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. The maximum charge weight has been calculated this way to ensure that any blast designed <br />under this criterion would no[ exceed the allowable amount using the scale distance formula. <br />Thereby, meeting the intent of the law to not exceed the maximum weight of explosives in <br />any 8-ms time period. Colowyo's blast records reflect the maximum weight of explosives <br />using the above method. <br />The typical blasting parameter tables are merely examples of the programs used in blasting <br />coal and overburden at Colowyo. As such, they are not intended to represent any one blast <br />exactly as conditions in the field dictate the exact design for each blast. For example, an <br />overburden blast may be drilled with an offset pattern, 2~ feet x 30 feet spacing and tied in <br />row on row rather than the design shown on Table 2.05-5. <br />The blast initiation systems that Colowyo uses may vary, but all are noted on the blast report <br />for each blast event. For example one type of blast initiation system is the EZ Dets system. <br />These systems are used to initiate the blast from the certified blaster to the initiation hole and <br />all other holes then tied into that system. An entire initiation system-could consist of down <br />the hole caps, delays, and tubing connected to a surface system of cords, delay connectors, <br />and initiation terminal. The system is designed specifically for each blast event to not exceed <br />the requirements of the scaled distance formula or the one hole per 8ms time period <br />requirements. Types of blasting materials and delays to accomplish this are noted on each <br />blast report. <br />Blastine Records <br />• Colowyo will keep a record of each individual blast by utilizing report formats shown in <br />Figure 2 -Blasting Report (coal and overburden), Figure 3 -Colowyo Chargewei¢ht Sheet <br />(overburden only). <br /> <br />2.05-28a Revision Date: 12/19/03 <br />Revision No.: MR-61 <br />