Document Details

Document Type : Article In Conference 
Document Title :
Analysis and reinforcement of fissured large roof of a cavern in Mokattam hill at the suburb of Cairo
تحليل وتقوية مغارة ذو سقف متسع بجبل المقطم خارج حدود القاهرة
 
Subject : Mining Engineering 
Document Language : English 
Abstract : ABSTRACT: A natural cavern inside the Mokattam Hill at the outskirt of Cairo is currently being used by the Egyptian Radio as a broadcasting station. The cavern has a length of 120 m, a maximum width of 40m and a maximum height of 10 m. The maximum overburden thickness above the cavern is 90 m. In order to upgrade the broadcasting station, the Egyptian Radio and Television Cooperation requested the stability of the cavern to be ensured. For this purpose, Geotechnical and geophysical investigations on the side and fissured roof were undertaken. The cavern can be divided into three major sectors. The first part extends from the entrance to about 40 m and is characterized by an arched roof consisting of very weak limestone with very closed spaced two set of fissures. The second part extends from 40 m to 90 m and is characterized by an arched roof consisting of weak to medium limestone with fissures further spaced than in the first part of the cavern. The third part of the cavern extends from 90 m to its end. It is characterized by a flat roof of maximum 3 m height and consists of very weak marly limestone with very closely spaced fissures. Thirteen lateral sections were analyzed using the whole rock mass properties as well as some empirical formulas. Based on the results of the analysis, it has been recommended to strengthen the roof of the cavern in the following way: 1- For the first part of the cavern about 500 rock bolts spaced between 1 and 2 m apart. 2- For the second part about 450 rock bolts spaced between 2 and 3 m apart. 3- For the third part about 100 steel posts are needed. In addition to that, the whole side and roof surfaces of the cavern is needed to shotcrete processing. 
Conference Name : Proc. of ISRM Symposium Eurock 2001, Espoo, Finland: 401-408 
Publishing Year : 1422 AH
2001 AD 
Number Of Pages : 8 
Article Type : Article 
Conference Place : Espoo, Finland 
Organizing Body : International Society of Rock Mechanics 
Added Date : Sunday, April 3, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
محمود إبراهيم أبوشوكAboushook, Mahmoud IbrahimInvestigatorDoctorateprofdraboushook@gmail.com
عمرو جمال شريفSherif, Amr GamalResearcherDoctorateasherif@yahoo.com

Files

File NameTypeDescription
 29527.pdf pdfAnalysis and reinforcement of fissured large roof of a cavern in Mokattam hill at the suburb of Cairo

Back To Researches Page