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通过理论分析,假定钻孔孔壁瓦斯流入的3种形式,建立简单的数学模型,得出了顺层瓦斯抽采钻孔内负压分布的规律,推导出顺层瓦斯抽采钻孔的极限长度并进行了实例的计算。针对传统抽采方法,结合瓦斯抽采钻孔内负压分布规律提出了改进的建议并进行比较,阐述了新式抽采方法的优越性。
Through theoretical analysis, we assume three kinds of gas influx in the borehole wall and establish a simple mathematical model to get the law of the negative pressure distribution in the gas drainage borehole, and deduce the limit of gas drainage borehole Length and the calculation of the examples. In view of the traditional method of extraction, combined with the distribution of negative pressure in gas drainage borehole, some suggestions for improvement are proposed and compared, and the superiority of the new method is expounded.