反井钻井工艺及其关键技术研究

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英文篇名：Research on process and key technologies of raise boring 作者：刘志强 英文作者：LIU Zhiqiang;Mine Construction Branch,China Coal Research Institute;National Engineering Lab of Mine Deep Shaft Construction; 关键词：反井钻井 ; 导孔 ; 扩孔 ; 排渣 ; 钻具 ; 围岩稳定性 英文关键词：raise boring;;pilot hole;;reaming;;slagging;;drilling tools;;surrounding rock stability 中文刊名：MTKJ 英文刊名：Coal Science and Technology 机构：煤炭科学研究总院建井研究分院;煤矿深井建设国家工程实验室; 出版日期：2019-05-15 出版单位：煤炭科学技术 年：2019 期：v.47;No.534 基金：国家重点研发计划资助项目(2016YFC0600802);; 天地科技创新创业资金专项重点资助项目(2018-TD-ZD003) 语种：中文; 页：MTKJ201905002 页数：10 CN：05 ISSN：11-2402/TD 分类号：18-27

摘要

反井是地下井巷工程施工难度最大、风险最高的施工项目,在总结和分析反井钻井过程中导孔钻进和扩孔钻进的工艺流程的基础上,围绕滚刀破岩、钻孔偏斜控制、钻具受力特征、围岩稳定性控制等关键技术问题,凝练了反井钻井工艺中导孔钻进和扩孔钻进2个主要工序中的7项关键技术问题:导孔钻具受力特点及偏斜控制技术;导孔钻进洗井介质的选择及其压力、流量等参数与排渣效果之间的相互关系;导孔钻井过程中钻进参数、洗井介质、地层结构对孔帮稳定性的影响和控制技术;扩孔钻头滚刀破岩方式及滚刀布置分析;刀具作用于岩石压力的确定、压力和推进力之间的协调性、单位体积破岩能耗、刀齿的磨损与矿物成分之间的相关性等扩孔钻进参数对扩孔钻进效率的影响;扩孔过程中地层的蠕变、风化和水化、钻井直径、钻井深度和暴露时间等参数对井帮稳定性的影响及风险判识;扩孔钻进过程中钻杆连接方式、受力特点及疲劳破坏特征分析。同时,给出了由主机系统、钻具系统、冷却降尘系统和辅助系统组成的反井钻井装备及面临的问题;并介绍了反井钻井试验平台研究系统和反井钻井技术、装备和工艺的标准体系,为反井钻井的工程应用、设备制造、关键元部件的标准化提供了理论指导和技术支撑。
        The raise boring is the most difficult and risky construction project for underground shaft sinking and drifting engineering. The process flow of pilot hole drilling and reaming drilling in the raise boring drilling process is summarized and analyzed. Key technical issues such as hob rock breaking,drill hole deflection control,drilling force characteristics and surrounding rock stability control during the raise boring drilling process. The atfhor condensed the key technical problems in the seven aspects of guiding hole drilling and reaming drilling in the raise boring drilling process as followings: The stress characteristics of the pilot hole drilling tools and the technology of the deflection control; The choice of well washing medium and the relationship between pressure,flow and other parameters and slagging effect; Influence and control technology of drilling parameters,well washing medium and stratum structure on surrounding rock stability during pilot hole drilling; Analysis of rock breaking method and arrangement of hob for reaming drill hob; The influence of tool-to-rock pressure determination,coordination between pressure and propulsion,energy consumption per unit volume of rock breaking,correlation between tooth wear and mineral composition,and reaming drilling efficiency; Influence of parameters such as creep,weathering,hydration,drilling diameter,drilling depth and exposure time on well stability and risk identification; Analysis of connection mode,force characteristics and fatigue failure characteristics of drill stem during reaming drilling. Meanwhile,the raise boring drilling equipment consisting of the host system,the drilling system,the cooling & dust reduction system,the auxiliary system and the problems faced by it are given. The standard system of raise boring drilling test platform research system and raise boring drilling technology,equipment and process is introduced.This provides theoretical guidance and technical support for engineering applications,equipment manufacturing,and design of key components for raise boring drilling.

引文

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