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Review of Blasting Operations at Denver Brick Company's Golden Mine <br /> In this section, Stanto Group Inc evaluates all the potentially damaging effects that blasting <br /> might have on people and nearby property on and near Golden Mine. Stanto Group Inc also <br /> recommends specific measures that can be employed to mitigate the reviewed blasting impacts <br /> and risks. <br /> 2.1 Impacts of Blast Induced Ground Motion and Fracturing: <br /> The purpose of this section is to evaluate the relative potential for all forms of possible damage <br /> that might occur due to blast induced ground motion or radial cracking. This section examines <br /> their effects on neighboring property and water wells near the mine site. This section is <br /> dedicated to explaining in detail the potential damage concerns by giving the reader an <br /> adequate understanding of how blast induced ground motion and fracturing can impact nearby <br /> structures. <br /> The following blast motion impacts are analyzed in the indicated subsections: <br /> Damage Concern: Section: <br /> Structural Damage.........................2.1.2 <br /> Water Well Damage........................2.1.3 <br /> Stanto Group Inc also reviews and comments on the appropriateness of currently proposed <br /> blast control measures and in some areas, Stanto Group Inc recommends additional controls. <br /> 2.1.1 Review of Blasting Vibration Phenomena: <br /> When an explosive charge detonates in a rock mass, the energy distributes rapidly by kinectly <br /> displacing the sudden energy into the rock mass. Some waves pass through the"body" of the <br /> rock mass. The primary compression waves (P)and shear waves (SH, SV)are noted in Figure <br /> 2.1, below. Other surface vibration waves travel along the ground surface like the way waves <br /> travel along the surface of water. Wave energy will be reflected, refracted and attenuated by <br /> various geological and topographical conditions. When seismic waves pass through the ground, <br /> the ground particles will oscillate within the rock mass, soon after blasting has stopped or the <br /> energy has finally distributed into the rock mass, the vibration energy dissipates and the ground <br /> particles become still. <br /> 6 <br />