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02a0019027;20011205d1994 ekmy0engy01;eng;a z 000yy;r;Studies of stope-scale seismicity in a hard-rock mine. pt.1, methods and factors;Robert L. Kranz, John P. Coughlin & Selena Billington;[S.l.];U.S. Bureau of Mines;1994;27 p.;ill;Report of Investigations;U.S. Bureau of Mines;no.9525;2001b;aReport of Investigations ; fU.S. Bureau of Mines ; vno.9525;坚硬岩石矿山采区范围的地震活动性的研究,第1部分--方法和要素;a720;Kranz ; Coughlin ; Billington;Robert L. ; John P. ; Selena;101;456941;P;720.66;R29u;v9525 ; r279.27;a03;b1;cP