Ky nipm 88 nam Ngay Bdo chi Cach mang Vipt Nam
KET QUA NGHIEN CUltJ BO SUNG TINH CHAT COf LY OA VA CHAT Ll/tfNG THAN MO VANG DANH
At present, Vang Danh coal mine has been exploited with open pit and underground mining methods at five mining areas. For Increasing the mining efficiency and decreasing the mining costs at these mlmng areas. In 2012, Institute of Mining Science and Technology (IMSAT) had been assigned to carry out the supplementary study on the physio-mechanical properties of rock and the coal quality from Vang Danh coal mine. The results from this study have been introduced in this paper
ThS. LLTU VAN THI/C ThS. DO KIEN CLTONG KS. NGUYEN NAM HAI KS. LE QUANG HOA
Vidn Khoa hoc Cdng nghd Md - Vinacomin
Vai mgc tieu nang cao hipu qua vd giam gia thanh khai thac tpi cac md, thue hipn nhipm vg Tap dodn Cdng nghipp Than-Khodng san Vipt Nam giao, trong nam 2012 Vipn Khpa hpc Cdng nghp Md -Vinaccmin da hpan thdnh vipc nghien cuu b l sung tinh c h i t co \j ciia da, thanh lap ban do nham thach va ban do chit lupng than cQa 3 md, mdt trpng s i dd la md Vang Danh. Bai vilt nay ting hpp k i t qua nghien edu tinh chit CO ly cua dd va chit lupng than md Vang Danh.
Thdi dilm nghien cuu, md than Vang Danh dang khai thac dong thdi Id thien va h i m Id. Cae khai trudng Id thien khai thac tpi 3 khu vuc:
moong V5, moong V4+V5+V6, moong V7, V8.
Khai thac h i m Id dupe thue hipn t^i khu gilng Vang Danh vd khu Canh Ga.
1. c l u t^o dja c h i t khu mo
Khu mc Vang Danh nam d trung tam canh Nam cua dai than Bao Dai, vdi dja t i n g chua than bao g i m cac tram tich hp Trias thing thupng, bac Nori - Rati tang Hdn Gai (Tjn-rhg).
Trong dja ting ed mat cdc lopi da chu y l u , nhu cudi kit, spn kit, cat kit, bpt kit, set k i t vd set than xen kep. Cac via than, x I p theo thu t u t u dudi len, dupe k</ hipu l l n lupt ti> via V.I d i n V.8a, trong dd chi cd cdc via V.4, V.5, V.6, V.7, V.8 va V.8a ed gia trj khai thac. Md ta cdc lopi da va cac via than cd trong (^a t i n g nhu sau:
• San kit: Chilm ty id khdng ddng k l (1,6%) trong dja ting, phan b i chij y l u d tnj via 4, chilu day mdng (0,5 + 2,5)m. Thdnh p h i n chu y l u Id cac hat thach anh, dupe gan k i t blng xi mSng siiic b i n vung, rIt ran chic.
• Cat ket: C l u tpo phdn Idp ddy, ddi noi c l u
t9o k h i i , ke nut phdt triln. Chilu ddy biln dli phdc tap t d (0,5 •i-15)m, ca bipt cd nhifng Idp chilu day d i n 25m, duy tri khd lidn tgc theo ca dudng phudng va hudng d i e , hpt t u mjn d i n thd dupe g i n k i t bang xi mdng silie r i t b i n vij'ng. Trong cac mat e l l , lo^i da ndy chilm t j Id trung binh 37% cpt dja t i n g . Cae Idp cdt k i t thudng n i m trcng khoang gida hai via than.
• Bgt kit: Chilm ty Ip trung binh 35% trong dja ting, thanh p h i n ehij y l u la cae khoang vdt set va cac hat thgch anh hat mjn, dupe g i n kit blng keo siiic ran chic. C l u tao phan Idp day ddi noi dpng khii dac xit. Chilu ddy cac Idp b$t k i t biln d l i r I t phuc tap (0,3 + 20)m va thudng n i m g i n vach trg cac via than.
• Set ket: Chilm ty Ip khoang 11,0% trong dja ting, c l u tao phan Idp mdng la chiJ y l u . Cac idp set k i t thudng n i m sat vach tn.1 cac via than, thudc lopi da nua cdng d i n cung.
» V7a 4: La via than nam t h I p nhlt, cd chilu ddy khdng I n djnh, biln d l i (0,33 + 12,62)m, chilu day tmng binh 3,63m. Trcng via 4 ed mpt phin thupc loai via mdng, vd mpt phin thupc lopi via day x I p vao lopi tuong d i i i n djnh vdi h | s i biln thien V = 57,62%.
Than via 4 chiJ y l u la than cung anh kim, it hon la than cam dnh md, than d phin tn,i via thudng chda nhilu pyrit d i n g sinh.
• Wa S: Via ed chilu ddy khdng I n <^nh, biln d l i (0,65 •!• 30,14)m, chilu ddy trung binh 5,59m, thuie loai via cd chilu day trung binh d i n ddy
• Via 6: Cd chilu day khdng i n djnh, biln dli t u 0,551- 19,61m, taing binh (3,47 + 3,06)m. Via thupc Ippi via day la chij y l u , khde vdi via 4 vd
KHCNM S 6 6/2013 • BIA CO MO
Thdng tin khoa hpc cdng nghp md
via 5, via 6 ed chilu ddy kha day d Cdnh Ga giam d i n v l Trung tam Vang Danh, r l i Ipi tang d i n chilu day cgc bd d phia Odng. Dua vdo dac dilm ding chilu day ed t h i chia via 6 thdnh 2 phin, phia Tdy va phia Ddng, via cd chua t u 1 din 11 Idp kpp, H l u h i t cdc Idp kpp la set k i t chilu day thay d l i (0,01 + 1,54)m, chilu ddy da kep va s i Idp da kep tang dan t u tay sang ddng.
* Wa 7: T i n tai dudi dpng mOt via theo dudng phuong t u Canh Gd sang vang Danh, din glua tuyin IA va tuyin I thi tach via thanh 3 phan via, cac phan via each nhau t u (20 + 40)m.
Via 7 cd chilu ddy khlng I n djnh, biln d l i t u (0,38 + 38,72)m, trung binh (7,28 + 7,52)m.
Thudc loai via day, cd khoang 20% dipn tich thupc loai via dae bipt day. Tren binh do dong chilu ddy phan anh rd quy ludt via ed chilu day giam d i n t u tay sang ddng. Via 7 ed chilu day va muc dd phue tap g i n giing via 5, nhung v l chit lupng lai ed net dpc trung rieng. Td vdeh din trg chat lupng cac Idp than trong via tuong
trung binh (2,75 + 2,85)m. Than via 8a ehd y l u la than cdng, anh kim, c l u tao phdn Idp mong d i n day, thu y l u la than cam va than cung vgn,
2. K i t qua nghien cuu tinh chit co> 1^ cua cac lo^i da
D l xdc dinh b l sung tinh chat co ly ciJa cac loai da ed mat trong dja t i n g thudc cdc khai trudng khai thac Ip thien vd h i m Id md than vang Danh, trong giai doan nghidn edu nay da lly 572 m l u da d l thi nghiem xac dinh tinh chit CO ly ting hpp (06 ehi tieu), s i lupng m l u va khu vuc lly m l u dupe t i n g hpp trong bang 1.
Cdng tac lly m l u , bao gdi va van chuyin v l phdng thi nghidm dupe thue hipn theo TCVN 2338 - 91. Cdc m l u dupe l l y tai cac v l t Ip do khai thac md ra ed kich thudc (200 x 200 x 200mm). Cdng tac thi nghidm m l u dupe thue hipn tai Phdng thi nghipm Dja co Md thupc Vidn Khoa hpe Cdng nghp Md - Vinacomin, vdi 6 chi tidu thi nghipm theo quy djnh hien hanh va tieu chuin TCVN 4202 - 1995. K i t qua thi nghidm Bing 1. Tdng hop s6 luang miu thi nghidm ca ly cua cdc loai dd
Khu vypc khai thic
Him 16 Khai trudng 10
thidn
Vj tri lay mau Mi>c +0, khu Gilng Vdng Danh Mij'c -50, khu Gieng CSnh Ga:
Moong V4, V5, V6, V7 Moong V7, V8 Moong V5
Loai da Sgn kit
11
-
cat ket 64 41 65 41 37
B6t ket 77 27 69 76 22
Sdt ket 4 7 7 17 17
Tong so 145
75 131 145 76 dli ding diu, thudng Id than cdng anh kim phan
Idp td mdng, trung binh d i n ddy
» Via 8: Lp via 8 phan b i tren toan bp khu md theo dudng phuong vd hudng die. Cung nhu via 7, via 8 ed hipn tupng phdn nhanh, tach chap via kha phue tap. Suit t u Canh Ga d i n Tay vang Danh, via 8 t i n tpi dudi dang 2 via: via 8 va via 8a, phin Trung tam Vang Danh, td tuyin IIIC d i n tuyin IMA, via 8 va 8a chap lam mdt.
Chilu day biln d l i t u (0,34 *13,82)m, chilu day trung binh (3,30 + 3,50)m, thupc loai via trung binh d i n ddy Than via 8 thudc lopi than antraxit dnh kim, anh md, ton tpi dudi dang than cung va than cam.
• Via Sa: Phan b i trdn didn tich ciJa khu Cdnh Ga d i n Tdy Vang Danh. Via cd chilu day
tuong d i i I n djnh, thay d l i (0,35 + 11,15)m, Liy miu di cit kit tai moong via 7,8 KHCNM S6 6/2013 * DIA CO MO
Ky nipm 88 nam Ngay Bao chi Cdch mang Viet Nam
xac i^nh cac chi tieu co 1;^ chu y l u ciia cdc loai da cd m#t trong dja t i n g md than Vang Danh dupe t i n g hpp trong bang 2.
Tu cdc k i t qua thi nghipm thu dupe cho thIy, trong cae loai da md Vang Danh, da san k i t cd he s i kien e i trung binh Idn nhlt, f = 10,4; t i l p d i n Id cat k i t cd f = 9,6+9,8; bpt k i t f = 6,9+7,0 nhd nhat la set k i t f = 3,6 +4,5.
3. K i t qua nghien cihi c h i t luwng than cac khai trudng Id thidn cua md khai thdc eae Id via va tpn thu cac trg bao vp, khai thac h i m Id dupe thue hidn tai cac khu vuc: via 4, 5, khu Tay Vang Danh; via 4, 5, 6, 7 khu Canh Ga II; via 6, 7, 8, 8a khu glua Canh Ga I; via 7, 8a khu glua vang Danh I; via 6 , 7 , 8 khu giQ'a Vang Danh II.
cac mau than dupe l l y tore tiep tai eae guong than, t u vach sang trg va tuy thupc vap cau tpc cOa via than tai dilm lly m l u quylt (Inh s i mau cIn lly mang tinh chit dpi dipn thep TCVN 1693:1995;
TCVN 5578-1991; TCVN 5579-1991.
Trong mpt via, mdi khpanh, hope dipn khai thdc trong ky k l hoach, l l y t d 3 d i n 5 m l u vi phan theo tung t i n g khai thac hoac tai cac guong id theo mdc cac. O i l vdi cae via khai thdc
Id thien, tOy thupc vao Id via trdn cdc t i n g khai thac theo dudng phuang vdi khoang each 30 d i n 50m l l y 1 m l u vi phdn.
Trong Id, vj tri cac d i l m l l y m l u dupe xdc djnh bang ^ a ban vd thudc day t u cdc dilm m l c do cdng trinh trong eae dudng Id da thi cdng, uu tien s d dgng eae d i l m m l c do d g i n vj tri lly m l u , s i hipu rd rang. Tif cac s i lipu do dupe, dua vj tri tea dp d i l m l l y m l u Idn ban do. Vdi mdi mpt d i l m mau vi phdn via, t i l n hdnh lay 01 m l u vach va 01 m l u trg via than. D l i vdi^;ac vj tri khdng t i l p can dupe vdeh, trg, cae Id dpc via, t i l n hdnh dac eijp d l l l y mau.
Trpng giai dpan nghien edu nay, da tiln hanh l l y m l u tai tat ca cac via dang khai thac, vdi tong s i m l g thi nghipm, bao g i m : 194 m|g da vach, tai; 423 mau da kpp va 520 m l u than.
Cae m l u than dupe thi nghipm vdi 7 ehi tieu (bang 3) tai Phdng thi nghidm Mdi trudng va Khoang san Vien Khoa hpc Cdng nghe Md - Vinacomin. K i t qua thi nghipm xdc djnh chat lupng cae via than vd tinh c h i t da vdeh da tm, da kpp tai eae khu vuc khai thac cua md than Vang Danh cho thIy than ciJa md Vang Danh cd dp trp thIp, AHH = (21,33 + 28,39)%, nhiet lupng Bing 2. Ting hap kit qui
Khu VU'C
Moong via 5
Moong via 4 , 5 , 6
Moong via 7 , 8
Khu gieng v a n g Danh
Khu Cdnh Gd
Loaidi
Cdt ket Bdt k i t Sdt k i t
cat kit Bdt kit
Sdt ket San k i t c a t ket Bdt k i t Sdt k i t
cat kit
BOt k i t Sdt k i t Cdt k i t BOt k i t Sdt k i t
S d / u o n g mau
37 22 17 64 77 4 11 41 76 17 65 69 7 41 27 7
thi nghidm xic dinh tinh chitca ty dc loai di md Ving Danh ChiSeucaly
W,(%) 0,223 0,617 0,782 0.169 0,439 0,812 0,137 0,189 0,436 0,731 0,15 0,433 0,592 0,228 0,43 0,625
V, g/crh' 2,677 2,688 2,608 2,676 2,693 2,608 2,631 2,686 2,696 2,609 2,674 2,698 2,605 2,672 2,704 2,58
y,g/brr)' 2,629 2,640 2,548 2,628 2,639 2,545 2,669 2,629 2,641 2,549 2,629 2,641 2,648 2,628 2,640 2,549
ak,kGA:m^
157,718 112,905 68,018 169,41 109,842
60,475 150,237 162,738 106,812 62,417 164,662 106,639 62,669 155,11 94,36 64,933
On, kG/arf' 967,468 678,484 387,561 983,409 698,971 421,6 1037,56 989,525 698,634 428,989 966,022 686,943 362,645 963,93 695,841
453,06 f 9,676 6,785 3,876 9,834 6,99 4,22 10,38 9,895 6,986 4,29 9,660 6,869 3,626 9,639 6,958 4,531
CkGkrrf 247,78 178,01 103,17 251,538
182,38 107,23 255,812 246,477 181,146 109,39 246,07 178,333 92,405 246,12 184,56 115,1
<P,dd 32 31 26 33 31 27 35 33 31 27 32 33 25 32 31 26
KHCNM Sd 6/2013 * D|A CO MO
Thing tin khoa hpc cdng nghe md
my
Bing 3. Ting hpp cdc chl tidu kf thudt ciia than md Vdng Danh TT
1 2 3 4 6 6 7 S 9 10 11 12 13 14 16 16
Khuv^
V4d6c V4(2) V5,TVD V4, CG II V5, CG II V6, CG 11 V7, CG II V7, GVD-K 1 va, GVD-K 1 V6, GVD-K II V7 GVD-K II V8, GVD-K II V6, GCG - K 1 V7, GCG - K 1 ve, GCG - K 1 V8A, GCG - K 1 G/a trj nhd nhat
Gia tri l&n nhat Gli trj trung binh 17
18 19 20 21
V5 +270 V7+315 V4 (4-6-6) V5 (4-5-6) V6 (4-5-6) Gia hi nho nhat Gia tri Irm nhat Gia tri trung binh
Cdc chl tieu kfthu$tc6a than ytb,
g/tirf 1,617 1,602 1,579 1,583 1,609 1,621 1,586 1,598 1,575 1,619 1,610 1,607 1,604 1,693 1,590 1,694 ),575 1,621 1,599 1,598 1,691 1,604 1.608 1,578 f,57S 1,608 1,596
AkTS,
%
23,16 21.61 20,91 22,17 25,13 22,57 19,23 21,25 21,20 20,46 20,17 19,75 21,89 18,67 22,65 24,75
<8,67 25,»3 2<,60 22,72 20.88 21,17 21,65 19,94
•19,94 22,72 21,27
AkHH,
%
25,44 26.48 25,31 24,92 2790 24,41 21,33 26,96 22,66 21,38 22,49 24,77 23,46 21.66 25,94 28,39 21,33 28,39 24,59 26.82 23,46 22,41 23,32 21,63 2<,63 25,82 23,33
Wlb,
%
4,26 4.19 4,81 4,28 4,79 4,94 4,79 3,62 4,56 5,03 4,80 4,74 4,35 4,59 4,14 4,06 3,52 5,03 4,49 4,20 4,20 4,04 4,07 4,19 4,04 4,20 4,14
Vk,
%
3,65 3,00 3,50 3,42 3,58 3,94 3,84 2,63 3,31 3,84 3,39 3,35 4,60 4,38 3,89 3,91 2,53 4,60 3,63 4,60 4,59 3,72 4,11 4,26 3,72 4,60 4,26
Stb,
%
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 50 70 49 45 19 44 18 80 34 17 24 18 64 18 09 14
»,0S7 1,799 1,352 1,35 1,21 0,97 0,90 1,01 0,903 1,347 1,088
Ptb, ppm 0,005 0,007 0,007 0,010 0,016 0,016 0,013 0,010 0,011 0,033 0,016 0,015 0,013 0,013 0,011 0,011 0,005 0,033 0,0)3 0,014 0,015 0,012 0,012 0,014 0,0)2 0,0(5 0,0)3
Qtb, Kcal 6696 6221 6786 6451 6293 6153 6565 6672 6243 6166 6262 6461 5957 6775 6621 6443 5696 6786 6353 6075 6248 5774 5978 6464 5774 6464 6108
Bikfp Y, 1,982 2,024 1.994 2,064 2,134 1,966 1,994 1,933 2,083 2,062 2,064 2,111 1,953 1,993 2,006 2,051 ),933 2,134 2,025 2,050 2,144 1,986 2,036 2,011 ),985 2,144 2,045
Ak,
%
76,69 74,39 77,95 68,73 81,53 80,46 78,85 66,36 78,85 79,25 77,26 79,82 76,02 79,25 77,86 76.65 66,35 8),53 76,8) 79,20 81,62 76,25 76.61 80,21 76,25 8),62 78,78
Bi Vich, trv y, g/crr?
2,610 2,620 2,550 2,580 2,630 2,620 2,580 2,530 2,620 2,630 2,610 2,630 2,635 2.590 2,620 2,610 2,530 2,635 2,604 2,633 2,614 2,626 2,621 2,630 2,6)4 2,633 2,625
Ak,
%
82,15 83,52 79,95 78,47 82,20 81,86 78,16 79,93 81,80 81,06 80,06 81,77 82,26 76.62 83,76 80,18 76,62 83,76 80,86 82,33 79,16 78,25 81,08 82,75 78,25 82,75 80,7)
kha cao, Q = (5697 + 6786) kcal/kg. Vipc xdc djnh cac chi tieu ky thudt ciia than cung nhu da vdeh, da tnj la CO sd giiip Cdng ty xay dung cae chi tieu kinh t l - ky thupt trong nhung nam sap tdi.
K i t luan
1) Cac k i t qua nghien edu b i sung tinh chit CO 1;^ da vd chit lupng cua than md Vang Danh da dupe Ting Gidm d i e Tap doan Cdng nghipp Than-Khodng san Vidt Nam phe duypt. Day la CO sd khoa hpe d l Cdng ty CP than Vdng Danh - Vinacpmin triln khai ap dgng tinh toan cae chi
tieu ky thuat-kinh t l trong nam 2013 + 2014.
2) Trong qua trinh md rdng vd khai thac xuing sau cac khai trudng Ip thien va h i m Id, muc dp ndt ne trong khii dd cd xu hudng giam, dan d i n gia tang v l dd b i n vd trpng lupng t h i tich eua nguydn khii. Do vay, d l cdng tac khoan n i min b i c xuc van chuyin trong qua trinh khai thac Id thien vd dao ching Id phCi hpp vdi thue t l khai thdc hang nam ciJa md, cIn tiln hdnh nghien cuu xac (^nh b i sung tinh chit co ly va chit lupng than, chp phep nang cao hipu qua khai thac va giam gia thanh./.
KHCNM S 6 6/2013 * 8|A CO MO
