CNM KHOA HOC VA CONG NGHE MO
MOT SO CONG NGHE VA THIET Bj TIEN TIEN PHUC VU CONG TAC KHOAN-NO MIN TREN MO LO T H I I N
PGS.TS. BUI XUAN NAM, ThS. NGUYEN DINH AN, KS. N H Q V A N PHUC - Tru&ng Dai hgc Mo-Dja chat
1. Djnh vj mang 16 khoan bing cong nghe GPS GPS (Global Positioning System) la he thing dinh vj toan c l u , eho phep xac dinh duge vj tri, t i c dp va thdi gian cua b i t CCP ddi tugng nao tren b l mat trai d i t vdi dp chfnh xac cao dya tren cac tfn hieu radio dugc phat ra tCp cac ve tinh. He thing nay tinh toan khoang each giCra d i i tugng eln xac djnh tCp nhipng ve tinh khac nhau trong he thing dya tren nguyen t i c tam giac. Dk xac djnh duge cae s l lieu v l tpa dp x, y, z va thdi gian tuong Crng cua mpt ddi tugng, he thing nay yeu elu t i i thilu 4 ve tinh. Hien nay, ngudi ta thudng SCP dung he thing djnh vj toan c l u NAVSTAR (USA's Navigation Satellite Timing and Ranging) cua My va G L O N A S S (RUSSIA'S Global Navigation Satellite System) eua Nga.
Viec Cmg dung GPS tren md Id thien eho phep ngudi quan ly md nlm dugc mdt each chinh xac vj tri va thdi gian thye cua bit ky thilt bj nao tren md nhu may khoan, may xuc, may ui, d td, may gat,... cung nhu tinh trang van hanh cua cac thilt bj nay, gdp phin dilu hanh chung hoat ddng cd hieu qua nhit.
Tai phdng dilu khiln trung tam, thdng qua he thing GPS se xac djnh dugc chfnh xac vj tri eua cae thilt bj md tai mpt thdi dilm xae ^nh cung nhu cac thdng s l ky thuat cua nd, do dd cho phep ngudi quan ly cd t h i giam sat, kilm tra va dilu khiln qua trinh lam viee cua cac thilt bj tren md mdt each hgp ly, kjp thdi va dat hieu qua cao. Hinh 1 minh hpa mil lien he giu'a cac ve tinh, phdng dilu khiln trung tam va cae thilt bi tren md Id thien khi su" dung cdng nghe GPS.
Mat khoan
1
May xiic
1
() to t'iic llilel bi phu Iru
Phono e m
H. 1. Minh hoa moi lien he giira cac thiet bi trong cong nghe GPS
Trong cdng tae khoan, he thing GPS cho phep ngudi van hanh may khoan cd t h i khoan chinh xae mang lo khoan theo yeu c l u ma khdng c i n ban d l dja hinh, vi mang Id khoan se dugc phdng dilu khiln trung tam cua md gu-i trye tilp d i n may tfnh dilu khiln g i n tren cabin may khoan. Man hinh dilu khiln nay se cung c l p chfnh xac hinh anh va cae thdng s l cua cac Id khoan eln khoan trong khdng gian 3 chilu (3-D). Trong qua trinh khoan, cae cam biln cua may khoan se cho bilt dly du eae thdng tin v l vj tri Id khoan, chilu sau, t i e dp khoan, nang suit khoan va tfnh chit cua eae loai d i t da dpc theo chilu sau Id khoan,... Cac thdng tin trong qua trinh khoan tCrng lo khoan trong mang lo khoan se dugc chuyin trye tilp tdi xe tai nap thuoc no sau dd. D i l u nay cho phep t i i uu dugc cdng tac nap min, gdp phin nang cao hieu qua cdng tac khoan n l min, cai thien dugc chit lugng dap vd d i t da. '
2. Kilm tra t i e do nd cua thudc nd bing thilt bj Micro Trap VOD
Thilt bj Micro Trap VOD lam viec dya tren nguyen ly cua phuang phap do day dien trd lien tuc. Thilt bj bao g l m mdt may phat xung chuIn vdi t i n s l c l djnh hoac thay d i i cd dien ap thip (dudi 5 VDC) va mpt ddng dien r i t t h i p (dudi 50 mA);
mpt day dien trd cd dp ding d i u v l dien trd suit (don vj la Q/m hoac Q/ft) dugc dat dpc theo mau thulc n l . Khi n l min, day dien trd nay se bj d i t chay do sdng n l lan truyln dpc theo nd. May do lien tuc phat xung va ghi nhan sy thay d i i dien trd ting cua toan mach tuong Crng vdi chilu dai cdn lai cua m i u thulc n l . Vdi t i n s l len tdi 1 MHz hoac Idn han, thilt bj nay cd t h i do dugc thdng tin vdi dp phan giai tdi phin ngan miligiay.
Cac. phu kien c i n thilt di kem vdi thilt bj Micro Trap VOD d l do t i c dp n l cua cac mau thulc n l nhu thdi thulc va cac cpt thulc trong lo min bao glm:
•:• Thanh do PROBEROD (tiiudng ngln han 1,0 m);
• Day dien trd PROBECABLE (10,4 Q/m) hoac PROBECABLE-LR (3,38 Q/m);
•:• Cap ding true RG-58 (Coaxial Cable);
CONG NGHIEP MO SO 4 - 2 0 1 0
KHOA HOC VA CfiNG NGHE MO
CNM
• Bd phii hgp BNC (BNC Adapters).
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H.2. Hinh dang cua thiet bj Micro Trap VOD/Recorder Data cua Canada
Sau khi do xong, cac k i t qua do se dugc ehuyin tCr may Micro Trap VOD sang may vi tinh bing cap tfn hieu LPT (LPT Communications Cable). Sau dd, thdng qua phin m i m chuyen dung (Micro Trap Advanced Analytical Software), k i t qua do se dugc cac chuyen gia phan tich.
3. Mo phong va k i l m tra trinh tie nd visai bing phin m i m Simshot
Trong phin m i m SimShot, cac lo min eua bai min se 6uegc t h i hien tren binh d l va chCing cd t h i dugc nhap vao chuang trinh nay bing hai each: tCr tpa dp chinh xac cua tCpng lo min theo hp chilu hoac tCp mpt mang Id min (tam giac hoac hinh vudng) khi bilt khoang each giCpa cac lo khoan trong cung mpt hang, giira 2 hang k l nhau, s l Id khoan trong hang va s l hang Id khoan.
Sau khi da ed dugc vj trf cua t i t ca cae lo min trong bai min tiieo dung hd chilu khoan tren binh dd, cac tiidng tin eu t h i cua cac lo min nhu gdc nghieng lo khoan, dudng kfnh lo khoan, chilu sau lo khoan, thdi gian vi sai cua cac kfp dudi Id va tren mat, dilm khdi nl,... dugc cap nhat cho tCrng lo min.
Khi thdng tin cua t i t ca cac lo min da dugc cap nhat va toan bp bai min da dugc d i u ghep hoan ehlnh tren binh d l , chuang trinh cho phep xac djnh dudng biiu diln thdi gian cac nhdm lo min n l g i n nhau nhit va xu t h i djch ehuyin d i t da khi n l cae nhdm nay eung nhu cua toan bp bai min.
N I U hudng djch chuyin cua d i t da n l min trong bai la phu hgp vdi y tudng thilt k l eua ngudi ky su phu trach n l min thi tilp theo se la budc md phdng toan bd qua trinh nhan tin hieu n l cua tCrng Id khoan khi tiln hanh khdi n l bai min va trinh ty n l cua chung (hinh H.3).
H.3. Mo phong trinh tu no visai trong bai no.
4. Mo phdng va k i l m soat mu'c do dap vo*
cua d i t da b i n g phan mem WipFrag
WipFrag la mpt trong s l nhilu ehuang trinh phin mim phan tich va danh gia mCre dp dap vd eua dit da sau n l min bing hinh anh duge SLP dung phi biln hien nay tren t h i gidi. Nd cho phep chi ra nhanh chdng va chinh xac kfeh thudc cd hat va sy phan b l cua ehung trong ding da n l min. TCP dd ed sy dilu ehlnh cac thdng s l n l min d l dat duge mCpc dp dap vd t i i uu cho tCrng dilu kien md eu thi.
H.4. Man hinh the hien menu chinh cue chuong trinh WipFrag.
5. Giam sat c h i n dong n l min b i n g t h i l t bj Minimate Plus
Minimate Plus la mpt may biln nang, glm cd cac diu dd chin dpng (geophones) va bp phan do khuleh dai (microphone). Bd phan dd chin dpng dudi dit d l do sdng chin dpng tCp cac dgt n l min.
Sdng chin dpng se dugc Minimate Plus ghi lai theo 3 true dpc (longitudinal), ngang (transverse) va dCrng (vertical) bdi 3 cam biln chuyen dung (geophone sensor) dugc dat trong thilt bj nay (H.5).
CONG NGHIEP MO SO 4 - 2 0 1 0
CNM KHOA HOC VA CONG NGHE MO
Cac phu kien c i n thiet di kem vdi thilt bj Minimate Plus bao g l m :
• Bp nap dien cho thilt bj Minimate Plus tCr nguln dien thdng thudng;
• Cap n l i thilt bj Minimate vdi may tinh xach tay hoac may in;
• Chuang trinh xu" ly s l lieu BlastWare.
Sau khi do xong, cac k i t qua do se dugc chuyin tCp may Minimate Plus sang may vi tinh bing cap n l i . Sau dd, thdng qua chuang trinh phin m i m chuyen dung BlastMate II, k i t qua do se duac in ra theo cac tieu chuIn hien hanh.
Song dap khong khi
Dao (Jong cCia nen tJat V- Song (JCmg T- Song ngang L- Song doc Bal nnin
H.5. Nguyen tac -do song chan dong do no min cua Minimate Plus.
6. Kit luan va kiln nghj
Viec nghien CCPU, ap dung nhCrng cdng nghe va thilt bj tien tiln nhlm nang cao hieu qua cdng tac khoan-nl min tren md Id thien la mpt viee lam eln thilt eua Viet Nam trong thdi gian tdi. Dilu nay khdng ehl ha gia thanh khoan-nl min, ma cdn mang lai hieu qua cho md Id thien, giam thilu d nhiem tdi mdi trudng va phat triln b i n vCrng.
Cin cd sy hgp tac chat che hon nCpa giCpa cae trydng dai hpc, vien nghien CCPU, Cdng ty Cdng nghiep Hoa chit md va eac doanh nghiep md trong viec dIu tu, chuyin giao cdng nghe va eac thilt bj tren, phuc vu die luc cho cdng tac khoan-nl min ndi rieng va cho nganh khai thac md Id thien ndi chung.I!!l
TAI LIEU THAM KHAO
1. BiJi Hoang Ble, Bui Xuan Nam (2004). He thing djnh vj toan c l u (GPS) va Crng dung cua nd trong khai thac md Id thien. Thdng tin Khoa hpc va cdng nghe md, s l 2. Vien Khoa hpc va cdng nghe md. Ha Ndi. Tr. 7-9.
2. Le Van Quyln, Bui Xuan Nam, Nguyin Dinh An, NhQ' Van Phuc (2006). Kiem tra t i e dp n l va thai gian visai khi n l min tren cac md Id thien bing thiet bj Micro Trap VOD. Tap chi Khoa hpc ky thuat Md-Dja chit, s l chuyen d l nganh KTLT. Trudng Dai hoc Md-Dia chit. Ha Ndi. Tr. 50-52.
3. Nguyen Dinh An, Bui Xuan Nam (2006). Md phdng trinh ty n l min vi sai tren may vi tinh. Tap chf Khoa hpc ky tiiuat Md-Dja chit, s l chuyen de nganh KTLT. Topdng Dai hpc Md-Dja chit. Ha Npi. Tr. 74-75.
4. Bui Xuan Nam, Nguyin Dinh An, Nhii' Van Phue (2006). Danh gia chin dpng do n l min tren md Id thien bing thilt bj Minimate Plus. Tuyln tap bao cao HNKH i l n thCp 17. Trudng Dai hpc Md-Dja chit. Ha Ndi.
5. Kwangmin Kim (2006). Blasting design using fracture toughness and image analysis of the bench face and muckpile. Thesis of Master of Science. Virginia Polytechnic Institute and State University, USA.
Ngu&i bien tap: Ho Sy Giao
jAMiirs^mmitsfimtinmmmMiiui^i
„ncl equipments in the worid having supporting significances to drilling-blasting works,' This paper offers some advanced technologies and equipments using very much in the world to : raising ^the! efficiencies for drilling-blasting lyyprksi in the open pit mines.
RtaE BAO VE CHAM DAT
(Tiep theo trang 38)
giira ap va ddng thCr ty khdng. Vi vay, se phu hgp vdi dilu kien thuc t l cae mang cao ap 6 kV d cae md vung Quang Ninh.d
TA! LIEU THAM KHAO
1. Kim Ngpc Linh. Role bao ve cham d i t mpt pha cd chpn Ipc dung cho cac mang dien md dien ap 6 kV. Tap chf Cdng nghiep Md, s l 5/2009.
Trang 52-54.
Ngu&i bien tap: Dao Dac Tao
results on the design and manufacture of the select guarding relay, discerning one-phase to earth shorting, by phase comparing method between zero-ranking voltage and zero-ranking current in transformer.
CONG NGHIEP MO SO 4 - 2 0 1 0
