Nghien oiki & tmiKm
Nghien cuTu che tao va ap dung kip no vi sai phi dien an toan trong san xuat than ham 16
TFOVN TUiBlLN NGA^^
Vien KHCN Md Vinacomin
T
rong nhutig nam qua, cac md than ham Id viing Quang Ninh da bUdc ^ u i p dgng cd gidi hda khai thac v i dao Id. Tuy nhien, khoan nd min van la phUdng phip chinh de phi v8 than, da. Cdng nghi khoan nd min i p dgng tai cac md ham Id chii yeu sU dgng kip vl sai dien an toan loai KV0-8D de kich no thudc nd AHl, thudc nd nhu tUdng diing cho Id than hoae sir dung kip vi sai diin loai KVD-8N de kich nd thudc nd nhu tUdng diing cho Id da P113. Viec nap min thUc hiin bang thii cdng, dau ndi mang no theo cac sd dd ndi tiep, song song hoic hon hdp. Trinh tU nd la vi sai theo hang khi nd min khai thac va vi sai timg nhdm Io min khi nd min dao Id. Trong khai thie, thudng sU dung tU 1 + 3 sd vi sai, trong dao Id thudng sir dung tU 2 H- 6 sd vl sai. Kit qua theo ddi cdng nghi nd min bang kip vi sai diin tai cac md ham Id cho thay, phUdng phip niy cd mpt sd nhUde diem nhU tien dp no ngan (< 3 m); dau ndi mang nd phu'c tap, de bd sot Io min; dp ben day dan dien ciia kip thap, nin hay xay ra hiin tUdng dut diy, dan d i n sU cd min cam, quy md bai min nhd, khi sd IUdng Io min tren gUdng Idn thUdng phai chia lam hai ddt nd; thdigian dau ndi mang no lau. Nhutig nhUde diem trin da anh hudng den tde dp, hiiu qua trong dao Id da. Trong khai thac via ddc, do chieu dai ciia eac Io min ha tran ban che nen chieu cao phan tang trong eic sd do cdng nghi khai thac ldp ngang nghiing, phi nd phin tang thudng ehi dat 8 § 10 m, lam ting chi phi met Id chuan bj, ning suit lao ddng va san IUdng thap.
Mdt sd nude cd nen cdng nghiip khai thac than phat trien da nghien culi, ehe tao kip nd vi sai phi diin an toan sU dgng de nd min phi da trong than ham Id, die biit la cac md cd nguy hiem ve khi va bgi no. Ba Lan va Slovakia da ap dgng sd do cdng nghi khai thie chia Idp bang. Id dpc via phan tang, nd min trong Io khoan dai sU dung kip nd vi sai phi dien an toan ap dgng cho dieu kien via diy, ddc. Trong cac sd do cdng nghe nay, chieu cao phan tang lin den 30 m, nap min bang thii cdng hoic bang miy (sir dgng khi nen). Vlic nang chieu cao phan tang len 2,5 -^ 3,0 lan da gdp phan nang cao hiiu q u i v i an toan trong khai thac via day ddc nhd giam chi phi met 16 chuan bj (tir 2 ^ 3 lan), giim chi phi bao v i , chdng xen Id chuan bj, ning cao nang suat lao ddng. Mdt sd nUde nhU Thgy Oien, CH Sec, Ao da sU dgng kip nd vi sai phi diin an toan de dao cie dUdng 16 trong da tai cac md cd khi va bgi no. Trong trUdng hdp nay, Bang 1 - Dac tinh Icy thuat cua kip vi sai phi dien an toan
Thong so ky thuat
DUdng kinh danh nghTa diy dan tin hiiu nd Tde dp dan tin hiiu no
Od ben keo eua diy dan tin hiiu nd Chiiu dai day dan tin hiiu nd
Mau sac diy dan tin hiiu nd . ^ , ^ _ _ _ _ _
Ddn vi tinh
"' mm ' m/giay
' K G ' m
Ghi chit
3,0
> 1700
>25"^
2H-300
,„a/«. » i - i>
Miu sic nhan kip va mdc chii' J Vat lieu lim vd kip
9 10 11 12 13 14 15
Chieu d i i vd kip
oudng kinh ngoai eiia kip CUdng dp no ciia kip
Op ben mdi ghep mieng ciia kip Kha nang chju nUdc eua kip Sd kip vi sai
Thdi gian vi sai
mm mm
KG
Theo yiucau dd"
da cam ddng Mo 52-5-62
max 7,1 sdS
gid
Mill giiy
2,0 8 10 25 + 400
40| KHOA HQC & C O N G NGHE • (S6 7 - 9/2011)
Nghien cihi & MBBwaaai
An toan la UU tien hang diu trong khai thie than ham Id - Anh: TL kip nd vi sal phi diin an toin thudng dUde sU dgng vdi Io khoan sau, tien dp no Idn (> 3 m), thudc nd cd siTc cdng phi Idn va da gdp phan nang cao tde dp dao Id va an toin lao ddng.
Kip vi sai phi diin vdi nhieu UU diem nhU giim thieu tie ddng mdi trUdng do chan ddng, giam khoing each d i ving v i dp on; dp an toin v i dd tin cay cao do kip nd phi diin khdng chju t i c ddng eiia ddng dien tap, ddng cam utig, sdng diin tir; tao dUdc nhieu sd dd nd vdi cie cap vl sai khic nhau de ding va thuan Ipi; ning cao sin IUdng khai thie; glim ehi phf xit ly 6a q u i ed sau nd min; nang cao ning suat miy xuc bdc. Kip vi sal phi diin eung da dUde sir dgng tai cie md Id thiin Viet Nam, chii y i u I i loai KVP-8N.
Oe giii quyet nhutig khd khin, tdn tai eua cdng nghi nd min tai cie md than ham Id, nam 2010, Bd Cdng ThUdng da giao eho Viin Khoa hpc Cdng nghi Md thyc hien de tai:
""Nghiin ciTu ap dgng cdng nghi khai thie v i d i o Id sU dgng kip vi sai phi diin phdng nd c h i tao trong nUde". Mge tiiu chinh eua de t i i I i nghiin culi sin xuat kip nd vi sai phi diin an toan tai cie nha miy hda chat trong nUde va de xuat, xiy dgtig dUde eic sd dd cdng nghi, hd chieu trong dio Id v i khai thie sir dgng loai kip t r i n nhim nang cao hiiu qua, an toin sin xuat.
Trin cd sd kinh nghiim ciia nUde ngoii v i kinh nghiim nghiin ciili, c h i tao kip nd vi sai phi diin siT dung cho cie md Id thiin, Viin Khoa hpc Cdng nghi Md - Vinacomin da phdi hdp vdi Cdng ty TNHH MTV Hda chat 21 (Nhi miy Z121- Bd Qude phdng) nghiin culi, che tao kip vi sai phi diin an toan. Die ti'nh ky tiiuit eiia kip nd vi sai phi diin an toan dUdc gidi thiiu bxjng bang 1.
Cie sin pham kip no vi sai phi diin an toin ham Id c h i tao ttiir nghiim da dUdc kiem ti^ tai Nhi may Z121 v i no thijf nghiim trong mdi trUdng cd khi no tai phdng thi nghiim eiia Trung tam An toan Md (Viin Khoa hoe Cdng nghi Md) de ki^m tra an t o i n . PhUdng phip no thir nghiim dUcJe chon xay dutig b ^ cd sd mdt sd tiiu chuan cua nUde ngoai nhU: Tiiu chuan cua Ba U n PN-92/C-86015 "Th^ nghiim dd an t o i n ciia thudc no doi vdi khi mitan"; Tiiu chuan
cdng nghiip ciia Nhat Ban, JIS K4821-1971 ve kip nd an toan,... Trong nam 2010, ed 60 chiee kip vi sai phi dien an toan do Nha miy Z121 che tao da dUdc nd thU nghiem trong budng nd kin cd ham IUpng khi mitan 9 o 0,3% va da cho k i t qua kha quan, tat ca cie kip nd thU nghiem khdng giy chiy, nd, khdng phit tia lira ra ngoii mdi trUdng. TU cac k i t q u i dat dupe, Viin Khoa hpc Cdng nghi Md va Nha may Z121 da bao cao Tap doan Cdng nghiep Than - Khoang sin Viet Nam (Vinacomin) v i de nghj Bd Cdng ThUdng phi duyet "PhUdng phap thU nghiem danh gii kha nang an toan ciia kip no vi sai phi dien diing trong md ham 16 cd khi mitan", cho phep ehe tao kip nd vl sai phi dien an toin theo k i t qui nghiin culi cua de tai de sU dgng trong san xuat than ham 16.
Song song vdi qua trinh nghien culi che tao kip no vl sai phi diin an toan, de tai da nghien cUU va de xuat cac sd dd cdng nghe trong khai thie via ddc, cd ha tran than ndc va sd dd cdng nghi dao 16 da sU dung kip nd vi sai phi diin an toin.
TU ket qui nghiin culi eiia de tai, nam 2010 Viin KHCN Md da trien khai ap dgng cdng nghe dao 16 d i sU dgng kip nd vi sai phi diin an toan ham 16. Do tien dp c h i tao kip nd vi sai phi diin an toin trong nUde cham, nin Viin ciing vdi eic md da xin phep va dUpe sy chap thuan eua Cue Ky thuat An toan & Mdi trUdng cdng nghiep - Bd Cdng ThUPng cho phep ap dgng cdng nghi dao Id da i p dgng kip nd vi sai phi diin sU dgng cho eic md Id thiin (kip diin KV0-8N) cho eac doan 16 d i khdng cd khi mitan. Cdng nghe dio Id d i sU dgng kip vi sai phi diin dUdc thyc hien gidng nhU cdng nghi sU dgng kip vi sai diin, ehi khie ve sd dd dau ndi mang nd, phu kien nd, may nd min.
Theo dinh g i i , cdng nghi dao 16 d i nd min sU dgng kip vi sai phi diin tai eic md ham 16 Quang Hanh, Nam Mau, Odng Vdng, Hdn Gal, Odng Bac,... eho k i t qui rat khi quan. Cg the nhU sau:
- Tde dp dio 16 dat 60m + 65m/thing, ting 10m -^ 15 m/thing; nang suit lao dpng dat 0,06 -^ 0,08 m/cdng.kip;
cie chi tieu khae nhU chl phi kip nd, thudc nd gan nhU khdng thay ddi so vdi cdng nghi da i p dgng trUdc diy. Tde dp dao Id tang nhd thdi gian dau ndi mang nd giim, rut ngan thdi gian thl cdng, dUa eic khu khai thie mdi sdm di vio boat ddng.
- H i sd sU dgng Io min dat tii 90% H- 95%, ty le d i qui cd cdn 5%, ty I i d i ed cd hat tii 100mm + 300mm dat 20%
•i- 25%, ty I i da CO cd hat nhd hdn 100 mm dat 70% -;- 75%.
Chat IUdng phi v3 dat d i tdt, gdp phan nang cao ning suat xuc bde, van tai.
- Cac hiin tUdng nhU dut day, min cam dUde loai bd hoan toan, sd do dau ndi mang nd ddn giin, thao tac dau ndi nhanh, kiem tra de ding bang mit thUdng, thdi gian dau ndi mang no glim 60% -^ 70% so vdi sU dgng kip diin, miTc dp an toin va dieu kiin lam viic eiia ngUdi lao ddng dugc cii thiin.
Kip nd vl sai phi diin an toin dang dUde cie ed quan quan ly xem xet de cap giay phep ehe tao quy md cdng nghiip v i sU dung rdng rai trong sin xuat than ham 16 tai Viit Nam.*
(S6 7 - 9/2011) < KHOA HQC & CdNG NGH^ |41
