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<br /> <br />TRAPPER MINE RESPONSE TO PR-1 ADEQUACY RESPONSE DOCUMENT <br />May, 1987 <br />6. Blastin¢ Activities <br />Mr. Jim Pendelton, CMLRD, concerns as listed below are addressed in <br />revised PR-1 permit Section 2.2. <br />"The propogation of shock waves from the surface blasting could <br />increase the overburden load and reduce the strength of the support- <br />ing pillars leading to failure of those pillars?" <br />"Will the repeated exposure to blasting vibration degrade the roof <br />and ribs, leading to small roof falls or rib blowouts?" <br />"Should Trapper's blasting plan and/or Empire's roof bolting plan or <br />pillar sizing be amended?" <br />Response <br />Attached are three copies of a revised section to PR-1, 2.2, which <br />addresses Mr. Pendelton's concerns. <br />