Study On Blasting Design And Optimization Of Sanhe Gold Energy Open Pit

In order to improve the open pit mining status quo, enhance the efficiency of mine production and economic benefit, control blasting hazard in Hebei province, the blasting design and optimizing research of the open pit in Sanhe KENON Co,Ltd. is carried out. Mining design and optimization technology principles of open-pit bench are conducted through the author’s literature review, analysis and summary. Through on-site investigation and pit bench mining condition analysis, a preliminary design is developed to determine the blasting parameters of blasting. On site blast experiment is carried out and blasting area parameters are optimized. Finally, open-pit bench blasting design is done with Surpac three-dimensional software. The main achievements are as follows:Firstly, rock breaking mechanism of open-pit bench blasting is deduced by reference of rock crushing mechanism under explosive blasting. According to Swedish scholars, U. Iangefors, economic and reasonable minimum burden is introduced by his charge calculation formula in engineering blasting. Design principles and precautions are analyzed in slope areas. The pitch of millisecond delay blasting technology shock is summarized and large pitch-row minimum burden technology is used to improve blasting effect. Multiple factors on blasting are analyzed.Secondly, according to the blasting theory, open deep hole bench blasting parameters is designed normatively. Field construction is guided through designed blasting parameters. Specification outdoor steps are formed in blasting. Rock blasting volume is increased from thousands of cubic meters to50000cubic meters. Thus, production efficiency is greatly raised in mining areas. Blasting hazard is effectively controlled and the working environment in blasting area has been obviously improved. Problems and causes in blasting site are analyzed and summarized in this paper, and measures to solve the above problems are put forward.Thirdly, through field test research and optimizing the blasting design, the blasting drilling expenses, explosives, and detonator cost decrease more than$50000. By increasing dense coefficient of boreholes, blasting effect in the blasting parameter optimization is greatly improved, which enjoys great application value. Blasting effect is also improved after the optimization of blasting parameters and blasting hazard is effectively controlled. Procedures of the open-pit bench blasting design auxiliaries with Surpac three-dimensional software are described in details, which reduce repeated design and the workload of designers as well as improve the efficiency and accuracy of blasting design.