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1·The pillar extraction practice has proved the correctness of the test results of similarity model.

矿柱回采的实践证明了相似材料模型试验结果是正确的。

2·The accurate awareness of actual pillar boundary is the basis for the blast design for pillar extraction and is also one of the effective ways to improve the mine economic benefit.

准确掌握矿柱实际边界是矿柱回采爆破设计的基础，也是提高矿山经济效益的有效途径之一。

3·Based on the stress analysis of filling body, it was pointed out that reducing the destructive function of blasting on the filling body is one of the technical keys in ore pillar extraction.

通过对充填体受力分析，指出减小爆破对充填体的破坏作用是矿柱回采的技术关键之一。