崔正荣,汪禹,仪海豹,杨海涛,金科

• 1:中钢集团马鞍山矿山研究院有限公司
• 2:马鞍山矿山研究院爆破工程有限责任公司

摘要(Abstract)：

随着开采深度的增加,岩体开挖过程中其受力状态将发生改变,岩体爆破破坏作用将由原来的爆破动荷载转变为爆破动荷载和地应力静荷载形成的耦合荷载。基于ANSYS/LS-DYNA模拟软件,开展了开采深度为1000 m、1500 m和2000 m条件下岩体双孔爆破数值模拟。结果表明:随着开采深度的增加,地应力随之增大,通过布置合理的诱导工程,使得岩体X方向损伤半径由3.81 m增大至13.62 m,增加幅度达257.48%;Y方向损伤半径由3.65 m增大至11.66 m,增加幅度达219.45%;损伤深部由10.08 m增加到22.34 m,增加幅度达到121.63%。在此基础上,开展了开采深度为780m、1000 m条件下现场爆破漏斗试验,试验结果表明:随着开采深度的增加,岩石爆破漏斗深度、漏斗体积等呈上升趋势,岩石炸药单耗呈降低趋势,降低幅度达4.79%,进一步验证地应力对岩体爆破致裂起促进作用。

关键词(KeyWords)： 深部开采;损伤破坏;数值模拟;促进作用;爆破效果

Abstract:

Keywords:

基金项目(Foundation): “十三五”国家重点研发计划课题——深部高储能矿岩组孔超前致裂精准爆破技术(*2017YFC0602902)

作者(Author): 崔正荣,汪禹,仪海豹,杨海涛,金科

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