期刊论文

Tao, G.-Q.(nhutgq@126.com)

中文

岩土力学

1000-7598

2011

32

12

3768-3772+3779

10.3969/j.issn.1000-7598.2011.12.038

湖南省自然科学基金项目（No.07JJ3090）；

本校为第一且通讯机构

无底柱分段崩落法是国内外地下矿山广泛采用的采矿方法.长期以来由于受凿岩、装药以及出矿设备的制约,国内矿山大多采用小结构参数的无底柱分段崩落法,所产生的地压问题十分严重,开采效率低.近年来无底柱分段崩落法朝着增大采场结构参数的方向发展,不但有利于改善采场稳定性,同时还降低了生产成本.因此,开展采场稳定性分析有利于实现安全、高效开采.采用三维有限元方法对10 m×10 m、15 m×15 m、15 m×20 m共3种不同结构参数的崩落法采场进行了数值模拟,对进路开挖与矿石回采两个不同过程的巷道项板竖直位移、主应力进行分析.数值计算结果表明:进路开挖时15 m×20 m与10 m×10 m的结构参数相比...

The pillarless sublevel caving is one of major mining methods in underground mine at home and abroad. As for the equipment constraint of rock drilling and blasting, the sublevel caving with small structural parameters has been applied for a long time processing with dynamite, and ore removal, which caused some problems such as serious ground pressure and low mining efficiency. In recent years, enlarging structural parameters is gradually used in pillarless sublevel caving, which improves both the mining stability and economic efficiency. Therefore, the analysis of underground pressure in pilla...