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Ore Control Manual page 2 <br />ore control is the responsibility of the Mine Geologist, but <br />requires close teamwork and cooperation between Mize and Mill <br />operations, and other groups in Technical Services. The Mine <br />Geologist acts as a coordinator for the above steps in the ore <br />control process. <br />A. Crest/toe layout: this is the process which direc~:s the drill <br />foreman as to where drilling is to occur. Blue, numbered lath will <br />generally be used for marking toe/crest lines. <br />B. Blasthole pattern layout: this is done by the Drill Foreman in <br />Mine Operations. The Drill Foreman gets guidance from Mine <br />Engineering for general locations, numbering and hole depth, but <br />will layout the pattern using painted marks or pin fle~gs, if snow <br />cover is present or expected. <br />C. Drilling and sampling: the Drill Operators drill the <br />blastholes at the locations and to the depths given by the Drill <br />Foreman. Drill Operators sample the drill hole, using the correct <br />sample length. The correct sample length is 15 feet. Different <br />lengths or drill depths may be marked on the ground ~r with cut <br />stakes set by Tech. Occasional deeper drilling may be done as <br />directed by the Mine Geologist. Only 15 feet is to be sampled, <br />with the subdrill (deeper) parts not being sampled. Sampling is <br />done using a sampler approved by the Mine Geologist. Sample bags <br />may be of varying types. A numbered wooden stake will tie placed at <br />the end of each row of blastholes, to assist surveying. Correct <br />identification and location of blastholes is critical to ore <br />control: <br />Only one sample per hole is routinely taken. Samples must be <br />marked clearly and accurately with the correct blasthole number in <br />all cases. If samples are to be left on the ground, they must not <br />be in a place where they could be damaged by equipment cr buried in <br />snow. Samples will be collected by the Drill Foreman and deliverFd <br />to the assay Lab. Samples must be laid out in order at the Lab to <br />see if any samples are missing or were skipped. If gaps or missing <br />samples are found, the Drill Foreman will get a dupli~~ate sample <br />from the blasthole cuttings pile. <br />D. Blasthole survey: surveying of the blasthole locations is done <br />by Mine Engineering in Technical Services. A blasthole pattern map <br />will be made to check the survey. A copy of the check .nap will be <br />given to the Mine Geologist. The copy will be used 1.o identify <br />blastholes to be assayed for cyanide-soluble copper. This <br />information will be given by the Mine Geologist to the Chief <br />Chemist. Blasthole survey maps will also be used as field base <br />maps for blasthole "logging" by the Mine Geologist. Blasthole <br />logging is examining blasthole cuttings for general rock-type <br />Rev. 4/20/93 <br />