爆破作用线对非均质岩体破碎效果影响分析

发布时间：2018-04-26 09:26

本文选题：爆破作用线 + 非均质岩体　；参考：《金属矿山》2017年10期

【摘要】：在非均质岩体的露天矿进行大区深孔爆破中,通过设计优化的爆破网路,确定爆破作用方向,可使有大量结构面存在的非均质岩体有较好的爆破效果。爆破作用线就是根据非均质岩体节理、裂隙发育的变化趋势,采用逐孔毫秒微差多侧向自由面起爆增加径向拉应力使爆破作用增强。通过对黑山露天煤矿3#采区岩性和结构面分析,提出爆破作用线理论:对存在结构面的复杂岩体,增加爆破自由面,设计对称"V"型斜线间隔爆破作用线非电导爆管起爆网路实行逐孔毫秒微差,可减少岩石大块;对局部存在的非均质岩体,确定爆破作用线方向加强爆破作用,设计间隔爆破作用线斜线非电导爆管起爆网路实行逐孔毫秒微差起爆,可使岩体破碎均匀。这些研究成果对于解决干旱区非均质岩体的露天煤矿爆破技术问题有借鉴作用。
[Abstract]:In the large area deep hole blasting in the open pit of heterogeneous rock mass, by designing the optimized blasting network and determining the direction of blasting action, the non homogeneous rock mass which has a large number of structural surfaces can have good blasting effect. The blasting action line is based on the joint of the heterogeneous rock mass and the trend of the fracture development, and the multi side millisecond millisecond difference of the hole by hole is used. Through the analysis of the lithology and structure of the 3# mining area in the black mountain open coal mine, the blasting action line theory is put forward. The blasting free surface is added to the complex rock mass with the existing structure surface, and the design of the non conductance detonating network of the symmetrical "V" oblique line interval blasting line is designed by the hole by hole millisecond micro. The rock mass can be reduced, and the non homogeneous rock mass exists locally, and the blasting action line is determined to strengthen the blasting effect. The blasting network is designed to break the rock mass by millisecond millisecond detonation, which can make the rock mass broken even. These research results can be used to solve the blasting in the open pit mine of the inhomogeneous rock mass in the arid area. Technical problems can be used for reference.

【作者单位】：新疆工程学院采矿系;新疆黑山露天煤矿;
【基金】：国家自然科学基金项目(编号:51464043)
【分类号】：TD235.46

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