三河口水利枢纽厂房边坡爆破大块率问题分析及其爆破参数优化

发布时间：2018-05-31 09:43

本文选题：三河口水利枢纽 + 边坡爆破　；参考：《水利水电技术》2017年08期

【摘要】：引汉济渭工程三河口水利枢纽厂房边坡爆破开挖施工中,出现了边坡预裂爆破半孔率不高、爆破后大块岩石较多以及根底或者马道超爆等问题,后续开挖运输过程中需要二次破碎,不但增加了施工成本,也影响施工进度、影响边坡外观效果。为了彻底解决上述问题,深入分析现场爆破作业操作流程,分析对比方案和实施过程中的问题,通过试验确定岩石强度等影响爆破效果的要素,根据实测数据进行爆破设计方案优化。结果表明:通过现场跟踪记录各工序,找出了现场存在的导致大块率过高的主要因素和原因,逐一分析解决,并通过逐次爆破后效果分析进行爆破设计优化。优化后的爆破方案基本解决了爆破后大块岩石较多的问题。这表明:结合生产开展爆破试验,能够获得安全、高效、经济的钻孔与爆破参数。
[Abstract]:In the excavation of the slope of the Sanhekou Water Conservancy Project of the Huan-Ji-Wei Project, there are some problems, such as the low pre-splitting blasting half-hole rate, the large rock mass after blasting, and the root or Madao superexplosion, etc. In the course of subsequent excavation and transportation, secondary crushing is required, which not only increases the construction cost, but also affects the construction schedule and the slope appearance. In order to solve the above problems thoroughly, the operation flow of field blasting is deeply analyzed, the problems in the process of comparison and comparison are analyzed, and the factors affecting the blasting effect, such as rock strength, are determined through tests. According to the measured data, the blasting design scheme is optimized. The results show that the main factors and causes that lead to the high mass rate are found out by tracking and recording each process on the spot, and analyzed one by one, and the blasting design is optimized by successive blasting effect analysis. The optimized blasting scheme basically solves the problem of large rock mass after blasting. The results show that the blasting test combined with production can obtain safe, efficient and economical drilling and blasting parameters.
【作者单位】：陕西省引汉济渭工程建设有限公司;
【基金】：国家重点研发计划项目(2016YFC0401805) 2013年陕西省科技统筹创新工程计划项目(2013KTZB-03-01-01)
【分类号】：TV542

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