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Thong tin khoa hpc cong nghe mo SIX CAN THIET PHAI HOAN THIEN CAC THONG SO HE THONG KHAI THAC PHU HOP VQfl DONG BO THIET BI CO CONG SUAT LQfN • • • d cac mo than id thien At present, at the big open p[.]
Thong tin khoa hpc cong nghe m o SIX CAN THIET PHAI HOAN THIEN CAC THONG SO HE THONG KHAI THAC PHU HOP VQfl DONG BO THIET BI CO CONG SUAT LQfN • • • d cac mo than id thien At present, at the big open pit coal mines belonging to ThS Ll/U VAN THirC VINACOMIN, many mining equipment with high capacity KS DtfONG TRUNG TAM such as drilling machines, excavators, trucks have been KS DOAN VAN THANH invested and supplied to increase mining technical and KS VU DINH TRl/dNG economic index and productivity The paper refers to the KS LE BA PHLTC necessity for determining the parameters in the mining V7en Khoa hpc Cdng nghe Md - TKV system at open pit coal mines suitable to the synchronous high capacity mining equipment Dat van de Hien nay, theo quy hoach phat trien nganh den nam 2015 CO xet trien vpng den nam 2025, cac md than Ip thien Idn eCia Viet Nam dang cang khai thac xudng sau, bien gidi tren mat dtfdc md rpng Mpt sd cac md vung Hdn Gai nhif: Nui Beo (-135), Ha Tu (-190), Xf nghiep than 917 (-170) se ket thuc khai thac Ip thien vao nam 2015 Cac md nhtf: Cao Sdn (-350), Coc Sau (-375), Deo Nai (345), Tay Nam Da Mai (-200) CO thdi gian tdn tai ttf 15^40 nam; cac md Na Dtfdng (-6), Khanh Hoa (-300) c6 thdi gian tdn tai ttf 40-^50 nam Do yeu cau san Itfdng than cang Idn, cac md boat dpng theo nhu cau thj trtfdng, nen tien dp bdc da't deu khong phu hpp theo thiet ke da dtfdc phe duyet Dieu do, lam pha vd trinh ttf phat trien dn djnh va ben vtfng Thiet bj khai thac ciia cac md hien hau het la cac loai thiet bj eo cong sua't nhd, nhieu loai da het khau hao va da qua nhieu lan trung dai tu Mat khac, nhu cau than ciia thj trtfdng cang tang, ddi hdi ctfdng 66 khai thac rat Idn, nhtf vay, cac thiet bj dang stf dung b cac md than Ip thien hien se khong dap tfng dtfdc ke hoach san Itfdng TKVdera thdi gian mtfa trung binh thang/nam Dja cha't kien tao eiia eac md phtfc tap, gdm nhieu phay pha, dtft gay hien thie't than Ddi vdi cac md than Ip thien Idn thupc TKV, cdng nghe khai thac dtfdc cac md stf dung theo thiet ke la he thdng khai thac dpc mpt hoac hai bd cong tac, dat da khau theo Idp xien ttf 14-5-16° Nhtfng nam qua, nhieu ly khach quan nhtf: Vdn dau ttf han che, gia ban than npi dja chtfa hdp ly nen cac md phai khai thac vdi mat tang thu hep, CO nhtfng ndi bj chap tang, goc bd cong tac trung binh ttf 23^25° Dac diem ttf nhien, trang cong nghe va bj khai thac tai cac md Ip thien Idn Viet Nam a Dac diem tif nhien Cac md than Ip thien Idn nhtf Cao Sdn, Cpc Sau, Deo Nai, Tay Nam Da Mai, Ha Tu, Niii Beo, Xi nghiep than 917, Na Dtfdng, Khanh Hoa ed dieu kien dja chat thupc loai phtfc tap Nham thach cac md gdm chCi yeu cat ket, bpt ket, eupi, san ket ed he sd kien ed Idn, f = 8-^14, phai lam tdi bang khoan nd trtfdc xuc bdc Rieng md than Na Dtfdng da't da thupc loai Neogen, phong hoa manh, dp kien ed tha'p, nhtfng da't da c6 phan set de trtfdng nd, bam dinh gap ntfdc Tuy vay, dat da van phai lam tdi sd bp bang phtfdng phap khoan nd trtfdc tien hanh xuc bdc Cac md deu cd Itfu Itfdng ntfdc ngam va ntfdc mtfa ldn, KHCNM SO 1+2/2010* CNKT Lp THIEN b Cong nghe va thiet bj khai thac Hien nay, day chuyen cong nghe khai thac phd bien d cac md bao gdm: * Khau lam tdi sd bp: May khoan xoay cau CBlU-250 {^ = 250 mm) va may khoan thu^ Itfcc6(t)= 127-^250 mm * Khau xuc bdc: May xiic c6 dung tfch ttf 5^12 m^ phuc vu cho cong tac xudng sau la cac may xiic TLGN c6 dung ti'ch gau ttf 1,8-^3,5m^ Thong tin khoa hpc cong nghe mo * Khau van tai: Oto van chuyen dat da c6 tai trpng ttf 55^96 tan; 6t6 van chuyen than CO tai trpng ttf 27-^40 tan hoac bang lien hdp oto va bang tai * Khau thai da: Ket hdp to va may gat cong sua't ttf 180^320 HP Hien nay, eac td hdp thiet bj cua cac md bao gdm nhieu loai ciia eac hang khac nhau, vdi dung tfch gau xiic, tai trpng 6t6, dtfdng kfnh Id khoan, cdng sua't may va thong sd lam viec khac Trong do, eac thong sd cua HTKT ehl phii hdp vdi td hpp OBTB cd cong sua't nhd nha't djnh Vi vay, vdi cung cac thong sd HTKT, nhieu loai thiet bj c6 cac thdng sd lam viec khac se lam anh htfdng tdi nang sua't va hieu qua lam viec eiia OBTB ed e6ng sua't Idn Cac thdng ed ban ciia cac md than Ip thien Idn the hien tren bang Phtfdng htfdng, ctfdng dp khai thac va cong nghe ap dung d cac md than Ip thien Idn Viet Nam Hien tai va nhtfng nam tdi, cac md deu md rpng bien gidi ca chieu rpng va chieu sau, san Itfdng than khai thac va khdi Itfpng dat boe Idn (bang 2), nen viec Itfa chpn HTKT theo Idp dtfng la phii hpp oac diem va trinh ttf kha'u da't da ap dung HTKT kha'u theo Idp dtfng bd md chia nhieu nhdm tang: Cong tac bdc da dtfpc tien hanh ddng thdi tren cac nhdm tang, mdi nhdm tang, cong tac boe da tien hanh ttf tren xudng dtfdi Cac nhdm tang boat dpng dpc lap vdi trat ttf va ctfdng 66 bdc da't cac nhom tang dam bao theo tfnh toan Viec dao sau day md ehl phu thupc vao tien dp boe dat ciia nhom tang giap via than Cung vdi cong nghe kha'u theo Idp dtfng d cac md Ip thien Idn, stf dung phu hdp nha't la ed cau ddng bp may xuc - 6t6 vdi dac diem: - Cd ca'u stf dung cho ta't ca eac loai da't da vdi dp ctfng khac nhau; boat dpng chieu sau nang tai ttf 200+250m - Khoang each van tai thi'ch hpp ddi vdi da't da la ttf 1^3 km va than ttf 2^4 km ddi vdi than - Nhanh chdng dtfa md vao san xua't d i dang, nang cao san Itfdng md ctfdng 66 xudng sau Idn - Tfnh cd dpng cao, phii hdp vdi dja hinhi ddi niii dtfdi moong sau Khi tang cong sua't may xuc, ddi hdi cdng sua't 6t6 cung phai tang theo de dam bao tfnh ddng bp Khi xudng sau, chieu cao nang tai Idn, d nhieu doan Itfdn vdng viec thay the 6t6 khung ctfng bang oto khung mem la mpt giai phap hdp ly nham tang hieu qua stf dung xe Hoan thien cac thong so HTKT phu hdp vdi ddng bp thie't bj co cong sua't ldn Trong nhtfng nam gan day, mpt sd md nhtf: Cao Sdn, Cpc Sau, Deo Nai da tien hanh dau ttf mpt sd loai thiet bj ed cong sua't Idn nhtf: may xuc ed dung tfch gau ttf 8-^12 m^ oto KHCNM S 1+2/2010* CNKT LO T H I £ N tai trpng ttf 55H-96 tan, may khoan d = 230^280mm Song, theo danh gia thtfc te, cac loai thiet bi chtfa dat dtfpc nang suat theo dinh mtfc cua Tap doan TKV, chiing dang hoat dpng cung cac thong sd he thdng khai thac (HTKT) cua cac thiet bj c6 cong sua't nhd Do vay, chiing khong phat huy het kha nang lam viec mang lai hieu qua kinh te cho md De dam bao dap tfng dtfpc ctfdng 66 khai thac thdi gian tdi, cac md phai tien hanh dau ttf nhtfng loai thiet bj hien dai, cd dpng va nang sua't cao (cong sua't Idn) dan thay the cac thiet bj c6ng sua't nhd da het kha'u hao De dap tfng nhu cau san Itfdng va phu hdp vdi dieu kien khai thac eiia cac md than Ip thien Idn ciia ntfdc ta, viec Itfa chpn hdp ly DBTB cho cac md phai dap tfng dtfdc cac yeu cau sau: Thi'ch hpp vdi tfnh cha't cd ly ciia nham thach d ttfng khau cdng nghe: Khoan, xiic, van tai; phu hdp vdi he thdng khai thac kha'u theo Idp dtfng, dam bao thtfc hien san Itfdng theo ke hoach; giam gia khai thac DBTB dtfdc Itfa chpn phu hdp vdi dieu kien cac md than Ip thien Idn Viet Nam (bang 3) De dam bao cho eac thiet bj khai thac cong sua't Idn boat dpng dat nang suat cao va dam bao an toan qua trinh san xua't, can thiet phai Itfa chpn cac thong sd HTKT phu hdp vdi DBTB c6 cong suat Idn va dtfdc ti'nh toan theo cac cong thtfc sau: Thong tin khoa hpc cong nghe m o * Chieu cao tang: Theo dieu kien thiet bi stf dung va tfnh chat cd ly ciia da't da, chieu cao tang c6 the dtfdc xac djnh theo cong thtfc: /2 = 0,7.a ,m sinor.siriyff \K^.T]\(^ + i').^\n{a-P) (1) Trong dd: a = 0,8.(Rx-HRd): Chieu rpng ddng da sau nd min, m; R^, R^: Ban kfnh xiic va dd cCia may xuc, m; K^: He sd nd rdi eCia dat da nd min; 77'=PF//z-0,55-f-0,70; 77"=/,/^r = 0,75^0,85 vdi W la dtfdng khang chan tang, m; b la khoang each gitfa cac hang Id khoan, m; a la khoang each gitfa cac Id khoan, m; a, p: Goc nghieng stfdn tang va stfdn ddng da nd min, 66 * Chieu rpng mat tang cong tac: Trong trtfdng hpp tdng quat, chieu rpng mat tang cong tac tdi thieu dtfdc tfnh theo bieu thtfc sau: B™„ = A + X + C2+T + Ci-iZ, m (2) Trong do: A - Chieu rpng dai kha'u, m; X - Chieu rpng phan ngoai ciia ddng da nd min, m; C2 - Khoang each an toan tfnh ttf mep dtfdi ddng da den true dtfdng van tai, m; T Chieu rpng dai van tai, m; C,Khoang each an toan tfnh ttf true dtfdng van tai den mep sut 16 ttf nhien eiia tang, m; Z Chieu rpng dai an toan, m (Z = h.(ctgp - etga), m; p - Goc dn dinh eiia da't da tang, 66; a - Goc nghieng stfdn tang, 66) * Chieu rpng dai kha'u: - Chieu rpng dai khau tfnh theo ban kfnh xiic ciia may xuc A = (1,5^1,7).R^ (3) - Chieu rpng dai khau xac djnh theo dieu kien nd tfnh theo cong thtfc sau: A = W + (n-1).b, m(4) Trong do: W- Dtfdng khang chan tang, m; n - Sd hang min; b - Khoang each gitfa eac hang min, m; R^t - Ban kfnh xuc eiia may tren mtfc dat may, m * Chieu dai block xuc dtfdc xac djnh theo cong thtfc: Q '~ AJi /• m (5) Trong do: Q^ng- Nang suat eiia may xiic, m^/ngay, Tng- Sd may xiic xuc het ddng da nd min, Tng = 12-^15 ngay, f- He sd dtf trtf nang sua't may xiic, f = 1,2 Nang sua't eiia mpt may xiic phu thupc chii yeu vao dung tfch gau xuc, loai oto phuc vu, cha't Itfdng ddng da nd min, trinh 66 tay nghe eiia cong nhan van hanh thiet bj va cong tac td chtfc lao dpng ea Quan he gitfa L^ va dung tich gau xiic dtfpc the hien tren hinh - Khi ta't ca cac tang tren bd cong tac deu la tang cong tac va stf dung dai khau thdng tang, thi chieu rpng cCia bd la Idn nhat va goc nghieng bd cong tac la nhd nhat, xac 6\nh nhtf sau: q\ = arcctg^ n,.h 66 (6) - Khi stf dung dai kha'u cut, thi chieu rpng mat tang cong tac Bn,in thu hep hdn so vdi khau thong tang Trong trtfdng hdp goe nghieng bd cdng tac dtfpc nang len dang ke so vdi kha'u thong tang va dtfdc xac djnh nhtf sau: U-i)B^+n,}i.ctgpc (P2 = arcctg n,Ji 66 (7) Hien nay, hau het cac md Ip thien Idn d ntfdc ta va tren the gidi deu ap dung cong nghe khai thac vdi goc ddc bd cong tac Idn stf dung he thdng khai thac doe, bd md chia nhieu nhom tang, nhdm tien hanh khau dudi hoac kha'u lan Itfdt ttf tren xudng dtfdi Vdi sd 66 he thdng khai thac dpc, bd md chia nhieu nhdm tang, stf dung hinh thtfc kha'u dudi nhdm gdc nghieng bd cong tac trtfdng hdp la: n,}i q}„ = arctgi k.B^ Hn.-\-k) Hinh Bieu dd chieu dai ludng xuc phy thudc vao dung tich may xuc * Gdc nghieng bd cong tac: KHCNM S6 1+2/2010* CNKT LO THIEN ( ) - SI c O t - CM ii CO 8+10 than 8+10 •i-E O'fl 0 0 c CM 0 CM 0 CM en CO 8 00 1^ in c-} CO 0 CD 0 CM CO (O 0 U) 0 0 10581 CO 0 2081 CO 0 tj) CO o> 2500 500 0 o> 2500 500 0 in 0 CM CM 0 CM 0 C7) in p) 00 0 0 in 1^ r> in CO CO ã» 1^ IJCvl 0 CO 0 CO 0 0 00 CM en a 0 CO 0 u> CO 0 Oi '" 0 0 0 CM n C5 CM 0 in CJ> 0 m CO CM c^i in CM ^i n (N x~ m CJ) in T— ^ 0 T— S s CO CM B in in Cvl CO GO CO 0 in CM 0 in CM 0 in CM 0 in Cvl 0 in CM 0 if) Cvl 0 in CM in 1^ CO CM in CM 0 0 CO 0 CO 0 00 0 CO ^— CO CO 0 CO t— CO 0 CD m CO 0 in CO 0 (O CO 0 in CO 0 in CO 0 in CO 0 in C) 0 0 0 • Q ^ T— ^ • < T - 0 0 1^ CM 0 Ci f^ Cvl 0 1^ CM 0 t^ IM 0 C7) 0 CM ^ CM CO •§ 01+8 in ZZ+OZ + 00 (N 65+70 Vi vo 60+65 13+15 o in 1- •a vt u 0- tn 13+15 m in b'Vo 13+15 vo Vi 30+40 in 13+15 Thiet ke Cao Son Thuc te' X 25+30 Thid't kd' •10 o 65+70 12+15 12+15 25+40 30+35 Thuc te' Thid't kd' Nui Bdo Thuc td' m 0 iii'