Method of gas emission control for safe working of flat gassy coal seams

Innovations and Prospects of Development of Mining Machinery and Electrical Engineering

矿业工程;电工学

Vinogradov, E.A.^1 ; Yaroshenko, V.V.^1 ; Kislicyn, M.S.^1

Saint-Petersburg Mining University, 2, 21 line, Saint Petersburg

199106, Russia^1

关键词: Economic indicators;    Effect of parameters;    Effective management;    Methane emissions;    Methane-air mixture;    Numerical research;    Technological scheme;    Theory and practice;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/87/2/022023/pdf
DOI  :  10.1088/1755-1315/87/2/022023

来源: IOP

【 摘 要 】

The main problems at intensive flat gassy coal seam longwall mining are considered. For example, mine Kotinskaja JSC "SUEK-Kuzbass" shows that when conducting the work on the gassy coal seams, methane emission control by means of ventilation, degassing and insulated drain of methane-air mixture is not effective and stable enough. It is not always possible to remove the coal production restrictions by the gas factor, which leads to financial losses because of incomplete using of longwall equipment and the reduction of the technical and economic indicators of mining. To solve the problems, the authors used a complex method that includes the compilation and analysis of the theory and practice of intensive flat gassy coal seam longwall mining. Based on the results of field and numerical researches, the effect of parameters of technological schemes on efficiency of methane emission control on longwall panels, the non-linear dependence of the permissible according to gas factor longwall productivity on parameters of technological schemes, ventilation and degassing during intensive mining flat gassy coal seams was established. The number of recommendations on the choice of the location and the size of the intermediate section of coal heading to control gassing in the mining extracted area, and guidelines for choosing the parameters of ventilation of extracted area with the help of two air supply entries and removal of isolated methane-air mixture are presented in the paper. The technological scheme, using intermediate entry for fresh air intake, ensuring effective management gassing and allowing one to refuse from drilling wells from the surface to the mined-out space for mining gas-bearing coal seams, was developed.