Thong tin khoa hoc cong nghe mo
CME T 6 0 QW KHUNG THUY LUC Di DQNG TRONG NU6C VA KET QUA AP DUNG THUT NGHIEM TAI CONG TY THAN NAM MAU
So far, 10 hydraulic moving supports GK/1600/1.6/2.4/HTD have been made In Vietnam under the coordination of Institute of Mining Science and Technology (VIMSAT), Vinacomin Machinery Company and Energy and Mining Mechanics Institute. The paper represents the initial results from the pilot application of the domestic hydraulic moving supports to the longwall at the level of +150 •/• +180 of the coal seam 5 TIC ^ T.I at Nam Mau Coal Company and from these results, the paper also provides some conclusions and proposals
KS. CHU QUANG DjNH KS. NGUYEN KHANH MINH Vl§n Khoa hoe Cdng nghe Md • Vinacomin
' KS. DANG THANH BiNH
Cdng ty Co phan Che tao Mdy - Vinacomin
Gid khung di dpng (cdn gpi Id gid khung thuy lue di ddng) ed x u l t Xli t i i Trung Q u i e , 6wgc cai t i l n , hodn thipn tren ea sd gid thuy lue di dpng logi XDY, ed he t h i n g thuy luc d i l u khiin tap trung, tuan hodn, b l sung he khung d d lien k i t cde gid thdnh mpt ehinh t h i vd mpt s l ehi tilt, k i t d u phg khdc.
Logi vi c h l n g nay da d u g c dua vdo dp dgng tgi mpt s l md ham Id vung Quang Ninh t i i ndm 2007
D l ddp ling yeu d u eung e l p phg tung thay t h i kjp thdi, t i i nam 2008, Vien Khoa hpc Cdng nghp Md Vinacomin (Vipn KHCN Md) da phli^hgp eung Cong ty C l p h l n C h l tgo Mdy-Vinaeomin (VMC) nghien ciiu, c h l tgo mpt s l bp phgn eua gid khung thuy Ig'c di dpng nhu cdt thuy lu-c, t i m c h i n da, t i m da guang vd dua vdo dp dung trong thue t l san x u l t tgi eac md than ham Id n h u Hd L i m , T h i n g N h l t , Nam Mau, Cam Thanh, Duang Huy.^Khe Cham, v.v... Qua thu-c te s i i dgng cho t h l y , cac bd phgn n4u tren cua gia khung 6\jgc
c h l tgo tgi Vipt Nam ed kha ndng Idm vipe tuang duang so vdi san p h i m dugc c h l tgo tgi Trung QuIc, c h i t lugng dam bao theo yeu d u t h i l t k l .
T i i nhung kinh nghiem thue t l dd, thuc hipn Q u y l t djnh s l 844/QD-TKV ngdy 20/04/2010 eua T i n g Gidm d i e Tap dodn Cdng nghiep Than Khodng san Viet Nam, Vipn KHCN Md da p h i i hgp vdi Cong ty VMC vd Vien Ca
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khi Ndng lugng vd Md nghien eiiu, t h i l t k l , c h l tgo gid khung thuy luc di dpng GK/1600/1.6/2.4/HJ (hinh 1), trudc mat chf c h l tgo p h l n k i t d u ea khi, edn hp t h i n g thuy Ig-e vdn nhdp k h l u . Giai dogn d i u c h l tgo 10 bp, dua vdo s i i dgng thg-c t l , lam ca s d d l m d rpng c h l tao.
Dgc tinh ky thugt eua gid khung di dpng GK/1600/1.6/2.4/HT dugc trinh bay trong b a n g !
Hinh 1. Gid khung di ddng GK/1600/1.6/2.4/HT
KHCNM s o 2/2012-* CO DIEN - Tl/DONG HOA MO
Thong tin khoa hoc cong nghe m o
Bdng 1. D^e tinh ky thudt eua gid khung di dgng GK/1600/1.6/2.4/HT
TT
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Ten ehi tieu
Chieu cao ldn nhlt Chilu cao t i i thieu Hdnh trinh piston Chilu rOng gi^
Chilu ddi gid
Bu'dc tien cua tam dd gu-ang So cOt thuy Ig-c cua gid Tai trong ban d i u Tai trpng ldm vi^c Ap suit bam
Du-dng kinh xilanh cOt Cu-dng (50 chlng dd G6c doc Idm vi^c
G6c doc Idm vi$c theo phu-cyng Khoang cdch chong giu-a 2 gi^
Dan vj tinh mm mm mm mm mm mm CSi KN KN MPa
mm MPa
dO dO mm
Gid tri
2400 1600 800 960 2950
800 4 1197 1600 31,5
110 0,56
£35
±15 1020
So vdi eua Tnjng QuIc, gid khung GK/1600/1.6/2.4/HT cd mpt s l thay dii v l kit d u eho phu hgp vdi dieu kipn vung Quang Ninh, dd la, chilu day cde mli hdn lien k i t cua xd Idn han nhdm tdng dp b i n , tuli thp cua gid khung; t i m djnh vj t l hgp thilt bj thuy luc duge clt ngin d l thudn tipn eho qud trinh di lgi trong Id chg. Cde bd gid khung c h l tgo, qua kilm djnh, hodn todn dam bao yeu d u ky thugt v l kha ndng chju tai, ed t h i vgn hdnh binh thudng, du tieu chuan dua vdo sii dgng.
Dk hodn thipn thilt k l , c h l tgo gid khung di dpng GK/1600/1.6/2.4/HT, trudc khi md rpng c h l tgo, Vipn KHCN Md da phii hgp vdi Cdng ty TNHH MTV than Nam Mdu (Cdng ty than Nam Mdu) t i l n hdnh dp dgng thii nghipm logi vi chlng ndy.
Dja dilm 6\xgc Ig-a chpn dp dung thii nghipm Id Id chg
miie +150 ^ +180 via 5
T.ICH-T.I (bien ban Idm vipe ngdy 05/07/2011), trong dd 10 bp gid khung thii nghipm duge l i p ddt d chdn Id chg, 79 gid khung edn Igi sii dgng logi gid khung eua Trung QuIc.
Dgc dilm khu vue Id chg dp dgng thii nghipm: chilu day via trung binh 4m, gde d i e via trung binh 16° trpng lugng t h i tich eua than: y =
1,74T/m^- vdch tru-c tilp Id bpt
k i t phan b l khdng d i u . ehieu day trung binh 6,0m,an = 35,2MPa, Y = 2,58T/m^; vach ca ban la bpt k i t xen ldn cdt kit, chilu day 4,03 ^ 9,59 m, an = 61,U98,7 MPa, y = 2,62 T/m^ trg trg'C tilp Id bpt kit, chilu ddy tii 1,2-f-26m, tnjng binh 15,2m, an = 31,7^58,9 MPa, Y = 2,64T/m^
Ld chg dp dgng cdng nghp khai thde k h l u Idp tru hg trin, k h l u than d guang blng khoan n l min vd ha trin, thu h i i than n6c.
Dk theo ddi diln biln dp Ig-e md tdc dpng d i n gid khung thii nghiem, nhdm thg-c hipn da l i p ddt ding h i do dp lue tu- ghi ky thugt s l LEO Record (Ei). D i n g h i dugc lap dgt tgi cpt chlng lulng phd hda, gid s l 5. Hinh 2 t h i hien mdt trgm do dp lue trong Id chg.
Sau khi phd hda ban diu.
Id chg khlu thudng ky, tiln dp 0,8 m, 3 ca khlu hai ehu ky. Trong qua trinh theo ddi sg- Idm vipe eua cdc bp gid khung nhgn thly, sau m l i budc khlu chlng. phln than ndc vd da vach trg-c tilp tg- sgp d l .
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VI tn lap d6ng h6 do Sp li/c
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1
CMDdng hd do dp luc tu ghi
lim chin del
b. Vi tri lap dat Hinh 2. Tram do dp lyc
KHCNM SO 2/2012-* CO DIEN - TlT DONG HOA MO
Thong tin khoa hoc cong nghe mo
Hinh 3. Bieu do theo ddi dp lyc md tai khu vyc 10 bg gid khung dp dyng thu- nghidm
Cde m l i hdn lien kit cd chit lugng tit, khong bj bong hoge rgn nCrt.
Hinh 3 the hipn bien dpng dp Ig-e md len gid chlng thii nghiem, vdi ede thilt Igp du lipu duge luu tru trong thilt bj, trong dd:
suit LEO Dai do dp
Record (Ei):0^70 MPa.
Sai s l todn dai LEO Record (Ei): ±0,1 %FS (0^50 °C)
Nhiet dp bao quan/ldm vipc:-10^60°C/0^50°C
Vdi diln biln dp lue md nhu tren, ede vi chlng thii nghiem eung nhu Id chg hogt dpng binh thudng.
Sau han hai thang Idm viec, cd t h i ddnh gid v l 10 bp gid khung dp dgng thii nghipm nhu sau:
1. Ve kit cau co' khi
Cdc k i t d u ea khi chinh gIm xd, t i m chan guang, khung treo, thanh gilng lien kit khung, hop n i i khung vd tim chan da, trong qua trinh su dung khong c6 nhung biln dgng Idn. Mpt s l biln dgng nhu meo t i m chin dd gia s l 3 hay vj tri lien k i t giang khung gid s l 5, 7, 8, 9 Id do trong qua trinh su dgng, cdng nhan Xli ly chua tit.
Dp ddn h i i cdc chit p chua eao, cd t h i bj tut trong qud trinh thao tdc d i n d i n ede chit lien kit t i m chin dd, t i m chin guang, lien kit khung bj tgt ra trong qua trinh lam vipe.
Tuy edn mpt vdi t i n tgi nhung kit d u ea khi ede bp phgn eua gid khung dam bao chle chin, an todn, Idm vipe I n djnh.
2. He thong thuy lyc Cdc cpt chlng thuy Ig-c vd ede kieh thuy Ig-e cua gia (kieh di chuyin xd, t i m chin guang vd kieh d i y cgnh) hogt dpng I n djnh.
+ B l mgt piston cua cpt vd cde kieh thuy Ig'c tran bdng, khdng phdt hipn thly hipn tugng han gi, bong Idp mg hoac biln dgng.
+ Gioang, phdt dam bao dp kin khit, khdng bj rd djch ra ngoai khi lam viec. Rieng cpt chlng sau gia s l 6 bj rd djch tgi vj tri tay d m khi thu cpt (trong gidi hgn cho phep).
Cdc dudng ong djch khdng bj han gi, rgn niit, hd Idi thep.
+ Cae hien tugng buc dudng Ing hoge g§y d i u Ing Id do khi b i n min khong che chin theo bipn phdp.
+ Cde vj tri rd djch, ngodi nguyen nhan do chit lugng giodng phdt, edn do cong nhdn trong qud trinh van hdnh, thdo cdc dudng Ing djch d l thay t h i hoae ldp sung bam cpt thuy lu-c dan khdng lap tra Igi nguyen trgng hodc vp sinh chua sach khiin d i t cdt Ipt vdo Idm hdng.
Cde tay dilu khiin, van thuy lue (van d i u cpt, van an todn, v.v...) vd khod thuy lue hogt dpng tit, Idm viec I n djnh theo dung yeu d u ky thuat.
Tdm Igi, he thing thuy luc dam bao eung elp djch cho gid khung hogt dpng I n djnh, cpt chlng san xult trong nude chit lugng tit, hogt ddng binh thudng.
Kit luan va kiln nghj Sau han hai thdng triln khai dp dgng thii nghipm 10 bp gid khung thuy luc di dpng logi GK/1600/1.6/2.4/HT c h l tgo trong nude tgi Id chg miie +150-^+180 via 5 T.IC-^T.I - Cdng ty than Nam Mdu, bude d i u da ed k i t qua kha quan, ede bd gid khung nay Idm vipe I n djnh, ddp iing 6\jegc yeu d u chlng giu Id chg, dam bao an todn, d l van hdnh.
Kit qua dgt dugc Id tiln d l 6k tilp tuc c h l tgo logi gid khung thuy Ig-e nay, thay t h i cde san phim nhap ngogi, ding thdi tilp tgc nghien eiiu thilt k l eai tiln cho phu hgp han nua vdi dilu kipn dja chit vung than Quang Ninh./.
KHCNM s o 2/2012* CO DIEN - TV DONG HOA MO
