手法を比較

	Hoek-Brown Failure Criterion	ロックマス・レーティング（RMR）
分野	鉱山工学	鉱山工学
系統	Process / pipeline	Process / pipeline
提唱年	1980	1973
提唱者	Evert Hoek and E. T. Brown	Zbigniew T. Bieniawski
種類	Empirical criterion for rock mass strength prediction	Empirical classification for geotechnical engineering
原典	Hoek, E., & Brown, E. T. (2002). The Hoek-Brown failure criterion and GSI: 2018 update. Journal of Rock Mechanics and Geotechnical Engineering, 10(2), 445-463.	Bieniawski, Z. T. (1989). Engineering rock mass classifications. John Wiley & Sons. ISBN: 978-0-471-60437-4
別名	Generalized Hoek-Brown Criterion, HB Criterion	RMR, Bieniawski Classification, RMR89
関連	3	3
概要	The Hoek-Brown Criterion, developed by Evert Hoek and E. T. Brown starting in 1980, is an empirical failure criterion that predicts the shear strength of rock masses as a function of confining pressure. It accounts for rock quality (via the Geological Strength Index, GSI) and thus bridges laboratory rock mechanics and field behavior. The criterion is widely used in mining for slope stability, pillar design, and stress analysis.	The Rock Mass Rating (RMR) system, developed by Zbigniew Bieniawski starting in 1973, is an empirical classification that characterizes rock mass quality and estimates mining and civil engineering behavior. RMR combines five measurable geotechnical parameters into a single index ranging from 0 to 100, where higher values indicate stronger, more stable rock masses. It is the most widely used rock classification system worldwide for underground mining design.