点荷载试验在典型露天采场超高边坡工程地质勘察中的应用  

Application of Point Load Test in Geological Survey of Ultra-high side slope engineering of typical open-pit stope

作　　者：李军[1] 朱昶[1] 田志超 陆建同 亓协全 张君 Li Jun;Zhu Chang;Tian Zhichao;Lu Jiantong;Qi Xiequan;Zhang Jun(Shandong Province Lunan Geology and Exploration Institute(Shandong Provincial Bureau of Geology and Mineral Resources No.2 Geological Brigade),Jining,Shandong,272100,China;Linyi Huibaoling Iron Mine Co,Ltd,Lanling,Shandong,277700,China;Shandong Geological Exploration Institute of China Chemical Geology and Mine Bureau,Jinan,Shandong,250013,China)

机构地区：[1]山东省鲁南地质工程勘察院(山东省地质矿产勘查开发局第二地质大队),山东济宁272100 [2]临沂会宝岭铁矿有限公司,山东兰陵277700 [3]中化地质总局山东地质勘查院,山东济南250013

出　　处：《化工矿产地质》2024年第3期260-266,共7页Geology of Chemical Minerals

基　　金：国家自然科学基金项目邻域土体卸荷-加载作用下现役地铁盾构隧道灾变机理研究(编号:51578023)。

摘　　要：夏日哈木镍钴矿山拟建大型超高边坡露天采场,需进行边坡工程地质勘察工作。岩石抗压强度是重要的工程地质参数,如何在青藏高原山区快速获得各类岩石的单轴抗压强度等参数非常关键,尤其是各类难以进行室内压缩试验的风化或蚀变岩石。本次在野外现场采用济南矿岩HDH-1型岩石点荷载仪对矿区内各类岩石进行点荷载试验,并通过前人总结的点荷载强度与单轴抗压强度转换公式计算出了各类岩石的单轴抗压强度及层状(条带状)岩石的各向异性指数。本次点荷载试验克服了昆仑山区岩石测试加工工序复杂、周期较长、成本高等因素,且适用于风化层、蚀变带内不易进行室内压缩试验的岩石,是一种间接测量估算岩石相关强度参数的快捷方法,对以后西部山区的工程地质勘察工作具有较为广泛的借鉴作用。The construction of a large ultra high slope open-pit stope at the Xiarihamu nickel-cobalt mine requires slope engineering geological survey work.Rock compressive strength is an important engineering geological parameter,it is crucial to quickly obtain the uniaxial compressive strength and other parameters of various rocks in the mountainous areas of the Qinghai-Tibet Plateau,especially for weathered or altered rocks that are difficult to carry out indoor compression tests.This time,in the field site,the Jinan Mining Rock HDH-1 Rock Point Load Instrument was used to carry out point load tests on various types of rocks in the mining area.The uniaxial compressive strength of various rocks and the anisotropy index of layered(strip)rocks were calculated using the conversion formula between point load strength and uniaxial compressive strength summarized by the predecessors.This point load test not only overcomes the complex,long cycle,and high cost factors of rock testing and processing in the Kunlun Mountains,but also is suitable for rocks in weathered layers and alteration zones that are difficult to carry out indoor compression tests.It is a quick and indirect method for measuring and estimating rock related strength parameters,and has a wide reference value for future engineering geological exploration work in western mountainous areas.

关 键 词：点荷载试验 单轴抗压强度 各向异性指数 超高边坡露天采场 夏日哈木镍钴矿 

分 类 号：TD87[矿业工程—非金属矿开采]