缓倾斜露天矿顺倾向采矿法的改进

张钢油田石灰石矿根据矿山实际情况对缓倾斜露天矿顺倾向采矿法进行改进，采用由上而下顺倾向与水平分段相结合，横向爆破，沿走向运输，多台阶伺步推进的采矿方法，使矿石回采率达到95％以上，贫化率低于1％，年创经济效益近10万元。

Improvement on Method of Mining Along the Slope Direction in Gently Inclined Open-mine

According to the practice of the mine production, the Hutian Lime-stone Mine of Zhanggang has improved the method of mining along slope direction in gently inclined open-mine. The main methods, such as combining along slope from top to bottom with cutting into level steps, transverse blasting, transporting along trend, advancing all the steps at the same time etc. have been used, then the ore recovery ratio is more than 95%, the mining dilution ratio is less than 1%, the economic benefit is almost 0.1 million Yuan per year.