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Review of Blasting Operations at Denver Brick Company's Golden Mine <br /> Q. Does a blaster really have control over how much vibration and noise are generated <br /> by the explosives? <br /> A. The primary factors affecting vibration and noise are within the blaster's control, <br /> including the size of the explosive charges, and the timing sequence used to delay them. <br /> For factors outside the blaster's control, such as weather and site conditions, <br /> experienced blasters know to anticipate and make conditions and to adjust for them. <br /> IMNI hiN <br /> ou <br /> •ol 8*r 11 <br /> .,0 <br /> PUM C*Wo <br /> te"1111141 <br /> 6W <br /> w+a <br /> P"Now , <br /> tM,oae�y ,�, >4c�Nr� arc <br /> Figure 2.8 - Using Delay Timed Non-electric Detonators to Reduce Ground Vibration <br /> 4.0 Regulations Governing Blasting and Explosive Use <br /> A review of all Federal and Colorado agencies and regulations governing the security, <br /> transportation and use of explosives follows. <br /> 4.1 Mine Safety & Health Administration (MSHA) <br /> MSHA has enforcement authority over blasting and the use of explosives at all U.S. mines. <br /> MSHA regulations governing all aspects of explosive use are found in the Code of Federal <br /> Regulations (CFR 30).These extensive regulations govern all aspects of explosive handling <br /> and blasting activities. <br /> 18 <br />