CAJ | 학술논문

对扇形孔爆破裂隙产生机理的认识可以为改进爆破方案提供科学依据。利用程潮铁矿中深孔落矿参数及岩石的基本力学参数，通过AUTODYN软件，应用Johnson-Holmquist（J-H ）材料模型，来模拟岩石爆破产生的裂隙。通过在炮孔之间的孔底、中间和孔口位置添加高斯点来记录爆破过程中最大爆破应力变化。通过模拟结果分析，炮孔越是密集的地方爆破应力越大，爆破裂隙也越多；相邻炮孔间隔时间起爆可以大幅度提升孔底岩石的最大爆破应力；相邻炮孔间距较小时，间隔时间起爆的作用就不明显了，岩石受到的最大爆破应力主要受距离近的炮孔爆破应力波的影响。
대선형공폭파렬극산생궤리적인식가이위개진폭파방안제공과학의거。이용정조철광중심공락광삼수급암석적기본역학삼수，통과AUTODYN연건，응용Johnson-Holmquist（J-H ）재료모형，래모의암석폭파산생적렬극。통과재포공지간적공저、중간화공구위치첨가고사점래기록폭파과정중최대폭파응력변화。통과모의결과분석，포공월시밀집적지방폭파응력월대，폭파렬극야월다；상린포공간격시간기폭가이대폭도제승공저암석적최대폭파응력；상린포공간거교소시，간격시간기폭적작용취불명현료，암석수도적최대폭파응력주요수거리근적포공폭파응력파적영향。
It can provide scientific basis for improving blasting scheme by understanding fan-hole blasting-induced rock fracture production mechanism.It is available to simulate blasting-induced rock fracture by using the parameters of Chenchao Iron Mine,AUTODYN software and Johnson-Holmquist(J-H)model.It can record the max burst pressure by adding gauge points at bottom,middle and orifice of boreholes.The simulation result shows that denser the boreholes are,the higher pressure is and the more fracture is.The result also shows that delay detonators could dynamic increase max burst pressure of bottom rock,and the effect of delay detonators become less evident when the borehole spacing getting small,because the max burst pressure is mainly effect by the blasting stress wave of the borehole nearby.