Development of site specific blasting index parameters based on single hole blast test cratering
Abstrak
An experimental method is proposed to assess blasting requirements based on in-situ cratering behavior. The method relies on single hole blast (SHB) tests to derive burden-dependent relationships. A non-linear crater model of the form [Formula: see text] is calibrated from SHB test results to describe the cratering behavior. Parameters [Formula: see text] and [Formula: see text] represent characteristic blastability index parameters that depend on geomechanical and operational conditions. A series of experimental SHB tests were conducted at three hard rock mines. The craters were mapped to capture the breakout profile and calibrate the model. Results showed that coefficient [Formula: see text] presents an inverse linear correlation with burden [Formula: see text], while exponent s is approximately constant for a considerable range of burden values. Experimental results are used to define burden dependent relationship for bench blast designs and blasthole placement in underground development rounds. A complementary analysis addresses the prevalence of multiple cratering mechanisms according to geology and burden dimension.
Penulis (3)
Jonathan D. Aubertin
Matthias Wimmer
Masoud Sedghi
Akses Cepat
- Tahun Terbit
- 2023
- Bahasa
- en
- Sumber Database
- CrossRef
- DOI
- 10.1080/25726668.2023.2219128
- Akses
- Open Access ✓