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Record Keeping <br />Figure 50, on page 103, shows a typical blast record form that <br />provides the operator with an efficient and complete record of each <br />event. It can include seismograph records, and can be used in <br />conjunction with Figures 51 and 52, opposite, to provide sketches <br />of the blast and delay pattern. <br />Figure 53, below, shows a representative blast and seismograph <br />analysis form, as provided by a consultant for use with his <br />instrumentation. Figure 54, on page 106 shows another example of <br />this, with a slightly different format. In this case, the form is <br />provided with carbon copies which may be retained with the <br />operators blast records. <br />YIBRA -TECH BLAST AND SEISMOGRAPH ANALYSIS <br />Company _ Operation' Name Coal 0 Quarry 0 Canon. 0 <br />Stab Other <br />BLAST DATA <br />Snot No Burden tt Total Explosives lbs Max Explo /Delay lbs Delay Nos <br />Date Spacing It lbs Max. Holes/Delay Delay Mk <br />Time Diameter in lbs Dist Neatest Bldg ft. No. 01 Timer Circuits <br />No. Nolen Stemming _ 1t lbs De Nearest Bldg Timer Interval ma <br />Depth ft Stem. Type lba Weather Blaster <br />Exact Blast Location Blasters Comments <br />SEISMOGRAPH DATA <br />Exact Location of Seis Dist To Sers. tt <br />Sees. No .—,_ Cassette No. _ Operator wt ., L (Prticle Velocity on <br />Pang. ips Tnggar Level ips Witness Air Overpressure dPI <br />VIBRATION MEASUREMENTS <br />✓: . V. MC..1. Dvlr• ✓p■■••• • 1 44r Ova• <br />Transverse Inrsec. Peas Ground Vibration is Iwanml (in excess oft limit of in /sac. <br />Vert eel ireSeC Peak Air Overpressure is Iw inm) in excess 01) limn of decibels <br />Longitudinal in/sec. Analyst's Remarks <br />Overpressure 001 Analysis By <br />Inr .r.c St S 01 rc. esr o.a.•.i <br />Figure 53. <br />Typical blast and seismograph record form (1). <br />Pre -blast and post -blast surveys also need very careful record <br />documentation. Whether the initial survey employs written or tape <br />