Author 1:
Name & Surname: Kaledina N. O.
Company: Mining Institute of National University of Science and Technology MISiS (Moscow, Russia)
Work Position: Professor, Head of department
Scientific Degree: Doctor of Engineering Sciences
Contacts: e-mail: nok52@mail.ru

Author 2:
Name & Surname: Kobylkin S. S.
Company: Mining Institute of National University of Science and Technology MISiS (Moscow, Russia)
Work Position: Assistant Professor
Scientific Degree: Candidate of Engineering Sciences

Ventilation of dead-end headings is highly essential for safe and productive mining. Mine ventilation design in Russia is at the moment implemented under oldfashioned guidelines based on empirical relations obtained under entirely different geotechnical parameters of underground mining and air–gas–dust dynamics than those existing in current mines. The prime ventilation mode in dead-end headings in coal mines with high gas content is pressure ventilation. It has a number of shortages. Air flow velocity exceeds critical air flow and creates high dust conditions in face area. High nonuniformity of air flow velocity distribution conditioned by high air consumption in the face area contributes to origination of dead-air spaces near mining and loading machines. Return ventilation air with toxic gas and dust content flows along the entire length of the excavation. Widely spread worldwide, the suction ventilation is not recommended in Russia’s mines with high gas content, while the hybrid ventilation mode is rather complicated, which reduces its serviceability. Efficient application of suction ventilation needs definition of vent modes and ventilation flow chart parameters. To this effect, it is suggested to use the underground mine air–gas dynamic system modeling method developed and tested by the Moscow Mining University. The method allows studies in a wide range of modes of mine ventilation systems with any parameters of underground excavations, in real time and at a scale of 1:1. The use of the offered method requires knowing ratio of the components of gas balance within a work site in a mine. With the available automated control of mine air parameters, statistics on gas emissions in dead-end headings is applicable. According to the analysis of the performance of the considered approaches to mine ventilation, the justification of a mine ventilation method includes the requirement of the efficient gas and dust removal and air turbulization in the face area (to prevent from local methane accumulation). When gas emission is significant and ventilation of a heading needs air flow rate incompatible with the dust extraction capabilities, additional measures of gas emission control are required to be undertaken (degassing, aerodynamic sealing, etc.).
This work was carried out within the State Contract No. 2014/97.

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