底板装药爆破在煤层增透中的应用

发布时间：2018-04-30 08:31

本文选题：低透气高瓦斯煤层 + 增透　；参考：《安徽理工大学》2015年硕士论文

【摘要】：我国是能源消耗大国,其中煤炭在能源结构中占有很大部分,随着煤炭开采深度的增加,特别是两淮地区煤矿开采深度的逐渐增加,其埋深与透气性成反比,导致煤层开采过程中的瓦斯突出危险性加大。如何消除煤与瓦斯突出已成为了一项重要的研究课题。近年来,深孔预裂爆破在煤与瓦斯突出危险煤层增透中进行了推广应用,如煤层顺层增透、井筒揭煤等,但在穿层增透爆破装药位置对煤层增透效果的影响,还没有进行深入研究。本文通过实验室实验、数值模拟与现场试验相结合,分别对煤层以及煤层底板装药对煤层透气性进行了分析。结果表明,在煤层中装药,爆破扰动半径较小,增透持续时间较短,且装药困难；在煤层底板中装药,由于煤层底板岩层钻孔成孔性好,装药方便,爆破扰动半径较大,且底板岩石裂缝不易闭合,在煤岩界面的裂缝相互贯通,增透持续时间较长。本课题对低透气高瓦斯煤层增透的装药设计具有一定的指导意义。
[Abstract]:China is a big energy consumption country, in which coal occupies a large part of the energy structure. With the increase of coal mining depth, especially in the two Huai area, the depth of coal mining is increasing gradually. The depth of the coal mining is inversely proportional to the permeability, which leads to the increase of the gas outburst danger in the coal mining process. How to eliminate coal and gas outburst has become a new problem. In recent years, deep hole pre splitting blasting has been popularized in the penetration of coal and gas outburst dangerous coal seam, such as coal seam penetration and wellbore uncovering, but there is no deep study on the effect of loading position on the effect of coal seam penetration.
In this paper, through laboratory experiments, numerical simulation and field test, the permeability of coal seam and coal seam floor charge is analyzed respectively. The results show that in coal seam loading, the radius of blasting disturbance is small, the duration of penetration is short, and the loading is difficult. It has good properties, convenient loading, large radius of blasting disturbance, and not easy to close the rock cracks in the floor. The cracks in the coal and rock interface are interconnected and the penetration duration is longer. This subject has a certain guiding significance for the design of high permeability and high gas coal seams.

【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD823.82;TD235

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