田迎春,崔宇,陶治臣,祝贺超,毕枥,郑昌达,吴嘉桢,杨灿书

• 1:鞍钢基石矿业有限公司
• 2:北京科技大学土木与资源工程学院

摘要(Abstract)：

超深掏槽爆破技术在深孔硬岩竖井掘进过程中有着广泛的应用，相比同深掏槽，其可提升循环进尺，增加炮孔利用率，研究合理的超深掏槽参数对深孔硬岩竖井掘进工程具有重要意义。以鞍钢集团西鞍山铁矿副井的实际爆破设计及地质工程情况为背景，使用数值仿真软件ANSYS/AUTODYN，建立包含掏槽眼及辅助眼的7种超深掏槽爆破计算模型，对不同超深深度下的模型掏槽爆破过程进行模拟研究，通过对不同模型爆破过程中岩石粒子速度及超压变化规律进行分析，探究不同掏槽超深深度下岩石的损伤演化规律，得到爆破效果最佳的超深深度范围。结果表明:与传统掏槽相比，竖井超深掏槽爆破对进尺提升有显著影响，掏槽孔超深深度增加，掏槽孔与辅助孔之间岩石压力峰值及粒子抛掷速度增加，有利于岩石的损伤破坏及进尺的增加;随着超出深度的越来越大，掏槽孔与辅助孔之间岩石所受压力及抛掷速度增长趋势逐渐变缓，增长率逐渐降低。现场试验结果表明:使用优化方案后，掘进进尺得到大幅提升，周边眼深度为4500 mm，超深深度为500 mm时，平均循环进尺为4120 mm，月进尺超过115 m。研究结果可为类似工程项目的超深参数优化提供参考依据。

关键词(KeyWords)： 硬岩;竖井掘进;超深掏槽;循环进尺;炮孔利用率

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52227809)~~

作者(Author): 田迎春,崔宇,陶治臣,祝贺超,毕枥,郑昌达,吴嘉桢,杨灿书

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