狮子灘採石場的岩層是白堊紀砂岩,节理此較發达,岩石硬度一般在7級左右。採石場距大埧約1500公尺,高程在380以上,比埧頂高。根据实测每3—6公尺有东西向节理一条,每30—50公尺有南北向节理一条。縱横节理約成90°的夾角。採石场的面积約为38000平方公尺,开採高度为15—20公尺,开採的自由面長約450公尺。根据大埧堆石任务的要求,每天平均应开採塊石1500公方, Rock formations in the Shizitan quarry are Cretaceous sandstones, with more developed joints. The rock hardness is generally around 7th grade. The quarry is about 1,500 meters away from the stump. The elevation is above 380, higher than the stump. According to the actual measured every 3-6 meters have an east-west joint, every 30-50 meters have a north-south joint. Vertical and horizontal joints about the angle of 90 °. Quarry area of ​​about 38,000 square meters, mining height of 15-20 meters, mining free surface length of about 450 meters. According to the requirements of the large rockfill task, an average of 1,500 square feet of rock and stone should be mined every day,