Low-permeable gas-bearing and outburst-hazardous coal seam mining in the Karaganda Coal Basin

The layers of the Karaganda coal basin have a high gas content and low permeability. In addition, coal seams are dangerous due to sudden emissions of coal and gas. In article there are a brief overview of the parameters of mining operations and the choice of preparation methods is presented. Attention is focused on current and possible future practices in the Karaganda basin. Traditional methods of mining (and overworking) of a coal seam and achieving a higher level of permeability due to unloading of the massif are not always feasibility due to mining and geological conditions. Emissions from sinking, especially through the d6 seam, are still a big problem. New technologies for preventing emissions and predicting geological anomalies are being tested. The management of gas emission during cleaning operations also requires the integration of special methods. The results of improving the quality of sealing the wellhead of pre-degassing wells are presented in this article. Improving the quality of sealing has provided a significant increase in the concentration of methane and allows it to be used for generating electricity. The article considers the applied and prospective methods for ensuring effective control of gas release and extraction of conditioned methane.

Keywords: gas content of coal seams, permeability, preliminary degassing, emission hazard, degassing of the developed space, advance degassing, advanced degassing, unloading, forecast, cost.
For citation:

Baymukhametov S. K., Imashev A. Zh., Mullagaliev F. A., Mullagalieva L. F., Kolikov K. S. Low-permeable gas-bearing and outburst-hazardous coal seam mining in the Karaganda Coal Basin. MIAB. Mining Inf. Anal. Bull. 2021;(10-1):124—136. [In Russ]. DOI: 10.250 18/0236_1493_2021_101_0_124.

Acknowledgements:
Issue number: 10
Year: 2021
Page number: 124-136
ISBN: 0236-1493
UDK: 622.83
DOI: 10.25018/0236_1493_2021_101_0_124
Article receipt date: 12.07.2021
Date of review receipt: 20.08.2021
Date of the editorial board′s decision on the article′s publishing: 10.09.2021
About authors:

Baymukhametov S. K.1, Dr. Sci. (Eng.), Professor, Vice-President of the expert group on coal mine Methane of the United Nations Economic Commission for Europe (Karaganda);
Imashev A. Zh.1, Doctor Of Ph.D, Head of the department “Development of mineral deposits”;
Mullagaliev F. A.1, Cand. Sci. (Eng.), Senior Lecturer;
Mullagalieva L. F.1, doctoral student;
Kolikov K. S.2, Dr. Sci. (Eng.), Associate Professor, Head of the Department of Safety and Ecology of Mining Production;
1 Karaganda Technical University, Karaganda, Kazakhstan;
2 Mining Institute NUST “MISiS”, Moscow, Russia.

 

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