bursting'. It can be alarming and extremely hazardous to nearby miners and machines. For such situations, the design and installation of appropriate ground support, to provide a safe work place, can be challenging. At any particular mine site, it's often generally understood which local rock masses (rock types) are prone to strain bursting. Competent and strong siliceous rocks and some massive sulphides are often the main offenders. While some neighbouring, equally-competent and strong rocks might also fail, they do so more quietly and without ejection. To understand this contrast, a better understanding of the fracturing process is required other than simple and standard strength versus stress considerations.
Suites of standard intact rock properties from numerous Australian mines have been used to define and help understand different high-stress failure styles for component intact rock; especially those prone to violent fracturing (strain bursting). Simple considerations of micro-fracturing (defects in the intact material), plus the available energy at failure versus the energy consumed during fracturing, distinguishes between over-stressed and competent rock types that fracture violently and those that don't. CITATION:Lee, M F, Penney, A and Sainsbury, B L, 2018. Proneness of competent over-stressed intact rock to violent fracturing, in
Proceedings The Fourth Australasian Ground Control in Mining Conference (AusRock), pp 170-184 (The Australasian Institute of Mining and Metallurgy: Melbourne).
Return to parent product
  • Proneness of competent over-stressed intact rock to violent fracturing
    PDF
    This product is exclusive to Digital library subscription
  • Proneness of competent over-stressed intact rock to violent fracturing
    PDF
    Normal price $22.00
    Member price from $0.00
    Add to cart

    Fees above are GST inclusive

PD Hours
Approved activity
  • Published: 2018
  • PDF Size: 1.752 Mb.
  • Unique ID: P201805017

Our site uses cookies

We use these to improve your browser experience. By continuing to use the website you agree to the use of cookies.