The Characteristics of Geostress and Its Geological Engineering Significance of Underground Water-sealed Cavern
-
摘要: 基于水压致裂地应力测量数据，研究了某地下水封洞库库址区的地应力发育特征，并结合数值模拟成果对洞室轴向的选择进行了验证。结果表明：（1）最大水平主应力方位为NWW向，且随埋深的增大，最大水平主应力有向东偏转的趋势；（2）现今地应力场为典型的构造应力场类型，以逆断层应力机制为主；（3）最大和最小水平主应力随埋深均呈线性增加趋势；（4）侧压系数位于中国大陆包络线内，表现出“浅部离散，深部收敛”的特征；（5）最大水平主应力为最大主应力，垂向主应力为最小主应力，最小水平主应力为中间主应力；（6）受最大水平主应力及优势结构面方向的影响，洞室轴向建议选择N55°W。Abstract: The geostress characteristics of one underground water-sealed cavern was investigated based on geostress data collected by hydraulic fracturing, and the axis direction of the cavern was testified by numerical simulation results. The results shows that: (1) the direction of regional maximum principal stress is NWW, and the regional maximum principal stress shows a tendency deflecting to the east as the depth increases; (2) the current stress field is one of the typical tectonic stress field, which is dominated by reverse fault stress mechanism; (3) both maximum and minimum horizontal principal stress show a linear rise with depth; (4) the coefficient of horizontal pressure lies within the envelope line of Chinese Mainland, showing the trait of dispersion in the shallow and convergence in the deep; (5) with the maximum horizontal principal stress being the maximum principal stress and the vertical principal stress being the minimum principal stress, the minimum horizontal principal stress is the intermediate principal stress; (6) the axis direction of the cavern is recommended as N55°W considering the influence of the maximum horizontal principal stress and preferred structural plane.
-
表 1 地应力测量结果
孔号 测点埋深/m σhmax/MPa σhmin/MPa σv/MPa 破裂方向 ZK1 124.8 8.09 6.28 3.37 133.6 8.82 6.04 3.61 141.8 9.85 7.76 3.83 N59°W 151.5 8.55 6.42 4.09 ZK2 96.5 5.17 4.02 2.61 106.4 6.50 3.98 2.87 119.1 9.68 6.94 3.22 N60°W 130.3 8.52 6.43 3.52 140.0 9.14 7.25 3.78 151.1 8.05 6.68 4.08 N54°W 161.8 9.55 7.85 4.37 168.0 9.87 6.87 4.54 
下载: 导出CSV
表 2 优势结构面产状
编号 优势产状 备注 J1 N15°E，SE∠47° 数字成像解译节理 J2 N20°W，NE∠48° 数字成像解译节理 J3 N32°E，NW∠55° 数字成像解译节理 J4 N88°E，SE∠50° 数字成像解译节理
下载: 导出CSV
-
[1] 陈 奇,武 强,李俊彦. 地下水封石洞油库地质灾害危险性评估−以山东某地下水封石洞油库工程为例[J]. 中国地质灾害与防治学报,2006,17(4):138-141. doi: 10.3969/j.issn.1003-8035.2006.04.029 [2] 戚 蓝,马启超. 在地应力场分析的基础上探讨地下洞室长轴向选取和围岩稳定性[J]. 岩石力学与工程学报,2000,19(S1):1120-1123. [3] 曹洋兵,陈玉华,黄真萍,等. 地下水封洞库洞室轴线方向优化方法[J]. 长江科学院院报,2019,36(5):155-162. [4] 王成虎,刘立鹏,郭启良,等. 地应力测量数据分析及对工程稳定性控制设计的意义[J]. 工程地质学报,2008,16(增刊):377-381. [5] 陈 祥,孙进忠,张杰坤,等. 黄岛地下水封石油洞库场区地应力场模拟分析[J]. 岩土工程学报,2009,31(5):713-719. doi: 10.3321/j.issn:1000-4548.2009.05.012 [6] 王章琼,晏鄂川,季惠斌. 黄岛地下水封油库地应力场及地质构造作用分析[J]. 工程地质学报,2016,24(1):136-141. [7] 徐 彬,李仲奎. 地下水封石油洞库初始地应力回归分析[J]. 工程地质学报,2018,26(5):1390-1396. [8] 栾光忠,王红霞,尹明泉,等. 青岛城市主要断裂构造特征以及对城市地质环境的影响[J]. 地球学报,2010,31(1):102-108. [9] BROWN E T,HOEK E. Trends in relationships between measured in-situ, stresses and depth[J]. International Journal of Rock Mechanics & Mining Sciences & Geomechanics Abstracts,1978,15(4):211-215. [10] 杨树新,姚 瑞,崔效锋,等. 中国大陆与各活动地块、南北地震带实测应力特征分析[J]. 地球物理学报,2012,55(12):4207-4217. doi: 10.6038/j.issn.0001-5733.2012.12.032 [11] 贺振鹏,王泽利,宋矿银,等. 烟台地下水封洞库工程区地应力场数值模拟[J]. 科学技术与工程,2019,19(21):63-70. doi: 10.3969/j.issn.1671-1815.2019.21.010 [12] 李永松,尹健民,艾 凯,等. 深圳抽水蓄能电站地应力测试分析及其在地下硐室设计中的应用[J]. 岩石力学与工程学报,2006,25(S2):3965-3970. -
图(9) / 表(2)
计量
- 文章访问数: 156
- HTML全文浏览量: 37
- PDF下载量: 35
- 被引次数: 0
