深部煤与瓦斯共采中的优质瓦斯通道及其构建方法

发布时间：2018-02-28 20:51

本文关键词： 煤与瓦斯共采优质瓦斯通道抽采钻孔蝶形塑性区　出处：《煤炭学报》2015年04期 　论文类型：期刊论文

【摘要】：瓦斯抽采钻孔围岩的破坏形态和范围对于瓦斯通道区域的联通具有重要影响。以钻孔围岩"蝶形塑性区"理论模型为基础,对深部煤与瓦斯共采中钻孔瓦斯导向通道进行了研究,结果表明:深部环境和采矿活动引起的"加载"与"卸荷"效应,会使钻孔围岩出现有利于瓦斯导通的"蝶形塑性区",蝶叶长度可达钻孔直径的几十倍以上。以"蝶形塑性区"理论为基础,提出了优质瓦斯通道的概念:通过协调采矿工程活动与瓦斯抽采钻孔布局,形成有利于瓦斯抽采的瓦斯导通和流动网络;并确定了以构建优质瓦斯通道的应力环境,确定钻孔布置岩层层位及协调采矿活动与钻孔时空关系为主要内容的优质瓦斯通道构建方法,以实现优质瓦斯通道的高效性、稳定性、长期性,提高瓦斯抽采效率。
[Abstract]:The failure pattern and scope of surrounding rock of gas drainage borehole have an important influence on the connection of gas passage area, which is based on the theoretical model of "butterfly plastic zone" of borehole surrounding rock. The gas guiding channel of borehole in deep coal and gas mining is studied. The results show that the "loading" and "unloading" effects caused by deep environment and mining activities are discussed. The sphenoid plastic zone will appear in the surrounding rock of the borehole, and the length of the sphenoid blade can reach more than tens of times the diameter of the borehole, which is based on the theory of "sphenoid plastic zone". The concept of high quality gas passage is put forward: through the coordination of mining engineering activities and the layout of gas drainage borehole, the gas conduction and flow network is formed in favor of gas drainage, and the stress environment of high quality gas passage is determined. In order to realize the high efficiency, stability, long-term and gas drainage efficiency of the high quality gas channel, the construction method of high quality gas passage is established, which mainly includes the arrangement of rock layers and the coordination of mining activities and the space-time relationship between borehole and borehole.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;
【基金】：国家重点基础研究发展计划(973)资助项目(2011CB201204) 国家自然科学基金资助项目(51434006) 北京高等学校青年英才计划资助项目(YETP0928)
【分类号】：TD712.6

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