基于随钻参数的岩石单轴抗压强度表征模型研究  

Uniaxial Compressive Strength Model of Rock Using Measurement While Drilling(MWD)Data

作　　者：王宇恒 于庆磊[1] 牛鹏 李友 WANG Yu-heng;YU Qing-lei;NIU Peng;LI You(School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China)

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819

出　　处：《东北大学学报（自然科学版）》2023年第8期1168-1176,共9页Journal of Northeastern University(Natural Science)

基　　金：国家自然科学基金联合基金资助项目(U21A20106);国家自然科学基金资助项目(52074060);中央高校基本科研业务费专项资金资助项目(N2101036).

摘　　要：凿岩过程中钻机工作参数的变化响应与岩石单轴抗压强度密切相关,为利用随钻响应快速表征岩石力学性质,使用自主搭建的随钻获取试验平台,选取了4种岩石,开展了一系列不同推力条件下的钻进试验,研究岩石单轴抗压强度与钻机工作参数之间的相关性.研究结果发现,推力随切削深度的变化率Fe、扭矩随切削深度的变化率Te、钻头单位尺寸上法向力与切向力之比ζ与岩石单轴抗压强度正相关,且不受试验条件影响.在此基础上,基于随钻参数Fe和Te是可以表征可钻性和机械比能的物理量,结合量纲分析,建立了以Fe和Te为参数的岩石单轴抗压强度表征模型,并通过其他种类岩石的钻进数据初步验证了该模型的可靠性.为利用凿岩过程快速表征岩石单轴抗压强度提供了一种新方法.The uniaxial compressive strength(UCS)of rock is an important factor in drilling and blasting operations,and it is closely related to measurement while drilling(MWD)data.A series of rock drilling tests were carried out under different thrusts using a self-built MWD test platform to investigate the correlation between UCS and MWD data.The results show that slope of thrust and cutting depth(Fe),the slope of torque and cutting depth(Te),and the ratio of normal force to tangential force per unit size of bit(ζ)are positively correlated with rock UCS and not affected by test conditions.Based on the fact that Fe and Te can characterize rock drillability and mechanical specific energy,respectively,a model was developed to estimate rock UCS by Fe and Te.Additionally,the validity of the model was preliminarily verified using a different type of rock.The research provids a new method for estimating rock UCS during drilling process.

关 键 词：随钻获取 岩石可钻性 机械比能 岩石强度 钻进参数 

分 类 号：TU45[建筑科学—岩土工程]