一种新的岩爆等级评估指标及其在某超埋深矿井中的应用

A Novel Rockburst Proneness Criterion and Its Application in an Over Buried Mine

现有多数岩爆指标判据考虑因素较为单一,对一些具体工程岩爆风险存在误判可能,不利于岩爆风险防控。在分析现有岩爆指标判据优缺点的基础上,提出了一种考虑岩爆发生内外因素的岩爆等级判别指标,该指标充分考虑了岩爆发生的充分必要条件即岩爆发生的外在驱动力(应力条件)和岩爆发生的内在条件(岩石固有的储能、耗能特性),弥补了多数岩爆判据只考虑内因或外因单一因素的不足,提高了判别结果的可靠性和稳定性,可更好地对潜在岩爆风险进行科学管控,实现地下工程的安全、高效开挖或开采。应用该指标判别了山东某超埋深金矿-1 480 m水平岩爆倾向性,判别结果经讨论分析认为可靠性较高,研究结果可为其他类似工程提供参考。

Most of the existing rockburst index criteria consider one-sided factors,which may misjudge the rockburst risk of some projects,which is not conducive to the prevention and control of rockburst risk.Based on the analysis of the advantages and disadvantages of the existing rockburst index criteria,this paper puts forward a rockburs index considering internal and ex-ternal factors.The necessary and sufficient conditions of rockburst is fully considered in the new index criteria,that is,the ex-ternal driving force of rockburst(the stress condition),and the internal condition of rockburst(the inherent energy storage and energy consumption characteristics of rock).It overcomes the deficiency that most existing rockburst index criteria only consid-er the single factor of internal or external factors,The reliability and stability of the rockburst intensity discrimination results are improved,the potential rockburst risk can be better controlled scientifically,and the safe and efficient production of under-ground engineering can be realized.The new rockburst index criteria is used to judge the tendency of rockburst at-1480 m level in a deeply buried gold mine in Shandong Province.The result of warning rockburst intensity using the new rockburst in-dex criteria are thought to be reliable after discussion and analysis.The research results can provide reference for other similar projects.