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Relationship between rock uniaxial compressive strength and digital core drilling parameters and its forecast method
International Journal of Coal Science & Technology Pub Date : 2021-01-03 , DOI: 10.1007/s40789-020-00383-4
Hongke Gao , Qi Wang , Bei Jiang , Peng Zhang , Zhenhua Jiang , Yue Wang

The rock uniaxial compressive strength (UCS) is the basic parameter for support designs in underground engineering. In particular, the rock UCS should be obtained rapidly for underground engineering with complex geological conditions, such as soft rock, fracture areas, and high stress, to adjust the excavation and support plan and ensure construction safety. To solve the problem of obtaining real-time rock UCS at engineering sites, a rock UCS forecast idea is proposed using digital core drilling. The digital core drilling tests and uniaxial compression tests are performed based on the developed rock mass digital drilling system. The results indicate that the drilling parameters are highly responsive to the rock UCS. Based on the cutting and fracture characteristics of the rock digital core drilling, the mechanical analysis of rock cutting provides the digital core drilling strength, and a quantitative relationship model (CDP-UCS model) for the digital core drilling parameters and rock UCS is established. Thus, the digital core drilling-based rock UCS forecast method is proposed to provide a theoretical basis for continuous and quick testing of the surrounding rock UCS.



中文翻译:

岩石单轴抗压强度与数字岩心钻进参数的关系及其预测方法

岩石单轴抗压强度(UCS)是地下工程中支护设计的基本参数。特别是,对于具有复杂地质条件(例如软岩,裂缝区域和高应力)的地下工程,应迅速获得UCS岩石,以调整开挖和支护计划并确保施工安全。为解决在工程现场获取实时岩石UCS的问题,提出了一种利用数字岩心钻探进行岩石UCS预测的思路。数字岩心钻探测试和单轴压缩测试是基于已开发的岩体数字钻探系统进行的。结果表明,钻井参数对岩石UCS具有高度的响应性。根据岩心数字岩心钻削的断裂特征,岩石切削的力学分析提供了数字岩心钻进强度,并建立了数字岩心钻进参数与岩石UCS的定量关系模型(CDP-UCS模型)。因此,提出了一种基于数字岩心钻探的岩石UCS预报方法,为连续快速检测围岩UCS提供理论依据。

更新日期:2021-01-03
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