Multi-scale geological modeling and in-situ stress inversion of Xincheng Gold Mine at the Jiaodong Peninsula, China

IF 3.7 2区 工程技术 Q3 ENGINEERING, ENVIRONMENTAL Bulletin of Engineering Geology and the Environment Pub Date : 2024-11-12 DOI:10.1007/s10064-024-03982-6
Jiangmei Wang, Wancheng Zhu, Xige Liu, Jiateng Guo, Jiazhao Yan
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Abstract

The Jiaodong Peninsula in China is rich in metal deposits, but its geological setting is very complex. To ensure the stability of metal mining-induced excavations of the study area, it is necessary to understand the development of regional structures and the distribution of stress fields. Considering the multi-scale characteristics of geological objects, we conducted multi-scale 3D geological modeling and in situ stress inversion from regional large-scale (100km), regional medium-scale (10km), and engineering scale (km) to obtain the in situ stress distribution of several mine areas (Xincheng, Tengjia, and Hongbu mining areas) at the Xincheng Gold Mine, in the Jiaodong Peninsula region and guide engineering practice. The Hermite Radial Basis Function (HRBF) is adopted to obtain multi-scale geological models including small faults, surrounding rocks, and ore bodies by using regional field survey data, exploration profiles, and boreholes. Then, through several groups of measured in situ stress data, multi-scale in situ stress field inversion is carried out by adopting the multiple linear regression method. Then, the distribution of the in situ stress field is analyzed. In this paper, each smaller-scale 3D modeling and in situ stress inversion is refined and corrected based on the larger-scale modeling and inversion. The results show that the calculated in situ stress of multi-scale inversions is more accurate, which verifies the practicability and effectiveness of the multi-scale modeling and in situ stress inversion. Therefore, compared with the single-scale geological model and inversion, the multi-scale model and inversion can predict the in situ stress distribution of rock engineering more accurately.

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中国胶东半岛新城金矿多尺度地质建模与原位应力反演
中国胶东半岛蕴藏着丰富的金属矿藏,但其地质环境却十分复杂。为确保研究区金属矿诱发采空区的稳定性,有必要了解区域构造的发展和应力场的分布。考虑到地质对象的多尺度特征,我们从区域大尺度(100km)、区域中尺度(10km)和工程尺度(km)进行了多尺度三维地质建模和原位应力反演,获得了胶东半岛地区新城金矿多个矿区(新城矿区、滕家矿区和红埠矿区)的原位应力分布,并指导了工程实践。利用区域野外测量数据、勘探剖面和钻孔,采用Hermite径向基函数(HRBF)获得包括小断层、围岩和矿体在内的多尺度地质模型。然后,通过多组实测原位应力数据,采用多元线性回归方法进行多尺度原位应力场反演。然后,分析原位应力场的分布。本文在大尺度建模和反演的基础上,对每个小尺度三维建模和原位应力反演进行了细化和修正。结果表明,多尺度反演计算的原位应力更为精确,验证了多尺度建模和原位应力反演的实用性和有效性。因此,与单尺度地质模型和反演相比,多尺度模型和反演能更准确地预测岩石工程的原位应力分布。
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来源期刊
Bulletin of Engineering Geology and the Environment
Bulletin of Engineering Geology and the Environment 工程技术-地球科学综合
CiteScore
7.10
自引率
11.90%
发文量
445
审稿时长
4.1 months
期刊介绍: Engineering geology is defined in the statutes of the IAEG as the science devoted to the investigation, study and solution of engineering and environmental problems which may arise as the result of the interaction between geology and the works or activities of man, as well as of the prediction of and development of measures for the prevention or remediation of geological hazards. Engineering geology embraces: • the applications/implications of the geomorphology, structural geology, and hydrogeological conditions of geological formations; • the characterisation of the mineralogical, physico-geomechanical, chemical and hydraulic properties of all earth materials involved in construction, resource recovery and environmental change; • the assessment of the mechanical and hydrological behaviour of soil and rock masses; • the prediction of changes to the above properties with time; • the determination of the parameters to be considered in the stability analysis of engineering works and earth masses.
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