The constant m_i in the Hoek-Brown (H-B) criterion is a fundamental parameter required for determining the compressive strength of rock. In this paper, drilling parameters provide a new basis for determining the constant m_i. An analytical relationship between the drilling parameters and constant m_i is established in consideration of the contact response between the drilling bit and the cut rock in the crushed zone. New models are developed to predict the triaxial compressive strength (TCS), internal friction angle φ and cohesion c of rock. Drilling tests are carried out on 6 rock types to study the correlation between φ and m_i. A comparison between the predicted values of rock mechanical properties and the measured values from the laboratory is performed to verify the accuracy of the proposed model (yielding an error less than 10%). The TCSs and constant m_i values of fifteen rocks are cited to validate the accuracy of the proposed model. The result shows that the proposed model predicts the TCS and constant m_i within a maximum error of 20%. The method can be conveniently applied to the rock mechanical properties.

Hoek-Brown (HB) 准则中的常数m _i是确定岩石抗压强度所需的基本参数。在本文中，钻井参数为确定常数m _i提供了新的依据。考虑到破碎区钻头与切岩的接触响应，建立了钻井参数与常数m _i之间的解析关系。开发了新的模型来预测岩石的三轴抗压强度 ( TCS )、内摩擦角φ和内聚力c。对 6 种岩石类型进行钻孔试验，研究φ之间的相关性和我。_{_} 将岩石力学性能预测值与实验室实测值进行比较，以验证所提出模型的准确性（误差小于10%）。引用十五块岩石的TCS s 和常数m _i值来验证所提出模型的准确性。结果表明，所提出的模型在最大误差为 20% 的范围内预测了TCS和常数m _{i 。}该方法可以方便地应用于岩石力学性质。