Optimization of storage coal pit retaining wall
) A Bb (b + f)] a Q ≤ 03Aa ( to + c) a 3Bb (b + c) ~ (D + An + Bb) (a + b + c) a P ≤ 02 + D (ac) + (n + rb) a 1l blog. (Per + ) a 0.8Bh2 Chi 0 ( Lu +) ≥ 0 (D + An + B6) a 0.65ko (Bh2 a Adz1) ≥ 0 which , A = 1h1; B = r2h2; D = F + G; M2 = 1Ah1o (n1 +); M4 =- a 1Bh2k0 ( such as +); E = 6M2-1.2_, two (n + b + c); P = 6 (M2 an M4); Q: 1.2L (& ; + b ten c) + P. Design principles based economy , seeking (a + b) minimum (a + b) mino but because of (11) the complexity of the solution (n ten 6 ) difficult . Taking into account the actual needs of the precision engineering , specific problem, programming , numerical methods approach (a + b) n ~ nO2 examples of a reserve coal pit , retaining walls, soil and coal were severe r1 = 18kN/m3 , r2 = 14kN/m3, hl = 6.0m, h2 = 9.0m,
vibram five fingers outlet, c: 0.35m, d = 0.45m, G = 9 × 0.35 × 25 = 78.75kN/n1, take the wall at the end and soil friction coefficient = 0.4 , static earth pressure coefficient ko = 0.33,: 180kPa, corresponding to the above parameters into ( 11 ) . Programming , taking a value for n , (11 ) will correspond to the solution of nine , taking the largest solution to meet the stability requirements as the minimum value of b , thus determines a (a + b) 1 when a different value , there will be different (n + b) 2,
Beats By Dre Studio, (a ten 6), ..., (a + b) N Correspondingly , take (a + b) = min [(d + b) 1, (n +6), ...,
herve leger sale, (a +6)], then the a, b value is the best combination . Been shown in Figure 3 (a + b) n, with the curve , we can see when when a = 1.4m , b = 2.04m, to obtain (a + b) mm = 3.44nl. Figure 3 (n + b) 3 Conclusion casually curve analysis of the reservoir retaining wall in a coal pit soil and soil -free coal coal power in both cases by the state ,
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