Stability study of open-pit slope rock mass based on oriented core and OTV/ATV survey
-
摘要: 某露天矿边坡岩体稳定性主要受区内断层和节理裂隙等地质结构影响，为查明岩体结构面分布特征，通过对4 个岩土工程勘察钻孔进行Reflex ACT Ⅲ岩心定向处理，但由于花岗岩侵入体与沉积岩接触带附近的岩体破碎、裂隙发育影响了岩心定向准确率，各钻孔高置信度的岩心定向数据比例仅为8.05%~34.29%。为此，本文采用光学电视图像（OTV）/声学电视图像（ATV）测井技术，通过高分辨率、连续、定向的360°钻孔壁图像有效获取了岩性和构造特征、关系和方向数据，提高了钻孔岩心定向的地质结构信息数据精度。在此基础上，利用赤平极射投影理论，通过动力学分析，发现该露天边坡主要破坏模式是楔形滑动破坏，概率为12.66%~34.99%，其次为平面滑动，概率为3.40%~20.36%，为露天开采边坡控制提供了依据。Abstract: The stability of the slope of an open-pit mine is mainly affected by geological structures such as faults and joint of rock mass. In order to identify the distribution characteristics of the rock mass structural, the Reflex ACT Ⅲtools were used to unify thecore orientation of 4 geotechnical survey holes. However, the proportion of highly reliable core orientation data for each borehole only 8.05%~34.29%, due to therock mass fragmentation and joint development near the contact zone between granite intrusions and sedimentary rocks, which affects the accuracy of core orientation. Therefore, this article took OTV/ATV survey to obtain lithology and structural characteristics,relationships and direction data effectively and improve the accuracy of geological structure information data of core orientation, through high-resolution, continuous and oriented 360° borehole wall images. Based on this, failure mode of the open pit mine was studied by equatorial polar projection theory and dynamic analysis. According to the result, the main failure mode is wedge sliding failure, with a probability of 12.66%~34.99%, followed by plane sliding, with a probability of 3.40%~20.36%, which provides the foundation for open-pit mining slope control.
-
-
[1] 李元松,王玉,朱冬林,等.边坡稳定性评价方法研究现状与发展趋势[J].武汉工程大学学报,2021,43(4):428-435.
LI Yuansong, WANG Yu, ZHU Donglin, et al. Research status and developmental trends of slope stability evaluation method[J]. Journal of Wuhan Institute of Technology, 2021,43(4):428-435.
[2] 夏元友,李梅.边坡稳定性评价方法研究及发展趋势[J].岩石力学与工程学报,2002,21(7):1087-1091.
XIA Yuanyou, LI Mei. Evaluation method research of slope stability and its developing trend[J]. Chinese Journal of Rock Mechanics and Engineering, 2002,21(7):1087-1091.
[3] 崔华丽,谯鹏志,王佃明.库水位变动情况下库岸边坡稳定性研究--以白鹤滩水电站石圪垴滑坡为例[J].钻探工程,2023,50(5):36-42.
CUI Huali, QIAO Pengzhi, WANG Dianming. Study on stability of reservoir bank slope under fluctuated water level:A case of Shigenao Landslide in Baihetan Hydropower Reservoir[J]. Drilling Engineering, 2023,50(5):36-42.
[4] 杨子跃,王济君,徐鹏.降雨-堆载耦合作用下深厚填土边坡稳定性分析[J].钻探工程,2023,50(4):94-102.
YANG Ziyue, WANG Jijun, XU Peng. Stability analysis of deep fill slope under the influence of rainfall-surcharge coupling[J]. Drilling Engineering, 2023,50(4):94-102.
[5] 雷世平,李京泽,刘磊磊,等.基于克里金代理模型与子集模拟的边坡高效可靠度分析[J].钻探工程,2021,48(12):107-113.
LEI Shiping, LI Jingze, LIU Leilei, et al. Slope reliability analysis using Kriging-based Subset simulation[J]. Drilling Engineering, 2021,48(12):107-113.
[6] 乔兰,蔡美峰.新城金矿深部节理裂隙调查及岩体质量分级评价研究[J].中国矿业,2000,9(4):70-74.
QIAO Lan, CAI Meifeng. Investigation and analysis of engineering geological condition in Xincheng gold mine[J]. China Mining Magazine, 2000,9(4):70-74.
[7] 康红普,司林坡,苏波.煤岩体钻孔结构观测方法及应用[J].煤炭学报,2010,35(12):1949-1956.
KANG Hongpu, SI Linpo, SU Bo. Borehole observation methods in coal and rock mass and their applications[J]. Journal of China Coal Society, 2010,35(12):1949-1956.
[8] 杨泉宁,杜菊民,徐明钻,等.定向岩芯构造分析及在金矿勘查中的运用[J].地质学刊,2014,38(3):479-482.
YANG Quanning, DU Jumin, XU Mingzuan, et al. Structural analysis of oriented drill core and its application in gold exploration[J]. Journal of Geology, 2014,38(3):479-482.
[9] 凌振武,刘亚斌,董树伟,等.Reflex ACT 岩心定向设备及其工程应用[J].探矿工程(岩土钻掘工程),2016,43(3):60-64.
LING Zhenwu, LIU Yabin, DONG Shuwei, et al. Reflex ACT core orientation device and its engineering application[J].Exploration Engineering (Rock & Soil Drilling and Tunneling),2016,43(3):60-64.
[10] 孙建维.定向钻孔在矿井地质方面的技术应用[J].煤炭与化工,2022,45(6):89-91,116.
SUN Jianwei. The technical application of directional drilling hole in mine geology[J]. Coal and Chemical Industry, 2022,45(6):89-91,116.
[11] 谭显江,张建清,刘方文,等.高清数字钻孔电视技术研发及其在水电工程中的应用[J].长江科学院院报,2012,29(8):62-66.
TAN Xianjiang, ZHANG Jianqing, LIU Fangwen, et al.R& D of high-resolution digital borehole TV technology and its application in hydropower project[J]. Journal of Yangtze River Scientific Research Institute, 2012,29(8):62-66.
[12] Williams H J, Johnson C D. Acoustic and optical boreholewall imaging for fractured-rockaquifer studies[J]. Journal of Applied Geophysics, 2004,55(1/2):151-159.
[13] Hasnulhadi A, Kamaruddin H C. Acoustic and optical televiewer borehole logging[C]//Research and Development Seminar 2016. Bangi (Malaysia), 2016:8-10..
[14] 邵阳,汪进超,韩增强.数字钻孔摄像技术在页岩气勘探中的应用[J].工程勘察,2020,48(5):21-27.
SHAO Yang, WANG Jinchao, HAN Zengqiang. Application of digital borehole camera technique in shale gas exploration[J]. Geotechnical Investigation & Surveying, 2020,48(5):21-27.
[15] 王成虎,郭启良,陈群策,等.新一代超声波钻孔电视及其在工程勘察中的应用研究[J].地质与勘探,2007,43(1):98-101.
WANG Chenghu, GUO Qiliang, CHEN Qunce, et al. New acoustic borehole televiewer and its application in geotechical investigation[J]. Geology and Prospecting, 2007,43(1):98-101.
[16] 苏锐,宗自华,王驹.高分辨率声波钻孔电视及其在核废物地质处置深部岩体研究中的应用[J].岩石力学与工程学报,2005,24(16):2922-2928.
SU Rui, ZONG Zihua, WANG Ju. Acoustic borehole televiewer with high resolution and its application to deep formation for geological disposal of nuclear waste[J]. Chinese Journal of Rock Mechanics and Engineering, 2005,24(16):2922-2928.
[17] Tezuka K, Niitsuma H. Stress estimated using microseismic clusters and its relationship to the fracture system of the Hijiori hot dry rock reservoir[J]. Developments in geotechnical engineering, 2000,84:55-70.
[18] Pollok L, Saßnowski M, Kühnlenz T, et al. Geological exploration and 3D model of the Asse salt structure for SE expansion of the Asse II mine[J]. Mechanical Behavior of Salt IX(Salt-MechIX), 2018(9):753-763.
[19] Martel J S. Analysis of fracture orientation data from boreholes[J]. Environmental and Engineering Geoscience, 1999,5(2):213-233.
[20] Rahiman T I H. Digital imaging of geotechnical boreholes:benefits and risks[J]. Australian Geomechanics Journal, 2018,53(3):153-161.
[21] Ureel S, Momayez M, Oberling Z. Rock core orientation for mapping discontinuities and slope stability analysis[J]. International Journal of Research in Engineering and Technology,2013,2(7):1-8.
[22] 王平,冯兴隆,蔡永顺,等.基于钻孔超声波成像技术的普朗铜矿钻孔节理分布规律研究[J].矿冶,2019,28(2):1-5.
WANG Ping, FENG Xinglong, CAI Yongshun, et al. Distribution of borehole joints by borehole ultrasonic technology in Pulang Copper deposit[J]. Mining and Metallurgy, 2019,28(2):1-5.
[23] 王晓兵,王俊卿.基于孔内电视技术的岩体节理裂隙特征研究[J].岩土工程技术,2021,35(5):286-293.
WANG Xiaobing, WANG Junqing. Characteristics of rock joints and fissures based on borehole television technology[J].Geotechnical Engineering Technique, 2021,35(5):286-293.
[24] 吴江伟,吴鹏程.攀枝花朱矿南帮边坡稳定性的运动学分析[J].现代矿业,2020,36(7):82-84.
WU Jiangwei, WU Pengcheng. Stability analysis of South slope of panzhihua Zhu mine based on kinematics[J]. Modern Mining, 2020,36(7):82-84.
[25] 张学东,刘向飞,衣雪峰,等.岩质边坡稳定性的运动学分析[J].水利水电工程设计,2017,36(2):50-53.
ZHANG Xuedong, LIU Xiangfei, YI Xuefeng, et al. Kinematic analysis of rock slope stability[J]. Design of Water Resources & Hydroelectric Engineering, 2017,36(2):50-53.
-
计量
- 文章访问数: 47
- PDF下载数: 4
- 施引文献: 0
下载: