Calculation of the volume of air for ventilation of mining workings when operating self-propelled diesel equipment

Abstract

Purpose. Development of methods for determining the required volume of air for airing workings by the factor of exhaust gases from internal combustion engines (ICE). methodology. To determine the actual value of the cleaning efficiency (neutralization) of exhaust gases from automotive diesel emissions from engines which meet the environmental standard Tier III, field measurements on the magnitude of the carbon mon oxide concentration (CO) and nitrogen oxides (calculated as NO 2) after the catalytic converter were processed; they were con ducted in the conditions of the "United Kirov mine" and the Maleevsky, Tishinsky and Dolinny mines of "Kazzinc" LLC (RF). findings. The calculation of specific air consumption according to the method developed by the authors has demonstrated that its maximum value for the Tier III environmental standard is achieved when diluting emissions of nitrogen oxides and is equal to 2.86 m 3 /min. per hp. originality. During the study in the field of exhaust efficiency of gas purification after the neutralizer, the gascleaning coeffi cient was derived and applied in the method for calculating the amount of air. Studies performed in the area of calculating the specific air flow rate by the exhaust dilution factor have shown the possibility of significantly reducing the amount of air supplied to the atmosphere of the mine to dilute harmful impurities to standard values. Practical value. The calculation of the amount of air according to modern standards of diesel equipment will allow reducing the cost of ventilation of mine workings. This will increase the service life of equipment involved in the ventilation of mine workings, and significantly reduce the capital costs of mining enterprises, which will lead to positive economic effect.

Improvement of Working Conditions of Mining Workers by Reducing Nitrogen Oxide Emissions during Blasting Operations

“…While on the subject of underground and open pit mining, a special place is occupied by the extraction of minerals using drilling and blasting, which is the most widespread in the whole world. There are a number of hazardous and harmful factors in the deposits where blasting operations are carried out, the most common of which are the open pit slope failure [13] and air pollution of the working areas by the components of gases formed during the work of internal-combustion engines [14] or after the explosion, and which are a combination of oxide nitrogen, carbon dioxide, nitrogen dioxide and carbon monoxide. We can make a conclusion that as the number of open pit mines increases due to the elimination of mines in Europe and other continents, the risk of accidents due to acute poisoning with post blast gases increases too.…”

Experimental Support of Field Trial on the Polymer Flooding Technology Substantiation in the Oil Field of Western Kazakhstan

“…It was previously believed that polymer flooding was limited to use only in fields with light oil or with medium viscous oil, and thermal oil recovery methods were strictly applied in fields characterized by high viscosity oil (Babaytsev et al, 2017;Kuznetsova and Rabinskiy, 2019;Formalev et al, 2017;Gendler et al, 2019). However, recently in world practice, this provision is no longer observed in connection with the successful use of polymer flooding for highviscosity oil, where thermal methods do not seem feasible (Radyuk et al, 2019;Samarin et al, 2019).…”