Rock Slope stability of the Pilaspi Formation Rocks in the Bina Bawi Anticline at Darbandi Gomaspan / Erbil- Iraq

Ismail Hussain, Amera

	Rock Slope stability of the Pilaspi Formation Rocks in the Bina Bawi Anticline at Darbandi Gomaspan / Erbil- Iraq
Tikrit Journal of Pure Science
Article 1, Volume 19, Issue 5, 2014, Pages 87-97
Author
Amera Ismail Hussain
Abstract
Abstract This research included study of stability of rock slopes for Pilaspi formation in Bina bawi anticline at Darbandi Gomaspan area in Erbil, by selecting four stations on the outcrops of Pilaspi formation on the south western limb of the anticline. Detail surveying of rock slopes were carried out in each station with engineering describtion and classified according to (1) (2). The study revealed that the type of rock slopes were oblique lateral and parallel type according to the relationship of the strike of beds with the strike of the slopes, and concordant, right emergent according to (3) classification. The unconfined compressive strength values of the rocks calculated indirectly from point load test which ranged between (55.677-59.311)MPa for Limestone and (34.734)MPa for marly limestone. The type of the rocks were strong to moderately strong respectively according to (4). The average value of Tensile strength (σt) for limestone is 15.45 MPa/m2 and 7.12MPa/m2 for Marly Limestone. Also the fracture analysis was performed using stereographical projection. The types of failure in the study area were rock fall, toppling and rock rolling. The factors affecting the stability of the rock slopes were evaluated which included presence of discontinuities in the rock, over hanging slopes, differential weathering and cutting rocks for different purposes for example roads and road widen

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