International Journal of Surface Mining Reclamation and EnvironmentRustan A (1992) Burden, spacing and bore hole diameter at rock blasting. Int J Surf Min Reclam 6:141–149Rustan PA. Burden, spacing and borehole diameter at rock blasting. In: Proceedings of the 3rd international symposium on ...
宽孔距爆破,blasting of large spacing and small burden wide-end blasting technology宽孔距爆破技术 3)pre-splitting blasting with wide pitch of holes宽孔距预裂爆破 1.At present, the pre-splitting blasting with wide pitch of holes already obtained the experiment in the domestic and foreign large-...
These characteristics have gotten a lot of attention, especially burden (B), stemming (ST), and spacing (S). Rock density (RD) has also been commonly utilized by researchers as input parameters (Nguyen et al. 2021; Tong and Ranganathan 2013; Pisner and Schnyer 2020; Zhou et al. 2020b...
burden W, hole spacing a, peripheral hole distance Z as the input factors and with the explosive cost, block rate as the output factor. The recommended parameters were W = 0. 8 m, a = 1 m, Z = 0. 8 m, and the explosive specific charge was 0. 2001 kg/t, only 50% of the ...
The influence from specific charge, geometric scale and physical properties of homogenous rock on fragmentation A Rustan 被引量: 17发表: 1983年 Burden related to blasthole diameter in rock blasting Since the 1950s, most of the empirical formulas in rock blasting have incorporated a linear relation...
Spacing is nearly always larger than the burden. Stand Up Blast A blast designed to minimise forward movement and instead “stand up” the muckpile, usually for efficient digging with a face shovel. Stemming An inert material placed between or on top of explosive charges to contain the ...
A field test of LDL stope cut blast- ing was conducted, with a stemming length of 2.2 m and a minimum burden of 2.2 m in the boreholes. The highly satisfactory field blasting effect indicates that the stemming length and minimum burden are reasonable. Highlights • Ten ...
Meanwhile, the influence of burden and hole numbers on the ground vibration is controversial in the current literature, and the few studies on the stemming and spacing are not enough to prove the impact of these factors on the prediction of peak particle velocity. While several methods are used...
5) blasting of large spacing and small burden 宽孔距爆破 1. In this paper,the results of blasting are analysised and a new fragmentation mechanism model based on the hypothesis of forming beam for the blasting of large spacing and small burden and the destroy criterion expressed by v P (...
Methods for evaluating drill pattern parameters such as burden, spacing, borehole diameter, etc., at a blast site are disclosed. One method involves accumulating the burden contribu