Integrated prediction for rockburst of underground powerhouse of Houziyan hydropower station
-
摘要: 中国西南地区在建的猴子岩水电站地下厂房,具有高边墙大跨度的特点。且位于高地应力区,实测最大主应力值高达36.43 MPa。地下厂房区域的灰岩坚硬完整、脆性程度高,具备高储能条件,在施工开挖扰动因素下有可能发生岩爆动力地质灾害。依照岩爆综合预测研究的思路,结合前期猴子岩水电站地下洞室群岩爆倾向性研究,开展岩爆趋势预测研究。建立三维有限元计算模型,根据实测地应力资料进行初始地应力场拟合,模拟猴子岩水电站地下洞室群分步开挖过程,选择王兰生二郎山隧道判据进行岩爆趋势预测。通过分析主厂房、主变室、尾调室三大洞室分步开挖过程中的岩爆趋势预测情况可知：猴子岩地下洞室群开挖过程中主要发生轻微岩爆,个别区域可能发生中等岩爆,与实际情况相比仍有一定差异。同时,归纳已有的多种岩爆预测判据,结合大量工程资料,对岩爆判据的适用性进行系统探讨。研究表明,单一判据在工程中有较大的局限性,预测结果与实际情况有较大偏差;而五因素综合判据则能较准确地反映工程的岩爆情况。Abstract: The underground powerhouse of Houziyan hydropower station under construction in southwest China has the characteristics of a large span and high sidewall. It lies in high geo-stress regions and its maximum measured geo-stress has reached to 36.43 MPa. The complete and hard limestone in this region has a high brittleness and provides a high energy storage condition, which is possible to result in dynamic geological disasters like rockburst because of the excavation disturbance. Based on the integrated prediction approach for rockburst, a research on rockburst tendency is conducted. Considering the strict simulation of topographical and geological conditions, a three-dimensional finite element model for Houziyan underground powerhouse is established. Then the step-by-step excavation process of underground powerhouse is simulated. And the initial geo-stress regression analysis is finished using method of back analysis. Wang Lansheng criterion is selected to evaluate the rockburst tendency. The rockburst tendency prediction of main powerhouse, main transformer chamber and tailrace surge chamber during step-by-step excavation process are analyzed. The results show that the light rockburst occurs during excavation of the underground caverns, and medium rockburst only happens in some areas. There are still some differences between the predicted results and the real situations. At the same time, a summary on various criteria of rockburst prediction and a discussion on the applicability of these criteria based on the existing engineering data are also carried out. It is indicated that there are some limitations using a single criterion to predict the actual projects. The predicted results by using five-factor rockburst criterion can reflect the actual situation more accurately.
-
[1] 张镜剑, 傅冰骏. 岩爆及其判据和防治[J]. 岩石力学与工程学报, 2008, 27(10): 2034-2042. (ZHANG Jing-jian, FU Bing-jun. Rockburst and its criteria and control[J]. Chinese Journal of Rock Mechanics and Engineering, 2008, 27(10): 2034-2042. (in Chinese)) [2] 徐林生, 王兰生, 李永林. 岩爆形成机制与判据研究[J]. 岩土力学, 2002, 23(3): 300-303. (XU Lin-sheng, WANG Lan-sheng, LI Yong -lin. Study on mechanism and judgement of rockbursts[J]. Rock and Soil Mechanics, 2002, 23(3): 300-303. (in Chinese)) [3] 张艳飞, 李治国, 张 茹, 等. 猴子岩水电站地下厂房岩爆倾向性研究[J]. 西南交通大学学报, 2013, 48: 42-49. (ZHANG Yan-fei, LI Zhi-guo, ZHANG Ru, et al. Rockburst tendency research in underground powerhouse of Houziyan hydropower station[J]. Journal of Southwest Jiaotong University, 2013, 48: 42-49. (in Chinese)) [4] 郭怀志, 马启超, 薛玺成, 等. 岩体初始地应力场的分析方法[J]. 岩土工程学报, 1983, 5(3): 64-75. (GUO Huai-zhi, MA Qi-chao, XUE Xi-cheng, et al. The analytical method of the initial stress field for rock masses[J]. Chinese Journal of Geotechnical Engineering, 1983, 5(3): 64-75. (in Chinese)) [5] 何江达, 谢红强, 王启智, 等. 官地水电站坝址区初始地应力场反演分析[J]. 岩土工程学报, 2009, 31(2): 166-171. (HE Jiang-da, XIE Hong-qiang, WANG Qi-zhi, et al. Inversion analysis of initial geostress in dam site of Guandi hydropower project[J]. Chinese Journal of Geotechnical Engineering, 2009, 31(2): 166-171. (in Chinese)) [6] 陈卫忠, 吕森鹏, 郭小红, 等. 基于能量原理的卸围压试验与岩爆判据研究[J]. 岩石力学与工程学报, 2009, 28(8): 1530-1540. (CHEN Wei-zhong, LU Sen-peng, GUO Xiao-hong, et al. Reasearch on unloading confining pressure tests and rockbhurst criterion based on energy theory[J]. Chinese Journal of Rock Mechanics and Engineering, 2009, 28(8): 1530-1540. (in Chinese)) [7] HE Man-chao, SOUSA R E, MIRANDA T, et al. Rockburst laboratory testsdatabase-Application of data mining techniques[J]. Engineering Geology, 2015, 185: 116-130. [8] 谷明成, 何发亮, 陈成宗. 秦岭隧道岩爆的研究[J]. 岩石力学与工程学报, 2002, 21(9): 1324-1329. (GU Ming-cheng, HE Fa-liang, CHEN Cheng-zong. Study on rockburst in Qingling tunnel[J]. Chinese Journal of Rock Mechanics and Engineering, 2002, 21(9): 1324-1329. (in Chinese)) [9] ZHANG Jing-jian, FU Bing-jun, LI Zhong-kui, et al. Criterion and classification for strain mode rockbursts based on five-factor comprehensive method[J]. News Journal of Rock Mechanics and Engineering, 2011, 88(1): 27-37. [10] 王兰生. 二郎山隧道高地应力与围岩稳定问题[M]. 北京:地质出版社, 2006. (WANG Lan-sheng. High geostress and surrounding rock stability in Erlang-mountain highway tunnel[M]. Beijing: Geological Publishing House, 2006. (in Chinese)) [11] 武选正, 李名川, 伍宇腾. 锦屏水电枢纽辅助洞工程岩爆现象分析及防治措施[J]. 山东大学学报(工学版), 2008, 38(3): 28-33. (WU Xuan-zheng, LI Ming-chuan, WU Yu-teng. Analysis and prevention measures for rock-burst in the auxiliary tunnel of the Jinping hydropower state[J]. Journal of Shandong University (Engineering Science), 2008, 38(3): 28-33. (in Chinese)) -
期刊类型引用(7)
1. 胡亚元，袁书行. 盐溶液饱和岩土的本构理论及在黏土中的应用. 岩土工程学报. 2024(02): 223-234 . 
本站查看
2. 赵兴东. 黄金矿山深井开采研究进展与发展趋势. 黄金. 2024(08): 1-18 . 百度学术
3. 张菂，李源，张伟，赵伟乔，秦忠培，郭少峰. 2023年8月西代村跨断层短水准异常分析. 地震地磁观测与研究. 2024(06): 83-91 . 百度学术
4. 张根宝，张超，白允，杨楚卿. 空隙岩石非线性变形细观唯象分析及本构模型. 公路交通科技. 2023(02): 135-144 . 百度学术
5. 贺文海，王恒，赵佳鑫. 矿井辅助运输巷道底板数学模型构建及其力学特性研究. 煤炭技术. 2023(08): 17-21 . 百度学术
6. 胡亚元，周焕慧. 饱和块状混合回填土地基的一维固结分析. 岩土工程学报. 2022(04): 632-642 . 本站查看
7. 刘武，过申磊，陆倩，郑连阁，袁文俊. 基于TOUGHREACT的岩石水力损伤耦合数值模型研究. 岩土工程学报. 2021(07): 1306-1314+1380 . 本站查看
其他类型引用(9)
计量
- 文章访问数: 314
- HTML全文浏览量: 3
- PDF下载量: 480
- 被引次数: 16
下载:
