SYSTEMIC APPROACH TO ESTIMATION OF METHANE HAZARD IN DEVELOPMENT HEADINGS

The core of mine air safety is efficient ventilation of development and breakage headings. The key elements in the ventilation system of development headings of any purpose are a local fan and an air duct or a combination of air ducts, which represent a ventilation network with a specific aerodynamic drag. Local fan operation mode in a development heading is conditioned by the physical characteristics of the local fan–ventilation network system. The aerodynamic characteristics of the fan are converted to an electronic form using an assigned graphic system. In AutoCAD environment, finding of a couple of numbers x and y is performed, which are simultaneously curve coordinates and input data to be entered in Eureqa software. The proposed algorithm to model local fan modes in development headings enables solving direct and inverse problems connected with local ventilation in coal and ore mines at the stages of mine planning and operation. Accordingly, a mathematical model of aerodynamic conditions should be constructed for local fans in each development heading using accurate approximations of aerodynamic characteristics of a specific fan. The constructed mathematical model is added with the approximations of power input versus delivery of a fan. The procedure for the approximation of aerodynamic characteristics and power input–delivery curves of local fans allows the wanted analytical dependences to be obtained at the stage of the factory tests of local ventilation fans. The proposed approach to individual, subjectunique aerodynamic mathematical modeling of ventilation of development headings will essentially enhance mining safety in terms of gas hazard factor.

Keywords

Systemic approach, technology, estimation, methane hazard, development heading, coal mine.

Issue number: 8
Year: 2018
ISBN:
UDK: 622.414.2
DOI: 10.25018/0236-1493-2018-8-0-54-64
Authors: Sencus Val. V., Ermakov N. A., Radzhabova L. G.

About authors: Sencus Val.V., Candidate of Technical Sciences, Head of Mining Department, e-mail: senkus@yandex.ru, LLC «Proektgidrougol-H», Novokuznetsk, Russia, Ermakov N.A. (1), Leading Engineer, Radzhabova L.G. (1), Chief Specialist, 1) Branch of LLC «Sibniiugleobogaschenie», Prokopievsk, Russia.

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