Volume 1, Issue 3 (انگلیسی از صفحه 271 تا 280 2004)
2004, 1(3): 227-240 |
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The Charactristic Of Endokarst in The Bed Rock Of Hamedan' s Sinkholes Area. Journal of Engineering Geology 2004; 1 (3) :227-240
URL: http://jeg.khu.ac.ir/article-1-311-en.html
URL: http://jeg.khu.ac.ir/article-1-311-en.html
Abstract: (6669 Views)
(paper pages 227-240) The Famenin,Kaboudar-Ahang,Ghahavand plains are located in the north of Hamedan province.The sediment thickness of thier aquifers is about 70-100 meters .In recent years, some big and dangerous sinkholes have been developed in this area.By the result of excavations that done in these plains and investigation of the sourrounded outcropped area,it was found that the bed rock of this area has been made of Oligo-miocen limestones. According to the field observation,the measuring of joints and fractures systems, stud of thin sections, characteristics of excavations, yield of wells, the results obtained by chemical experiments of water and the estimation of parameters such as saturation and stability indexes,the amount of free carbon dioxide and the primary pressure of carbon dioxide gas,it was concluded that the Karstification phenomenon was happened in the bed rock and the Endokarst structures exist in it. Thus,The exist of Endokarst in bed rock cased to wells have been had high yield and Sinkhole were made in these area.In order to avoid or reducing the occurrence rate of Sinkholes in this area, we should avoid digging new wells in the bed rock and should stop the pumping of wells which have been drilled in the bed rock and have high yield.
Accepted: 2016/10/5 | Published: 2016/10/5
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