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

doi:10.12068/j.issn.1005-3026.2023.08.014

Abstract

Abstract: 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 (F_e)， the slope of torque and cutting depth (T_e)， 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 F_e and T_e can characterize rock drillability and mechanical specific energy， respectively， a model was developed to estimate rock UCS by F_e and T_e. 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.

Key words: measurement while drilling (MWD)； rock drillability； mechanical specific energy； rock strength； drilling parameters

CLC Number:

TU45

WANG Yu-heng， YU Qing-lei， NIU Peng， LI You. Uniaxial Compressive Strength Model of Rock Using Measurement While Drilling (MWD) Data[J]. Journal of Northeastern University(Natural Science), 2023, 44(8): 1168-1176.

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