某矿山地应力测试结果及建模反演分析  

In-situ Stress Test Results and Modeling Inversion Analysis of a Mine

作　　者：孙健 安晶 宫长亮 陈小伟[2,3] 张磊[1] 张少杰 张建立[1] 谢盛青 巨有[3] SUN Jian;AN Jing;GONG Changliang;CHEN Xiaowei;ZHANG Lei;ZHANG Shaojie;ZHANG Jianli;XIE Shengqing;JU You

机构地区：[1]鞍钢集团矿业有限公司大孤山分公司,辽宁鞍山114046 [2]中国恩菲工程技术有限公司,北京100038 [3]北京科技大学,北京100083

出　　处：《中国矿山工程》2023年第3期34-39,共6页China Mine Engineering

摘　　要：采用水压致裂法对某矿山进行地应力测试,基于现场实测数据,对地应力大小与埋深的关系进行分析,得到该矿山地应力的分布规律和变化特征。使用有限差分法软件FLAC对矿区地应力场进行反演模拟,模拟结果用来验证地应力现场实测结果的准确性。地应力实测结果表明:该矿区的地应力以水平构造应力为主,平均最大水平主应力方向为N 62.6°E;矿区最大、最小水平主应力以及垂直应力均随着深度的增加而增大;最大水平主应力与垂直应力的平均比值为2.42,最小水平主应力与垂直应力的平均比值为1.49。数值模拟结果表明:孔底监测点地应力反演值与实测值之间最大误差为最大水平主应力的-13.9%,误差大小在合理范围内,验证了现场实测数据的准确性与反演模拟的可靠性,为矿山后续工作提供数据基础。The hydraulic fracturing method was used to conduct in-situ stress testing at a certain mine.Based on the measured data,the relationship between the magnitude of the in-situ stress and depth was analyzed,and the distribution law and variation characteristics of in-situ stress in the mine were obtained.The FLAC finite difference software was used to perform inversion simulation on the mining area,and the simulation results were used to verify the accuracy of the in-situ stress measurement results.The in-situ stress measurement results showed that the in-situ stress in the mining area was mainly composed of horizontal structural stress,with an average maximum horizontal principal stress direction of N 62.6°E.The maximum and minimum horizontal principal stresses and the vertical stress in the mining area all increased with depth.The average ratio of the maximum horizontal principal stress to the vertical stress was 2.42,and the average ratio of the minimum horizontal principal stress to the vertical stress was 1.49.The numerical simulation results showed that the maximum error between the inverted value of in-situ stress at the hole bottom monitoring point and the measured value was-13.9%of the maximum horizontal principal stress.The error was within a reasonable range,which verified the accuracy of the in-situ measurement data and the reliability of the inversion simulation,providing a data basis for subsequent work at the mine.

关 键 词：地应力测试 FLAC模拟 水压致裂 地应力分布规律 

分 类 号：TD163[矿业工程—矿山地质测量]