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大连石灰石矿为浅海化学沉积的大规模石灰石矿体。岩层倾角20°～60°,容重2.67吨/米~3,普氏硬度系数f=6～8。矿层可分厚层(1米以上)、中厚层(0.5～1米)和薄层(0 5米以下)三种。物理机械性质变化不大,但局部地区地质构造复杂、裂隙发育,且有不规则溶洞和黄泥夹层,爆破性能很差。开采是由下盘向上盘推进。台阶高度5～20米,一般10～15米。以БУ-20-2型冲击式穿孔机穿孔、СЭ-3型电铲采掘。炮孔直径250毫米,主要爆破器材为8号电雷管和自制铵油炸药。
Dalian limestone mine is a large-scale limestone ore body deposited by shallow sea chemistry. Rock dip angle of 20 ° ~ 60 °, bulk density of 2.67 tons / m ~ 3, Platts hardness f = 6 ~ 8. The seam can be divided into thick (1 m above), medium thick (0.5 ~ 1 m) and thin (0 5 m below) three. Physical and mechanical properties change little, but in some areas complex geological structure, fracture development, and irregular karst caves and sand, blasting performance is poor. Mining is driven from the lower plate to the upper plate. Step height of 5 to 20 meters, usually 10 to 15 meters. To БУ-20-2 percussion punch perforation, Эн-3 electric shovel excavation. Blast hole diameter of 250 mm, the main blasting equipment for the No. 8 electric detonator and homemade ammonium oil explosives.