EVALUATION OF VIBRATION MAGNITUDE FROM STAGGERED DRILLED HOLE PATTERNS IN A LIMESTONE MINE, OKPELLA, EDO STATE, NIGERIA. FJS [Internet]. 2025 Jul. 20 [cited 2025 Sep. 2];9(7):222-5. Available from: https://fjs.fudutsinma.edu.ng/index.php/fjs/article/view/3787