Drilling and Blasting Drilling Machine Sample Clauses

Drilling and Blasting Drilling Machine. Drilling Parameters for Quartz: Burden (B) : 2.50 Meters Spacing (S) : 3.00 Meters Depth (Includes sub grade drilling) (D) : 3.0 Meters The angle of inclination should less than 78⁰ to 82⁰. Sub grade Drilling +8% of the Depth of the bench. (6 Meters + 0.48 = 6.48 or Say 6.5 meters) In-situ density : 2.5 Yield per hole : BxSxDx2.5 : 2.5x 3.00x3.0x2.5 = 56.25 Tons Yield per meter : 56.25 /3 = 18.75 or Say 19 Tons Drilling required for planned ROM & Waste = 266800.20/9 = 14042.11579 meters/annum Technical specification of diesel driven portable compressor: Compressor capacity : 600 cfm Compressor output capacity : 10.5 Kg/cm2 Wagon Drill : 54 mm ∅ (Pneumatic) Working pressure on hammer : 150 lbs Average drilling output per hour : 12 meters Total hours required for planned production: 14042.115 meters/12 meters = 1170.17 hours/ annum = 1170.17/10 = 117.017 or say 117 hours/ Month Effective working hours per day from 8 am to 6 pm is 8 hours Number of drilling days required per month = 117.017/8 = 14.62 days or say 14 days By considering 80% availability of men & machinery, One DTH drilling units, having 54 mm ∅ is adequate to meet out the targeted production during the plan period. These holes are charged with slurry explosives with ANFO and delay detonators shall be used for blasting. Drilling and blasting operations are being carried out on contractual basis with blasting and explosive license holder. However, all the safety precautions as per MMR 1961 and Mines Safety Rules shall be take care while blasting.
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