开阳磷矿具有矿石品位高,储量大等特点,是我国磷矿石生产的重要基地之一。 磷块岩矿床呈倾斜中厚矿体产出,倾角多为30～40°,厚3～7米。矿石性脆,节理发育,f=4～11,中等稳固,凿爆性好;顶板为震旦系灯影组白云岩,垂直厚度90米以上,致密而稳固,f=7～12, 凿爆性较好; Kaiyang phosphate rock with high grade ore, reserves and other characteristics of China’s phosphate rock production is one of the important bases. Phosphorite deposit is inclined to thick ore body output, dip angle of 30 ~ 40 °, thickness 3 ~ 7 meters. The ore is brittle and the joints developed. The height is moderately stable and the chisel explosion is good. The roof is dolomite of the Sinian Dengying Formation with a vertical thickness of over 90 meters, dense and stable, with f = 7-12, better;