水力冲孔布孔参数对高瓦斯突出煤层卸压效果影响的研究
投稿时间:2017-12-18  修订日期:2018-03-29  点此下载全文
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作者单位E-mail
段守德 平顶山天安煤业股份有限公司八矿 dsd924488536@126.com 
宋浩然 中国矿业大学 414708634@QQ.COM 
杨威 中国矿业大学安全学院  
中文摘要:水力冲孔的影响范围决定着钻孔的布置,合理的布置钻孔能够显著的提升煤层渗透率,增进瓦斯高效抽采,因此探究冲孔的影响范围非常重要。文章以平顶山八矿己15煤层为试验对象,先介绍了高压水力冲孔设备,并通过Flac3D软件进行模拟,比较了不同冲孔出煤量条件下的卸压效果和钻孔之间的相互作用,其模拟数据与现场试验结果相互验证。结果表明:钻孔直径,钻孔间距影响四周煤体的卸荷情况,煤孔的孔间距理论上在5m左右,出煤量的最优范围在0.37~1t/m之间,本文的研究结果可指导钻孔的排布位置,同时为水力冲孔的工程运用提供了技术借鉴。
中文关键词:煤与瓦斯突出  水力冲孔  卸压  出煤量  瓦斯抽采
 
Effect of Hydraulic Punching Pore Parameters on Pressure Relief of High Gas Outburst Coal Seam
Abstract:The range of influence of hydraulic punching determines the arrangement of drilling holes. The rationality of layout drilling can significantly improve coal seam permeability. Therefore, it is very important to explore the impact range of punching. In this paper, the 15th coal seam of Pingdingshan No. 8 Mine was taken as the test object. Firstly, the high-pressure hydraulic punching equipment was introduced and simulated by Flac3D software. The pressure relief effect and the interaction between boreholes under different punching coal output were compared. The simulation data and field test results verified each other. The results show that the borehole diameter and borehole spacing affect the unloading conditions of the surrounding coal. The hole spacing of the coal holes is theoretically about 5 m, and the optimal range of coal output is 0.37~1 t/m. This research result can provide technical reference for drilling arrangement and hydraulic punching engineering application.
keywords:coal and gas outburst  hydraulic punching  pressure relief  coal output  gas extraction
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