首页|基于冲击回转钻进的岩石强度随钻识别研究

基于冲击回转钻进的岩石强度随钻识别研究

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  • 国家科技期刊平台
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在隧道掘进施工过程中,数字化钻孔过程监测(drilling process monitoring,简称DPM)系统能够实时快速地获取岩石强度参数,及时指导现场开挖和支护作业.为实时获取隧道开挖掌子面前方的围岩强度,基于搭载于气动冲击回转钻机上的数字化DPM系统地开展现场原位数字钻进试验.通过对钻孔全过程的推进压力、回转压力、冲击压力以及钻杆位移等钻进参数进行实时监测、记录和分析,得到了不同钻孔过程的钻进参数特征,据此对各钻孔过程进行识别,并采用DPM时间序列分析方法分离出纯钻进过程钻进参数,结果表明:纯钻进过程的钻进深度随钻进时间呈分段线性变化;钻机工作压力随钻进时间的变化相对恒定,其对不同钻速段的钻速变化影响有限;同时,钻进速度随岩石强度增加而减小,并建立了岩石强度关于钻进速度的指数关系模型,用以指导工程实践.
Rock strength identification while drilling based on percussive rotary drilling
During tunnel excavation,the digital drilling process monitoring(DPM)system can quickly obtain rock strength parameters in real time,and guide on-site excavation and support operations in a timely manner.In order to obtain the surrounding rock strength in front of the tunnel face in real time,this study carried out the in situ digital drilling tests based on the digital drilling process monitoring(DPM)system mounted on the pneumatic percussion rotary drilling rig.Through the real-time monitoring,recording and analysis of the drilling parameters such as propulsion pressure,rotary pressure,impact pressure and drill pipe displacement in the whole drilling process,the characteristics of the drilling parameters in different drilling processes are obtained.On this basis,each drilling process is identified,and the drilling parameters of the pure drilling process are separated by using the DPM time series analysis method.The results show that the drilling depth of the pure drilling process changes linearly with the drilling time.The variation of working pressure of the drilling rig with the drilling time is relatively constant,and it has limited influence on the rate of penetration in different rate-of-penetration sections.Meanwhile,the rate of penetration decreases with the increase in rock strength,and an exponential relationship model between rock strength and rate of penetration is established to guide engineering practice.

percussive rotary drillingdrilling process monitoringdrilling parameterssaturated uniaxial compressive strength

刘勇斌、张晓平、李馨芳、李德宏、陈广军、刘小波、熊雪飞、杨朗、李玉生

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武汉大学土木建筑工程学院,湖北武汉 430072

中国铁建昆仑投资集团有限公司,四川成都 610040

四川蜀道高速公路集团有限公司,四川成都 610094

四川川黔高速公路有限公司,四川成都 646500

江西省交通投资集团有限责任公司,江西南昌 330025

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冲击回转 钻孔过程监测 钻进参数 饱和单轴抗压强度

中国铁建昆仑投资集团有限公司科技研发计划湖北省重点研发计划国家自然科学基金面上项目陕西省自然科学基础研究计划-引汉济渭联合基金

KLTZ-KX01-2020-0082021BCA154422771602021JLM-48

2024

10.16285/j.rsm.2023.0351

岩土力学
中国科学院武汉岩土力学研究所

岩土力学

CSTPCD北大核心
影响因子：1.614
ISSN：1000-7598
年,卷(期)：2024.45(3)
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