摘要
The blasting practices in a limestone quarry with karstic cavities have beenpresented. The existence of karstic cavities in the quarry has reduced blasting efficiencysignificantly. In order to improve blasting efficiency different blasting strategies (loading holeswith ANFO in plastic bag, recording cavity location along the holes and charging the holes accordingto this information, and modifying blasting pattern according to karstic cavities) had beenimplemented and the results were evaluated on per ton cost basis. It was concluded that efficientblasting in such aquarries requires determining the size and shape of karstic cavities and based onthis information, to modify the blast pattern and charge the holes. The suggested method is torecord the cavity along the drill hole and to generate 3D model of cavities. By doing this, theproduction cost in the limestone quarry has decreased from 0.407 dollars/t to 0.354 dollars/t.
The blasting practices in a limestone quarry with karstic cavities have beenpresented. The existence of karstic cavities in the quarry has reduced blasting efficiencysignificantly. In order to improve blasting efficiency different blasting strategies (loading holeswith ANFO in plastic bag, recording cavity location along the holes and charging the holes accordingto this information, and modifying blasting pattern according to karstic cavities) had beenimplemented and the results were evaluated on per ton cost basis. It was concluded that efficientblasting in such aquarries requires determining the size and shape of karstic cavities and based onthis information, to modify the blast pattern and charge the holes. The suggested method is torecord the cavity along the drill hole and to generate 3D model of cavities. By doing this, theproduction cost in the limestone quarry has decreased from 0.407 dollars/t to 0.354 dollars/t.
