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1、Rocscience Coefficient of Restitution TableRN ( Normal )RT ( Tangential )TypeVerificationLocationMinMaxMeanStandardMinMaxMeanStandardDeviationDeviation0.3700.4200.8700.920Hard surface pavingTested using simulatedGlenwood Canyon, Colorado, USA0.3300.3700.8300.870Bedrock or boulders with little soilro
2、ckfalls of similar size and shape of a previous rockfall.or vegetation0.3000.3300.8300.870Talus with little vegetation0.3000.3300.8000.830Talus with some vegetation0.2800.3200.8000.830Soft soil slope with littlevegetation0.2800.3200.7800.820Vegetated soil slope0.3150.0640.7120.116Limestone faceTeste
3、d on restoration-blasting slopes made of four types of materials; blast-generated rock fragments, partially vegetated scree on berms, uncovered blast piles, and vegetated quarry waste.Limestone quarry in England0.3030.0800.6150.170Partially vegetated limestonescree0.3150.0640.7120.116Uncovered limes
4、tone blast pile0.2510.0290.4890.141Vegetated covered limestone pile0.2760.0790.8350.087Chalk faceChalk quarry in England0.2710.0180.5960.085Vegetated chalk scree0.3840.1330.6870.130Wood platform slope at 45 degrees was used as a control for the field tests they did.Tested as control parametersWester
5、n North Carolina forInterstate 40.0.2000.530Dolomitic limestone boulders on rocky surfaces and on talus despositsConsisted of hand made throws and free fall tests by fragmentation of rock using explosives, of dolomitic limestone boulders on rocky surfaces and on talus deposit of the landslide fans.
6、Also used back-analysis, and information 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 present at the foot of a rock cliff0.3930.567SoilTested by dropping 3 to 5 cm cuboid and
7、angular granite rock fragments onto slopesHong Kong0.4530.737Shotcrete0.4870.910Rock slope0.5000.950BedrockReferenced from tests carried out by Barbieri et al.Italcementi works at Castellammare di Stabia(northern slope of the Sorrentine Peninsula), and the area of Atrani.0.3500.850Bedrock covered by
8、 large blocksdi Stabia(northern slope of the Sorrentine Peninsula), and the area of Atrani.0.3000.700Debris formed by uniformdistributed elements0.2500.550Soil covered by vegetation0.5300.990Clean hard bedrock0.4000.900Asphalt roadway0.3500.850Bedrock outcrops with hard surface, large boulders0.3200
9、.820Talus cover0.3200.800Talus cover with vegetation0.3000.800Soft soil, some vegetation0.3700.420Smooth hard surfaces and pavingDeveloped by observation and literature reviewColordado, USA0.3300.370Most bedrock and boulder fields0.3000.330Talus and firm soil slopes0.2800.300Soft soil slopes0.8700.9
10、20Smooth hard surfaces such aspavement or smooth bedrock surfaces0.8300.870Most bedrock surfaces and talus with no vegetation0.8200.850Most talus slopes with some lowvegetation0.8000.830Vegetated talus slopes and soil slopes with spares vegetation0.7800.820Brush covered soil slope0.5300.0400.9900.04
11、0Clean Hard Bedrocka) rolled many rocks down the slope to verify used values b) comparison to historical rockfall events at siteMountain road, near Bolzano, Sothtyrol, Italy0.3500.0400.8500.040Bedrock outkrop0.3200.0400.8200.040Talus cover0.3200.0400.8000.040Talus with vegetation0.4000.0400.9000.040
12、Asphalt paving0.5300.0400.9900.040Clean Hard Bedrockdefault program values used170m deep open pit, Tasmania, Australia (overall pit angle between 55 and 65 degrees)0.3500.0400.8500.040Bedrock outcrop0.4800.1900.5300.170Concreteinverse calculation of paths - standard deviations seemed to largeTakamat
13、su, Japan0.4700.3000.5500.230Weathered Rock0.4800.0000.5300.000Concreteinverse calculation of paths, roughness of 7.9 degrees for concrete, 9.3 for rock0.4700.0000.5500.000Weathered Rock0.8500.0000.5300.000Concreteinverse calculation of paths1.0000.0000.5500.000Weathered Rock0.5300.0400.9900.040BedrockEstimation, block d
