基于理论计算和实地考察的伊朗Tabas机械化煤矿甲烷排气站间适宜距离的确定

IF 2.4 Q2 MINING & MINERAL PROCESSING
A. Hosseini, Mehdi Najafi, A. Morshedy
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引用次数: 2

摘要

地下开采过程中产生大量瓦斯,降低了开采生产率,增加了安全隐患。有效地从地下矿井的煤层和围岩中抽放瓦斯,不仅提高了安全生产,而且提高了生产效率。当通风空气不能将矿井的甲烷排放稀释到允许限度以下时,必须进行甲烷排放。交叉钻孔法是一种瓦斯抽放方法,它从尾板巷道向煤层顶板或底板地层的无应力区钻孔。这是塔巴斯1号煤矿采用的主要方法。该方法的有效参数之一是甲烷排气站之间的距离,它直接影响排气站所需钻孔的长度。本研究通过放置在长壁板上的甲烷传感器和风速计测量通风空气中的甲烷,并测量甲烷排放量。此外,本研究还利用获取和分析的数据,基于交叉测量钻孔法确定甲烷排气站之间的合适距离。在现场试验中,对塔巴斯1矿E4盘3个不同站位距离的钻孔布置进行了研究。然后,从这些布置中排出的气体量相互比较。甲烷排水站之间距离为9 ~ 12 m时,甲烷排采效率最高。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Determination of suitable distance between methane drainage stations in Tabas mechanized coal mine (Iran) based on theoretical calculations and field investigation
A large amount of gas is emitted during underground mining processes, so mining productivity decreases and safety risks increase. Efficient methane drainage from the coal seam and surrounding rocks in underground mines not only improves safety but also leads to higher productivity. Methane drainage must be performed when the ventilation air cannot dilute the methane emissions in the mine to a level below the allowed limits. The cross-measure borehole method is one of the methane drainage methods that involves drilling boreholes from the tailgate roadway to an un-stressed zone in the roof or floor stratum of a mined seam. This is the main method used in Tabas coal mine N 1. One of the effective parameters in this method is the distance between methane drainage stations, which has a direct effect on the length of boreholes required for drainage. This study was based on the measurement of ventilation air methane by methane sensors and anemometers placed at the longwall panel as well as measuring the amount of methane drainage. Moreover, in this study, the obtained and analyzed data were used to determine the suitable distance between methane drainage stations based on the cross-measure borehole method. In a field test, three borehole arrangements with different station distances in Panel E4 of Tabas coal mine N 1 were investigated. Then, the amounts of gas drained from these arrangements were compared with each other. The highest methane drainage efficiency was achieved for distances in the range of 9-12 m between methane drainage stations.
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来源期刊
Journal of Mining Institute
Journal of Mining Institute MINING & MINERAL PROCESSING-
CiteScore
7.50
自引率
25.00%
发文量
62
审稿时长
8 weeks
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