Kokoulin I., Batur M. On the question of reducing the risk of untimely detection of an aerological emergency in the ventilation network of a coal mine

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Parent Category: Geo-Technical Mechanics, 2024
Category: Geo-Technical Mechanics, 2024, Issue 170

Geoteh. meh. 2024, 170, 78-89

 

ON THE QUESTION OF REDUCING THE RISK OF UNTIMELY DETECTION OF AN AEROLOGICAL EMERGENCY IN THE VENTILATION NETWORK OF A COAL MINE

1Kokoulin I.  2Batur M. 

1 M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine
2 Istanbul Technical University

UDC 622.451:622.817

Language: English

Abstract. The risks of an aerological emergencies can be of different nature, namely:

a) a working with a fire source can have a significant length and ramifications after it, so the signal from the sensor can provoke the introduction of a emergency elimination plan position that is different from the planned one;

b) if there are enough sensors, it is possible to reduce the risk by placing the sensors at intermediate points in order to ensure a predetermined fire detection time;

c) if there are not enough sensors, it is possible to reduce the risk by reducing the fire detection time by controlling several fire-hazardous areas with one sensor (although a certain risk remains).

Direct factors for calculating the risk of an event (the probability of its occurrence and the magnitude of the consequences) are unsuitable for assessing the risk of incorrect selection of the basis for emergency detection sensors, since they cannot be determined in advance. Therefore, in order to reduce it, it is necessary to proceed to assessing the risk using indirect factors that do not have a probabilistic form. The use of such indirect factors is the purpose of solving the problem of improving the assessment of the emergency risk of emergency control. This is precisely the novelty of the proposed approach.

The purpose of the article is to characterize methods for reducing the risk of untimely detection of an aerological emergency in the ventilation network of a coal mine. According to this purpose, the following tasks will be solved: 

a) fire detection under the condition of a given detection time and the presence of an unlimited number of sensors in order to optimize it;

b) fire detection under the condition of a given available number of sensors and places for their possible installation in order to reduce the time for detecting an emergency.

Two possible statements of tasks for reducing the risk of untimely detection of an aerological emergency are characterized and methods for solving them are given. The presentation of the material is illustrated by control examples.

The indicator of risk reduction on the mine scale will be the maximum sensor response time in the event of an emergency in all mine workings that are dangerous by carbon monoxide. All other values will obviously be smaller. If this indicator exceeds the acceptable one, additional measures must be taken.

Keywords: aerological emergency, exogenous fire, indirect risk factors, carbon monoxide sensor, sensor basis.

 

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About the authors:

Kokoulin Ivan, Candidate of Technical Sciences (Ph.D.), Senior Researcher in Department of Problems of Development of Deposits at Great Depths, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. ORCID  0000-0002-3888-8119

Batur Maryna, Graduate Student, Faculty of Civil Engineering, Istanbul Technical University, Istanbul, Turkey, This email address is being protected from spambots. You need JavaScript enabled to view it. ORCID 0000-0001-9284-8858