Table 3   Correlation between Schmidt Hammer hardness with uniaxial compressive
strength (UCS) and Young's modulus (E)			
Equation		Researcher	Lit ho logy
UCS			
UCS = 6,9 x- LQflunmyY+ojfc]	0.94	Deere and Miller (1966)	varied
UCS = 6,9 X lQ[L.:n*i°eWYi-J.325]	-	Aijfmijth(L973)	varied
UCS = Q,447exp[G,G45(Af + 3.5) + y]	-	Kidybinski (1980)	coal, shale,
			mud stone
UCS = 2N	0.72	Singh et al. (1933)	sandstone,
			silts tone
UCS = 0,4NLM-3.6	0.94	Sheoreyettrf. (1984)	coal
UCS = 0.994N-0.383	0.70	Haramyand De Marco (1985)	coal
UCS = Q.88W-L2.H	0.87	Chose and Chakraborti (1986)	coal
UCS = 702AM104	0 77	0'Rourke(1989)	sandstone
UCS = 4,3 x IO-2(/Vyd) + 1.2	-	Cargill and Shakoor (1990)	carbonates,
			sandstones
UCS = 1.8 ^ iO-HNyd) + 2.9	-	Cargill and Shakoor (1990)	carbonates
UCS = 2.208e°>«™	0.96	Katzera/. (2000)	limestone,
			sandstone
UCS = exp(0.818 + 0.059/V)	0.93	Yilrnaz and Sendir (2002)	gypsum
UCS = 2.75N-36.83	-	Dincer et at. (2004)	ande sites.
			basalts, tuffs
UCS = 2.22W-47.67 r	-	Aggistaliseta/. (1996)	gabbros. basalts
c E = 6.95^-1.14 x 10'	0.83	Deere and Miller (1966)	varied
E =6.9 x- lON.MiosWfl+i.ffi]	-	Aufmuth(L973)	varied
£ = 0.000	0.99	Katzera/. (2000)	syenite, granite
e = exp<l.[46 + 0.054N)	0.91	Yilrnaz and Sendir (2002)	gypsum
UCS = uniaxial c^rinpre^ive strength (MPa), E: Youngs modulus (MPa).jV Schmidt Hammer rebound number, y. rock density [g/crn3). Source: From ^fasar and Erdog.an (2004): Table I, with additions