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ABSTRACT Purpose. The economic value of phosphate is reduced when randomly blending raw phosphate produced from different mines. Therefore, the blending process of different raw phosphate ores to produce economic percentage of P2O5 is essential to maximize the profit of a mine. Methods. This paper presents an application of Linear programming (LP) method to determine the optimum quantities of phosphate ore needed per each mine for blending process. Three phosphate operations, located in Aswan province south of Egypt, have been chosen for this study namely B1, B2 and C. Findings. The results of LP methods reveal that the phosphate ore of 24% of P2O5 will be produced by blending 16.8% of phosphate ore from operation B1, 9.42% of phosphate ore from operation B2 and 73.78% of phosphate ore from operation C. whilst the phosphate ore of 22% P2O5 will only be obtained by blending 66.43% of phosphate ore from operation B1 and 33.57% from mine B2. Originality. Using the linear programming by applying solver function in mine operations. Practical implications. Applied linear programming in mining as regard mining operations to obtain the optimum solution in mining sites.

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Abstract— Extreme weather events due to global warming become more frequent and intense in Egypt. Recently, some interior parts of Egypt saw torrential heavy rainfall and even snow for the first time in nearly half a century. Global warming consequences threaten Egypt's densely populated coastal strip and Nile Delta, and could have grave consequences for the country's economy, agriculture and industry. A rise of only 30cm to the sea level over the next 15 years would flood 200 square kilometers and displace 500,000 people, effectively ending 70,000 agricultural jobs. Planners and Decision makers are required to think about new scenarios and strategies which are raised as challenge in front of the recent climate changes in Egypt and related impacts. This paper describes recent climate changes impact in Egypt, its future impacts and tries to define defensive actions against the expected global warming crisis on Egypt.