Reducing the methane hazard in the longwalls by means of methane removal from the goafs

Mining of Sustainable Development

生态环境科学

Drenda, J.^1 ; Kania, J.^1 ; Markowicz, J.^1

Silesian University of Technology, Faculty of Mining and Geology, 2 Akademicka Street, Gliwice

44-100, Poland^1

关键词: Coal fields;    Longwalls;    Low concentrations;    Methane concentrations;    Methane-air mixture;    Removal systems;    Strength calculation;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/261/1/012006/pdf
DOI  :  10.1088/1755-1315/261/1/012006

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

This paper presents a method and system for suction of methane-air mixture from a longwall caving during exploitation. This method will significantly reduce or completely eliminate the cases of exceeding permissible methane concentrations (2%) at the longwall ends ensuring safe work for miners, reduce or eliminate interruptions in the exploitation due to shutdowns of electricity by recording-disabling methane detectors, as well as increase the yield from the longwall. This system may be used in longitudinal or transverse longwalls exploited to the coal field boundaries, using the U-ventilation method. This paper refers to the strength calculations of the methane removal boom. The method of operation of the methane removal system was given for low concentrations of methane, below 20%, in the air extracted from the caving. This paper also presents the advantages of methane removal from the longwall caving.