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地震 ›› 2001, Vol. 21 ›› Issue (1): 39-46.

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新疆克孜尔水库地震危险性预测研究*

杨志荣1, 田兆光2, 安景生2, 张宏科2, 陶茂松2   

  1. 1.新疆维吾尔自治区地震局, 乌鲁木齐 830011;
    2.新疆维吾尔自治区水利厅克孜尔水库管理局,阿克苏 832313
  • 出版日期:2001-01-31 发布日期:2022-10-27
  • 作者简介:杨志荣(1940-),男,四川乐至人,高级工程师,主要从事地形变观测试验及地震预报研究。

Research on forecast of seismic risk for Xinjiang Kizil Reservoir

YANG Zhi-rong1, TIAN Zhao-guang2, AN Jing-sheng2, ZHANG Hong-ke2, TAO Mao-song2   

  1. 1. Seismological Bureau of Xin jiang Uygur Autonomous Region, Urumqi 830011, China;
    2. Manag ement Bureau of Kizil Reservoir, Water Conservancy Department of Xin jiang Uygur Autonomous Region, Akes u 8321313, China
  • Online:2001-01-31 Published:2022-10-27

摘要: 应用库区多项形变观测资料,对克孜尔水库蓄水后出现的形变异常及诱发水库地震的危险性进行了研究。结果认为: ①穿过水库大坝的F2活断层在蓄水后出现水平和垂直形变的特大异常变化主要是前期水库施工开挖土石方、填筑土石方及水库蓄水引起地面负荷变化的综合效应所致; ②克孜尔水库虽然存在诱发水库地震的潜在因素,但从库容、坝高、F2活断层产状、地质构造背景、水文地质条件、岩性以及世界各国发生水库诱发地震的成因、特点等多方面综合分析表明,克孜尔水库不具备发生水库诱发地震的充分条件;③由库区各项形变观测资料分析表明,库区地壳形变已由施工—蓄水初期时的反向异常变化恢复到了施工蓄水前的正常变化状态,各种受力因素经过调整达到了新的平衡,已进入相对稳定的继承性运动期,因此今后因蓄水诱发水库地震的可能性不大。

关键词: 蓄水后形变异常, 诱发水库地震预测, 新疆克孜尔水库

Abstract: Af ter the Kizil Reservoir in Xinjiang Region stored water, the hori zontal and vertical deforma tion appeared in the reservoi rarea. Acco rding to the references, the seismic risk induced by the reservoir was studied by using multi- item defo rmation data. The result shows: ① Active fault F2, crossing the reservoi rarea, defo rmed larg ely af ter the reservoir was stored water. It is thought that the changing of the load on the ground caused the deforma tion. ② Altho ugh there is po tential factor inducing ear thqua kes in the Ki zil reservoi rarea, the Precent condition of the reservoir water storage, dam height, fault F2 occurrence, geological tecto nic backgro und, hydrog eological condi tion, and the property of rocks could not induce areserv oi rear thquake. ③ Because the crustal deformation now ha s recov ered to no rmal sta te f rom the oppo site anomaly in the period of const ruction and ini tial water sto rage, and every kind of force-af fected facto rs hav e reacheda new bala nce, the pro babi lity to inducea reservoir earthquake is less in the future.

Key words: Deformation anomaly, seismic risk, Induced earthquake, Kizil reservoir

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