Abstract
The relevance of a solution of the problem of endogenous fire safety in seams liable to self-ignition is shown. The possibilities of numerical methods of researches of gasdynamic processes are considered. The analysis of methodical approaches with the purpose to create models and carry out numerical researches of aerogasdynamic processes in longwall panels of gas mines is made. Parameters of the gob for longwall mining are considered. The significant influence of geological and mining conditions of conducting mining operations on distribution of air streams on longwall panels and effective management of gas emission is shown. The aerogasdynamic model of longwall panels for further research of influence of parameters of ventilation and properties of gob is presented. The results of numerical researches including distribution of air streams, fields of concentration of methane and oxygen at application of various schemes of airing for conditions of perspective mines of the Pechora basin and Kuzbass are given. Recommendations for increase of efficiency of the coal seams mining liable to selfignition are made. The directions of further researches are defined.
Highlights
The endogenous fires in coal mines still represent a danger being the second most important after explosions of methane for all leading coal-mining countries as despite the low frequency of emergence result in significant economic damages and extreme danger to life of miners [1, 4, 15, 17]
The main directions of aerogasdynamic researches with the use of program complexes are connected with studying the distribution of air streams and methane [16] and with studying the distribution of oxygen on a longwall panel when using various schemes of ventilation with identification of dangerous zones, with the subsequent processing or change of parameters of ventilation and draining of methane [7, 9].The complexity of ensuring adequacy of the models to real conditions used by researchers is connected, first of all, with insufficient study of a gob area and influences of their characteristics on aerogasdynamic processes [10]
The intensity of ventilation of the gob and possibility of formation of dangerous zones substantially depend on permeability of the broken-down rock and parameters of the applied way of gas management on the longwall panel
Summary
The endogenous fires in coal mines still represent a danger being the second most important after explosions of methane for all leading coal-mining countries as despite the low frequency of emergence result in significant economic damages and extreme danger to life of miners [1, 4, 15, 17]. The main directions of aerogasdynamic researches with the use of program complexes are connected with studying the distribution of air streams and methane [16] and with studying the distribution of oxygen on a longwall panel when using various schemes of ventilation with identification of dangerous zones, with the subsequent processing or change of parameters of ventilation and draining of methane [7, 9].The complexity of ensuring adequacy of the models to real conditions used by researchers is connected, first of all, with insufficient study of a gob area and influences of their characteristics (collapse zone height, porosity, permeability, etc.) on aerogasdynamic processes [10] In this connection studying of influence of the specified characteristics of a gob when using various ways of management of gas in entries of longwall panels on formation of the zones dangerous on self-ignition of coal is of considerable scientific and practical interest [14]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
