تحلیل فضایی مخاطرات محیطی

تحلیل فضایی مخاطرات محیطی

پایش و تحلیل فضایی پایداری شیب با استفاده از تکنیک پراکنش‌کننده‌های دائمی تصاویر راداری سنتینل 1، مطالعه موردی: معدن مس سرچشمه

نویسنده
علی مهرابی
دانشگاه شهید باهنر کرمان
10.29252/jsaeh.7.3.17
چکیده
معدن مس سرچشمه یکی از بزرگترین معادن مس پورفیری جهان محسوب می­شود. پایش و تحلیل حرکات رخ­داده در محدوده معدن می­تواند به تحلیل و بررسی پایداری دیواره آن کمک شایانی بنماید. در این تحقیق سعی شده است تا با استفاده از تصاویر سنتینل 1 و اعمال روش تداخل­سنجی پراکنش­کننده­های دائمی، پایداری شیب دیواره­ این معدن مورد پایش قرار گرفته و محدوده­های ناپایدار احتمالی مشخص شود. در این راستا از 10 فریم تصویر سنتینل1 که طی یک سال اخیر تصویربرداری شده است استفاده شد. به منظور شناسایی نقاط پراکنش ­کننده دائمی از روش StaMPS استفاده شد، به طوری که با تهیه 9 تداخل­نگاشت و ورود آنها به آنالیز سری زمانی، تعداد 650 نقطه که ویژگیهای پراکنشی آنها در طول زمان ثابت است و دچار عدم همبستگی زمانی نیستند، مورد شناسایی قرار گرفت. با اندازه­گیری میزان جابجایی نقاط پراکنش­کننده دائمی، تغییرات ارتفاعی رخداده در محدوده معدن مشخص شد. بر اساس نتایج به دست آمده تغییرات ارتفاعی رخداده در محدوده معدن بین 45 میلیمتر تا 45- میلیمتر در سال متغیر است. بر این اساس 3 محدوده فرونشستی به ترتیب در بخش­های غربی، شرقی و شمال غربی دیواره معدن با مساحت 100 هزار، 68 هزار و 17 هزار متر مربع شناسایی شد. مطالعات میدانی انجام گرفته صحت نتایج را تایید می­کند. با توجه به اهمیت موضوع و به منظور جلوگیری از تخریب و ریزش دیواره این معدن مطالعات ژئوتکنیکی دقیقتری در این محدوده­های تعیین شده لازم به نظر می رسد.
کلیدواژه‌ها
تداخل‌سنجی راداری
سری زمانی
تحلیل پایداری
نرخ جابجایی
معدن مس سرچشمه

عنوان مقاله English

Spatial Analysis and Monitoring of Slope Stability using Persistent Scatterer Tecnique of Sentinel 1 Radar Images, Case Study: Sarcheshmeh Copper Mine

نویسنده English

ali mehrabi
Assistant Professor, Department of Geography and Urban Planning, Shahid Bahonerkerman University, Kerman, Iran.
چکیده English

Based on the correlation diagram between the master and slave images (Fig. 5), the pair of appropriate images in terms of the shortest spatial and temporal lines is identified to produce the interferogram. As shown in Fig. 5, the maximum vertical baseline is obtained between -400 and -400. The obtained interferograms indicate the cumulative phase of the study area, which fluctuates between zero and 2ᴫ. Using StaMPS method on interferograms, 650 points were identified and selected as permanent scatter points in the study area. As can be seen in Figure 7, the cumulative displacement of the permanent dispersant points varies from + 45 mm to -45 mm. The displacements occur in the direction of the satellitechr('39')s view so that the positive numbers Indicates surface approach to satellite and the uplift and the negative numbers indicate the surfacechr('39')s distance from the satellite and the subsidence. As shown in the figure, in the western part of the mine wall, areas of 100,000 square meters have been heavily subsided. The next area, which has high subsidence points, is in the eastern part of the mine wall with an area of 68,000 square meters. The third area is located in the northwestern part of the mine with an area of 17,000 square meters.

By measuring the amount of displacement of Persist Scatters points, the altitude changes occurred in the mining area. Based on the results, the altitude variation changes in the range of 45 mm to -45 mm per year. Accordingly, 3 subsidence area were identified in western, eastern and northwestern parts of the mine wall with an area of 100, 68, and 17 thousand square meters. Considering the importance of the subject and in order to prevent the destruction of the mine wall, more precise geotechnical studies are needed in these specified areas.

کلیدواژه‌ها English

Radar Interferometery
Times Series
Stability analysis
Displacement Rate
Sarcheshme Copper Mine
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