摘要
从钻孔失稳、泥岩水化学作用等方面阐述了钻孔的堵塌孔机理，提出了水射流修复已有抽采钻孔的技术思路，并配套研发了瓦斯抽采孔水力作业机，形成了瓦斯抽采钻孔修复作业体系，实现了对已有抽采钻孔的修复和维护，解决了以往钻孔寿命短、补打钻孔工程量大、时间紧等问题，提高了钻孔的使用效率。通过在焦作煤业集团新河矿井的试验研究表明，使用抽采钻孔修复技术可将瓦斯抽采钻孔的有效寿命延长0．5～1倍，已堵塌抽采钻孔修复成功率达80％以上，单孔抽采纯量提高60％以上。
From borehole unstability and chemical action of mudstone water, the mechanism of plugging collapsed boreholes was described, and the technique of restorating boreholes by wa- ter jet was proposed. Furthermore, the hydraulic machine was developed for gas drainage bore- holes and the restorating operation system for gas drainage boreholes was formed, achieving the restoration and maintenance of existing boreholes. Thus the previous problems, including short life of borehole, large engineering quantity and tight schedule, were solved, and the service effi- ciency of boreholes was enhanced. The application to Xinhe Mine of Jiaozuo Coal Industry Group showed that this technique could prolong the actual life of boreholes 0.5 - 1 times, the success rate of restoration of collapsed boreholes was up to over 80 0%, and the amount of drained gas in single borehole was increased by 60 %.
出处
《中国煤炭》
北大核心
2014年第1期102-105,共4页
China Coal
基金
河南省教育厅科学技术研究重点项目(13A440320)
煤层气资源与成藏过程教育部重点实验室(中国矿业大学)开放基金资助项目(2013-003)
关键词
钻孔修复
瓦斯抽采
失稳
水射流
抽采模式修复效果
borehole restoration, gas drainage, unstability, water jet, gas drainage mode, restoration effect
