เปรียบเทียบวิธี

	ระบบ Q	Rock Mass Rating (RMR)
สาขาวิชา	วิศวกรรมเหมืองแร่	วิศวกรรมเหมืองแร่
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1974	1973
ผู้ริเริ่ม	Nick Barton (Norwegian Geotechnical Institute)	Zbigniew T. Bieniawski
ประเภท	Empirical index for tunnel support and stability prediction	Empirical classification for geotechnical engineering
แหล่งต้นตำรับ	Barton, N., Lien, R., & Lunde, J. (1974). Engineering classification of rock masses for the design of tunnel support. Rock Mechanics, 6(4), 189-236.	Bieniawski, Z. T. (1989). Engineering rock mass classifications. John Wiley & Sons. ISBN: 978-0-471-60437-4
ชื่อเรียกอื่น	Q Index, Norwegian Geotechnical Institute Classification, Barton System	RMR, Bieniawski Classification, RMR89
ที่เกี่ยวข้อง	3	3
สรุป	The Q-System (NGI Index), introduced by Nick Barton and colleagues at the Norwegian Geotechnical Institute in 1974, is an alternative rock mass classification to RMR. It combines six parameters into a dimensionless index Q ranging from 0.001 to 1000, where higher Q values indicate better rock quality. The Q-System is particularly valued for tunnel and underground excavation design due to its explicit consideration of joint roughness and groundwater effects.	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.