谁能帮我看看，这个怎么不能平衡？
我是初学者，最近老师让我们做一个简单模拟，但是我连初始平衡都做不出来？谁能帮我看看？new
gen zone brick size 30 44 3p0=(0,0,0) p1=(60,0,0)p2=(0,220,0) p3=(0,0,6)group meiceng
gen zone brick size 30 44 2p0=(0,0,6) p1=(60,0,6) p2=(0,220,6) p3=(0,0,9) group niyan
gen zone brick size 30 44 3p0=(0,0,9) p1=(60,0,9)p2=(0,220,9) p3=(0,0,15)group zhongxisha
gen zone brick size 30 44 3p0=(0,0,15) p1=(60,0,15)p2=(0,220,15) p3=(0,0,21) group niyan
gen zone brick size 30 44 5p0=(0,0,21) p1=(60,0,21)p2=(0,220,21) p3=(0,0,36)group shazhiniyan
gen zone brick size 30 44 10 p0=(0,0,36) p1=(60,0,36)p2=(0,220,36) p3=(0,0,66)group fenshayan
gen zone brick size 30 44 3p0=(0,0,-5) p1=(60,0,-5)p2=(0,220,-5) p3=(0,0,0)group xishayan
gen zone brick size 30 44 10p0=(0,0,-35) p1=(60,0,-35)p2=(0,220,-35) p3=(0,0,-5)group fenshayan
pl add surf yellow
pl show
model m
pro bulk 12.2e9 she 15.6e9 fric 34 coh 3.5e6 ten 4.41e6 range group fenshayan
ini density 2606 range group fenshayan
;粉砂岩
pro bulk 6e9 she 3.2e9 fric 23 coh 1.45e6 ten 1.2e6 range group shazhiniyan
ini density 2619 range group shazhiniyan
;砂质泥岩
prop bulk 5.3e9 shear 2.4e9 fric 25.4 coh 1.5e6 tens 1.13e6 range group niyan
ini dens 2600 range group niyan
;泥岩
prop bulk 16.2e9 shear 20.7e9 fric 33 coh 6.45e6 tens 5.6e6 range group zhongxisha
ini dens 2700 range group zhongxisha
;中细砂
prop bulk 5.3e9 shear 2.4e9 fric 25.4 coh 1.5e6 tens 1.13e6 range group niyan
ini dens 2600 range group niyan
;泥岩
pro bulk 1.35e9 she 0.85e9 fric 21.5 coh 0.8e6 ten 0.7e6 range group meiceng
ini density 1400 range group meiceng
;煤层
pro bulk 18.1e9 she 22.7e9 fric 35 coh 8.45e6 ten 6e6 range group xishayan
ini density 2700 range group xishayan
;细砂岩
pro bulk 12.2e9 she 15.6e9 fric 35 coh 3.5e6 ten 4.41e6 range group fenshayan
ini density 2606 range group fenshayan
;粉砂岩
fix z range z -35.1 -34.9
fix x range x -0.1 0.1
fix x range x 59.9 60.1
fix y range y -0.1 0.1
fix y range y 219.9 200.1
ini szz -6.75e6grad 0 0 2.5e4
ini sxx -2.02e6 grad 0,0,1.25e4
ini syy -2.02e6 grad 0,0,1.25e4
apply szz -6.75e6 range z 65.9 66.1
apply szz -9.15e6 range z -35.1 -34.9
apply sxx -2.02e6 grad 0 0 1.25e4 range x -0.1 0.1
apply sxx -2.02e6 grad 0 0 1.25e4 range x 59.9 60.1
apply syy -2.02e6 grad 0 0 1.25e4 range y -0.1 0.1
apply syy -2.02e6 grad 0 0 1.25e4 range y 219.9 220.1
set gravity 0 0 -10
set large
hist id=1 unbal
solve
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