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基于水压致裂法的三山岛深竖井工程区地应力测量与反演分析

朱明德 王照亚 张月征 李文光 侯奎奎 纪洪广 尹延天 付桢 郝英杰

朱明德,王照亚,张月征,等,2023. 基于水压致裂法的三山岛深竖井工程区地应力测量与反演分析[J]. 地质力学学报,29(3):430−441 doi: 10.12090/j.issn.1006-6616.20232911
引用本文: 朱明德,王照亚,张月征,等,2023. 基于水压致裂法的三山岛深竖井工程区地应力测量与反演分析[J]. 地质力学学报,29(3):430−441 doi: 10.12090/j.issn.1006-6616.20232911
ZHU M D,WANG Z Y,ZHANG Y Z,et al.,2023. In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing method[J]. Journal of Geomechanics,29(3):430−441 doi: 10.12090/j.issn.1006-6616.20232911
Citation: ZHU M D,WANG Z Y,ZHANG Y Z,et al.,2023. In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing method[J]. Journal of Geomechanics,29(3):430−441 doi: 10.12090/j.issn.1006-6616.20232911

基于水压致裂法的三山岛深竖井工程区地应力测量与反演分析

doi: 10.12090/j.issn.1006-6616.20232911
基金项目: 山东省自然科学基金项目(ZR2021ZD36)
详细信息
    作者简介:

    朱明德(1988—),男,硕士,主要从事岩石力学与地应力测量等相关工作。E-mail:zhumingde@sd-gold.com

    通讯作者:

    王照亚(1969—),男,高级工程师,主要从事岩石力学基础理论与岩土工程相关工作。E-mail:wangzhaoya@sd-gold.com

  • 中图分类号: P553

In-situ stress measurement and inversion analysis of the deep shaft project area in Sanshan Island based on hydraulic fracturing method

Funds: This research is financially supported by the Shandong Provincial Natural Science Foundation(Grant ZR2021ZD36)
  • 摘要:

    山东省三山岛西岭矿区拟建2000 m深副井,属于超深井建设工程。揭示建井工程区地应力场特征是开展竖井设计、建设施工的必要先决条件之一,研究中采用水压致裂法开展了深部竖井地应力现场测量工作,测量深度达到1899.00 m,通过数值仿真模拟方法反演了竖井工程区2017.56 m深的地应力场。结果表明:在水压致裂测试的钻孔357.76~1899.00 m深度范围内,最大水平主应力(SH)为23.16~70.86 MPa,最小水平主应力(Sh)为15.24~47.06 MPa;主应力随深度近于线性增加,地应力测量孔实测最大水平主应力方向分别为NW55.5°、NW60.4°、NW58.4°,为近北西方向;竖井工程区应力场主要以水平应力为主导,1200.00 m以下铅直主应力(Sv)为中间应力,SHSv之比平均值为1.53;通过FLAC 3D软件的反演分析获得了建井工程区内地应力场随深度、地层变化的分布规律,测试点的反演结果与实测值基本一致。近2000 m超深地层地应力状态及其分布规律,为竖井工程的井筒井壁设计和工程风险评估提供了基础科学依据。

     

  • 图  1  西岭副井工程地质勘察图

    Q—第四系平原区;MJ—牟平−即墨构造混杂带;JD—胶东侵入岩变质区;JB—胶北隆起;JL—胶莱塌陷区;JN—胶南隆起区

    Figure  1.  Engineering geological map of the Xiling auxiliary shaft

    Q−Quaternary plain; MJ−Muping−Jimo tectonic hybrid zone; JD−Jiaodong intrusive metamorphic zone; JB−Jiaobei uplift zone; JL−Jiaolai subsidence zone; JN−Jiaonan uplift zone

    图  2  测量典型压裂过程曲线

    1—准备施压阶段;2—施压阶段;3—压裂阶段;4—泄压阶段;5—裂纹闭合阶段;6—重新施压阶段;7—裂隙重新张开阶段;8—重新泄压阶段;9—裂纹闭合阶段

    Figure  2.  Curves of a typical fracturing process

    1–preparation for pressure application; 2–pressure application; 3–fracturing; 4–pressure relief; 5–fracture closure; 6–re-application of pressure; 7–fracture re-opening; 8–re-relief of pressure; 9–fracture closure

    图  3  单回路水压致裂地应力测量系统

    Figure  3.  Schematic diagram of the new single-loop hydrofracture in-situ stress measurement system

    图  4  测量系统的印模装置

    Figure  4.  Impression devices for measurment system

    图  5  水压致裂典型压力曲线

    Figure  5.  Typical curves of hydraulic fracturing pressure

    图  6  西岭金矿钻孔主应力值随深度变化图与应力关系图

    Figure  6.  Variation of principal stresses with depth and stress diagram in the Xiling gold deposit

    (a) Variation of principal stresses with depth; (b) Ratio of maximum principal stress to vertical stress

    图  7  地质模型图和网格细节图

    Figure  7.  Geological model map and grid details

    图  8  最大水平主应力云图

    Figure  8.  Cloud of maximum horizontal principal stress

    图  9  最小水平主应力云图

    Figure  9.  Cloud of minimum horizontal principal stress

    图  10  铅直方向主应力云图

    Figure  10.  Cloud of vertical stress

    图  11  实测值和理论计算值对比图

    Figure  11.  Comparison of measured and theoretically calculated values

    图  12  模型破坏方式模拟分析

    Figure  12.  Simulation analysis of model damage patterns

    图  13  深部地应力导致的工程灾害图

    Figure  13.  Photos of safety issues due to deep in-situ stress

    (a) Rock cake-out and fracture; (b) Large deformation in a deep channel

    表  1  三山岛金矿西岭矿区副井勘察孔水压致裂原地应力测量结果

    Table  1.   Results of hydraulic fracturing in-situ stress measurements in the borehole of the auxiliary shaft at the Xiling deposit, Sanshandao gold mine

    测段深度/m压裂参数/MPa主应力值/MPa破裂方位
    PbPrPsPoTSHShSv
    357.7620.0215.5411.733.514.4823.1615.249.47
    431.0924.5715.7811.854.228.7923.9916.0811.41
    509.3525.1520.2913.444.994.8625.0218.4313.48NW55.5°
    608.2625.1618.8214.355.966.3430.2020.3116.39
    665.3324.3421.3914.756.522.9529.3721.2717.60
    881.7030.2223.0916.298.647.1434.4224.9323.33
    957.1025.8622.5416.579.383.3336.5625.9525.32
    1010.5023.0619.1916.489.903.8740.1426.3827.23
    1097.5030.4325.7220.1910.764.7145.6230.9529.04NW60.4°
    1166.4134.8425.9420.5011.438.9046.9931.9330.86
    1220.4034.4025.3120.4411.969.0947.9632.4032.29
    1275.8032.7923.6319.5212.509.1647.4332.0234.38
    1350.0029.3021.8418.6213.237.4747.2531.8535.72
    1408.0028.0223.3619.3213.804.6648.4033.1237.26
    1473.1831.9324.0920.5914.447.8552.1235.0338.98
    1512.5031.0124.9820.7514.826.0452.1135.5840.02NW58.4°
    1594.6031.8226.5922.1215.635.2355.4037.7542.19
    1643.6338.9829.4324.7016.119.5560.7940.8144.30
    1689.5037.8328.3124.4616.569.5261.6341.0244.70
    1756.8034.8930.6526.3917.224.2465.7243.6046.48
    1792.7032.6927.7024.8317.574.9964.3742.4047.43
    1839.0037.3528.7325.4318.028.6265.5843.4549.56
    1899.0042.4733.1028.4518.619.3770.8647.0650.25
    下载: 导出CSV

    表  2  岩石物理力学实验结果统计表

    Table  2.   Statistics of the physical and mechanical measurements of rocks

    采样深度/m岩性工程岩组抗拉强度
    σt/MPa
    抗剪强度(直剪)弹性模量
    E50/×103 MPa
    泊松比
    μ50
    黏聚力
    C/MPa
    内摩擦角
    φ/(°)
    4.73~16.93 裂隙较发育,岩芯以碎块、块状为主,部分碎屑状 基岩风化带岩组 1.840 23.300 0.23
    3.980 4.14 43.60 19.700 0.30
    2.300 31.600 0.18
    38.00~55.00 裂隙较发育,岩芯以柱状为主,少量碎块 二长花岗岩岩组 6.427 10.43 59.40 3.748 0.11
    340.00~400.00 4.914 5.983 0.02
    525.00~580.00 4.493 13.00 42.83 7.689 0.27
    760.00~800.00 6.049 10.81 58.07 5.302 0.40
    935.00~1000.00 裂隙发育,岩芯以柱状、块状、碎块居多,局部小段呈碎屑状 钾化花岗岩岩组 5.350 4.39 53.11 5.500 0.05
    1000.00~1050.00 裂隙密集,岩芯以块状、碎块为主 二长花岗岩岩组 5.462 7.82 44.21 4.763 0.21
    1050.00~1064.00 裂隙发育,岩芯以块状为主,局部碎块状 绢英岩化花岗岩岩组 6.151 7.89 55.86 3.958 0.24
    1140.00~1170.00 裂隙密集,岩芯以块状为主,局部碎块状 二长花岗岩岩组 5.827 3.61 44.58 2.746 0.05
    1300.00~1400.00 5.305 6.26 45.17 1.837 0.12
    1650.00~1700.00 裂隙密集,岩芯以块状、碎块为主 绢英岩化花岗岩岩组 3.251 6.00 36.43 5.165 0.27
    1722.96~1728.16 裂隙密集,岩芯以块状、碎块为主 二长花岗岩岩组 3.380 5.17 53.50 21.800 0.20
    4.560 20.500 0.11
    4.820 26.100 0.09
    1728.66~1740.46 裂隙密集,岩芯以块状、碎块为主 绢英岩化花岗质碎裂岩岩组 3.940 7.35 54.30 36.200 0.14
    4.990 38.800 0.12
    5.830 46.300 0.05
    1740.46~1756.76 7.300 10.54 53.30 43.500 0.09
    6.680 57.300 0.13
    6.530 42.300 0.06
    1800.00~1870.00 裂隙密集,岩芯以块状、碎块为主 二长花岗岩岩组 7.360 12.20 53.40 50.500 0.10
    8.310 47.900 0.09
    9.130 48.800 0.03
    1960.00~1980.00 7.160 11.47 54.40 59.800 0.07
    8.810 45.400 0.12
    6.710 47.400 0.04
    1974.00~1983.00 裂隙发育,岩芯以块状、碎块为主,线裂隙率为10条/米左右 煌斑岩岩组 7.540 14.70 58.30 85.700 0.03
    12.000 92.200 0.09
    9.480 95.200 0.10
    1990.00~2000.00 裂隙发育,岩芯以块状、碎块为主 云英岩岩组 7.580 9.54 53.60 52.500 0.11
    5.700 63.800 0.12
    6.160 53.900 0.13
    2000.00~2015.00 2.530 2.70 45.20 9.320 0.45
    2.170 11.000 0.34
    2.940 7.950 0.24
    下载: 导出CSV
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  • 收稿日期:  2023-02-28
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