Kokoulin I.Ye., Kliuiev E.S. Reduction of the risk of selecting the emergency ventilation mode through local control of ventilation flows

Details

Parent Category: Geo-Technical Mechanics, 2023

Category: Geo-Technical Mechanics, 2023, Issue 167

 

Geoteh. meh. 2023, 167, 47-56

https://doi.org/10.15407/geotm2023.167.047 

 

REDUCTION OF THE RISK OF SELECTING THE EMERGENCY VENTILATION MODE THROUGH LOCAL CONTROL OF VENTILATION FLOWS

Kokoulin  I.Ye., Kliuiev  E.S.

M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine

UDC [622.8.1/8:622.33.012.2]:005.2

Language: English

Abstract.  The implementation of measures regarding the organization of emergency ventilation of mine is connected with various types of risks, as in other cases of the operation of high-risk enterprises. In particular, this applies to the emergency risk that arises when there is a need for the emergency evacuation of people from the mine workings, gassed with fire products (that is, the risk of their poisoning or damage due to the thermal factor) and the emergency risk that is provoked by the wrong choice and implementation of the emergency ventilation mode. Both types of risks require to reduce the use of means of ventilation - main and local ventilation fans. Provision should also be made for the use of various passive control devices. The main result of the methodological approach used today is the selection of the emergency ventilation mode, which maximally limits the gassing zone of the mine ventilation network with gaseous combustion products. At the same time, the criterion for the effectiveness of the emergency evacuation of miners should be the maximum use of non-gasified workings, which achieves the goal of managing ventilation in the event of accidents.
The proposed control function, which characterizes the degree of risk of distribution of fire gases in mine workings, is the root mean square deviation of the concentration of fire gases in the controlled branches of the network from the required level of stabilization. For two control devices and two controlled areas, it is part of a three-dimensional cone, and the control region is bounded by two hyperbolas. The problem formulation looks similar when the size of the base of the regulating devices is increased . A limitation on the task is formulated, and a conclusion is made regarding the possibility of applying analog methods of dynamic programming for its solution. As such, the multi-step optimization method, the one-step optimization method, and the extreme coordinate optimization method (the last one is the most effective) are considered. The greatest efficiency of their use will be achieved with the introduction of an automated ventilation control system, which provides feedback from the means of regulation and regulatory devices. 
Keywords: emergency risk, aerological risk, management functionality, regulatory devices, exogenous fire.

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About the authors:

Kokoulin Ivan Yevhenovych, Candidate of Technical Sciences (Ph.D.), Senior Researcher, Senior Researcher in Department of Problems of Underground Mining 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.

Kliuiev Eduard Serhiiovych, Candidate of Technical Sciences (Ph.D.), Senior Researcher, Senior Researcher in Department of Problems of Underground Mining 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.

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