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平顶山矿区地应力场分布特征研究

李培涛1, 范利丹1, 余永强1, 张建国1, 朱元广2, 张纪云1

1.河南理工大学 土木工程学院 河南 焦作  454003；2.中国科学院武汉岩土力学研究所 岩土力学与工程国家重点实验室，湖北 武汉  430071

摘要: 目的 为探究平顶山矿区深部地应力场分布规律，开展平顶山矿区地应力场分布特征研究。  方法 在分析矿区地质构造特征基础上，提出以主控地质构造锅底山断层和李口向斜为边界的区域构造单元划分方法。然后，基于Hoek-Brown强度准则推导出可以定量反映区域地质构造对深部地应力场影响的侧压比分析曲线。  结果 结果表明，各区域构造单元受不同区域地质构造影响呈明显不同的深部地应力分布规律。西部区域构造单元内深部地应力以正断层应力状态为主，中部区域同时存在3种应力状态，东部区域以走滑型应力状态和逆断层应力状态为主。垂直应力在不同区域构造单元内均随埋深呈线性增大。最大水平主应力均值、变化范围和应力梯度均呈从西向东逐渐增大趋势。同时，侧压比变化范围和幅值也呈从西向东逐渐增大趋势，这表明从矿区西部到东部区域水平地质构造作用越来越强烈。区域地质构造影响分析结果也表明矿区深部地应力场分布特征服从区域地质构造演化规律。其中，东部区域构造应力场影响系数最大，为1.07，中部区域次之，为0.55，西部区域最小。  结论 基于侧压比分析曲线的区域地质构造影响评价方法适用于平顶山矿区深部地应力场分析。

关键词:地质构造;地应力场;分布规律;侧压比;平顶山矿区

doi:10.16186/j.cnki.1673-9787.2024010048

基金项目:国家自然科学基金资助项目（52208244）；河南省自然科学基金资助项目（252300423400）

收稿日期:2025/03/21

修回日期:2025/05/09

出版日期:2026/01/28

Distribution characteristics of the in-situ stress field in the Pingdingshan Mining Area

Li Peitao1, Fan Lidan1, Yu Yongqiang1, Zhang Jianguo1, Zhu Yuanguang2, Zhang Jiyun1

1.School of Civil Engineering， Henan Polytechnic University， Jiaozuo  454003， Henan， China；2.State Key Laboratory of Geomechanics and Geotechnical Engineering， Institute of Rock and Soil Mechanics， Chinese Academy of Sciences， Wuhan  430071， Hubei， China

Abstract: Objectives The distribution characteristics of the deep in-situ stress field in the Pingdingshan mining area is to be investigated.  Methods Based on an analysis of geological structure，a new method for delineating regional tectonic units was proposed using the main controlling structures—the Guodishan Fault and the Likou Syncline—as boundaries. Then， an analysis curve for the lateral pressure ratio was derived from the Hoek-Brown strength criterion to quantitatively assess the influence of regional geological tectonic on deep in-situ stress field. Results The results show that the deep in-situ stress field in each regional unit， influenced by different geological structures， exhibits different distribution patterns. The stress state in the western unit is predominantly normal faulting. Three kinds of stress states coexist in the central unit. The eastern unit is characterized mainly by the strike-slip and reverse faulting stress state. The vertical stress increases linearly with depth in all regional units. The mean value， variation range， and stress gradient of the maximum horizontal principal stress all increase from the west to the east. Similarly， the range and amplitude of the lateral pressure ratio increase from the west to the east， indicating that horizontal tectonic activity intensifies from the western to the eastern part ofthe mining area. The analysis of regional geological structures further reveals that the distribution of deep in-situ stress field follows the regional tectonic evolution law. The analysis of regional geological structures further reveals that the distribution of the deep in-situ stress field follows the regional tectonic evolution pattern. Specifically， the influence coefficient of regional tectonic stress field is highest in the eastern region （1.07）， followed by the central region （0.55） and lowest in the western region.  Conclusions Therefore， the evaluation method for regional geological structures based on the lateral pressure ratio analysis curve is applicable to the study of deep in-situ stress fields in the Pingdingshan Mining Area.

Key words: geological structure; in-situ stress field; distribution characteristics; lateral pressure ratio; Pingdingshan Mining Area