A new mining method for reopening the opencast mine of Kef Essennoun

Purpose. To treat the stability problem of phosphate Kef Essennoun quarry in mining field Jebel Onk located Northeastern part Algeria. Methodology. achieve these objectives, we started by monitoring unstable area, using two systems: control stations and inclinometer. We then carried out a digital assessment Northwestern edge under current operating conditions exploitation. After that, proposed new plan for reopening depot required security conditions. At end, an stability, as work to reopen develop progressed. Findings. The results show exploitation, is (FS < 1). backfilling pilot pit mine, lead assurance mine walls increasing values safety factors with rate more than 30 %. Originality. resumption top-down exploitation will ensure during after mining. Practical value. study embankments bleachers, edges quarries facings slag heaps open useful ores deposits essential step that must be done gradually according development works guarantee personnel, materials, reserves environment.