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i 1 <br />l.~ Moai[oriag Data <br />' The following measurements or edculations should be made for each survey reading <br />1) Dale of reading, iaeemeatal days between readings, and total number of days the survey point <br />' has been established; <br />2) Co-ordinates and elevation; <br />3) Magnitude and d'cectiaa of horizonml displacemeaG <br />4) Magnitude and plunge of vertical displacement, <br />~ Magnimdq bearing, and plunge of resuitaa[ displacement vector, and <br />' 6) Rates of horizontal, vertical, and resultant (total) displa~meau. <br /> Both inaemen[al and cumulative displacement values should be deteratiaed. Calculating he <br /> n+mulanVe dtsplammeat from mtnal values talker Klan (tom Summing inrzemeatal displacements <br /> ++++n+m+~es [he effects of occasional survey aberrarians <br /> Slope disphtcemea[s aze bes[ undetsmod and analyrld when the monitoring data aze graphimlly <br /> <br />''. displayed. For engineering purposes, the most useful plats are: <br /> 1) Horizontal position (northing vs casting); <br />' 2) Vertical posidoa (eievanoa vs change is horizontal posiuoa, platted on a section oriemed in <br /> the mean direction of horizontal duplacemen[); <br />' 3) Cumulative total displacemem vs. time, <br /> 4) Incremental total displacement rate (velodry, usually in incites/day) vs. time; and <br />' ~ Schmidt plots of total duplacemem vectors. <br /> All graphs should be kept np•to-data By studying several graphs simuitaneotuly, the movement history <br /> of a particular slope nn be determined. <br /> The veladry-verstu-time plat is osuady mastrnaed on Iog paper rather than as a linear sra;le. This <br />' allows a greater range of displacements to be plotted widwm losing precsion for small measurements. <br /> ALso, Chis type of graph is mmpanble with current monitoring tetdmiques and analyses of slope failure <br /> kiaematia (Robezrsoa,l9T!). <br />' Preapitation data should also be recorded is order to evaluate possible mrrehuions with slope <br /> displacement. A gauge lmted az the mine site cla be rued to measure ocnarences and amounts of <br /> predpitation. In addition, measurement of the average daily temperances will provide same indietdoa <br />' of freeze and thaw periods <br /> The lomtiou of mining areas and the number of tons mined should also be recorded oa a regular basis, <br /> <br />''I beeluse slope displacemenu aze often assadated with mining activity. One method of cataingiag this <br /> iaformadoa is to plat the mining area and to note the number of tons mined and the date on a plan <br /> map of the pit A histogram eln be made of tans mined versus time, and this' phmc ma then be <br />' mmpazed to the total ditplarameat graphs <br />J <br />1- <br />