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江西省涌山桥矿区煤变质程度对煤层瓦斯的影响
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摘要
瓦斯是在煤变质过程中生成的气体,它储存于煤层和围岩中,易燃易爆、无色无味,是煤矿生产和工人生命安全的最大威胁。当前,随着煤矿产量提高、采深加大,瓦斯灾害的威胁也越来越大。江西省涌山桥矿区是瓦斯灾害最为严重的矿区之一,但有关瓦斯方面的研究却十分薄弱。
     本文通过大量收集矿区内仙槎矿、沿沟矿、涌山矿的勘探钻孔资料及煤层瓦斯资料,利用矿山统计法研究矿区煤变质程度的分布趋势:并利用回归分析将煤的挥发分与瓦斯含量建立联系,研究该矿区煤变质程度对煤层瓦斯的影响;最后针对矿区煤变质作用的主要类型进行探讨。
     本次研究基于瓦斯地质理论、区域构造演化理论、构造逐级控制理论等,利用矿山统计法、线性回归分析方法进行研究涌山桥矿区煤变质程度对煤层瓦斯的影响,研究结果表明:
     1、涌山桥矿区煤变质程度具有分带性。在横向上,矿区由东至西,煤变质程度逐渐增高;在纵向上,随着煤层埋深的增加,煤变质程度亦增高。
     2、在煤层埋深相同的前提下,煤的挥发分与瓦斯含量存在负相关关系,挥发分值越低瓦斯含量越高,即瓦斯含量随着煤变质程度的增高而增大。
     3、影响涌山桥矿区煤变质程度的主要变质作用类型是岩浆热变质作用,并根据矿区煤变质程度分带性的趋势,预测矿区外围西部有大范围的岩浆岩体存在
     图[13]表[13]参[53]
The gas is produced in the coal metamorphism process, it stored in coal seam and surrounding rock, inflammable, explosive, colorless and odorless, it is the biggest threat to the mine production and workers'life safety. At present, as mines improve, mining depth, the threat of increased gas disasters are getting more and more serious. Yongshanqiao mining area is the most serious mine gas disasters in jiangxi province, but the research about gas is very weak.
     This article through a large collection of mining area's exploration drilling date, use mine statistics method to research mining coal metamorphism degree distribution trend; And by using regression analysis of volatile and will coal gas content to make connections, study the effect of mining area coal metamorphism degree on gas; Finally, according the coal metamorphism to discuss the main metamorphic types of mining area.
     This study based on theory of gas geology tectonic evolution theory, control theory of structure, use mine statistics, linear regression analysis method study the effect of coal metamorphism degree on gas in Yongshanqiao mining area, the research result indicates that:
     1.Yongshanqiao mining area coal metamorphism degree has zoning. In horizontally from east to west, mining coal metamorphism degree is higher; In vertical buried depth of coal seams, along with increased, coal metamorphism degree also increased.
     2.The same in coal seam under the premise of the buried depth, the Vdaf and coal gas content exists negative correlation, with the Vdaf lower, the gas content scores, namely the higher gas content with coal metamorphism degree of heighten increase.
     3. Magma metamorphism is the main effect factor of coal metamorphism degree in Yongshanqiao mining area, and according to mine coal metamorphism degree trend, predicting mining erea peripheral has widespread magmatic rock.
     Figure [13] Table [13] Reference [53]
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