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KHOA HOC VA CfiNG NGHE MO TLT DONG HOA CONG TAC D U BAO DiCH CHUV€N BI€'N DANG TH€0 LV THUVCT SflLS ThS NGUYEN QU6C LONG, TS VUONG TRONG KHA ThS LE VAN CANH - Tru&ng Dai hoc Mo-Dja chit r dc phuang phap giai ttch dij bao djch chuyin biln dgng b l mat anh hudng cua qua trinh khai thae him Id thudng ed mdt khli Iugng tinh todn dd so, viec ily eac gia trj dup'c tren ban ve thudng ed sai s l Idn Vi vay viee dp dgng cdng nghe tin hge xd ly cac bai toan dang ed y nghTa quan trgng, khde phgc khdi lug'ng tinh toan rit Idn trudc day va nang cao chfnh xac Bai bao gidi thieu phuang phap du' bao Bals va phdn mim dg" bao duge lap dua tren thuat toan : K ^ Ly thuydt Bals 2,4 1,6 ^i^ 0,8 H Ham anh hudng cua Bals (2) Trong dd: N - S l vOng vdi ban kinh n; M - Sd phdn vOng (hinh quat), S,'^ - Dien tich da khai thdc cua d I; S, - Dipn tich tdng cgng cua d I CdNG NGHIEP MO Sd - • 3,2 10 20 30 40 50 60 70 80 90 , L;? thuyit cua Bals dua tren dinh luat van vat hip dan eua Newton, Bals da phat triln phuang phap cua Keinhorst [1] bdng viec tang sd lup'ng vOng tac ddng anh hudng khai thae ddn din hdm anh hudng phuc tap han Mpt nhdng uu dilm eua ly thuyit Bals la kha nang tao mdt dd giai hinh trdn dan gian eho phep tinh ICin cho cac dilm d cac vj tri khac met each nhanh chdng Viec du" bao dupe bit ddu bdng vide xdc djnh gdc gidi han cua anh hudng ^g, tit nhdt td kit qua quan trac anh hudng khai thdc Tilp theo ta ve dd thj ham anh hudng cua Bals K=(2.^+sin20 [1] gidi han [0, y , sau dd chia Kg mdt s l lupng phdn blng (thdng thudng la 5) va xac djnh cac gdc tuang ung ^i (hinh H.1) Cac gdc dng vdi viing 5, cho phep xac dinh ban kinh cua vung anh hudng r,: ri=(H.tgy (1) Ta tao d l giai tren gily can ky thuat cd ty lp gidng nhu ty le eua ban dd thilt k l khai thae (hinh H.2) Mdi d eua gian d l gay nen mdt dp lun len diem P gidng Ta tinh lun cua dilm theo edng thuc dudi day: N.M";t;[sp 4,0 H.2 Gian de xic dii J^^ KHOA HOC VA C O N G NGHE MO Ly t h u y i t cua Bals cd t h i d u a c h i l u n h u sau: Chia toan bg vung anh h u d n g vdng trdn d i n g tam tao nen mgt hinh trdn va hinh vanh khuyen (nam phan vung anh h u d n g ) , ban kinh cua cac vdng trdn d u g c tlnh t u cdng thdc (1) Mdi phan vung tac dgng tdi lun cua d i l m P tren mat ddt la nhu va b l n g 20 % lun cue dai cua diem P Dp lun cua d u g c tinh theo cdng thuc: Tip=a.g.X , | ^ , (3) H.4 Menu cua phin mem Trong d6: S, - Dien tich cac vung anh h u d n g ; S,'' Dien tich da khai thae cac vung anh h u d n g > Tinh ban kinh anh hudng r,: Xay du'ng m o d u l e d u bao 2.1 Ngdn ngO' viet chwang trinh Module dugc xay dung b l n g ngdn ngij" Visual C++, la mot ngdn ngu lap trinh hudng ddi tugng biln, Objecf\RX la mdt t h u vien Idp C++, nd d u g c s d dgng d l phat triln phan mdm dua tren n i n Autocad 2.2 Thuat giai J^tif j / Bat dau i i ' je [^ I N h j p Jp H ^ H.S Khai bao cac tham so ' I Tinh!;, (ii^H-5) Tmh Tj 4' TinhSi.Sj' 1 Trnhl,,,.!, K ^ ' t V§ cac bieu In bang KQ , J jr Ketthuc H.S Sa thuit giai cua chuang trinh Trong sa dd thuat giai d tren H.3, viec tinh S/'la phdc tap nhdt, cd the hieu la xac dinh phan dien tich hgp bdi cdc d u d n g tron va da giac, chi tiet thuat giai tinh dipn tich da d u g c tac gia gidi thieu [2] 2.3 Tinh nang cua phan mem Phdn m i m d u g c tich hgp d u d i dang mpt menu cua phdn m i m Autocad co cac chuc nang chinh dudi day (H 4) Cac tham s l r, d u g c luu vao bp n h d d l Iam tham sd d i u vao xac djnh dien tich cac phan viing anh h u d n g