To improve the productivity and efficient of modern large-scale open-cut mines, a number technologies are developed trialed, including new blasting equipment, larger holes, high benches, air spacing, short-delay within holes. However, relative parameters need field calibration further investigation theories on these techniques required. This paper studied bench at Barun Eboxi Mine Baotou Iron S...

This paper presents the effect of selected parameters of abrasive blasting on the strength of a joint between dental porcelain and metal base. Experiments were conducted for different grain sizes of abrasive material and different blasting angles, with a constant blasting pressure. InLine dental porcelain was fused on samples of cobalt-chromium alloy following abrasive blasting; they were subse...

Design of blasting parameters plays an important role in the optimization of mining cost as well as cost of subsequent processing of ore. Drilling and handling costs are the major mining cost. This work presents an indirect optimization model for mining cost, through optimization of blasting parameters for a particular set of drilling and loading equipment.

To monitor the underwater sound and pressure waves generated by anthropogenic activities such as underwater blasting and pile driving, an autonomous system was designed to record underwater acoustic signals. The underwater sound recording device (USR) allows for connections of two hydrophones or other dynamic pressure sensors, filters high frequency noise out of the collected signals, has a gai...

A comprehensive investigation was carried out to minimize the cost price of the rock fragmentation process including: drilling, blasting, secondary blasting and separating the large boulders (oversize rocks) while loading, until the optimized fragmentation, powder factor and ratio of burden (B) to blasthole diameter (?h) were achieved by doing several stages of drilling and blasting practically...

© Translational Andrology and Urology. All rights reserved. Transl Androl Urol, 2015;4(S1) www.amepc.org/tau glands gently by lens body, using holmium laser blasting to peel glands, and abandon conventional mirror peeling method; (IV) if bleeding is encountered, the laser fibre can be defocused slightly from the bleeding point to achieve haemostasis; (V) we crushed glands vacantly with the stat...

Bit-precise reasoning is essential in many applications of Satisfiability Modulo Theories (SMT). Most approaches for solving quantifier-free fixed-size bit-vector logics (QF BV) rely on bit-blasting. In previous work, we have shown that bit-blasting is not polynomial in general [19], and later proposed QF BV 1, a class of bit-vector problems that is PSpace-complete [15]. In this paper, we give ...

Bit-precise reasoning is essential in many applications of Satisfiability Modulo Theories (SMT). In recent years, efficient approaches for solving fixed-size bit-vector formulas have been developed. Most of these approaches rely on bit-blasting. In [1], we argued that bit-blasting is not polynomial in general, and then showed that solving quantifier-free bit-vector formulas (QF BV) is NExpTime-...

The paper discusses operations aimed at creating a safer natural or man made rock slope by artificially inducing the displacement of unstable elements by blasting. A detailed analysis of the problems with the use of explosives present when conducting these activities is carried out focusing on the advantages and disadvantages of this technology. The results of two examples of demolition of inst...