Thong tin khoa hoc cong nghe mo CAC VAN DE LIEN QUAN DEN GIAI PHAP DAO CHONG LO QUA VUNG DA YEU ROI RAC, PHAY PHA, DUTT GAY, CHllA NlTGfC Carrying out drifting and supporting works through areas havin[.]
Thong tin khoa hoc cong nghe m o CAC VAN DE LIEN QUAN DEN GIAI PHAP DAO CHONG LO QUA VUNG DA YEU ROI RAC, PHAY PHA, DUTT GAY, CHllA NlTGfC Carrying out drifting and supporting works through TS LE VAN CONG areas having complicated geological conditions such TS PHAM MINH BLfC as faults, weak rock and water bearing fractures related KS.PHf VAN LONG to high ground pressure, ground water into mines is Vien Khoa hgc Cdng nghe Md - Vinacomin a very hard task The paper deals with some issues related to these above mentioned phenomenon and optimum solutions for overcoming them D i t da y l u h l u h i t la lien quan d i n phay pha, dCpt gay, d i t da r6'i rac chCra nuac Phay pha, dCpt gay thuo'ng gay sy danh gia khong chinh xac v l dp b i n khii da, dilu kien Crng suit ban d i u va nuo'c ngim Trong bai bao cac tac gia gi6i thieu cae phuang phap khao sat va xay dyng duo'ng 16 d i t da y l u va mo ta phay pha, dCrt gay theo quan d i l m cua d i l m dja ky thuat Sy xem xet dae biet dugc thyc hien t i t ca cac giai doan xay dyng eong trinh qua d i t da y l u Nhiem vu quan trpng qua trinh thilt k l la djnh tuyin, khao sat dja ky thuat, lya chpn tuyin, lya chpn phuang phap xay dyng, thilt k l , va xac djnh thiu, cho phep tao s y linh hoat qua trinh xay dyng Khi xay dyng, thu thap dCp lieu va danh gia eung nhu giam sat cong trinh eho phep cap nhat dilu kien dja chit, tinh chit khii da Dya tren ca SO" cac thong s l dao va chong co t h i dugc dilu chlnh theo dilu kien thyc t l , dam bao an toan lao dpng va tilt kiem chi phi Xay dyng h i m , 16 dilu kien dat da y l u phu thupc h l u h i t vao kha nang cua cac ky su dja ky thuat thi cong va thilt k l Viec danh gia va ghi ehep d l y du t i t ca cae d u lieu lien quan se tao he thing eg so" du' lieu cho phep cac ky s u dja ky thuat quan sat xu huo'ng va xac djnh tuang quan giCpa cae y l u t l D i l u dae biet quan trpng d l i vo'i khii da khong ding nhlt la e i n phai dilu ehinh thuang xuyen cac thong s l ky thuat dao va chong 16 pha dCpt gay thu6'ng nam vong d i n 10 km phia tren cua 16'p vo Trai D i t va dugc danh gia eo la tinh khong ding nhlt cao, dtjac chia eat bing cac vung v6 Dang dCrt gay xuat hien thuo'ng la v5' elt va tru'gt djch Mpt hier tugng dae trung cua vung phay pha la s y xult hien ngiu nhien cua cac khoi da m l eoi Cac khii da it bj thay doi, biln chit, va khong bj biln doi hinh dang, Dat van de chung chu y l u c6 dang t h i u Bien phap than trpng dao kinh vo'i kich thu6'c khae ching duang 16 dilu kien va c6 t h i dat to'i dp la'n len dja chit phCpc tap la c i n thilt nham giam chi phi, th6'i gian xay d i n vai tram met Cac khii dyng va dam bao ky thuat, an dugc bao bpe bd'i eae vat toan Bien phap ein bit d i u tCp lieu dang nat, bun MCPC dp lap thilt k l ca so', lya chpn quan trpng Jja ky thuat eua tuyin, lya chpn phuang phap vung phay pha n i m 6' tinh thi cong, cung nhu lap cac khong d i n g nhlt cua no Ty le hgp ding va lya chpn nha thiu vung set m i m d l i vo'i cac kich Trpng qua trinh thi cong, can co CO", hinh dang khae nhau, nhQ'ng nguai co kinh nghiem cu6'ng dp cua da manh vo' c6 xay dyng, giam sat, theo doi va t h i biln thien cyc ky lo-n quan ly hien tnj'6'ng Y l u t l quan trpng khae la Nhilu v i n d l kho khan sy biln d l i la'n cua nuo'c phat sinh thi cong h i m , 16 ngam Cao dp myc nuo'c ngim di qua cae do'i phay pha dCpt cpng VO'I ;^p lye myc nuo'c gay Do'i phay pha dCpt gay la ngim va hu 6'ng d6ng chay gay vung phCpc tap, chilu rpng tCp m i t I n djnh thi cong va vai diximet d i n vai tram met, lam cho hieu qua thoat nuo'c biln dang trugt vai rit kem, eae bien phap chong cud'ng dp r i t eao Do'i phay giCp se eye ky kh6 khan KHCNM s o 5/2011'* CNKT HAM LO Thong tin khoa hoc cong nghe mo NhuTig kho khan ve dja ky thuat chu y l u co t h i gap phai dap 16 qua vung phay pha la: • Sy m i t I n djnh b l mat • Dao vo'i he s l thCpa thilt dien 16'n • Biln dang nen ep hoae truang na eua d i t da vung phay pha • Sy m i t I n dinh cua cac giai doan xay dyng trung gian va nu6'c chay vao qua nhilu k i t hgp v6'i d i t da y l u Cong tac khao sat Khao sat dja chat c6 t h i dugc chia nhilu giai doan: • Xem xet cac dCp lieu hien CO • Khao sat b l mat • Mo hinh sa bp • Khao sat ngim va thi nghiem • Xay dyng mo hinh dja chit Song song v6'i qua trinh la viec xem xet ca hpe danh nhim thilt lap cac tieu ehi cu t h i eua dy an Danh gia rui ro c i n phai dya tren ca SO" dilu kien va yeu elu cu t h i eua tCpng dy an Cong tac thiet ke Viec Ilia chpn loai vi chong thich hdp cho cong trinh ngam la mpt van de phCrc tap nhat b l i mpt so 16n cac tieu chuan khong ehe va su" kh6 khan ve viec djnh lUdng chung Cac tieu ehuan de xem xet, iLfa chpn vi chong chia lam loai: + Dat da xung quanh ham 16 Cac thfing s6 dia ca li§n quan + PhL/dng phap xay diing Cong viee quan trpng thilt k l la lap mo hinh eg hpe khii da, xae djnh tinh chit cua khii da dpc theo tuyin h i m , xac djnh, danh gia cac thong s l khii da, phan tich Crng suit va djeh chuyin xung quanh cong trinh Mo hinh phan tich hoac mo hinh s l dan gian c6 t h i duge SCP dung cho muc dich Xac dinh cac loai da Phirong chieu he l