Combined instability assessment and rockfall hazard in volcanic rocks (Kecioren, Ankara)

ULAMIŞ K., KILIÇ R.

ARABIAN JOURNAL OF GEOSCIENCES, cilt.13, sa.10, 2020 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 13 Sayı: 10
  • Basım Tarihi: 2020
  • Doi Numarası: 10.1007/s12517-020-05338-2
  • Dergi Adı: ARABIAN JOURNAL OF GEOSCIENCES
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Agricultural & Environmental Science Database, Aquatic Science & Fisheries Abstracts (ASFA), Geobase, INSPEC
  • Anahtar Kelimeler: SMR, ERHA, Instability, Rockfall, Hazard, Earth wall, Ankara, SLOPE, RESTITUTION, FALLS, RISK, MASS, COEFFICIENTS, AREA
  • Ankara Üniversitesi Adresli: Evet

Özet

Discontinuity bearing rock masses might be subjected to various mass movements due to the steep slopes, alteration, and manmade operational activities. Rockfall will take place in case several discontinuities form prismatic blocks. Special care must be taken in order to determine the rockfall potential and offer precautions. This study deals with the instabilities and rockfall hazard in an abandoned quarry, located in the residential area of Kecioren town, Ankara. This region has been declared as "Rockfall Hazardous," threatening nearby structures. Several rockfall events have been reported, and a huge wedge-shaped block has been released from the slope in the early 2000s. The whole slope has 660 m length and with an average height of 35 m. Eocene-aged dacite is the main rock unit. The whole slope was divided into sections, concerning slope instabilities and discontinuity characterization in order to delineate the Slope Mass Rating (SMR) classes. The rockfall hazard assessment along the slope was performed including the SMR classes, topography, and 2D rockfall analyses. Based on the evaluations, a combined mapping of the slope was conducted to offer mitigation methods. The methods included the removal of blocks from the slope face, covering the slope with anchored steel wire mesh and construction of an earth wall to prevent the possible rockfall damage to residents.