Roshdieh, A, Soo, FC, Zare Al Ahmadi, K, Ibnu Hamdani, A, Putra Ginting, A, Gonzales Valdestamon, R, Javadi Rudd, S & Sedeghipour, M 2024, 'Central thickened discharge scheme for Ma’aden’s Mansourah-Massarah Gold Project', in AB Fourie & D Reid (eds), Paste 2024: Proceedings of the 26th International Conference on Paste, Thickened and Filtered Tailings, Australian Centre for Geomechanics, Perth, pp. 221-234, https://doi.org/10.36487/ACG_repo/2455_18
(https://papers.acg.uwa.edu.au/p/2455_18_Roshdieh/)
Abstract: This paper provides a comprehensive case study detailing the inception, development, commissioning, and initial operations of a state-of-the-art tailings management facility in the Mansourah-Massarah Gold Project, situated within the arid terrain of the Kingdom of Saudi Arabia and operated by the Saudi Arabian mining company Ma’aden. With an annual average rainfall of a mere 80 mm and evaporation rates of 5,800 mm per annum, the mine relies on a water supply sourced from Taif town, a distance of 330 km. 
Commencing operations in 2022 and projecting a life span of 12 years, this operation is set to generate two types of tailings: oxide and sulphide (fresh) tailings, with a combined nominal production rate of approximately 4 million tonnes per annum. Given the arid setting and the substantial cost of water supply exceeding $4 per cubic metre, the rigorous management of water resources stands as a pivotal factor in tailings management selection. The primary objectives in tailings management for this project encompass the following key considerations:
The recommended strategy for this project involves the installation of a paste thickener in conjunction with central thickened discharge storage of the paste-thickened tailings. The tailings management approach for this project will be implemented in three progressive stages.
This paper explores the following facets of the project:
For this project, a 40 m-diameter paste thickener has been employed, targeting an underflow solid concentration of approximately 65% for fresh tailings and 57% for oxide tailings. Initially, it was estimated that the maximum beach slope would be 1.3% during the commissioning phase, gradually improving to 2.3%. As of the time of preparing this article, the first beach survey has been conducted, suggesting that the actual achieved beach slope is approximately 2.1%, surpassing initial expectations.

Keywords: tailings management, central thickened discharge, gold tailings