猴子岩面板堆石坝石料开采爆破试验与分析

Blasting Test and Analysis of Stone Quarrying for Rock-fill Dam of Houziyan Hydropower Station

面板堆石坝填筑料被要求具有良好的级配,以便使填筑的坝体既有较好的压实度,又有良好的排水性。针对大渡河猴子岩水电站堆石料开采,总结了在色龙沟料场进行的6次现场爆破试验,并根据不同钻爆设计及爆破料筛分成果,分析了影响堆石料爆破颗粒级配的主要因素。成果分析表明,炮孔间排距、堵塞长度以及炸药单耗量等参数都会影响爆破料级配,在进行大规模料场开采前,应针对不同影响因素进行爆破试验,确定最为合理的爆破参数。猴子岩面板堆石坝色龙沟料场现场爆破试验取得了符合堆石料设计要求的爆破施工方案及钻爆参数,可为类似工程提供借鉴和参考。

Good gradation is required for the filling material of concrete face rock-fill dam in order to ensure good compaction and drainage.Taking the rock-fill material quarrying at Houziyan hydropower station on Dadu river as a research background,we summarize 6 groups of field blasting test in Selonggou quarry,and analyze the main fac-tors affecting the rock-fill material gradation based on different blasting designs and screening results.Research re-sults show that the gradation is affected by spacing between blasting holes,length of stem blocking,and unit con-sumption of detonator.Before large-scale stone quarrying,blasting tests should be conducted for each impact factor in order to determine the optimal blasting parameters.Through the field blasting tests,blasting scheme and parame-ters that can be used to get eligible rock-fill material are obtained,and the achievements in this research can be guidance and reference for similar projects.