地震研究

鲁甸M_S6.5地震造成大量房屋损毁及人员伤亡,其中龙头山镇房屋损毁最严重、人员伤亡最多。地震后,骡马口场地被选为恢复重建的主要场所。应用高密度电法分别对鲁甸震区龙头山场地、骡马口场地进行了勘探作业,初步认为勘探场区内地质构造复杂,断裂发育,构造展布以北东、北西向为主。龙头山场地地层较为破碎,场地内存在一洪积扇,是造成其上建筑物破坏严重的重要因素; 骡马口场地地形开阔、地势平坦,是地震恢复重建的有利场所,场地内存在断裂活动的迹象,建筑选址时应注意避让。同时,认为高密度电法具有高效快捷,资料分析处理相对简单,便于震后断裂构造快速判断和场地快速评估。

The Ludian M_S6.5 earthquake on Aug.3,2014 caused severe damages to a large number of houses and heavy casualties.Among the earthquake affected area,the most serious damage to houses and the most casualties was in Lontoushan Town.After the earthquake,the Luomakou site was chosen to the main place for restoration and reconstruction.We explored the Lontoushan and Luomakou sites in Ludian striken area by high density resistivity method respectively,and found that the geological structure is complex,the fault tectonic develops mainly in NE and NW direction in the exploration area.The stratum is broken,and there is a puluvial fan in Longtoushan site,which is an important factor in causing serious damage to buildings.The Luomakuo site with open and flat terrain is a favorable location for earthquake recovery and reconstruction.However,there exit the sign of fault activity in the site,so we should pay attention to avoid it when we select the construction site.Meanwhile,the high density resistivity method has the advantages of high efficiency and fast data analysis and processing,which is easy to handle,judge and evaluate the site rapidly.

引言
1 工区地质概况
2 常见岩土层电阻率
3 野外数据采集
4 资料解译与成果分析
5 结论与认识

图1 鲁甸县龙头山镇地质构造图(据1989年1:5万地质构造图G-48-27-D,龙头山幅修改)<br/>Fig.1 Geological structure map of the Longtoushan Town,Ludian County(modified from 1:50000 geological structure map in 1989,G-48-27-D,Longtoushan)

图1 鲁甸县龙头山镇地质构造图(据1989年1:5万地质构造图G-48-27-D,龙头山幅修改)
Fig.1 Geological structure map of the Longtoushan Town,Ludian County(modified from 1:50000 geological structure map in 1989,G-48-27-D,Longtoushan)

表1 常见岩石电阻率参数<br/>Tab.1 Resistivity parameters of common rocks

表1 常见岩石电阻率参数
Tab.1 Resistivity parameters of common rocks

图2 龙头山场地测线及钻孔位置示意图<br/>Fig.2 Sketch map of the distribution of measuring lines and the position of drill holes in Longtoushan site

图2 龙头山场地测线及钻孔位置示意图
Fig.2 Sketch map of the distribution of measuring lines and the position of drill holes in Longtoushan site

$图3 LTS-L1测线反演电阻率剖面及推测断层位置<br/>Fig.3 Section graph of inversion resistivity of line LTS-L1 and the location of the supposed fault fracture zone$

图3 LTS-L1测线反演电阻率剖面及推测断层位置
Fig.3 Section graph of inversion resistivity of line LTS-L1 and the location of the supposed fault fracture zone

图4 LTS-L2测线反演电阻率剖面及推测断层、钻孔位置图<br/>Fig.4 Section graph of inversion resistivity of line LTS-L2 and the location of the supposed fault and drill holes

图4 LTS-L2测线反演电阻率剖面及推测断层、钻孔位置图
Fig.4 Section graph of inversion resistivity of line LTS-L2 and the location of the supposed fault and drill holes

图5 LTS-L2测线两侧钻孔柱状图<br/>Fig.5 The drilling histogram on both sides of LTS-L2 line

图5 LTS-L2测线两侧钻孔柱状图
Fig.5 The drilling histogram on both sides of LTS-L2 line

图6 骡马口场地测线及钻孔位置示意图<br/>Fig.6 Sketch map of the distribution of measuring lines and the position of drill holes in Luomakou site

图6 骡马口场地测线及钻孔位置示意图
Fig.6 Sketch map of the distribution of measuring lines and the position of drill holes in Luomakou site

图7 LMK-L1测线反演电阻率剖面及推测断层位置<br/>Fig.7 Section graph of resistivity inversion of line LMK-L1 and the location of supposed fault

图7 LMK-L1测线反演电阻率剖面及推测断层位置
Fig.7 Section graph of resistivity inversion of line LMK-L1 and the location of supposed fault

图8 LMK-L2测线反演电阻率剖面推测断层位置<br/>Fig.8 Section graph of resistivity inversion of line LMK-L2 and the location of supposed fault

图8 LMK-L2测线反演电阻率剖面推测断层位置
Fig.8 Section graph of resistivity inversion of line LMK-L2 and the location of supposed fault

图9 LMK-L3测线反演电阻率剖面<br/>Fig.9 Section graph of resistivity inversion of line LMK-L3

图9 LMK-L3测线反演电阻率剖面
Fig.9 Section graph of resistivity inversion of line LMK-L3

图10 ZK6钻孔柱状图<br/>Fig.10 The drilling histogram of ZK6

图10 ZK6钻孔柱状图
Fig.10 The drilling histogram of ZK6

常祖峰,周荣军,安晓文等.2014.昭通—鲁甸断裂晚第四纪活动及其构造意义[J].地震地质,36(4):1260-1279.
陈军,杨川,陈泽元.2015.地下隐蔽水库的高密度电法探测研究[J].地球物理学进展,30(2):934-939.
崔建文,刘琼仙,段建新等.2014.2014年云南鲁甸6.5级地震强震动观测记录及初步分析[J].地震研究,37(4):542-548.
董浩斌,王传雷.2003.高密度电法的发展与应用[J].地学前缘,10(1):171-176.
杜良,葛宝,朱丽丽等.2012.综合物探技术在隐伏断层探测中的研究与应用[J].工程勘察,40(1):81-85.
李克昌,侯学英,赵维城等.1981.滇东北地区地震地质特征[J].地震研究,4(1):53-59.
李西,张建国,谢英情等.2014.鲁甸MS6.5地震地表破坏及其与构造的关系[J].地震地质,36(4):1280-1291.
祁民,张宝林,梁光河等.2006.高分辨率预测地下复杂采空区的空间分布特征——高密度电法在山西阳泉某复杂采空区中的初步应用研究[J].地球物理学进展,21(1):256-262.
王喜迁,孙明国,张皓等.2011.江玉乐高密度电法在岩溶探测中的应用[J].煤田地质与勘探,39(5):72-75.
王振兴,李向全,侯新伟等.2012.太行山前严重缺水地区地下水勘查实践:以灵寿县丘陵区为例[J].南水北调与水利科技,10(3):127-132.
闻学泽,杜方,易桂喜等.2013.川滇交界东段昭通、莲峰断裂带的地震危险背景[J].地球物理学报,56(10):3362-3373.
徐锡伟,闻学泽,郑荣章等.2003.川滇地区活动块体最新构造变动样式及其动力来源[J].中国科学:地球科学,33(增刊1):151-162.
徐锡伟,张培震,闻学泽等.2005.川西及其邻近地区活动构造基本特征与强震复发模型[J].地震地质,27(3):446-461.
杨海,葛良全,罗耀耀等.2014.高密度电法在茶园沟填埋场选址中的应用[J].地球物理学进展,29(1):447-451.
张光保.2012.褚家营巨型滑坡的高密度电法勘察及效果分析[J].地球物理学进展,27(6):2716-2712.

备注

引言

1 工区地质概况

2 常见岩土层电阻率

3 野外数据采集

4 资料解译与成果分析

5 结论与认识

期刊信息