鸡西矿区浅埋煤层矿井地应力分布规律研究  

Mine crustal stress distribution law of shallow coal seams in Jixi mining area

作　　者：武龙云 WU Longyun(CCTEG Coal Mining Research Institute,Beijing 100013,China;Coal Mining and Designing Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China)

机构地区：[1]中煤科工开采研究院有限公司,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013

出　　处：《煤炭工程》2024年第9期146-151,共6页Coal Engineering

基　　金：国家自然科学基金项目(42372297);中煤科工开采研究院有限公司科技创新基金面上项目(KCYJY-2023-MS-09)。

摘　　要：为探究鸡西矿区浅埋煤层矿井地应力分布规律,采用水压致裂法在4座代表性矿井的23个测点开展地应力测试,分析了岩性对矿区地应力场分布规律的影响。结果表明:测试矿井垂直主应力比最大水平主应力要小,水平应力占地应力主要部分,构造应力场特征显著;无超高地应力场区,低、中及高地应力场区均有分布,以低及中等地应力场区为主;水平主应力总体上与埋深呈正相关关系,最小水平主应力与埋深相关性相较最大水平主应力要差;侧压比处于1.16~5.28范围且全部超过1,随埋深增加,侧压比整体逐渐减小,但离散性加强;随着埋深增加,最大、最小主应力相对差值有增大趋势,水平主应力差比逐渐接近0.5,矿井不同开采水平水平主应力差均较大。该研究成果对于鸡西矿区浅埋煤层矿井采掘工程设计及围岩控制具有重要的指导意义。To investigate the distribution law of ground stress in shallow coal seams in Jixi mining area,the hydraulic fracturing method is used to carry out ground stress testing at 23 measuring points in 4 representative mines for the analysis of mining area ground stress field distribution law on account of lithology.The results show that the vertical principal stress is smaller than the maximum horizontal principal stress,the horizontal stress is the main part of stress,and the tectonic stress field is prominent.There is no ultra-high stress field,but low,medium,high stress field are distributed,mainly low and medium stress fields.The horizontal main stress and depth are generally in positive correlation.The minimum horizontal main stress has less correlation with depth compared with the main stress.The side pressure ratios range from 1.16~5.28.With the increase of buried depth,the side pressure ratios gradually decrease,but the dispersion is strengthened.The relative difference of maximum and minimum principal stresses tends to increase,and the horizontal principal stress difference ratio gradually approaches 0.5.The horizontal principal stress differences at different mining levels are large.The research results have an important guidance for mining engineering design and surrounding rock control in shallow coal seams in Jixi mining area.

关 键 词：鸡西矿区 浅埋煤层矿井 水压致裂 原岩应力 

分 类 号：TD353[矿业工程—矿井建设]