钻孔偏差对通过长孔提升爆破形成提升的影响

IF 6.7 1区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY Tunnelling and Underground Space Technology Pub Date : 2024-10-14 DOI:10.1016/j.tust.2024.106136
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引用次数: 0

摘要

在地下矿山长孔提升爆破(LHRB)过程中,钻孔偏斜严重影响爆破效果,大大增加了提升形成的难度,降低了形成提升的质量。为研究井眼偏差对烧切爆破(BCBM)形成隆起的影响,本研究从理论上分析了井眼偏差对爆破形成隆起的影响,构建并验证了井下深孔偏差机理模型,揭示了不同烧切模式下井眼偏差对BCBM形成长孔隆起的影响规律,指导了矿井深孔爆破形成隆起的实践。结果表明:(1)软硬交替的诱发偏差岩层是深孔钻孔偏差的重要原因;(2)在相同地质条件下,钻孔偏差通常与钻孔直径呈负相关;(3)四空孔筒形切削模式(FECM)的抗钻孔偏差能力优于单空孔螺旋切削模式(SECM);以及(4)根据钻孔偏差的实际测量结果优化爆破的起爆顺序,可显著提高养生层的质量。本研究的结果为评估长孔偏差的机理提供了依据,并为孔偏差条件下的 LHRB 设计提供了理论和实践参考。
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Effect of borehole deviation on raise formation via long-hole raise blasting
During Long-hole raises blasting (LHRB) in underground mines, borehole deviation seriously affects the blasting effect, greatly increases the difficulty of raise formation, and reduces the quality of formed raises. To study the effect of borehole deviation on raise formation via burn cuts blasting mode (BCBM), this study theoretically analysed the effect of borehole deviation on raise formation via blasting, constructed and validated a mechanism model of underground deep hole deviation, revealed the effect pattern of borehole deviation on the formation of Long-hole raises via BCBM under different cut modes, and guided the practice of raise formation via deep hole blasting in mines. The results showed that (1) deviation-inducing rock strata with alternating soft and hard rocks are important causes of borehole deviation in deep holes; (2) under the same geological conditions, the borehole deviation is usually negatively correlated with the borehole diameter; (3) the resistance to borehole deviation of the four-empty-hole barrel cut mode (FECM) is better than that of the single-empty-hole spiral cut mode (SECM),and (4) optimizing the firing order of blasting based on the actual measurement of borehole deviation can significantly improve the quality of raise formation. The results of this study provide a basis for assessing the mechanism of Long-hole deviation and theoretical and practical references for the design of LHRB under the condition of borehole deviation.
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来源期刊
Tunnelling and Underground Space Technology
Tunnelling and Underground Space Technology 工程技术-工程:土木
CiteScore
11.90
自引率
18.80%
发文量
454
审稿时长
10.8 months
期刊介绍: Tunnelling and Underground Space Technology is an international journal which publishes authoritative articles encompassing the development of innovative uses of underground space and the results of high quality research into improved, more cost-effective techniques for the planning, geo-investigation, design, construction, operation and maintenance of underground and earth-sheltered structures. The journal provides an effective vehicle for the improved worldwide exchange of information on developments in underground technology - and the experience gained from its use - and is strongly committed to publishing papers on the interdisciplinary aspects of creating, planning, and regulating underground space.
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