Rocscience Coefficient of Restitution TableRN ( Normal)RT ( Tangential)TypeVerificationLocationMinMaxStandardMinMaxStandardMeanDeviationMeanDeviation0.3700.4200.8700.920Hard surface pav ingTested using simulatedGlen wood Canyon, Colorado, USA0.3300.3700.8300.870Bedrock or boulders with little soilrockfalls of similar size and shape of a previous rockfall.or vegetati on0.3000.3300.8300.870Talus with little vegetati on0.3000.3300.8000.830Talus with some vegetati on0.2800.3200.8000.830Soft soil slope with littlevegetati on0.2800.3200.7800.820Vegetated soil slope0.3150.0640.7120.116Limest one faceTested on restoratio n-blasti ng slopes made of four types of materials; blast-ge nerated rock fragme nts, partially vegetated scree on berms, un covered blast piles, and vegetated quarry waste.Limest one quarry in En gla nd0.3030.0800.6150.170Partially vegetated limest onescree0.3150.0640.7120.116Un covered limest one blast pile0.2510.0290.4890.141Vegetated covered limest one pile0.2760.0790.8350.087Chalk faceChalk quarry in En gla nd0.2710.0180.5960.085Vegetated chalk scree0.3840.1330.6870.130Wood platform slope at 45 degrees was used as a con trol for the field tests they did.Tested as con trol parametersWester n North Caroli na forIn terstate 40.0.2000.530Dolomitic limest one boulders on rocky surfaces and on talus despositsCon sisted of hand made throws and free fall tests by fragmentation of rock using explosives, of dolomitic limest one boulders on rocky surfaces and on talus deposit of the lan dslide fans. Also used back-a nalysis, and inf ormati on from Urciuoli.Atrani, Campania, Southern Italy0.1000.200Remolded pyroclastic from the terraces situated at the base of the cliff0.0000.240Impacts on detritus of the fans prese nt at the foot of a rock cliff0.3930.567SoilTested by dropp ing 3 to 5 cm cuboid and an gular gra nite rock fragme nts onto slopesHong Kong0.4530.737Shotcrete0.4870.910Rock slope0.5000.950BedrockRefere need from tests carried out by Barbieri et al.Italcementi works at Castellammare di Stabia(northern slope of the Sorrentine Peninsula), and the area of Atra ni.0.3500.850Bedrock covered by large blocksdi Stabia(northern slope of the Sorrentine Peninsula), and the area of Atra ni.0.3000.700Debris formed by un iformdistributed eleme nts0.2500.550Soil covered by vegetati on0.5300.990Clea n hard bedrock0.4000.900Asphalt roadway0.3500.850Bedrock outcrops with hard surface, large boulders0.3200.820Talus cover0.3200.800Talus cover with vegetati on0.3000.800Soft soil, some vegetati on0.3700.420Smooth hard surfaces and pav ingDeveloped by observati on and literature reviewColordado, USA0.3300.370Most bedrock and boulder fields0.3000.330Talus and firm soil slopes0.2800.300Soft soil slopes0.8700.920Smooth hard surfaces such aspaveme nt or smooth bedrock surfaces0.8300.870Most bedrock surfaces and talus with no vegetati on0.8200.850Most talus slopes with some lowvegetati on0.8000.830Vegetated talus slopes and soil slopes with spares vegetati on0.7800.820Brush covered soil slope0.5300.0400.9900.040Clea n Hard Bedrock0.3500.0400.8500.040Bedrock outkrop0.3200.0400.8200.040Talus cover0.3200.0400.8000.040Talus with vegetati on0.4000.0400.9000.040Asphalt pav ing0.5300.0400.9900.040Clea n Hard Bedrock0.3500.0400.8500.040Bedrock outcrop0.4800.1900.5300.170Con crete0.4700.3000.5500.230Weathered Rock0.4800.0000.5300.000Con crete0.4700.0000.5500.000Weathered Rocka) rolled many rocks down the slope toverify used values b) comparis on tohistorical rockfall eve nts at sitedefault program values usedin verse calculatio n of paths - sta ndarddeviati ons seemed to largein verse calculatio n of paths, rough nessof 7.9 degrees for con crete, 9.3 for rockMountain road, n ear Bolza no,Sothtyrol, Italy170m deep ope n pit, Tasma nia, Australia (overall pit an gle betwee n 55 and 65 degrees)Takamatsu, Japa n0.8500.0000.530