步距是无底柱分段崩落采矿法中的主要结构参数之一,它直接关系到矿石的损失和贫化。因此,自从无底柱分段崩落法在我国被应用以来,不少矿山、院校和研究部门都对它进行了研究,并且取得了一定的成绩。1965年马鞍山矿山研究院通过放矿模拟试验,提出了在分段高度为10米、间距为10米(简称10×10米)、端壁 Step striding is one of the main structural parameters in the pillarless caving mining method, which is directly related to the ore loss and depletion. Therefore, since the pillarless caving method has been applied in our country, many mines, colleges and research departments have studied it and achieved some achievements. In 1965, the Ma’anshan Mining Research Institute put forward the method of ore-dressing simulation experiment in the section height of 10 meters, the interval of 10 meters (10 × 10 meters)