Laserfiche WebLink
Geotechnical Stability Exhibit <br /> Engineering Evaluation of Highwall Design for the South Quarry of the Morrison Quarry <br /> 5.2.1.3 Design Material Constant and Disturbance Factor <br /> A design mi value of 28 was selected for competent material, in line with typical gneiss mi values <br /> per the chart referenced as Figure 5. A design value of 23 was selected for the talc-gneiss, <br /> reduced by 5 as suggested by the chart referenced as Figure 5. Due to typical blasting <br /> methodologies performed by Holcim within the South Quarry, a disturbance factor of 1.0 was <br /> utilized as suggested by the chart referenced as Figure 4. <br /> 5.2.2 Kinematic Analyses <br /> Joint and foliation data utilized for kinematic analyses of the South Quarry included data <br /> compiled from HDR field investigations to support the annual Morrison Quarry Geotechnical <br /> Addendum of 2021, digital data extracted from high density point clouds collected by HDR for <br /> the annual Morrison Quarry Geotechnical Addendum of 2022, and down-hole geophysics data <br /> collected during the HDR field investigation of 2022. The summation of this joint and foliation <br /> data is summarized and categorized into 9 discontinuity sets as shown in Figure 10 below. <br /> Disc.set 9 Disc-Set 718 <br /> Geophysics <br /> ' a z ,oa <br /> • s as <br /> • o la <br /> ' Disc.Set 6 e 7 Gomputer <br /> ' p9 a nVlly 56, 1 Generated <br /> ' DseNnuilyS°? 1 Distribution <br /> ° Lreccn r'ully sell <br /> 0 , of Joint <br /> ° e astantruiLysela 1 <br /> 0 o a SBts <br /> ° nletvrt-ally SelS 1 <br /> a - Distant nuily Se16 1 <br /> Ju °° clam[-oily S T 1 <br /> e $ e <br /> piscunt nuiLy 3e16 1 <br /> • > oab o 0 S 01a 4-Wly 8e19 1 <br /> � ° n fo ialiun 196 <br /> bo /�Ly', a°o n° v Jai9l9 � Historic Data <br /> p°•4 v O P b k ve�� L G JNnL3 � <br /> b v �qt ° JeirLl 1] <br /> Joi,LS 19 <br /> wv <br /> O o °° Lxwr °e-lycw�wraeiene <br /> Disc-Set <br /> p 1.so 2.70 <br /> G° 2.T0 0.11 <br /> 3.So .Sq <br /> ' ° 4.W - SAo <br /> Disc.Set 3 <br /> c°g° <br /> v 7.20 8.10 <br /> &MMM <br /> *.10 9.00 <br /> disc-Set r] tvnav°ele weveuvre <br /> 16xYnum Maay B,9'a <br /> Disc.Set 2 <br /> Cenmvr DGi4ibilm FisAn <br /> tantl�Crda Slap 1g5y <br /> Pov[Nvdv Porl— <br /> VecEOF(auM 589f�a Enlneel <br /> Hmtlaphem Laver <br /> Note: Folialion onentalion is highly Yaliable and a0Cnr3 at all dip and dip diFeCkn �Jaai n Egoel°ry1e <br /> Morrison Quarry <br /> __J ro c s c i e n c _ Stereo-nets an md IOn a6m <br /> wNe FOR <br /> °"° 12/13/2022,5:57:59 PM ­ Stereonets_PJI-Data.dips8 <br /> Figure 10: Distribution of Discontinuity Sets and Foliations at Morrison Quarry <br /> Kinematic analysis was performed with the RocScience DIPS program and is reliant on slope <br /> dip, dip direction, and the Mohr-Coulomb friction angle of the rock. Historic and recent <br /> May 2023 1 24 <br />