基于切削理论的数字钻探参数与岩石单轴抗压强度关系研究  

Research of relationship between digital drilling parameters and rock uniaxial compressive strength based on cutting theory

作　　者：江贝[1] 马凤林 王琦[1,2] 刘悦[2,3] 李术才 何满潮[1] 魏华勇[1] JIANG Bei;MA Fenglin;WANG Qi;LIU Yue;LI Shucai;HE Manchao;WEI Huayong(State Key Laboratory for Geo-mechanics and Deep Underground Engineering,China University of Mining&Technology(Beijing),Beijing 100083,China;Research Center of Geotechnical and Structural Engineering,Shandong University,Jinan 250061,China;Shandong Hi-Speed Group Co.Ltd.,Jinan 250100,China)

机构地区：[1]中国矿业大学(北京)深部岩土力学与地下工程国家重点实验室,北京100083 [2]山东大学岩土与结构工程研究中心,山东济南250061 [3]山东高速集团有限公司,山东济南250100

出　　处：《中南大学学报（自然科学版）》2021年第5期1601-1609,共9页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(42077267,52074164,51874188);国家重大科研仪器研制项目(51927807);山东省重大科技创新工程项目(2019SDZY04);山东省高等学校青创科技支持计划项目(2019KJG013)。

摘　　要：为实现岩石力学参数的现场实时测试,利用数字钻探技术准确获取岩石单轴抗压强度,考虑钻进过程中岩石碎屑对切削荷载的影响,建立基于岩石碎屑区的切削力学模型。基于该模型得到数字钻探参数与碎屑区边界压力(碎屑压力)的关系式,结合数字钻探试验结果建立数字钻探参数与岩石单轴抗压强度关系模型(DP-σ_(c)模型),将该模型应用于岩石单轴抗压强度的随钻测试,并验证基于DP-σ_(c)模型实时获取岩石单轴抗压强度的有效性。研究结果表明:通过随钻测试反演得到的岩石单轴抗压强度与室内单轴压缩试验结果差异率平均值小于5%,建立的DP-σ_(c)模型应用于岩石单轴抗压强度的随钻测试是合理、有效的。In order to realize the real-time testing of rock mechanics parameters and accurately obtain rock uniaxial compressive strength by using digital drilling technology,the cutting mechanics model based on rock crushing zone was established,considering the influence of rock crushing zone on cutting load during drilling.The relationship between digital drilling parameters and rock crushing zone boundary pressure(crushing pressure)was obtained.Combined with the digital drilling test results,the relationship model of digital drilling parameters and rock uniaxial compressive strength(DP−σ_(c) model)was obtained,which was applied to the drilling measurement of rock uniaxial compressive strength.Based on this,the validity of drilling measurement of rock uniaxial compressive strength based on DP−σ_(c) model was verified.The results show that the average difference rate of rock uniaxial compressive strength obtained by drilling test and uniaxial compression test is less than 5%.The DP−σ_(c) model is effective and reasonable when it is applied in the drilling measurement of rock uniaxial compressive strength.

关 键 词：钻探参数 岩石碎屑区 碎屑压力 单轴抗压强度 随钻测试 

分 类 号：TU45[建筑科学—岩土工程]