Drilling-based measuring method for the c-ψ parameter of rock and its field application

Bei Jiang ¹Fenglin Ma ²Qi Wang ³Hongke Gao ²Dahu Zhai ²Yusong Deng ²Chuanjie Xu ²Liangdi Yao²

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作者信息

1. State Key Laboratory for Tunnel Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Research Center of Geotechnical and Structural Engineering,Shandong University,Jinan 250061,China
2. State Key Laboratory for Tunnel Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China
3. State Key Laboratory for Tunnel Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;Research Center of Geotechnical and Structural Engineering,Shandong University,Jinan 250061,China
折叠

Abstract

The technology of drilling tests makes it possible to obtain the strength parameter of rock accurately in situ.In this paper,a new rock cutting analysis model that considers the influence of the rock crushing zone(RCZ)is built.The formula for an ultimate cutting force is established based on the limit equilibrium principle.The relationship between digital drilling parameters(DDP)and the c-ψ parameter(DDP-cψ for-mula,where c refers to the cohesion and ψ refers to the internal friction angle)is derived,and the response of drilling parameters and cutting ratio to the strength parameters is analyzed.The drilling-based measuring method for the c-ψ parameter of rock is constructed.The laboratory verification test is then completed,and the difference in results between the drilling test and the compression test is less than 6％.On this basis,in-situ rock drilling tests in a traffic tunnel and a coal mine roadway are carried out,and the strength parameters of the surrounding rock are effectively tested.The average difference ratio of the results is less than 11％,which verifies the effectiveness of the proposed method for obtaining the strength parameters based on digital drilling.This study provides methodological support for field testing of rock strength parameters.

Key words

Digital drilling/Rock crushing zone/c-ψ parameter/Measurement method/Field application

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基金项目

National Key Research and Development Program of China(2023YFC2907600)

National Natural Science Foundation of China(42077267)

National Natural Science Foundation of China(42277174)

National Natural Science Foundation of China(52074164)

Natural Science Foundation of Shandong Province,China(ZR2020JQ23)

Opening Project of State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology(KFJJ21-02Z)

Fundamental Research Funds for the Central Universities,China(2022JCCXSB03)

出版年

2024

矿业科学技术学报(英文版)

中国矿业大学

矿业科学技术学报(英文版)

CSTPCDCSCDEI

影响因子：1.222

ISSN：2095-2686

被引量1

参考文献量45

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