نوع مقاله : مقاله پژوهشی
نویسندگان
1 دانشگاه یزد
2 دانشکده مهندسی معدن و متالورژی دانشگاه یزد
3 عضو هیات علمی دانشگاه یزد
4 فارغ التحصیل دکتری استخراج- دانشگاه یزد
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
The excessive emission of methane gas from the active extraction panel, as well as from the overlying and underlying coal seams, can affect the safety and productivity of underground coal mines. Since ventilation alone may not be sufficient to control methane levels in the longwall mining method, methane drainage techniques are employed. The use of various methane drainage methods can reduce methane emissions into the working environment of the extraction area, decrease the risk of explosions, and ultimately enhance safety and production. In the Tabas coal mine No. 1, a cross-measure borehole drainage method is used. This method involves drilling boreholes from the upper roadway into the strata above the coal seam being extracted, at stations spaced at different intervals along the extraction panel. Several factors influence the amount of gas emitted from drainage boreholes. This study was conducted on the E3 and E4 longwall panels in Tabas coal mine No. 1. After collecting data and identifying the influencing parameters, the Rock Engineering System (RES) approach was used to construct an interaction matrix and determine the most significant influencing variables. Encoding was performed by calculating the degree of influence of each parameter on the others, using the concepts of significance level and correlation. Ultimately, based on the significance level method, joint density was identified as the most influential parameter in both panels. In the correlation method as well, joint density was recognized as one of the key parameters affecting methane drainage; however, its level of influence in the significance level analysis was greater than that in the correlation analysis.
کلیدواژهها [English]
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