Jeoloji Münendisliği Dergisi

Monitoring of the Landslide Occurred in the Alipaşa Open-Pit Albite Mine by Using GPS and the Recognition of Causes of This Phenomenon

ABSTRACT: Landslide is the most common mass movement in open-pit mines. A serious slope-instability conditionis usually accompanied by gradual development of one or more tension cracks behind or near the crestof the slope, allowing for time-displacement monitoring. Surface-displacement movements employingGPS and other instruments with attendant prompt analysis of slope-movement velocities are usuallyadequate for predicting slope behavior. This study relates to investigate the causes of this phenomenaand monitoring of the slope movements in the landslide area in southeastern side of the Alipaşa openpit albite mine in Karpuzlu/Aydın. In this context, two relations were investigated in order to determineboth the mode of failure of mass movement and the recognition of landslide causes. The first one isbetween the trend and plunge of cumulative surface-displacement movement at each observation pointand dip angle-dip direction values of the foliation planes in gneiss unit. The second is, on the other hand,between the flowing directions of the stream beds in the former topography of the landslide area and dipdirections of the foliation planes located in and nearby of these beds. The affected area from the slide stillthreatens the mining operations. Absolute lateral and vertical movements within the sliding mass in thelandslide area were measured by using GPS. During the monitoring studies, rainfall amounts were alsomeasured and recorded. They have been evaluated in conjunction with the slope movement data. In orderto prevent and control the sliding-movement, the excavations were implemented in the landslide area withthe purpose of decreasing the slope height and the surface water was drained out of the landslide area.Thus, decelerating slope movements and the positive effects of the mitigation measures were attained andmonitored in this study.