巷道开挖不支护条件下，顶板及两帮位移仅仅几厘米，怎.....

chengshaobei

n
;==============================N3702运输巷建模==========================================
plot block group
gen zone radtunnel  p0 0 0 0 p1 5 0 0 p2 0 30 0 p3 0 0 5 size 5 30 5 5 ratio 1 1 1 1.1 dim 2.2 1.7 2.2 1.7 group weiyan1 fill group N3702运输巷
gen zone brick p0 5 0 0 p1 20 0 0 p2 5 30 0 p3 5 0 5 size 10 30 5 ratio 1.1 1 1 group weiyan2
gen zone brick p0 0 0 5 p1 5 0 5 p2 0 30 5 p3 0 0 20 size 5 30 10 ratio 1 1 1.1  group weiyan3
gen zone brick p0 5 0 5 p1 20 0 5 p2 5 30 5 p3 5 0 20 size 10 30 10 ratio 1.1 1 1.1  group weiyan4
gen zone reflect ori 0 0 0 norm -1 0 0
gen zone reflect ori 0 0 0 norm 0 0 -1

;=================================摩尔库伦模型=======================================
;
mo mo
;
prop bu 9.7222e9 sh 3.977e9 c 8e6 f 41 ran z -20 -15 ;粉砂质泥岩
prop bu 1.9933e9 sh 1.196e9 c 1.8e6 f 28  ran z -15 -9 ;碳质泥岩
prop bu 2.8e9 sh 1.4e9 c 3.7e6 f 33  ran z -9 3 ;7#煤
prop bu 2.2e9 sh 1.7e9 c 4.2e6 f 35 ran z 3 10 ;泥岩
prop bu 3.3ee sh 1.6e9 c 1.7e6 f 28 ran z 10 20 ;砂质泥岩
;
ini density 2500
set grav 0 0 -10

;==================================定义边界条件===============================================
;
ini sxx -36.2e6 grad 0 0 25e3 ran z -20 20
ini syy -14.6e6 grad 0 0 25e3 ran z -20 20
ini szz -11.7e6 grad 0 0 25e3 ran z -20 20
apply szz -17.5e6 ran z 19.9 20.1
apply sxx -36.2e6 grad 0 0 25e3 ran z -20 20
apply syy -14.6e6 grad 0 0 25e3 ran z -20 20
fix x ran x -20.1 -19.9
fix x ran x 19.9 20.1
fix y ran y -0.1 0.1
fix y ran y 29.9 30.1
fix z ran z -20.1 -19.9
plot con szz shade on
plot set rot 20 0 30
solve
save 初始地应力场90°.sav
ini xdisp 0 ydisp 0 zdisp 0
ini xvel 0 yvel 0 zvel 0
ini state 0
plot con szz shade on

;===================================开挖不支护=============================================
;
mo nu ran group N3702运输巷
plot block state
solve
save 开挖不支护90°.sav

chengshaobei

最近一直遇到这个问题，望大家指点迷津！

煤炭少帮主

我的变形也是太少，只有40~50mm，感觉太少了，都不用支护了~

trackbed

what kind of soil is this? Cohesion is 4e6? what is the unit, pascal?

daafccbafc

fix 和 apply能一起用吗

侯健

对围岩的参数进行调整，尤其是E和V

憧憬现实

楼主做过上山巷道的支护模拟没有？

憧憬现实

楼主，锚注的支护做过没有？

laiyonghui

我也出现了这种问题，同求解

li凌霄

调整围岩参数，泥岩的C调小

herculis

这个本构参数是不是有问题啊？