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新疆克孜尔水库F2活断层活动特征分析 *
引用本文:李斌,夏新利,崔龙,翟世龙,黄静,王爱倩,徐永龙.新疆克孜尔水库F2活断层活动特征分析 *[J].力学学报,2009,17(6):780-787.
作者姓名:李斌  夏新利  崔龙  翟世龙  黄静  王爱倩  徐永龙
作者单位:(.长安大学 地质工程与测绘学院,陕西 西安 710054) (.新疆克孜尔水库管理局,新疆 拜城 842300) (.新疆农业大学 水利与土木工程学院,新疆 乌鲁木齐 830052)
摘    要:摘 要 新疆克孜尔水库区内F2活断层的活动规律对水库的安全性有重要影响,对F2断层短水准长序列的观测分析表明:F2断层下盘近40年来持续发生着由南向北的地倾运动。这既影响了短水准高差计算结果,也影响了位错模型水平扭动量和滑动角两个用于评价断层活动性的参数的计算结果,从而使F2断层活动性评价失去客观性。本文通过第1形变监测站人工短水准前尺读数长序列走势分析获得F2活断层下盘测线方向上12米处地倾活动的年变速率(1979-2006)为0.224mm/a,根据库区F2活断层两侧地表沉降速率等值线图确定、验证第1形变监测站上、下盘测线方向上地倾活动年变速率(1991-2002)分别是0.03mm/a、0.07mm/a。对水平扭动量和滑动角的计算和分析表明:F2活断层近10余年来的活动虽与水库蓄水、库水沿活断层下渗、河流改道及地壳运动关系密切,但尚无法认定其活动正在或已经加剧。

关 键 词:F2活断层  短水准高差  沉降速率场  地倾速率  断层位错模型  断层活动特征

DISCUSSIONS ON ACTIVITY OF FAULT F2 AT KIZIL RESERVOIR IN XINJIANG
LI Bin〓XIA Xinli〓CUI|Long〓ZHAI Shilong〓HUANG Jing〓WANG Aiqian〓XU Yonglong.DISCUSSIONS ON ACTIVITY OF FAULT F2 AT KIZIL RESERVOIR IN XINJIANG[J].chinese journal of theoretical and applied mechanics,2009,17(6):780-787.
Authors:LI Bin〓XIA Xinli〓CUI|Long〓ZHAI Shilong〓HUANG Jing〓WANG Aiqian〓XU Yonglong
Institution:](School of Geological Engineering and Geomatics, Chang’an University, Xian〓710054) (Management Bureau of Kizil Reservoir, Baicheng〓842300) (School of Water Conservancy and Civil Engineering, Xinjiang Agricultural University, Urumqi〓830052)
Abstract:The activity law of the active fault F2 nearby Kizil Reservoir area in Xinjiang has a major impact on the safety of Kizil Reservoir. The analysis of short leveling long observation sequence striding the active fault F2 shows that the lower wall of the fault F2 continuously performed a ground tilting movement from south to north in the past 40 years. The ground tilting movement not only affected the calculation result of short leveling elevation difference, but also affected the calculation result of two parameters including horizontal twisting amount and sliding angle of the dislocation model.  As a result,  the evaluation of the activity of the active fault F2 cannot be  objectively assessed.  In this paper, the year-variable-rate of the ground inclining at the point of 12 m along the measurement line direction on the footwall of the active fault F2 is obtained to be about 0.224 mm/a (from 1979 to 2006). The the year-variable-rate is obtained using the trend analysis of artificial short leveling foresight reading long sequence from the first deformation monitoring station (FDMS).  This rate of the ground inclining activity at the FDMS along the direction of measuring line between hanging wall and footwall is identified and verified  with the surface Subsidence Rate isoline map on both sides of the reservoir area nearby the active fault F2. I They are respectively 0.03 mm/a and 0.07 mm·a-1(from 1991 to 2002). The results of the calculation and analysis from the horizontal twist amount and the sliding angle indicate that although the activities of the active fault F2 over the past 10 years have some close relationships with the reservoir sluice, the reservoir water infiltration down along the active fault, the river path change and the crustal movement, we still cannot conclude that  the activities are being or have intensified.
Keywords:Active fault  Earthquake  Kizil reservoir  Short leveling elevation difference  Subsidence speed field  Ground inclining speed  Fault dislocation model  Fault activity
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