r r
Hpi nghi khoa hoc kT thuat mo quoc te - 2010 Cong nghiep mo tien tien vi su phdt trien ben vung
N G H I E N C U t J H E T H O N G C H O N G L O T A I M O T H A N D O N G H U A T U O ThS. Li Qin
T r u a n g D a i hoc C o n g nghe L i a o n i n g , F u x i n , T r u n g Qudc Tom tat: Phay F2 la mot tap hop phay tqi mo than Donhuantuo (Kailuan). Chieu day ciia
phay dao dpng trong khoang 0 - 26m, ddi 690m. Thanh phdn chinh ciia phay Id dam ket mdu xam, set mach vd dd voi. Trqng thai ban ddu tuong ddi kho rao vd dn dinh. Dudi ung suat phuc tap ciia dudng Id cd ca'u tqo ddt dd mem yeu, cdc tdc gid de xudt mot gidi phap ky thudt trong chdng giu dudng Id thdng qua viec su dung md hinh FLAC3D de tit dd thiet ke chi tiet so do chdng Id bang neo ket hop be tdng phun.
1. Gioi thieu chung
1.1 Khdi niem ve thiet ke
(1) Bao g o m cot chong chinh, cot chong phu.
(2) Thay cho cot chdng diing m o t ldn, chung t d i da t h i l t k l he thdng cdt chdng n h i l u muc va gia cudng dat da x u n g quanh.
(3) Tang c u d n g cac chi sd do ben ddt da tai cac v i m g phay pha, ddt gay thdng qua viec sir dung neo be tdng.
(4) Tang c u d n g kha nang phong ngira va k i e m soat phay chua nude.
(5) G i a m su thoai hda ciia dat da m e m tai phay.
t f r w 1.2. Thiet ke he thdng chdng gid
1.2.1 Thiet ke so bd (1) Thiet ke cac bd phan
D u d n g l d doc v i a cd tiet dien 4 8 0 0 m m x 3 4 0 0 m m , p h u hop v d i nguyen ly khong gian trudc. Qua k h u virc phay cd t i l t dien 5 4 0 0 m m x 4 0 0 0 m m , t i l t dien dao: c h i l u rong thuc x chieu cao thuc bdng 5 9 0 0 m m x 4 5 0 0 m m .
(2) Thiet ke chdng g i u d u d n g ld cai chinh
- Ndc va hdng l d : G d m b d n ldp be tdng phun v d i tdng c h i l u day la 2 5 0 m m . L d p thir nhat la ldp be tdng phun de chdng do, do day 8 0 m m ; l d p t h u hai va t h u ba k i t hop c h l n g giir bang be tdng phun va cap soi thep, neo, cd c u d n g do bdng nhau - M 2 4 L 2 4 0 0 m m , khoang each giua cac neo la 7 0 0 m m x 7 0 0 m m , neo lap so le nhau. K h o a n g each giua cac hang la 3 5 0 m m x 3 5 0 m m . Cap soi thep dugc dat so le. V i e c bd t r i neo cung t u o n g t u . D o day ciia hai ldp nay bang nhau va bdng 6 0 m m . L d p t h u t u k i t hgp chdng g i u bang neo be tong va trai l u d i thep, neo cap dugc gia cudng bang vira be tdng (p 25 L 2600 (2800) m m . L u d i thep g d m cac soi cd d u d n g k i n h 6 m m . C o 6 l u d i la 1 0 0 m m x 1 0 0 m m . D o day l d p be tong phun 5 0 m m . D o b i n be tdng la C15.
- N e n l d : G d m ba l d p v d i tdng c h i l u day 2 5 0 m m . L d p thir nhdt la l d p be tdng phun de chong d o cd chieu day 150mm, ldp thir hai sir dung neo va be tdng p h u n v d i c h i l u day 50mm, ldp thir ba k i t hgp neo be tdng va trai l u d i thep, neo duoc gia c u d n g bang vua be tong (p 2 5 L 2 2 0 0 m m , l u d i thep 5 0 m m , ldp be tong phun day 5 0 m m .
Hoi nghi khoa hoc ki thudt mo qudc ti - 2010 Cong nghiep mo tien tien vi su phdt trien bin vung
Hinh 1. So do lap neo - Sa dd lap neo ( H i n h 1)
2. M o p h o n g so hoa cac c h i r o n g t r i n h c h o n g g i i r
2.1. Phdn mem md phong so hda Be mo phong sd hda dia k y thuat cd the lua chon nhung phan m e m khac nhau. M d phong sd hda dugc trien khai bang phan m e m I T A S C A dugc ggi la F L A C 3 D .
Be danh gia cac dieu kien dac biet ciia k h u vuc dia chat, viec xay dung len cac m o h i n h thuc la dieu kho khan, V i vay, c h u o n g t r i n h phan t i c h cac phan tir h u u han k h o n g the t i n h toan va cho ra cac ket qua c h i n h xac hon, chi la cac phan t i c h dinh tinh.
2.2. Md hinh
(1) H i n h hgc m d h i n h
Lay d i e m giua mat cat nira h i n h tron lam gdc, true thdng d u n g ben phai la dudng .16 true x, mat phang dgc theo true d u d n g l d , true y, v u o n g goc v d i true z. T i n h tren mat phang v d i k i c h thudc 3 0 m x 15,5m, true z lay trong khoang 11m -^T5m. T r o n g pham v i l u d i tga do sai phan hiru han ba chieu, co tong cong 92169 nut dugc chia nho,
89280 d o n v i . M a n g t i n h toan dugc g i d i thieu tren h i n h 2.
(2) Cac dac t i n h vat lieu the hien tren bang 1.
(3) U n g suat dat da ban dau.
Chung ta l u u y den trgng lugng khoi trong i m g suat dat da ban dau theo hudng thang dung, muc do i m g suat cho biet cac thong t i n ve dieu kien dia chat mo Bonghuantuo, hudng x
Bang 1. Thdng so vat ly
Hinh 2. So do d mang ba chieu.
T f
Ti'nh chat dat M o dun M o dun M o dun Goc Luc dinh Do ben >—1 He so
da dan hoi bien dang cat/G/GPa ma sat ket keo Poisso
/E/GPa /K/GPa /f/° /C/MPa /T/MP
a
n
Phav lien ket 1.44 0,8 0,6 30 1.8 1,8 0,2
Ddi bi pha huy 0,225 0,1 0,1 18 0 0 0.13
Gia cuong vua 1,19 0,65 0,5 35 2,0 2,0 0,19
be tons
Tru bao ve 1.90 0,90 0,83 35 3,0 3,0 0,15
Hpi nghi khoa hoc kT thudt mo quoc te - 2010 Cong nghiep md tien tien vi su phdt trien ben vung
dugc lay theo gia tri 11,4 MPa, huong y dugc lay theo gia tri 18,8 MPa, huong ung suat chinh t6i da gan v a i true duong 16. N o co l g i cho do on dinh trong khai dao duong 16.
2.3. Mo phong dao dudng lb qua phay
M o phong d a i b i pha h u y nham muc tieu dat dugc cac gia t r i the hien n h u n g anh h u o n g , su dich chuyen va u n g suat nen cua d u o n g 16 se dugc dao.
T r o n g qua t r i n h dao d u o n g 16 qua phay can tranh n6 m i n .
Hinh 3. Dich chuyen thang dung bi che phu
Hinh 4. Ban do dudng muc
Hinh 6. Dudng ddng tri dich chuyen
Hmh 7. Tiet dien X tien tdi dich chuyen
(l)Phan tich dich chuyen
Sau k h i p h u n v u a be tong, do cung v u n g cua Hinh 5. Dich chuyen thdng dirng dat da tang len, 0,7m tai m o i d u o n g 16 dgc v i a theo
cac nguyen l y chong g i u cac d u o n g 16. T u cac ket qua co the thay, su d i c h chuyen cua d u o n g 16 cai c h i n h da duoc k i l m soat m o t each hieu qua, bien dang t o i da tai hai ben hong 16 theo mat p h i n g ngang v u o n g goc v a i true ducmg 16 (huang x ) , tap trung tai k h u vuc d o i b i pha huy. K h i khoang each giua cac t r u ddt da bao
Hoi nghi khoa hoc kT thudt mo qudc te - 2010 Cong nghiep mo tien tien vi sir phdt triin bin vung
ve giam, sir dich chuyen cung g i a m theo. Su dich chuyen tai n l n 16 tucrng d o i I o n ( x e m cac hinh 3 - 8).
Hinh 8. Tiet dien X tiep can dudng ddng tri
Hinh 10. ifng suat thdng dung cua ddt dd bao quanh
dudng lo Hinh 9. Phdn bo ung suat
chinh ban ddu xung quanh dudng lb
(2) Phan t i c h u n g suat: K h i tiet dien x tien t a i k h u virc dat da dich chuyen, u n g suat chinh ban dau tang dan.
O khoang each 2 m t i n h tir be mat d u o n g 16 cai chinh, u n g suat ban dau nay gan v o i u n g suat dat da nguyen thuy.
U n g suat thang d u n g quanh d u o n g 16 cai chinh phia tren va phia d u o i bang k h o n g (0). T a i k h u vuc each d u o n g 16 4 m , xuat hien tap trung u n g suat cue bo. Cung xuat hien ung suat thang d u n g co gia t r i I o n h o n tai nen duong 16 cai chinh (hinh 9 va 10).
(3) V u n g deo
Tir cac ket qua m o phong ( h i n h 11), da xuat hien vung deo ciia d u o n g 16 cai c h i n h truoc k h i phay 16 ra, nhung chieu day cua no nho. D u o n g 16 cai chinh on dinh.
Trong qua t r i n h dao, v i i n g deo tang dang ke trong k h u vuc dut gay va tiep tuc phat trien trong dat da vay quanh.
T i n h deo trong noc 16 t u o n g d o i thap, trong k h i do v i i n g deo tai nen lai t u o n g doi Ion. Khi dao k h u vuc co phay, v i i n g deo tai nen tang dot ngot k h i e n cho d i c h chuyen nen tang. V i vay, dau tien can tien hanh xay dung gan nen 16 tai k h u virc co phay.
2.4. Ket luan
(1) Sau k h i dp dung p h u o n g phap chong g i u nay noc va hai ben hong d u o n g 16 dam bao on dinh;
(2) U n g suat thang d u n g I o n nhat tap trung tai hai ben chan 16;
(3) B i e n dang v i m g deo chii yeu tap t r u n g tai k h u virc co phay.
Theo cac k i t qua m o phong, ban t h i l t k l so bo da duoc c h i n h sira theo ke hoach chong g i u m o i .
3. T h a y d o i t h i e t ke
Theo cac k i t qua m o phong, nham tang c u o n g kha nang chong giir noc va hong 16, ban thiet ke so bo da duoc c h i n h sira d l tang cuong v o m chong noc.
Hinh 11. Phdn biet vung deo tren tiet dien dudng Id
Hpi nghi khoa hoc kT thudt md qudc te - 2010 Cdng nghiep md tien tien vi su phdt trien ben vung
3.1. Thiet ke khu vuc
Tiet dien k h u v y c d u o n g 16 doc v i a thuang la 4 8 0 0 m m x 3 4 0 0 m m , theo cac nguyen ly khoang k h o n g phia truac, trong k h i chong giir nen va hai ben hong d u o n g 16, chung ta da dong t h a i tang c u o n g kha nang v u n g chac cua v o m noc. T a i k h u v u c co phay, da sir dung mat cat co dang h i n h c h u U v o i k i c h thuac 5 4 0 0 m m x 4 4 6 5 m m ; tiet dien dao la 5900mm x 5 0 1 5 m m (tiet dien dao thuc te co the lay theo: chieu r o n g thyc x chieu cao thuc
= 6000mm x 5 1 0 0 m m ) . 3.2. Set dd chdng giir (1) So do lap neo
(2) Cac d i e m do chong sup do, chong bung nen
* Phun vira truoc hai goc chan duong 16, gia c u o n g dat da, noc va nen duoc bao ve;
* T i e n hanh con tac dao bang phuang phap kho, dam bao qua trinh thuy hoa k h o n g xuat hien tai day;
* Sir dung khoan k h i nen de dao 16, tranh gay chan dong v u n g dat da xung quanh;
* Dao 16 theo tirng doan ngan, chu k y k i e m soat 7 0 m m ;
* K i e m soat nghiem ngat doan duong 16 dao qua phay, chi
tiet tirng cong doan trong dong neo, phun vira, p h u n be tong . . . de dam bao on d i n h noc va nen 16.
* Toan bo k h u v y c duoc chia thanh hai giai doan dao, dam bao phia tren guong 16 doc khong bi bong l o p , theo dieu k i e n thuc te khai t r u a n g , viec dao d u o n g 16 co the chia lam ba buoc dam bao an toan cho noc 16;
* Sir dung khoan k h i nen tai k h u vuc dac biet;
* Sir dung x i mang co c u o n g do dong ket manh de san xuat be tong phun;
* Hai ben hong 16 duoc chong giir bang be tong phun va neo hoac mang neo;
* K h o n g che bung nen bang be tong p h u n va neo.
4. P h u n v i r a
Qua viec sir dung neo dai va vua be tong 6 cac mire do khac nhau, do cung v u n g cua dat da tang len, do on d i n h va kha nang mang tai cua dat da tang.
4.1. Lira chon neo vira be tdng
Neo vua be tong g o m t u i neo va can thanh neo. Goc cua v o m va ben trong p h u a n g phap phun tien t i l n nay lan l u o t la 4 5 ° va 15°, c h i l u dai 2 6 0 0 m ~ 2 8 0 0 m m . K h o a n g each giua v o m x i mang va neo noc I o n h o n chieu dai be tong p h u n c u o n g do cao, dam bao cac diem dong neo dat do cirng v u n g cao. Quan trong h o n , bang p h u a n g phap tang c u o n g do
l-NeoM24L2400; 2- Neo M24L2400;
3- (p25 (32 ) Neo vira be tong L2600 (15°) ; 4-(p25 (32) Neo vua be tong L2800 (45°) ; 5-ip25 (32) Neo vira be tong L2200 (25°) ;
6-cp25 (32 ) Neo vua be tong L2200 (15°)
Hpi nghi khoa hoc kT thudt mo qudc ti Cong nghiep mo tien tien vi sir phdt triin
- 2010 ben virng
cung v u n g cho dat da, da tap trung tich hop va huy dong phdn ddt da p h u tham gia vao he thong chong g i u ket hop, dam bao do on d i n h cua su chong giir d u o n g 16.
Cac goc cam neo be tong phun la 2 5 ° va 15°, c h i l u dai la 2 2 0 0 m m , dam bao bit k i n phay chua nuoc.
Cuoi neo co dang bao chat deo, dang n e m ngira, dang ong co ranh . . . . Neo phii hop la loai neo co dau ket cau co hoc, than ong neo xe ranh hoac loai neo da chuc nang ung suat truoc.
4.2. Lira chon cdc thdng so be tdng phun
Trong qua t r i n h sir dung vira x i mang can chu y den thanh phan vua, v o i x i mang mac P.042.5R t h i t y len n u o c / x i mang W / C = 0,6 ~ 0,8; de tang c u o n g kha nang dong ket som va t i n h l u u dong cua chat long, can them p h u gia sieu deo U N F - 4 , chiem trong luong 1,5 ~ 2,5%, ket hop v o i nuoc l a m tang do cung v u n g va do ben lien ket, tron them 10%
trong l u o n g p h u gia x i mang n o hoac be tong n o . Co the sir dung them v u a hoa chat.
(1) A p luc b o m
T u y theo cac dirt gay dat da va do cung virng cua cau true b i t k i n , thong thuong ap luc b o m phut vira la 1,5 ~ 2 M P a . A p luc b o m tuc t h o i co the cao h o n ap lire b o m lap dat.
(2) L u o n g vira va dieu c h i n h ap luc phun be tong
K h i ap lire p h u n be tong cuoi cung dat duoc ap luc theo thiet ke, dirng phun vua sau 1 0 - 1 5 phut. K h i ap luc p h u n be tong cuoi cung thap h o n ap luc theo thiet ke, tiep tuc b o m vua. T h o n g t h u o n g sau k h i b o m 8 den 10 t u i , dirng b o m vua. Sau hai g i o , l a m sach va tien hanh b o m v u a dot hai (5 den 10 t u i ) . De dam bao k i c h thuoc ban k i n h khuech tan, nen sir dung loai v u a b o m d o n . N e u co m o t l u o n g I o n can t r o n g b o m be tong va dung dich khoan t h i can phai dieu c h i n h lai do nhot cua vua.
(3) Phuong phap p h u n v u a be tong
Neo be tong dong v a i tro chinh trong cac p h u o n g phap xay d u n g , trong qua trinh phun vua can chu y den goc chan d u o n g 16.
5. C h o n g giir t h i r cap
(1) De chong g i u t h u cap, co the sir dung cac k h u n g thep ket hop v o i be tong phun tao thanh dang v i chong k i e u v o m .
(2)Neu trong k h u v y c phay co nhieu nuoc co the sir dung cac k h o i be tong cot thep cuong do I o n de chong t h u cap.
6. C h o n g giiir b o s u n g
D y a tren y t u o n g " T h i e t ke t o i u u , chong g i u nang dong, quan l y nang d o n g " co the chong g i u bo sung d u o n g 16 cai chinh. T r o n g qua t r i n h t h i cong chong g i u va gia cuong, sir dung b o m phun phuc h o p , nham k i e m soat su bien dang dat da x u n g quanh.
Chung t o i da str dung phan m l m F L A C de xay d u n g m o h i n h m o phong so hoa va phan tich so do c h l n g g i u so bo. Sau k h i nhan duoc cac ket qua cua m o h i n h mo phong chung t o i da xay d u n g len m o t so do chong g i u m o i . C h u o n g t r i n h chong g i u m o i nay da duoc thuc hien thanh cong va da giai quyet duoc cac van de dao va chong 16 tai duong 16 N o r t h 2, k h u v y qua phay F2, n o i ddt da m l m y l u va u n g suat phiic tap./.
