煤矿安全2024，Vol.55Issue(10)：91-99,9.DOI:10.13347/j.cnki.mkaq.20240531
基于Kaiser效应的地应力差应变测试及区域地应力分布研究
In-situ stress measurement based on Kaiser effect and differential strain analysis method and regional in-situ stress distribution research
摘要
Abstract
In previous practice,the differential strain analysis(DSA)method,relied upon for estimating vertical principal stress to re-solve geological stress,has shown limitations in reliability.Drawing upon observations of the Kaiser effect in rock samples,we intro-duce the Kaiser-differential strain analysis(Kaiser-DSA)method,amalgamating the Kaiser effect with the DSA method to assess in-situ stress differentials.Comparative evaluation with the stress relief method reveals that the Kaiser-DSA method demonstrates min-imal relative error and generally consistent orientation of the maximum horizontal principal stress.Utilizing the findings from in-situ stress testing,this investigation scrutinizes the distribution patterns of in-situ stress in Yaojie Mining Area and investigates the caus-ative factors contributing to the prevailing in-situ stress field.The study elucidates that Yaojie Mining Area is subject to the influ-ence of compressive tectonic stress fields,resulting in elevated residual stress.Influenced by the Qinghai-Tibet thrust nappe action and the clockwise shear action of the F19 fault,the geostress field in this region predominantly manifests a strike-slip stress state typi-fied by σH>σv>σh.Furthermore,the heightened differential stress within this locale exacerbates deformation and damage to the sur-rounding rock mass during mining activities,thereby exacerbating the frequency of dynamic disaster events.关键词
Kaiser效应/差应变分析/地应力测试/窑街矿区/区域构造演化Key words
Kaiser effect/differential strain analysis/in-situ stress measurement/Yaojie Mining Area/regional tectonic evolution分类
矿业与冶金引用本文复制引用
赵龙,乔伟,程香港,贺虎,孟祥胜,张玉生,孙文杰,任洋洋,肖冲..基于Kaiser效应的地应力差应变测试及区域地应力分布研究[J].煤矿安全,2024,55(10):91-99,9.基金项目
国家自然科学基金资助项目(41772302) （41772302）
江苏高校优势学科建设工程资助项目 （）
