基于时空属性的黄陵矿区瓦斯精准化预抽实践

Practices on precision gas pre-drainage based on time-space attribute in Huangling Mining Area

为了实现黄陵矿区井下瓦斯精准化预抽,在综合分析煤矿瓦斯含量分布规律、有效抽采半径与抽采时间关系、以及"采-掘-抽"衔接关系基础上,从时空的角度提出了一种预抽钻孔进行分区段布置的煤矿井下瓦斯精准化预抽方法,并在黄陵矿区二号矿207综采工作面进行了现场验证试验。试验结果表明,该方法提出的钻孔分区布置方案可有效解决瓦斯抽采空白带和抽采达标问题,且明显优于统一钻孔间距6 m和12 m两种方案,较2种方案可分别节约预抽时间36、146 d,有效缓解"采-掘-抽"工程衔接不平衡,经济效益显著,实现了煤矿井下瓦斯的精准化预抽。

In order to realize a precision gas pre-drainage in Huangling Mining Area,based on the comprehensive analysis on the coal mine gas content distribution law,the relationship between the effective gas drainage radius and the gas drainage time as well as the＂mining-excavation-drainage＂connection relationship,from a view of the time and space,a pre-gas drainage borehole was provided to the precision gas pre-drainage method in a underground coal mine with sectional layout. A site demonstration test was conducted on No. 207 fully-mechanized coal mining face in No. 2 Mine of Huangling Mining Area. The test results showed that the borehole sectional layout plan of the method provided could effectively solve the blank zone of the gas drainage and the gas drainage to reach the target. This sectional layout plan was obviously better than two plans with the general borehole spacing of 6 m and 12 m individually. In comparison with the two plans,the sectional layout plan could individually save the gas pre-drainage time of 36 days and 146 days and could effectively release the connection unbalanced of the＂mining-excavation-drainage＂.The economic benefits of the sectional layout plan was obvious and the precision gas pre-drainage in the underground mine was realized.