崩落采矿法挤压爆破质量控制方法的实验

发布时间：2019-03-26 15:01

【摘要】：为提高崩落采矿法挤压爆破作业中的爆破质量,应用物理模拟实验法和数值模拟实验法对中深孔挤压爆破质量控制方法进行了实验。基于矿岩爆破破碎机理和相似理论,优化了实验方案,设计了实验工艺流程和实验装置。进行了可爆性实验、物理相似材料模拟爆破实验和三维数值模拟爆破实验,对不同装药结构和爆速条件下岩体的破坏效果、应力场变化和爆破能量释放规律进行了研究。实验结果表明:较高爆速炸药在应力作用、裂隙形成和破坏效果方面均优于低爆速炸药,孔底起爆和孔内布设全长导爆索有利于改善爆破质量。实验成果可以为中深孔挤压爆破质量控制技术的实验研究和实验设计提供依据。
[Abstract]:In order to improve the blasting quality of extrusion blasting by caving mining method, the quality control method of medium-deep hole extrusion blasting was tested by physical simulation experiment and numerical simulation experiment. Based on the fracture mechanism and similarity theory of ore-rock blasting, the experimental scheme is optimized and the experimental process and equipment are designed. The blasting effect, stress field variation and blasting energy release rule of rock mass under different charge structure and blasting velocity were studied by means of explosibility experiment, physical similar material simulation blasting experiment and three-dimensional numerical simulation blasting experiment. The experimental results show that the high detonation velocity explosive is superior to the low detonation rate explosive in stress action, crack formation and damage effect, and the bottom initiation of the hole and the placement of the full-length detonating cord in the hole are beneficial to the improvement of the blasting quality. The experimental results can provide the basis for the experimental research and experimental design of the quality control technology of medium-deep hole extrusion blasting.
【作者单位】：北京科技大学土木与资源工程学院;北京科技大学金属矿山高效开采与安全教育部重点实验室;
【基金】：国家自然科学基金资助项目(51374032) 国家“十二五”科技支撑计划(2012BAB01B04) 中央高校基本科研业务费(FRF-OT-16-015ST)
【分类号】：TD235.4;TD853.36

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