C o n g t y T]\HH MTV t h a n Q u a n g H a n h
For increasing the coal productivity and transportation capacity, and environment improvement, recently, under the coordination between Quang Hanh Coal Company and VIMS AT, the installation of the conveyor system for coal transportation from the ground of +20 level to the Central coal separation area has been carried out replacing the transport form of using trucks with low capacity and high operational and maintenance cost.
The paper also introduces the main technical features of the conveyor system.
ThS. DOAN NGOC C A N H KS. vu HU'U HOANG Vien Khoa hgc Cdng ngh^ Md •
Vinacomin
Thyc hipn chu truang eua Tap dodn Cdng nghiep Than - Khodng san Viet Nam ve viec bdng tai hda trong san xuat nham ndng eao nang s u i t , san lugng khai thac vd quan trpng han Id cai thipn mdi trudng tgi viing md, Vipn Khoa hpc Cdng nghp Md phdi hgp cung cdng ty TNHH MTV than Quang Hanh t i i n hdnh khao sat, thiit ke xdy dyng hp thdng bang tai, van tai than tir mat bang +20 ve khu sdng tuyln Trung tdm d l thay t h i cho hinh thure van tai dtd vdi ndng s u i t thap, chi phi van hdnh bao dudng tdn kem vd gay anh hudng nhieu tdi mdi trudng.
Theo yeu d u cdng nghp, tuyln bang nhgn tai tir diem rdt cua bang tai g i i n g mat bang +20. d i l m d d tai tgi xudng sang Trung tdm mat bang +21, vdi ndng s u i t vgn chuyen ban dau Id 600.000 tan/ndm.
Tren ca s d d i l u kipn dja hinh thyc t l cd 1 sd hudng t u y l n cd t h i xac Igp cho tuyen bang:
- Hudng t u y l n thir nhit:
Tir d i l m nhdn tai t u y l n bdng vugt qua sudi, ehgy men theo khu ddi phia sau khu nha lam viec cua edng ty than Quang
Hanh rdi dd vdo Xudng sdng.
- Hudng t u y l n thir hai: Tir d i l m nhdn tai men theo khu ddi phia sau nhd d i l u hdnh mat bdng +20 vd men theo dudng bp rdi do vdo Xudng sdng.
Qua phdn tich ddnh gid, ca hai hudng t u y l n tren deu cd nhO'ng nhuge d i l m , cy t h i Id:
+ T u y l n di vdng, phai chuyin hudng do dd sir dyng nhiiu bang ndi t i i p nhau.
+ Cd nhieu giao cat vdi dudng giao thdng, anh hudng den k i t d u lap dung.
+ Giao d t vdi nhiiu cdng trinh xdy dyng, khu dan c u hipn cd gdy khd khdn va mat nhiiu chi phi cho giai phdng mgt bang.
+ T u y l n bdng phai leo ddc cao d i n d i n chi phi d i u t u Idn vd chi phf vgn hdnh bao dudng sau ndy se tdng cao.
+ Phai sir dung nhieu trgm dan ddng trung gian, khd khdn trong viec eung d p ngudn dipn dpng lu-w eho tuyln bdng.
- Qua khao sdt ky d i l u kipn dja hinh, trao ddi vd thao lugn vdi chu dau t u - Cdng ty than Quang Hanh da thdng nhit lua chpn hudng tuyln thir 3:
Tir d i l m nhdn tai mgt bing +20 khu Nam, tuyln bang vugt qua dudng d td re vao mat bang khu Nam vd tuyln dudng d td di qudc Id 18 sau dd di men theo bd sudi phia ben trdi (theo ehilu ddng chay) rdi vugt qua d u Bpnh vipn, di t i i p men theo bd sudi khoang 30m vugt qua sudi sang phia bd ke mat bang khu Nhd d i l u hdnh Cdng ty than Quang Hanh. Tgi ddy tuyln bdng di tren ego vugt qua khu nhd xudng cua Cdng ty, vugt qua d u Lep My, t i i p tyc di men dgc theo bd sudi rdi vugt len khu ddi d i t do Cdng ty than Quang Hanh quan ly, dogn ndy t u y l n bdng iDdm udn theo mat bang khu vye vd t i i p tyc vugt sudi sau dd do v l Xudng sang Trung tdm mgt bang +21.
KHCNM S 6 8/2011* CO DifiN - T I / D O N G HOA
Hudng tuyen lya chgn phii hgp nhit so vdi cdc hudng tuyln van khdc trong dieu kipn dja hinh thyc t l cua khu vye, bdi da dap irng dugc ddng thdi cdc yeu d u : do dai van chuyin ngan nhat, su dyng duy nhit 1 trgm d i n dgng, hgn ehl tdi da giao d t vdi cdc cdng trinh xdy dyng da cd, do vdy, khdng phai giai phdng mgt bang.
- Vdi hudng tuyen lya chgn, ndng suit vgn tai yeu d u , bang tai thiit ke cd thdng sd ky thudt eg ban nhu tren bang 1:
* Tong qudt ve tuyln bang:
- Tuyln bdng cd tdng chieu dai 730m, dugc thiit k l udn lugn hinh sin bam theo dja hinh vdi gdc ddc max Id 4°, bang tai lya chpn Id logi bang tai Idng mdng vdi gdc ddc con lan Idng mang Id 30°. Tram d i n dpng bd tri g dau bang vdi 2 dpng ca 1 lOkW (1 dgng eg dy phdng), trgm cang bang ddi trpng vdi hanh trinh cang bang dai 7m vdi khoang 300m chieu dai bang tai ehgy tren sudi, 4 dilm giao cat vai dudng qudc lg, duang npi bg
Hinh 1. Li^a chgn tuyen bang cdng ty bang tai dugc thiit k l tdng sd 18 dam thep td hgp kit clu khung khdng gian vdi khau dp tir 18-36m, ciing vdi nhtrng chan dd td hgp thep kit d u vu'ng chae. NhO'ng dogn bang tai di tren dja hinh phang hoge leo ddi, nui bd tri khoang cdeh 6m khung dam kit clu thdng thudng. Vdi tdng khdi lugng 240 tan thep gia cdng.
- Giai phdp thiit ke:
+ Tgi dilm giao d t bang tai vdi dudng qudc lg thiet k l dam thep td hgp vdi kit d u khung khdng gian quay len dai (18, 21, 24 va36m), dam bao chieu cao an toan tir mat
dudng tdi diem dudi mat dim la 4,5 m (theo quy djnh cua Bp Giao thdng Van tai), cdc cdt dd' thep kit d u td hgp vu'ng chae dam bao cho phuong tien van tai hogt ddng binh thudng, an toan.
+ Dogn bdng tai ehgy tren sudi vdi myc dich giam thiiu try mdng nam dudi Idng sudi can trg ddng chay. Thiit k l dam thep td hgp vdi kit d u khung quay xudng vdi chieu dai 18-36 m (tiiy theo dilu kien dja hinh) cdc cgt dd thep kit d u td hgp dam bao dp ben vu'ng cua kit d u .
+ Dogn bang ehgy tren djg hinh bang phlng, leo ddi nui tien hanh san ggt mgt bang Bing 1 - Dgc tinh ky thugt cua bang tai
TT 1 2 3 4 5
6
Thdng sd ky thugt Ndng suit
Chiiu ddi Tdedd Dp ddc max
Chiiu rOng ddy bdng
Odng ca:
- Md hi$u - Cdng suit - Di§n dp
Dan vj tinh
T/h m m/s
dd mm
- kW
V
Gia tri 200 730 2
±4°
800
2x110 380/660
Ghichu
1 ddng ca du phdng
KHCNM SO 8/2011* C6 DIEN - T I / D 6 N G HOA
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Hinh 2. Dogn tuyen bang ehgy tren su6i
Sudi
Hinh 3. Dogn tuyin bang ehgy tren sudi
tgo b l mgt phii hgp de cd the - Tgp the ky su Phdng May ke Autocad vd phin mIm tfnh si> dyng chan bang tai vdi kit va Thiit bj Md (Vipn Khoa hpc toan kit clu SAP 2000 da
A .. • ' „ ^ji+«r,„o tiir. tron Cong ngh? Md) vdi sy trg thiet k l , kiem tra, tfnh todn cau dgn gan dgt tryc tiep tren ., ^ ,^ \ .\ x .,./. .t A ..o jx ' , .z . mgt bang.
KHCNM S 6 8/2011* CO D I £ N -TLT DONG HOA
A l
Cdt nen sau khi san gat1 ^
Hinh 4. Doan tuyen bang chay tren dja hinh bang phang
Kiem tra dd bin cua dam Hinh 5. Ban ve thiet ke dam 36m
kit d u khung khdng gian vdi Dudi day chung tdi trinh
ehilu dai 18-36 m tdng trgng bay so luge tfnh todn dam do bdng tai (dam 36m) lugngJen^tdi 135 t i n thep. t^ep to hap kit clu khung
Vdi ket cau vtrng chdc, an . . . j - - o/- i u ' * i A + Tai trono tdc duna len . , • J .,• u 1 u-.:» u- khong gian dai 36 m thiet ke "="' ^"^"y ^=*^ "'='"y '^"
toan va on dmh khi dua bang , . , , , H^m nAm rn- tai vao van hdnh sir dung. va tinh toan nhusau: ^ oam gom co.
KHCNM SO 8/2011* CO DIEN -TU DONG HOA
trpng phdn bd theo ehilu ddi cCia dam 36m.
+ Oe viec tfnh toan dugc dgn gian, ta phan bd tTnh tai vd hogt tai vdo 2 dam DBI vd
DB2:
Tai trpng bang tai + vdt lieu phdn bd tren dam DBI ki hipu:
q1=160/2,5*(2,75/2)+160/2,5*
(6/2)=280kg/m.
Tai trpng bang tai + vdt lipu phdn bd tren dam DB2 ki hipu q2=160/2,5*2,75=176kg/m.
Tai trpng bang tai + vat lipu phdn bd tren dam dd cdt nhjp 6m:
q3 = 160/2,5*3=192kg/m b) Hogt tai: ki hipu (p) Tai trpng ngudi di Igi tren sdn coi la phdn bd deu tren dipn tich 2 san cdng tdc Idm bang t i m tdn nhdm = 1,3*100 kg/m^ (lay theo TCVN 2737-1995). O l vipe tinh toan dugc dan gian ta coi gan dung la hogt tai nay phdn bd todn bp va d i u vdo 2 dim DBI vd DB2.
Hoat tai phdn bd d i u len dam DBI ben sdn 2
pi=1,3*100*2,75/2+1,3*10 0*(6/2)= 568,75kg/m
Hogt tai phdn bd d i u len dam DBI ben san 1
dam DB2 ben sdn 2
P2=1,3*100*2,75= 357,5kg/m Hogt tai phdn bd deu len dam DB2 ben sdn 1.
P2=1,3*100*2,75= 357,5kg/m Hogt tai phan bd diu len dam dd cdt nhjp 6m ben sdn 2
P3=1,3*100*3= 390kg/m Hogt tai phdn bd diu len dam dd edt nhjp 6m ben sdn 1
P3=1,3*100*3= 390kg/m.
Sur dyng phin mIm SAP 2000 dua tai trpng tdc dyng len dam ta kiim tra dugc lye dgc tryc tren cdeh thanh cua dam, tir dd ta kiim tra dd bin cdc thanh, cdc thanh chju tai trgng Idn nhit gdm cd:
+ Thanh cdnh tren (LI 20 X 10) chju lye nen N= -9225 (Kg)
'™„ 2,77
I
Tra bang tim dugc (p = 0.48
A^ 9225
=9765
m^spcF 0,8x0,4^246
(kg/cm^) <[o-] = 2100 (kg/cm^) + Thanh gidng dau (2L90x7) chju nen cd N = - 5022,1 (Kg)
A = i ^ = i ^ 2 ^ = 142
'n„„ 2,77
mm '
= 67L5 mx(pxF 0,8x0,3 8;c24,6
(kg/cm^) < [a] = 2100 (kg/em')
- Tinh kiim tra do vdng:
+ Theo quy phgm ddi vdi bdng tai vd dam cau tryc d l hogt ddng binh thudng thi dp vdng Idn nhit phai thoa mdn dieu kien sau:
/ 1 / 600 + Theo ket qua tinh todn dp ehuyen vi Idn nhat cua nut ddn Id:
/ - \,lcm < I 3000
= 5{cm) 600 600 Nhu vdy dp vdng thoa man dilu kipn cho phep.
K i t luan:
Sau 10 thdng ehl tgo, thi cdng, lap d<?c hp thdng bdng tai van tai than tir mgt bang +20 khu Nam v l Xudng sdng Trung tdm mgt bdng +21 Cdng ty than Quang Hanh dd hodn thdnh vd dua vdo vgn hdnh mang Igi nhO'ng hipu qua tich cyc giai quyit v i n d l van tai cua cdng ty, ndng cao ndng suit vgn tai, giam chi phi vgn hdnh bao dudng vd quan trpng nhit Id cai thipn ddng ke mdi trudng sdng tgi viing md./.
KHCNM S 6 8/2011* CO DIEN -TlTDONG HOA
