Study on Crust-Shaped Dust Suppressant in Non-Disturbance Area of Open-Pit Coal Mine—A Case Study

Abstract

Dust pollution in open-pit coal mines severely restricts the green development of mines. Therefore, dust control has become an important requirement for the sustainable development of the mining industry. With the goal of dust pollution prevention and control in open-pit coal mines, this paper puts forward the concept of a non-disturbance area of an open-pit coal mine. It clarifies the characteristics of dust generation, the coverage area, and the dust particle size distribution characteristics of the non-disturbance area. Taking the dust control at the dump site as an example, the study comprehensively utilizes indoor tests and field tests to develop a dust suppressant for the dump site and determine its dust suppression efficiency and effective service cycle. The results show that the D10, D50, and D90 particle sizes of dust in the non-disturbance area are smaller than those in the disturbance area, and the difference in particle size of D90 is the most obvious. Gelatinized starch and non-ionic polyacrylamide, as the main components of the dust suppressant, can effectively reduce dust pollution in the dump; the optimal concentration is 1.0%, and the dust suppression service cycle is more than one month. The developed dust suppressant does not contain corrosive, toxic, or heavy metal elements. Although the application of a dust suppressant will cause plant growth to lag, it does not affect plant health. The research findings serve as a reference for the zoning treatment of dust in open-pit mines.

Slope Deformation Mechanisms and Stability Assessment under Varied Conditions in an Iron Mine Waste Dump

“…For example, rainfall is able to affect factors such as soil suction, groundwater levels, soil strength, and surface erosion, as well as the interactions among the slope, vegetation, and atmosphere to rule and control the stress-strain state in the slope [39], which ultimately contribute to slope instability. Likewise, the forces generated by the earthquake loading are able to cause landslides [40,41]. In light of these challenges, our study focuses on developing a comprehensive methodology to examine the stability of deep open-pit mine slopes under various conditions, including normal circumstances, rainfall events, and seismic scenarios.…”

CFD Simulation Based Ventilation and Dust Reduction Strategy for Large Scale Enclosed Spaces in Open Pit Coal Mines—A Case of Coal Shed

“…Most workers in coal sheds use personal protective measures that cannot solve the problem of high dust concentration at the source. Therefore, in these workplaces with high dust concentrations, strict occupational health and safety measures should be taken or various techniques and equipment should be used to control the dust concentration in the workplace and improve the working environment of workers to ensure workers' health [5,6]. On the problem of indoor dust pollution, scientists at home and abroad have carried out many related studies.…”

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

“…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. Yin, J.J et al [24] developed a pollution evaluation system with a grey-scale averaging algorithm (G(a)) in digital image processing techniques to identify and analyse the distribution of soot clouds and subsequently determine the level of pollution.…”