MWD Data: How the .BOR Format Facilitates Data Interoperability-PPT Presentation

PPT Presentation

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The study evaluates whether measurements collected during laboratory coring can estimate the unconfined compressive strength (UCS) of gypsum, offering a potentially faster alternative to costly, time-consuming testing at discrete locations.<br /><br />Researchers equipped a laboratory rock-core drill with strain gauges to measure thrust and torque, a string potentiometer to calculate penetration rate, and a Hall-effect sensor to measure rotational speed. The sensors were calibrated, and the system recorded drilling data in real time. From these measurements, the team calculated two compound parameters: specific energy and drillability. Gypsum cores were then prepared and tested for UCS under dry and saturated conditions.<br /><br />Both specific energy and drillability showed strong linear correlations with UCS in both moisture conditions, with correlation coefficients (R) ranging from 0.83 to 0.96. Specific energy produced slightly stronger correlations than drillability. The results indicate that measurements gathered during laboratory coring may be useful for estimating gypsum strength under dry and saturated conditions.

Keywords

gypsum

unconfined compressive strength

laboratory coring

specific energy

drillability

rock core drilling

thrust and torque

moisture conditions

saturated gypsum

strength estimation