| 蒙山断裂地应力特征及其稳定性分析 |
| |
| 引用本文： | 李兵,郭启良,王建新,胡秀宏,丁立丰,许俊闪.蒙山断裂地应力特征及其稳定性分析[J].岩土力学,2014,35(Z2):501-507. |
| |
| 作者姓名： | 李兵 郭启良 王建新 胡秀宏 丁立丰 许俊闪 |
| |
| 作者单位： | 中国地震局地壳应力研究所 地壳动力学重点实验室，北京 100085 |
| |
| 基金项目： | 中央级公益性科研院所基本科研业务专项(No. ZDJ2011-10)；中国国土资源部公益性行业专项(No. 201211076)。 |
| |
| 摘 要： | 蒙山断裂带是沂沭断裂（郯庐断裂带山东段）西侧的一条北西向断裂，控制着长清-临沂中强地震带，该蒙山断裂带的地应力状态对研究山东中部地震活动的危险性有重要的意义。在蒙山断裂附近开展了2个深孔的水压致裂地应力测量，得到最大水平主应力SH为7.0～17.0 MPa，最小水平主应力Sh为5.0～11.0 MPa。测量结果显示，300 m以上的三向主应力的相对大小表现为SH＞Sv≥Sh（Sv为垂直主应力）；400～450 m范围内，三向主应力相对大小表现为SH＞Sv＞Sh；最大水平主应力的方向为NE-NEE，与利用其他资料得到的结果一致；实测资料得到侧压力系数K的平均值，ZK134孔KHmax=1.54（KHmax为最大水平侧压系数），ZK8孔KHmax=1.38。根据Byerlee定律判定蒙山断裂处于相对稳定的地应力状态，2个孔的? m(最大剪应力与平均主应之比)在2010－2011年间几乎没有变化，亦表明该断层处在一个稳定的状态。
|
| 关 键 词： | 蒙山断裂 地应力状态 Byerlee定律 最大剪应力与平均主应之比 |
| 收稿时间： | 2013-11-04 |
Characteristics of in-situ stress at Mengshan fault and its stability analysis |
| |
| LI Bing,GUO Qi-liang,WANG Jian-xin,HU Xiu-hong,DING Li-feng,XU Jun-shan.Characteristics of in-situ stress at Mengshan fault and its stability analysis[J].Rock and Soil Mechanics,2014,35(Z2):501-507. |
| |
| Authors: | LI Bing GUO Qi-liang WANG Jian-xin HU Xiu-hong DING Li-feng XU Jun-shan |
| |
| Institution: | Key Laboratory of Crustal Dynamics, Institute of Crustal Dynamics, China Earthquake Administration, Beijing 100085, China |
| |
| Abstract: | As a north-westward fault zone located at the Western side of Yishu fault (in Shandong section of Tan-Lu fault zone) controlling Changqing-Linyi moderately strong seismic belt, the in-situ stress state presented in Mengshan fault zone plays an important role in the hazard research on the seismic activities in central Shandong. The hydraulic fracturing stress measurements of two deep boreholes located in the vicinity of Mengshan fault zone have been carried out; resulting in the maximum horizontal principal stress SH as 7.0-17.0 MPa and the minimum horizontal principal stress Sh as 5.0-11.0 MPa. The measurement results show that the relative size of triaxial principal stress at the depth over 300 m tends to SH＞Sv≥Sh, and that tends to SH＞Sv＞Sh in the range of the depth between 400 to 450 m. The direction of the maximum horizontal principal stress presents NE-NEE, which is consistent with results acquired from other data. The average values of the lateral pressure coefficient obtained by measured data are maximum lateral pressure coefficient KHmax=1.54 at Borehole ZK134 and KHmax=1.38 at Borehole ZK8. According to Byerlee’s law, Mengshan fault zone lies in a relatively stable in-situ stress state, ? m (the ratio of the maximum shear stress to the average principal stress) presented in two boreholes shows little change between the years of 2010 and 2011 indicating that the fault zone is in a steady state at the moment. |
| |
| Keywords: | Mengshan fault zone in-situ stress sate Byerlee's law ratio of the maximum shear stress to average principal stress |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《岩土力学》浏览原始摘要信息 |
| 点击此处可从《岩土力学》下载免费的PDF全文 |
