煤矿井下地应力数据库及地应力影响因素研究
发布时间：2019-06-15 01:00
【摘要】：本文搜集了我国煤矿井下1357条地应力资料,其中包括406条应力解除资料和951条水压致裂资料,地应力资料以小孔径水压致裂地应力数据为基础。在此基础上编制了"中国煤矿应力环境数据库"。基于数据库中煤矿井下实测地应力数据,采用理论分析、数理统计和数值模拟等研究方法对我国煤矿井下地应力的分布规律和主要影响因素展开了细致的研究;选取典型矿区,对煤矿井下地应力场反演进行了初步探索。通过本文的研究,取得了如下成果:(1)基于搜集的煤矿井下地应力数据,编制了"中国煤矿应力环境数据库",对于煤矿井下地应力数据可以进行精确快速查询,结果以地应力地图的形式进行展示,实现了地应力数据的可视化查询。同时,绘制了中国大陆分区煤矿地应力地图和中国煤矿矿区地应力地图。(2)建立了煤矿井下几组典型特征参数随埋深变化的散点图并进行了回归分析。其中,最大、最小水平主应力和垂直应力随埋深变化的线性回归公式:σH=3.267 + 0.0215H;σh= 1.954+ 0.0113H;σV= 0.0245H。最大、平均和最小水平主应力侧压比随埋深变化的回归公式为:KH=160.35/K/+ 0.801;Kav = 129.58/H + 0.606;Kh=99.86/H + 0.405。通过这些特征参数,对煤矿井下地应力分布规律进行了系统研究。(3)在数据库中选取了 42组粉砂岩地应力数据,136组细砂岩地应力数据,99组泥质地应力砂岩数据和90组泥岩地应力数据,建立了不同岩性的最大、最小水平主应力和水平剪应力以及平均水平主应力侧压比随埋深的散点图并进行了回归分析,研究了岩性对于地应力分布的影响。(4)在数据库中选取了 77组含有测点煤岩体弹性模量和泊松比的地应力数据资料,建立了这些地应力数据的最大、最小水平主应力和垂直应力与埋深和弹性模量的多元线性回归公式:σH= 0.0015 + 0.0366H + 0.015E;σH= 0.024 +0.0186H-0.00099E;σV= 0.327 + 0.0226H-0.0106E。建立了水平剪应力和最大主应力差与埋深H和弹性模量E的多元线性回归公式:σ1-3 = 0.275 + 0.018H +0.0205E。通过多元回归和拟合对Sheorey的平均水平主应力侧压比理论公式进行了参数修正的研究。(5)针对煤矿井下地应力与断层滑动判别依据展开了讨论,给出了地应力与断层滑动关系研究的三种模式:逆正型断层滑动最大最小水平主应力模式、断层摩擦滑动最大主应力差模式和莫尔应力圆临界切线模式。(6)以潞安常村煤矿为背景,通过数值模拟对常村煤矿应力场进行了反演。现场实测数据和数值模拟结果具有比较好的一致性。同时,根据地应力反演结果分析了断层和褶曲等地质构造对于构造应力场的影响。
[Abstract]:In this paper, 1357 ground stress data in coal mines in China are collected, including 406 stress relief data and 951 hydraulic fracturing data. The ground stress data are based on the ground stress data of small aperture hydraulic fracturing. On this basis, the database of coal mine stress environment in China is compiled. Based on the measured ground stress data in coal mine database, the distribution law and main influencing factors of underground ground stress in coal mine in China are studied in detail by means of theoretical analysis, mathematical statistics and numerical simulation, and the inversion of underground ground stress field in coal mine is preliminarily explored by selecting typical mining areas. Through the research of this paper, the following results have been obtained: (1) based on the collected ground stress data of coal mine, the "China Coal Mine stress Environment Database" is compiled. The ground stress data of coal mine can be queried accurately and quickly. The results are displayed in the form of ground stress map, and the visual query of ground stress data is realized. At the same time, the geostress map of divided coal mines in mainland China and the geostress map of coal mining areas in China are drawn. (2) the scattered point maps of several groups of typical characteristic parameters in coal mines with buried depth are established and regression analysis is carried out. Among them, the linear regression formulas of maximum, minimum horizontal principal stress and vertical stress with buried depth are as follows: 蟽 H 鈮，
本文编号：2499845
[Abstract]:In this paper, 1357 ground stress data in coal mines in China are collected, including 406 stress relief data and 951 hydraulic fracturing data. The ground stress data are based on the ground stress data of small aperture hydraulic fracturing. On this basis, the database of coal mine stress environment in China is compiled. Based on the measured ground stress data in coal mine database, the distribution law and main influencing factors of underground ground stress in coal mine in China are studied in detail by means of theoretical analysis, mathematical statistics and numerical simulation, and the inversion of underground ground stress field in coal mine is preliminarily explored by selecting typical mining areas. Through the research of this paper, the following results have been obtained: (1) based on the collected ground stress data of coal mine, the "China Coal Mine stress Environment Database" is compiled. The ground stress data of coal mine can be queried accurately and quickly. The results are displayed in the form of ground stress map, and the visual query of ground stress data is realized. At the same time, the geostress map of divided coal mines in mainland China and the geostress map of coal mining areas in China are drawn. (2) the scattered point maps of several groups of typical characteristic parameters in coal mines with buried depth are established and regression analysis is carried out. Among them, the linear regression formulas of maximum, minimum horizontal principal stress and vertical stress with buried depth are as follows: 蟽 H 鈮，
本文编号：2499845
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