Thong tin khoa hoc cong nghe md \ / N G H I E N ClJfU LlTA CHON TO HOP MAY XUC OTO HOP LY KHI KHAI THAC CAC MO LO THIEN DlTdfl tnOC THOAT NU^C TIT CHAY CO DIEU KIEN DIA CHAT PHIJICTAP 7b the open pit[.]
Thong tin khoa hoc cong nghe m d ClJfU LlTA CHON TO HOP MAY XUC - OTO HOP LY KHI KHAI THAC CAC MO LO THIEN DlTdfl tnOC THOAT NU^C TIT CHAY CO DIEU KIEN DIA CHAT PHIJICTAP \/NGHIEN 7b the open pit mines in general and especially to those having TS Ll/U VAN THyC complicated geological conditions, the selection of the proper viin Khoa hoc Cdng nghi Md - Vinacomin truck-excavator complex has a great significance in the mine Biin tip: TS Truang D&c Du production process With the proper complex, the productivity will be ensured, the mining costs will be mduced and maximal resource will be exploited by open pit mining method, contributing to the sustainable development of the mines and the sector as well Nguyen tac lira chgn gdu phu hgp vdi tdi trgng dtd cung dg vdn tdi va D i i vdi cdc md Ig thien khai thde dydi mCre dilu kidn cua md thodt nydc ty chay cd dilu kign dia chit thiiy Ddi vdi mdi dtd dp lyc len nin dydng Idn nhit van (OCTV) vd dieu kidn dia chit edng trinh dyoe chit d i y tai theo thdng s i ky thugt (OCCT) phCrc tgp, ddc bigt cdc md cd ting d i t Trong dd dp lye Idn nhit phdn b i d cdc bdnh ylu, can ddnh gid khd ndng chiu tai cua nd dydi giCra hoac bdnh sau cua xe Ap lye eiia bdnh xe tdc ddng dp lyc eua thilt bi khai thde (hinh 1) tdc ddng len nin dydng dugc xac djnh [1]; Kha ndng chju tdi cua cdc Idp d i t dd dign P^=^.kOlcta' (2) tieh Idm vi^c eiia thilt bj md dygc xdc (^nh {1]; " b.l Trong dd: qbng vgi phin dudi vd phin tren cua trg d&, t/m^; ha- chilu sdu cua try dc, m [2]: Tij cdng thi>c (1) va (4b) xdc dmh dugc [1]: Dilu kipn (5) dugc dp dgng de danh gia kha nang chju tai eua nin dat y l u so vdi dp tyc cua mdy xuc - Lya chpn dung tich gdu xuc; Vci cac md cd dilu ki$n DCCT vd DCTV phuc tap nhu md Thgch Khe, mdy xuc dugc lua chpn theo tai trpng d td phu hgp vci dilu kipn khai thdc vd san lugng md Cdc md dp dgng cdng nghe khai thac vdi gdc nghieng be edng tae ten, be edng tdc se kit c l u gdm mpt hodc mpt so nhdm ting vd tren moi nhdm t i n g cd t h i bo tri cdc mdy xuc Idm vipc theo mdt so sc d l khiu duoi theo hucng (hinh 2) * Trueng hgp 1: Tren mdi tang edng tac bo tri may xiic lam viec theo luong xuc dpc (hinh 2a) Khi mdy xuc tren tang xiic h i t chieu rpng dai khau tucng ung vci khoang cdch djch chuyin ngang cua tuyln cdng tdc nam, s l may xuc ed t h i bo tri tren nhdm ting thij (i) cua be cdng tdc dugc xdc djnh: L .V^, =—iL chiec (6) So mdy xuc c i n thilt d l xdc dat dd tren todn be cdng tdc cua md la: -'^ * /L N, =y^N^, = ^ - ^ chile (7) -: -: ^Jti Trong dd: Lu, LKI- tueng ung la chilu ddi trung binh tuyln cdng tdc va chieu ddi bloc mdy xuc cDa nhdm ting thu i, m; 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Vn- khii lueng dat bdc hdng ndm, m^/n; Ksx- he s l bdc sdn xuit, m^/t; Kig- h§ s l su dgng thci gian ca cua mdy xuc; Kxa- he s l xuc diy gdu; Nca- s l ca lam vipc ndm, TcaE = nV,.,R,L^) (14) thdi gian lam viec ea, gie; Kai- hp s l anh hucng edng nghp qud trinh xCic, Tx- thci Trong dd, dung tich gdu xuc (E) ty Ig thu^n gian chu ky xuc, phut vdi Vn vd Lw, ty Ig nghjch vdi R Nhu vgy dung tich gdu xuc di hodn thdnh Quan hg git>a t h i l t bi xuc bdc - vdn tai khii lugng dat bdc cua md, hay mpt nhdm tang Sy phdi hgp nhjp nhdng giO'a thilt bj xuc bic nhu sau [1]: - vdn tdi cd y nghia quan trgng qud trinh sdn xuit cua md D i i vdi may xuc, chi phi san £.= ^^"^^—T-r-'^' ttOa) xuit phu thupc vdo nang suit cua chting, tir do, can phai xdc djnh hinh thirc, thilt bi v^n tai v4t6 ehCre dilu hdnh san xudt hgp ly DBTB mdy xiic - dtd t i i yu phdi ddm bdo qud trinh vgn hdnh tfi hop dgt hidu qua Idn nhdt, phCi hgp vdi dilu ki$n * Trudng hp'p Tren moi nhdm ting b l tri ky thugt, edng nghg, tinh chit co ly cda dit ii mdy xCic lam viec (hinh 2b) t u cdng thuc (10a), va khoang san tCrng md d l hodn thdnh khoi lugng d i t dd bdc vdi Nxi = - Nang suit ky thudt ciia mdy xCie dygc xdc 2 Dung Dum tich gau t i i thieu d n thilt cua may xuc djnh nhy sau; I xdc dinh: P' £,= ^-^I^ - 120R.N.^.T,.JC,./C,IC„ a" = ' (II) ° " ' ' laifca (15) 1/ Trong dd: qo- tai dtd, t i n ; ng- s i gdu xuc ' Trudng hap 3: Khi tren m i i nhdm tang bo tri diy dtd l^mdy xuc lam vigc (Hinh 2e), tCr edng thCrc (10a) Nang suit thyc te eua mdy xCic dugc xdc djnh J thiy vdi N» = 1, d l hodn san luong nhy sau: I d d bdc, dung tieh gdu eIn thilt dugc xdc V T,.K 60R \'„.L,.K, K K„ (12a)