Análisis geológico geomecánico para la ampliación portuaria en la bahía de Islay

Abstract

The reason for this study is obtain the degree of Geologist Engineer from the National Univeristy of Engineering, within the college of Geological Mining and Matallurgical Engineering Geology. The focus of my study is found in the south of Peru in the district and province of Islay under the department of Arequipa. Geographically it is found on a coastal strip between the sea and the foot of the cliffs. Because of the growth and expansión of the Cerro Verde mine, Las Bambas as well as Xstrata have a great need to sell the minerals found therein, such as, copper and molybdenum. To be able to keep up with the growth of the minerals and the market the Port of Matarani is focusing on expanding warehouses and shipping areas are being improved. This not only helps the growth but it is now producing more job opportunity for the country. In order to carry out this task they contracted with another business called Zer Geosystem to help with the project. The zone of the geological study is found in the sector known as Cordillera de la Costa (or the coastal belt) which runs almost parallel to the coast. This sector is composed of metamorphic rocks called the basal complexo which corresponds to the Coast dating back to the age of Precambrian and the Paleozoica era. During the Project it is said that some rocks were found covered by soils of alluvial origin and this usually happens from being carried from the wind and deposited in the creveces of the rocks. The geological map was made to a scale of 1-1000, which identified them as lithological, morphological structural and external geodynamic units. Once geological mapping has been carried out with the aim of characterizing the rocky mass of the área of geomechanical studies in the Cantitravel zone where cuts have been made on both sides to créate a máximum height of up to 12 meters. For this purpose, a geological, geomechanical and slope stability analysis was performed to analyze the different types of breakage to see if these would fail. The RMR of Bieniawski (1989) was used to characterize the rock mass and determine its quality. To determine the slope stability analysis, the kinematic analysis was used and the stability of the faulty types with the Rocscience v.6.0 software. This was done by the limit equilibrium method and the safety factor was determined. With the studies that were carried out and the parameters obtained from the research and laborary tests, a correct study has been carried out assuring that the Works to be done Will not be affected.