【2017年整理】无底柱分段崩落法.ppt

3 二、无底柱分段崩落法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2.3大间距数学模型的另一种推算方法 东北大学刘兴国教授推导的大间距数学模型公式过程为： 梅山铁矿提出根据纯矿石放出体相切条件确定进路间距。纯矿石放出体相切时的排列如图6（a）所示，进路间距确定方法如图6（b）所示，根据图6（b）求得切点位置（x，y）后，便可得出进路间距。 4 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 二、无底柱分段崩落法 4 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3 二、无底柱分段崩落法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 2.3放出体空间排列理论的要点如下 1）无底柱分段崩落法的放矿是在复岩下进行的，崩落矿石的爆破堆积体形态与放出体形态吻合程度程度越高，所得到的技术经济指标越好。 2）崩落矿石的爆破堆积体形态取决于无底柱分段崩落法采矿结构参数，即分段高度、进路间距、崩矿步距三度尺寸。 3）放出体形态为椭球体，一般情况下其长半轴a与横半轴b之比为2.5--3。 上述三点与传统的放矿理论完全一致，区别在于下面几点。 4 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 4）在无底柱分段崩落法采矿结构参数优化问题的实质就是放出体的空间排列问题。排列密度最大的为最优。 5）根据放出体空间排列原则可得到两种同为最优的结构，大间距结构和高分段结构。在当前的技术经济条件下，大间距比高分段具有更强的可操作性. 6）在无底柱分段崩落法中，增加进路间距不一定是大间距、同样加大分段高度也不一定是高分段，其关键是看放出体的空间排列形式。 7）大间距结构参数中，分段高度与进路间距之比是为变量。 4 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3 二、无底柱分段崩落法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3 二、无底柱分段崩落法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3 二、无底柱分段崩落法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3 二、无底柱分段崩落法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3 二、无底柱分段崩落法 Evaluation only. Created with Aspose.Slides for .NET 3.5 Client Profile 5.2.0.0. Copyright 2004-2011 Aspose Pty Ltd. 3 二、无底柱分段崩落法 Evaluation only. Created with Aspose.