Compressed air as a type of safe technological energy carrier is widely used in many industries. In economically developed countries energy costs for the production and distribution of compressed air reach 10 % of the total energy costs. The analysis of compressed air production and distribution systems in the industrial sector shows that the efficiency of the systems is at a relatively low level. This is due to the fact that insufficient attention is paid to these systems since the compressed air systems energy monitoring has certain difficulties – the presence of complex and branched air pipeline networks with unique characteristics; low sensitivity of the equipment which consumes compressed air; the complexity of auditing pneumatic equipment that is in constant operation. The article analyzes the options for reducing the cost of production and compressed air distribution. One of the promising ways to reduce the compressed air distribution cost is timely detection and elimination of leaks that occur in the external air supply network of the enterprise. The task is solved by hardware-software monitoring of compressed air pressure at key points in the network. The proposed method allows real-time detecting of emerging air leaks in the air duct network and sending commands to maintenance personnel for their timely localization. This technique was tested in the industrial conditions of ALROSA enterprises on the air pipeline network of the Mir mine of the Mirninsky Mining and Processing Plant and showed satisfactory convergence of the calculated leakage values with the actual ones. The practical significance of the obtained results is that the developed method for monitoring air leaks in the air duct network is simple, it requires an uncomplicated software implementation and allows to localize leaks in a timely manner, thereby reducing unproductive energy costs at the enterprises.
The characteristic of Russia and foreign vehicle tunnels are provided in paper and advantages of their placement in the conditions of the city are noted. It is shown that one of the main factors defining negative impact on environment in the period of tunnels driving is mine equipment, and at operation – vehicles. The analysis of essential differences of features of pollution of atmospheric air at construction of tunnels from its pollution at construction of buildings on a surface is given. The examples illustrating levels of negative impact of the upcast ventilation shaft airflow on atmospheric air are given and the ventilation schemes reducing this influence are offered. It is shown that during operation of road tunnels of pollution of the air environment can extend on considerable distances from tunnel portals. Numerical calculations of concentration of carbon oxides and nitrogen during removal of the upcast ventilation shaft airflow through portals and through the mines built near them are executed. Technical solutions on purifications of tunnel air by means of electrostatic filters are described.
On the basis of instrumental measurement data the major factor defining a radiation environment in underground facility of Saint Petersburg the subway are radon and radon daughters is shown. The hypothesis of influence on dynamics of radon accumulation in underground facility of the moisture entering from rocks is confirmed.
On the example of coal mines of Vorkuta it is shown that in the coal industry of Russia it is necessary to consider as an essential reserve of increase of production safety realization of the organizational actions directed on preventive identification of violations of safety regulations, potentially bringing to accidents, carrying out behavioural security audits, and also involvement of miners in management of occupational safety and health and industrial safety.
The mine technical features of building of underground structures determining selection and parameters of ventilating systems and an air conditioning are reviewed, the engineering solutions on increase of control efficiency by quality of air are offered.
It is noted overburden dump which are forming on open-pit mining of mineral deposits, are powerful sources of environment impact, including the population living in areas on which dust pollution extends. Procedure of zonation of the territory surrounding overburden dump on size of technogenic risk is developed. As an example, the assessment of distribution of technogenic risk for conditions of overburden dump of Olenegorsky combine is carried out.
Results of field observation of atmospheric air pollution at a construction of transport tunnels on highway and railway Adler – Red Forest Meadow are presented. Features of an environmental pressure dynamics on atmospheric air are determined. The estimation of pollutant emission influence from transport tunnels on atmospheric air is given. Possibility of concentration of pollutants decrease in atmospheric air at the expense of ventilation shafts use for removal from the tunnel of outgoing air flow is shown.
For effective ventilation Kuznetsovsky railway tunnel the longitudinal scheme of ventilation based on use of jet fans is offered. It is shown that use of the offered scheme of ventilation at influence of natural draft and piston effect of trains is impossible without an automatic control system of ventilation (ACSV). The principles of work ACSV taking into consideration natural and operational factors are proved.
Classification of damage from accidents and crashes is given. Procedure optimization expenses for a labour protection and definition of economically sound risk of accidents and crashes is offered. The estimation of economic efficiency of personnel development serving the self-propelled mining equipments on ore mine «Northern» of industrial complex «Pechenga Nikel» is carried out.
The article describes climatic and mining-technical conditions influencing frost formation process. It was noted that the radical tools for preventing frost formation in winter periods is creation of positive temperature in tunnels by heating the incoming outside air. We formulated tasks, which solution will promote development of engineering calculation method for heating systems parameters. The article provides results of theoretical studies based on mathematical modelling and analytical solutions and data on field instrumental measurements, which were processed with similarity criteria. It compares mathematical modelling results on determining amount of tunnel incoming air flow with portal gates and calculations data from experimentally determined coefficient of local resistance. We proved the energy efficiency of placing the tunnel portal gates and validated the places of preheated air injection points and removal of cool air from this flow, which provides maximal energy effect.