A good number of empirical formulae and methods dealing with the analysis of the effects of blast-induced ground vibrations have been developed. The most common approach suggested for estimating the attenuation of particle velocity on the ground is to scale the distance (scaled distance, SD). ...
Similar to burnt rock, which is rich in joints and fissures, the occurrence, shape, extension scale, density, spatial distribution geometric characteristics, cementation and filling of structural planes will have a direct impact on the blasting process and the final blasting effect. The influence of...
75 have employed hybrid SVR models to assess the fly-rock distance in surface mining. Support Vector Regression (SVR), or regression-based SVM in the literature, can be described as a linear SVR using the formula in Eq. (9). $$ f\left( x \right) = \sum\limits_{i}^{n} {\varphi...
(6) can be used to predict the burden velocity of a full-scale blast. However, this equation is not valid for a blast with a decoupled charge. To predict burden velocity in a blast with decoupled charge, Eq. (6) must be modified or a new formula should be developed. In addition, ...
Suppose that qa = 0.95 kg/m2, Q = 150.1 kg can be obtained based on formula (6). 4.5. Distance to the Cushion Hole Too small a distance between the presplit blast hole and a cushion hole is likely to damage the presplit face, while if the distance is too large, the rocks...
the factors into account. Blasting vibration monitoring data show that the main factors that impact on blasting vibration strength are the amount of explosives and the distance from the detonating point to the monitoring point. Therefore, Sadov’s formula is used to describe the vibration intensity:...
Q. Deformation forecasting and stability analysis of large-scale underground powerhouse caverns from microseismic monitoring. Int. J. Rock. Mech. Min. Sci. 86, 269–281 (2016). Article Google Scholar Yang, J. H., Lu, W. B., Zhao, Z. G., Yan, P. & Chen, M. Safety distance for...
When the load is low, the stress within the rock is insufficient to cause large - scale damage to the entire rock mass; however, it suffices to cause the thin layer on the rock surface to fracture and separate. As the load gradually increases, the internal pressure of the surrounding ...
1) A safety distance of ground shaking in mine blasting is determined. In this case, surrounding buildings need to be taken into consideration, and a suitable blasting distance is selected according to tremors that the buildings can withstand. It is found through scientific research that different...
wherein the explosive is decoupled from and is positioned at a distance from the downhole end of the stemming means to dissipate a detonation shock wave generated during detonation of the explosive to protect the stemming means from the detonation shock wave, wherein the cartridge includes a cartr...