Open Pit Mining with Blasting: GeoEcological Aftermath

Адушкин, В. В.; Solov'ev, S.P.; Спивак, А. А.; Khazins, V. M.

doi:10.1134/s1062739120026794

Cited by 9 publications

(4 citation statements)

References 6 publications

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“…The significance of the choice of components in OSM-type explosives was wellevidenced by the comparison of even the initial densities of the samples produced using PM and MS, even though only 0.95 wt.% of either component was used. The initial densities of the OSM formulations (Table 2) utilising PM (1B, 2A, 3A) were found to be on the order of 0.8 g/cm 3 , whereas formulations produced using MS (1C, 2B, 3B, 4A) exhibited initial densities on the order of 1.2-1.3 g/cm 3 (Figure 1). In all cases, the passage of time resulted in a gradual decrease in OSM sample density.…”

Section: Osm Density Investigationmentioning

confidence: 99%

“…Explosives (EXs) are extensively used for civilian purposes, with blasting operations playing a crucial role in mining (underground and open pit) [ 1 , 2 , 3 ], civil engineering (demolitions, tunnel construction) [ 4 , 5 ] and materials processing (e.g., explosive welding) [ 6 ]. Virtually all explosives currently used for the above purposes contain ammonium nitrate, nitric acid esters or nitrocompounds.…”

Section: Introductionmentioning

confidence: 99%

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Following the Decomposition of Hydrogen Peroxide in On-Site Mixture Explosives: Study of the Effect of the Auxiliary Oxidising Agent and Binder

et al. 2023

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The issues of safety and its impact on both human health and the environment are on-going challenges in the field of explosives (EXs). Consequently, environmentally-friendly EXs have attracted significant interest. Our previous work, dedicated to on-site mixed (OSM) EXs utilising concentrated hydrogen peroxide (HTP) as an oxidising agent, revealed that the gradual decomposition of HTP may be harnessed as an additional safety measure, e.g., protection from theft. The rate of HTP decomposition is dependent on the OSM components, but this dependence is not straightforward. Relevant information about the decomposition of HTP in such complex mixtures is unavailable in literature. Consequently, in this work, we present a more detailed picture of the factors influencing the dynamics of HTP decomposition in EXformulations. The relevant measurement and validation methodology is laid out and the most relevant factors for determining the rate of HTP decomposition are highlighted. Among these, the choice of auxiliary oxidising agent is of particular relevance and it can be seen that the choice to use ammonium nitrate (AN), made in previous works dealing with HTP-based EXs, is sub-optimal in terms of maintaining the stability of HTP. Another important finding is that glass microspheres are not as inert to HTP as would be expected, as replacing them with polymer microspheres significantly slowed the decomposition of HTP in the investigated OSM samples.

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Section: Osm Density Investigationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Following the Decomposition of Hydrogen Peroxide in On-Site Mixture Explosives: Study of the Effect of the Auxiliary Oxidising Agent and Binder

et al. 2023

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“…Among them, Li, X.X et al [19] used AERMOD software to simulate dust dispersion and establish dust concentration evaluation and dispersion models to obtain contour maps of dust concentrations around coal mines, indicating that surface mining drilling and blasting are the main dust sources of particulate matter in surface coal mines, and the main sources of PM2.5, PM4.0 and PM10 are drilling operations. Adushkin, V. V. et al [20,21] presented gas dynamics calculations of post-blast dust and gas cloud elevations for locating solid particles and their concentrations in the troposphere, pointing to the effects of largescale blasting on regional seismicity. Khazins, V. M. [22,23] studied the initial phase of the formation of hot thin dust and gas clouds after scattering of blast products and the subsequent buoyancy-induced induced rise of the heat, obtaining the relationship between the height of the rise and the size of the gas and dust clouds and the distance between adjacent blasts.…”

Section: Introductionmentioning

confidence: 99%

Research on blasting mechanism and blasting effect of aqueous media in open pit coal mines

Ding

Qin

et al. 2023

Preprint

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The existing mining procedure for coal surface mining is perforation-blasting-mining-loading-transportation-disposal, in which the blasting link has problems such as low loading efficiency due to poor blasting effects and environmental pollution caused by the dust generated by blasting. This paper presents a detailed analysis of the mechanical characteristics of the aqueous media, its role in transferring energy during blasting, the role of the aqueous media in energy transfer, and the bubble pulsation phenomenon. The dynamic process of blasting was simulated with the help of TrueGrid/LS-DYNA finite element analysis software to study the changes in the maximum principal stresses at the perimeter of the hole, the top and the foot of the slope. Finally, blasting field tests were carried out in conjunction with actual mine production conditions. The dust reduction rate of aqueous media blasting reached 75%, and a comprehensive evaluation of two groups of traditional dry hole blasting and three groups of aqueous media blasting was carried out using the AHP-fuzzy comprehensive evaluation method.

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“…Among them, Li, et al 19 used AERMOD software to simulate dust diffusion, establish dust concentration evaluation and diffusion modeling, and obtained contour plots of dust concentration around coal mines. Adushkin et al 20 , 21 presented gas dynamics calculations of dust and gas cloud elevations after blasting, pointing out the effect of large-scale blasting on regional seismic activity. Khazins 22 , 23 , studied the initial stages of the formation of thermally dilute dust and gas clouds after the scattering of the explosion products, obtaining a relationship between the height of ascent and the size of the gas and dust clouds and the distance between neighboring explosions.…”

Section: Introductionmentioning

confidence: 99%

Research on blasting mechanism and blasting effect of aqueous media in open pit coal mines

Ding,

Liu,

et al. 2023

Sci Rep

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Surface coal mining procedures include piercing—blasting—mining and loading—transportation—discharging, blasting link exists due to the poor blasting effect leads to low loading efficiency, blasting dust caused by environmental pollution and other problems. In this paper, from the mechanical characteristics of the water medium, we analyze in detail the transferring effect, transducing effect and bubble pulsation phenomenon of the water medium in the blasting process. The results show that when the blasting medium is water medium, the maximum principal stress is 1.53 times that of air medium; the peak energy transfer can be up to 2.73 times that of air medium. With the help of TrueGrid/LS-DYNA finite element analysis software to simulate the dynamic process of blasting, the study of the maximum principal stresses around the hole, the top of the slope, the foot of the slope on the maximum principal stress changes, the results show that the maximum principal stresses around the hole, the top of the slope, the foot of the slope unit with the increase in the water content is gradually increasing trend. Finally, combined with the actual mine production conditions for blasting field test, water-mediated blasting dust reduction rate of 75%, the use of AHP—fuzzy comprehensive evaluation method of two groups of traditional dry hole blasting and three groups of water-mediated blasting comprehensive evaluation, the results show that the water-mediated blasting scores are higher than the traditional dry hole blasting, proving that the water-mediated blasting has a certain prospect of engineering applications.

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Open Pit Mining with Blasting: GeoEcological Aftermath

Cited by 9 publications

References 6 publications

Following the Decomposition of Hydrogen Peroxide in On-Site Mixture Explosives: Study of the Effect of the Auxiliary Oxidising Agent and Binder

Following the Decomposition of Hydrogen Peroxide in On-Site Mixture Explosives: Study of the Effect of the Auxiliary Oxidising Agent and Binder

Research on blasting mechanism and blasting effect of aqueous media in open pit coal mines

Research on blasting mechanism and blasting effect of aqueous media in open pit coal mines

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