SRK Consulting was commissioned by Koza Gold Operations Company to conduct a comprehensive dewatering and depressurization study for the Himmetdede Open Pit in Central Turkey. The project aimed to enhance the mine's operational efficiency and ensure the stability of the pit slopes. The Himmetdede Gold Mine, located in the Kocasinan District of the Kayseri Province, involves open pit excavation, a heap leach pad, a carbon absorption facility, and a waste rock dump.
The project setting is characterized by flat, vegetated agricultural land and experiences a continental style climate. The regional geology comprises Mesozoic metasedimentary rocks overlain by volcanic rocks and intruded by igneous plutons. The hydrological setting includes various water features such as dams, springs, and wells, with the main surface water course being the Kızılırmak River.
The study undertaken by SRK included an extensive analysis of the hydrogeological conditions around the pit. SRK's work involved collecting and analysing surface and groundwater data, using this information to develop suitable dewatering methods, and to design and budget for a dewatering operation that included in-pit sumps and wells. Additionally, SRK looked at options for discharging mine water back into the environment and estimated the associated costs.
SRK's study concluded that the proposed dewatering and depressurization methods would manage the mine's water inflows effectively and ensure the stability of the pit slopes. The successful outcomes of SRK’s work included the development of a detailed dewatering plan, the identification of suitable dewatering systems, and the establishment of a comprehensive monitoring program. These measures, once implemented, significantly enhanced the operational efficiency and safety of the Himmetdede Gold Mine.
