Mineev S.P. On the issue of prevention of accidents caused by methane explosions in coal mines

Details

Parent Category: Geo-Technical Mechanics, 2018

Category: Collection of scientific papers «Geotekhnicheskaya Mekhanika» Issue 138

Geoteh. meh. 2018, 138, 115-136

DOI: https://doi.org/10.15407/geotm2018.01.115

On the issue of prevention of accidents caused by methane explosions in coal mines

Mineev S.P.

Authors:

Mineev S.P., Dr. Tech. Sciences, Professor, Head of Department (IGTM NAS of Ukraine)

UDC 622.817 (571.17)

Language:Russian

Abstract.

Main issues on preventing mine accidents, which are associated with explosions of methane-air mixtures during mining operations, are considered. Essence of the problem of high risk of explosion and gas-and-dust hazard during mining operations in mines is considered. In this article, explosion hazard in mines is analyzed, and key causes and factors leading to explosion in the mine are considered, among which are the following: violation of ventilation regime due to the redistribution of air between the roadways; changed operating mode and work pace of mining machines, as well as significant changes in mining and geological conditions. When roadway with geological disturbance, zone of stratum unloading, mouths of degassing, exploratory and other technical wells are opened by the face without undertaking appropriate measures for improving ventilation, then their gassing, including of impulsive character, often happens.

The main factors that provoke methane explosions also include sudden coal and gas outbursts and methane blowers and impulse emissions. Besides, key reasons of the explosions include improper degassing of roadways previously stopped for isolating area with fire or explosion risk; scheduled stoppage of main and auxiliary fans as a result of revision, repair, dismantling and relocation of equipment; reverse air jet; engineering errors in calculations and air measurements; application of imperfect schemes of opening, preparation and development of seams and development systems; unsatisfactory control over ventilation in the mine roadways, as well as disfunction of gas measuring equipment, and other factors.

Causes and factors of methane accumulation were analyzed and classified into groups with description of their diversity; special attention was focused on combination of unfavorable factors and underestimation of the dust and gas factors in the process of mining.

Keywords:

accident, methane explosions, fire, аir-gas monitoring, coal mine.

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About the author

Mineyev Sergey Pavlovich, Doctor of Technical Sciences (D. Sc.), Professor, Head of the department, Institute of Geotechnical Mechanics named by N. Polyakov of National Academy of Science of Ukraine (IGTM NASU), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it.

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