Thong tin khoa hoc cong nghe mo/ NGHIEN CUTU LUA CHON GIAI PHAP PHUC HOI MOI TRlTOTNG CHO Dir AN DAU TIT KHAI THAC MO SAT NA RUA CAO B A N G The mining project for Na Rua iron ore mine which has been[.]
Thong tin khoa hoc cong nghe m o / NGHIEN CUTU LUA CHON GIAI PHAP PHUC HOI MOI TRlTOTNG CHO Dir AN DAU TIT KHAI THAC MO SAT NA RUA - CAO B A N G The mining project for Na Rua iron ore mine which has ThS BUI THANH HOANG been carried out by Mineral Corporation - Vinacomin KS LE THANH TUNG will provide materials for many industrial sectors and KS NGUYEN DLTC CONG bring back lots of economic interests and Jobs to localVien Khoa hgc Cdng nghe Md - Vinacomin inhabitant However, the project will cause harmful impacts to natural environment and local society In this paper, the authors refer to the selection of technical solutions for environmental reclamation at Na Rua iron ore mine after the mine closure Mo'dciu Cao Bang la mpt tinh nghep d mien nui phia B l e cua Vift Nam, t i c dp phat triin kinh t l , xa hpi so vdi cac tinh miln xu6i cham Tuy nhifn, tilm nang ve tai nguyfn khoang san d Cao Bing Igi da dgng va cd chit lugng tit, thugn Igi cho phat triin nganh khai thac va c h l biln khoang san Chinh vi vay ma dy an "Diu ty khai thae 16 thifn md s i t Na Rya, C6ng ty c l phin Gang thep Cae Bing, Ting C6ng ty Khpang san - Vinacemin dgt 350.000 tin/nam" da dugc Tap doan d i u tu thyc hifn Day la nguIn nguyfn lieu r i t t i t cung c l p chp nganh luyfn gang, thep dem Igi hifu qua kinh t l , xa hpi che dja phygng, nang cao ddi sing cac dan too tinh Tuy nhien, b f n cgnh cac tac dpng tich cyc, nd cQng se gay nhu'ng tae dpng tifu cyc d l i vdi cae phin mdi trudng t y nhifn va xa hpi cua khu vyc thyc hifn dy an va vOng phu egn Treng qua trinh khai thac, kit thuc khai thac mo se tgo cac moong khai thac va bai thai d i t da lam anh hudng tdi d i l u kifn t y nhifn, canh quan, m6i trudng, tham thyc vat X u l t phat tO' nhQ'ng v i n de trfn, c i n thilt phai cd cac giai phap eai tap, phuc h i i mdi trudng khu vyc khai trudng, bai thai sau k i t thOc khai thae phO hgp vdi cae quy djnh phap lugt cua Nha nudc v l bao v f mdi trudng va eae van ban hudng d i n bao v f m6i trudng khai thae khoang san Lya chpn giai phap t l i uu, vCra dam bao y f u c l u ve bao v f m6i trudng va phye vu Igi ich ngudi, vO'a dam bao tinh kinh t l cua dy an la mpt nhiem vu c i n thilt S c lu'O'c v l dip an khai thac mo s i t Na Rua Md sat Na Rua thupc phudng Tan Giang va mpt phin thupc xa Hoa Chung, thj xa Cao Bang, tinh Cao Bang, CO difn tich 1,8 km^ Md nam d dp cao 200m ^ 400m, dilm cao nhlt la 419m, co dja hinh phan cat phCpc tgp Quang sat cua mc dugc phan b l g hai khu rifng bift: khu Bae va khu Nam each 500m Theo bao cao tham md sat Na Rua - Cao Bang Lien doan Dja chit D6ng Bac thyc hifn, Khu Bac md ed KHCNM s o 6/2011* MOI TRUdNG MO than quang (TQ.1 va TQ.2) nam d d f sau tCp -100m trd Ifn Than quang TQ.1: Cd chilu day trung binh 27,0m Ham lygng Fe tugng d l i I n djnh vdi ham lugng trung binh la 58,87% Fe Thanh phin khoang vat ehu y l u la magnetit, hematit, mactit, it pyrit, maganit, psilpmelan Than quang TQ.2 cc kich thude nhd, vdi chilu day trung binh la 6,0m, ham lugng trung binh Fe = 59,17 % Tgi khu Nam cae than quang ed kich thudc nhd hgn nhieu K i t qua cac cdng trinh tim kilm tham da xac djnh dugc m6t than quang g l c (TQ.3), mpt than quang deluvi (TQ.4) va mpt I quang phan b l rai rac Trcnc dd than quang TQ.3 ed ham lugng Fe biln thifn tO' 50,26% d i n 62,50% Vdi phuong an khai thac lya ehpn la khai thac 16 thifn ed cdng suit khai thac hang nam la 350.000 tin/nam, t u l i thp ddi md keo dai 28 nam ( k l ea md va ddng cu-a) dieu kifn tru" lygng dja chit khu md la 13.707.554 t i n quang, try lygng huy dpng la 12.033.200 t i n quang va tru lugng c6ng nghiep la 11.929.500 t i n quang ^Thong tin khoa hoc cong nghe mo j Tliao kito \'i, i ! thoat n u o c m o ! [ B c