CAJ | 학술논문

新疆克孜尔水库区内F_2活断层的活动规律对水库的安全性有重要影响,对F_2断层短水准长序列的观测分析表明:F_2断层下盘近40a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F_2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F_2活断层下盘测线方向上12m处地倾活动的年变速率(1979-2006)为0.224mm·a~(-1),根据库区F_2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~(-1)、0.07mm·a~(-1).对水平扭动量和滑动角的计算和分析表明:F_2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.
신강극자이수고구내F_2활단층적활동규률대수고적안전성유중요영향,대F_2단층단수준장서렬적관측분석표명:F_2단층하반근40a래지속발생착유남향북적지경운동.저기영향료단수준고차계산결과,야영향료위착모형수평뉴동량화활동각량개용우평개단층활동성적삼수적계산결과,종이사F_2단층활동성평개실거객관성.본문통과제1형변감측참인공단수준전척독수장서렬주세분석획득F_2활단층하반측선방향상12m처지경활동적년변속솔(1979-2006)위0.224mm·a~(-1),근거고구F_2활단층량측지표침강속솔등치선도학정、험증제1형변감측참상、하반측선방향상지경활동년변속솔(1991～2002)분별시0.03mm·a~(-1)、0.07mm·a~(-1).대수평뉴동량화활동각적계산화분석표명:F_2활단층근10여년래적활동수여수고축수、고수연활단층하삼、하류개도급지각운동관계밀절,단상무법인정기활동정재혹이경가극.
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.