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December 27, 2023 Page 6-2 <br />Agapito Associates, Inc. <br />The results of the numerical modeling for the selected mining areas are summarized as follows: <br />Zone 1 (see Figure 6-1) <br />The last line of pillars is subjected to a maximum abutment load of between 2,000 and <br />3,600 psi. <br />The lack of any significant vertical stress imparted onto the life-of-mine roadways. <br />The SFs of the last line of pillars all exceed 4.5. <br />The SFs suggest the remnant pillars in the mains are not load bearing structures. <br />The SFs of the pillars next to the life-of-mine roadway exceed 1.5. <br />The SFs of the LW SS3 chute road pillars exceed 4.5. <br />Zone 2 (see Figure 6-2) <br />The last line of pillars is subjected to a maximum abutment load of between 2,000 and <br />4,000 psi. <br />The lack of any significant vertical stress imparted onto the life-of-mine roadways. <br />The SFs of the last line of pillars range between 3.5 and 4.0. <br />The SFs suggest the remnant pillars in the mains are not load bearing structures. <br />The SFs of the pillars next to the life-of-mine roadway exceed 2.5. <br />Zone 3 (see Figure 6-3) <br />The last line of pillars is subjected to a maximum abutment load of between 2,800 and <br />4,000 psi. <br />The lack of any significant vertical stress imparted onto the life-of-mine roadways. <br />The SFs of the last line of pillars range between 3.5 and 4.0. <br />The SFs suggest the remnant pillars in the mains are not load bearing structures. <br />The SFs of the pillars next to the life-of-mine roadway exceed 2.0. <br />The SFs of the LW SS2 Headgate pillars exceed 4.0. <br />Zone 4 (see Figure 6-4) <br />The last line of pillars is subjected to a maximum abutment load of between 2,400 and <br />4,000 psi. <br />The lack of any significant vertical stress imparted onto the life-of-mine roadways. <br />The SFs of the last line of pillars all exceed 4.5. <br />The SFs suggest the remnant pillars in the mains are not load bearing structures. <br />The SFs of the pillars next to the life-of-mine roadway exceed 2.0.