Thong tin khoa hpc cong nghe m o
HIEN TRANG VA GIAI PHAP Tl THUAT NHAM NANG CAO TOC DO OAO LO
For increasing the driving speed at pres ^i t situation, it is necessary to pay much atteimw to the fundamental technical issues at each op m ition of the driving link. The paper refers to the I m ' technical demands such as proper drilling-blast £7 activities, explosive and detonator utilization. i
TS. PHAM MINH DU-C KS. TAO VAN NGAN
KS. NGUYEN VAN C6NG
Vi^n Khoa hgc Cdng ngh$ Md - Vinacomin
Dilu kien dja chit, nhit Id vy cdng tdc ddo 16 tgi cdc cdc dge tinh ky thugt eua d i t dd dudng 16 dpc via than, h i u h i t vung md Quang Ninh r i t phCpc cdc rrit' than him Id thudc vung tgp, cdc via than h i u h i t d i u than C uang Ninh tCp Mgo Khd khdng I n djnh v l chilu day vd d i n K i e Chdm d i u da dugc gdc die; cdc guang Id thi cdng tran(j )j logi mdy ndy. Tgi mpt ngdy cdng sau vd xa ndn vipc di s l md may combai da phdt huy Igi, van chuyin, thong gi6, thodt due e tdc dyng. t i c dp ddo 16 nudc... ngdy cdng ggp nhilu dgt hi?u qua cao, tuang duang khd khan. Trang thilt bj thi cdng vdi \6c dp tidn tiln tgi cdc nudc d i u tu chua ding bp vd khdng D O I J A U . Tuy nhidn, d nhilu tuang xCpng vdi dge dilm ky md, Jo d i l u kipn dja ky thugt.
thugt cua dd. Dpi ngu cong nhdn mac du da dugc ddo tgo, cd su-c khoe, dugc quan tdm v l vat chat vd tinh thin nhung sy gan bd vdi nghi cdn nhilu hgn e h l v.v...[11], [12]. Dd Id mpt s l nguydn nhdn ca ban Idm cho d i n nay t i c dp ddo Id chua cao.
Gin 10 nam trude, Tgp dodn Cdng nghiep Than- Khodng san Viet Nam da d i u tu 17 chile may combai phyc
tinii nang ky thugt cua may khdng phu hgp, ndn d i n nay, eh cdn vdi ba may hogt dpng nh I ^g t i e dp ddo 16 khong cao.
hien nay, vipc ddo 16 trong mci / i n chu y l u su' dyng bien pha 3 truyin thing Id khoan n l mini Cac cdng dogn chu y l u trcrg ddo Id bang phuang phap khcen n l min la: khoan n l , ble xLcl van chuyin. ching tgm, ett^ ng c l djnh vd mpt s l cong ,So ngu'd[
Thdi gian
s l ngudi, Thdi gian \
tdc phy trg khde nhu thodt nudc, thdng gio, dgt ray tgm, n i i ddi m6n6ray hay dudng ray tgm trong khi thi e6ng. Bing viee rut ngin thdi gian tCpng e6ng dogn tgo tiln d l rut ngin thdi gian chu ky vd d6 Id ca sd d l tang t i c dp dao 16.
Thi cong ddo ching 16 bing khoan n l min kh6ng phai Id kh6ng t h i ndng eao t i c dp vd ndng suit ddo cdc dudng 16.
V i n d l dgt ra Id phai xem xet mpt each can ban sy dong bp thilt bj, t l chu'c thi cong vd cdc van de ky thuat ca ban {tir hp chilu, tinh ndng cua cdc thdnh phin trong cong doan d i n vide SU' dyng c6 hidu qua thulc n l , vgt lieu n l , vgt lieu vd kit c i u ching..).
Cac cong dogn trong chu ky dao 16 bing khoan n l min Id S l ngudiAhIng
Thdi gian^cl djnh
Kit thuci chu ky
S<ydd2
KHCNM S6 3/2012* CNKT HAM LO
mpt t l hgp ede ccng viec n i i tilp vd lidn tilp vdi nhau (sg d l
1). Vide k i t hgp cdc c6ng vide CO t h i thi e6ng ding thdi trong chu ky d6i hdi sy t l chiPC san xuit vd t l chu'c lao ddng khoa hpe (sa d l 2).
T l chLPC lao ddng hdi hod trong vd ngodi guang t i t cd t h i nang cao t i c dd vd ndng suit lao dpng ddp Id Idn r i t cao, nhung chf d i n mpt mCpc 66 nhit djnh, sau dd phai cd nhO-ng thay d i i v l ky thudt vd thilt bj.
/. Cong tac khoan n6 min Cdng tdc khoan n l min Id e6ng dogn d i u tidn cua qud trinh ddo ching 16. Muln c6ng tdc khoan n l nhanh, hidu qua, thi vide tinh todn, Igp hp chilu phai phu hgp dya trdn cdc m i i lidn he giCra thilt bj thi cdng, kha ndng cdng phd cua thulc n l , hp chilu Id min, thCp ty n l v.v...
//. Thiit bj khoan
Thiet bj khoan guang chu y l u Id may khoan 16 dd hogt dpng theo kilu dap xoay, mui khoan phy thupc vdo dd ben cua da, ndn cd cdc logi nhu mui khoan ehu' nhit, chCp thgp, mui khoan hgt e i u v . v . D i n nay hau h i t vide eung d p ndng lugng khoan d i u su' dyng trgm nen khi trung tdm, e6ng suit vd luu lugng khi ndn Idn, du eung d p khi nen cho mpt vdi guang hogt dpng d i n g thdi. Vi' vdy, n l u tang lugng mdy khpan eung hpgt dpng trong mdt guang, nang lugng vd dp suit khi nen d i u c6 t h i dap u-ng.
V i n d l d n quan tam hien nay la nang cao hieu qua n l min, tang he s l su' dyng 16 min Id mpt trpng cac bien phdp giam thdi gian cong dogn khoan n l ,
mpt e6ng dogn quylt djnh d i n
thdi gian hodn thdnh chi ///. NhCeng yiu to hip&ng din hl^u qui nc. i nin
y- inh kinh loan thdi Id.
n SU' i6ng
6ng 1. Chiiu sdu vd dutrng l6 min
Thdi gian c6ng dogn n l thudng chilm 30+35 ^o gign chu ky ddo e h l l i Khoan n l kh6ng t i t d i n ( dyng l l khoan sau khi n l ddm bdo. Qud trinh n l
thdt d l khdng nhO'ng kh6 ib tgo d i l u kidn d l tdng h$ H\) SCP dyng l6 min md n l u mdt vai l l min kh6ng dugc kich n l ; d Idm eho kich thudc khii dd i:S ra qud ed, khdng dam baci jCho thilt bj xuc ble, vdn ehuyin ldm viec. Thdi gian cdn phd dti (do ddi, cdn t i y Idu, khdng du oHilu sdu ddt ept ching v v . . Idm tiing thdi gian e6ng dogn khoanjnl vd kdo dai thdi gian chu ky
Khoan n l trong cdc du6ng 16 mo kh6ng thugn Igi nhu trdn Ip thidn, do da trong guang hgn e h l bdi chf c6 mpt thoang duy nhit Id guang Dudng 16 co dien tich nho trung binh cho ndn khoan b i n ndng h i t SLPC khd khdr
Thulc n l chf phdt huy tac dyng phd dd khi mdnh lye n l du Idn 66 phd vd khii dd trong gyang hay dp suit n l trong 16 min phai Idn han nhilu l l r i ^ o vdi dd b i n kdo cua dd trt.>|ig vung bao cua dudng khdng ifid nhit. Do vdy, k i t qud n l cua \6 min phy thudc vdo sCrc cdrig phd cua logi thulc, chilu sdu 16, dudng kinh, hd s l ngp diy, the tich khii dd d n phd vv...
Chilu sdu |5 min phy t h u w vao nhilu y l u t l nhu: tinh c h i ca ly cua dd, lugng nydc chiiy iir gyang 16, dien tich tilt dieV dao, dudng kinh chodng va mQ
bj liidt
khoan, logi thilt bj khoan, dge bidt, e6n phy thudc vdo t l chCpc lao ddng trong guang. Khi chilu rpng guang 16 Id B, theo Suchanov [10], chilu sdu l l khoan dugc tinh:
4jg a
Trong d6: a G6c nghidng eua 16 ddt phd.
Theo thdi gian hodn thdnh chu ky ddo 16, chilu sdu l l min dugc bilu d i l n trong m i l quan hd cua lugng thulc n l q, didn tich dudng 16 khi ddo S vd mdt s l chf tidu khde theo cdng thCpc:
/ =
r
^ q ^ Tj.ip.cosa '^K.v.y P hay theo thdi gian d n thilt cho c6ng tdc xuc b l e d i n g thdi:
T.-C^^' +i.)
/ = r.
K.v.y P Trong do: \->, Thdi gian n l thong gi6;
f Thdi gian ngp thulc cho 1 16 min, l l y = 0,04 - 0,05 gid;
Y - Lugng thulc min cho 1m ddi l5 khoan;
K - S l mdy khoan cung Idm vide;
V - T i c dp khoan, m/gid;
T| Hd s l SLP dyng 16 khoan, T i = 0 , 7 - 1 ;
P- Nang suit xuc, mVgid dii vdi da nguydn khii;
(p - He s l Idm vide ding thdi giCra mdy khoan vd may xuc (9 = 0 , 5 - 0 . 7 ) .
Theo Onhika [5] vd tidu chuin n l min cua Nga BCH
KHCNM s o 3/2012* CNKT HXM L 6
126 - 90, chilu sau l5 min tuang quan vdi didn tich t i l t didn dudng 16 ddo (bang 1).
Bang 1. Tuxyng quan giiPa chieu siu lo min vi tiet diin dio
Thong tin khoa hpc cong nghe mo
Do kien CO "f"
1,5-3 4 - 6 7 20
Chieu siu lo min (m) S < 12m' S > 12m'
2 - 3 2 , 5 - 3 , 5 1,5-2 2 , 2 - 2 , 5 1,2-1,8 1.5-2.2
Khi thilt k l hp chilu n l min tgo bidn, khoang cdch giu'a cdc 16 bidn phai thoa man:
^<0,8
B (1)
Trong d6: a Khoang cdch giu'a cdc lo bidn, m;
B- Kich thude dudng khang nhd nhit, m;
Manh lye n l cua thulc min dugc t h i hien qua cdc thdng so: nhiet lugng, lugng khi san sinh khi chdy, t i c dp n l cua thulc n l . D i i vdi thulc n l nhu AH1, AD1 hay cao han Id P113,
nhiet lugng, lugng khi chdy t i c dp chdy l l n lugt chf vdo khoang 3400 kJ/kg; 7001/kg
hay c p '0 - 3800km/giay (bang 2, 3) :ung mpt lugng nhu:
nhiet U'gng, lugng khi chay hay t6c dp truyen n l , khi t h i tich Id r iin cdng Idn thi dp suit
n l cang giam. Vi vdy, n l u 16 min :l 6ng dugc chdn ehgt thulc; r 5 khong dugc chdn ehgt bing I ua chit lugng t i t thi hieu (J L a phd dd sd bj suy giam.
Theo [e ], [7], dudng kinh 16 min chf d n c Idn han dudng kinh thdi rhi i khoang 4 - 7mm vd chilu ddi bua min phai
D600 pi .1. D6 Id ly^ do tgi sao phai chpn dudng kinh mui khoai l-pang u'ng vdi dudng kinhtjic min.
2. b im lo min tao r^ch cijm /(| ( of phd
Ca^t no than su' dyng pho biln cLin 16 min tgo rgch dgng ndm (A) (hinh la). Cym 16 tgo rgch da ig ndm phu hgp vdi guancj 6 dd nCrt ne theo hudnri J i theo Idp vd d6ng vai tr6 qusri rpng d i n hidu qua n l min. \
Hidu c:ua n l min phy thupc r i t nhitBii vdo s l lugng mat thodnglva khoang cdch giu'a cdc 16 trlj.ig cym lo dpt phd. Khi cdc lo ,\iiii thupc cym l l dot
pha dugc pha tit, se tgo dugc thdm mpt mat thodng, ttpc Id tang thdm sy thugn Igi cho vide
no phd da. Khi d6 dudng can ngan nhit cua Id min khdng cdn Id chilu sdu tiy mieng Id d i n day Id theo hudng dpc tryc dudng Id, md Id khoang each giu'a l l min phd vdi mat phdng eua phdu no hinh ndm.
Mgt khde, SLPC cdng pha, t i c dp n l , kha nang sinh cdng vd sinh khi eua thulc n l cung anh hudng d i n vide chpn logi hinh cym Id dpt phd. Doi vdi thuoc n l ed SLFC edng no va t i c dp no trung binh nhu: P 113; Ammonit 6 >KB hay AH ^ thudng su' dy ng cym lo dpt phd dang ndm (hinh la). Khi eae dudng Id da tilt didn Idn, da nguydn khii, dp ben nen dpc tryc cao ngudi ta SU' dyng thuoc n l ed SLPC cdng pha Idn nhu: Powergel mag- num P3151 vdi cym Id dot ptia dgng try (hinh lb) hay xoay oc (hinh le). Khoang cdch vd gdc nghidng cua cym lo dot phd dgng hinh ndm theo [3], [4]
dugc gidi thieu tgi bang 2.
Bang 3 vd 4 gidi thieu cdc thdng s l ca ban eua mdt s l logi thulc n l thudng su' dyng
W
h.
Hinh 1. Hg chieu io min khi dio cic duwig Id di
KHCNM SO 3/2012* CNKT HAM LO
Bing 2. Cic thdng so co bin cua cym ddt phi d^ng ni i Dd kiin
c6f 3 - 4 5 - 6 7 - 8 9 - 1 0 1 1 - 1 3
14-16
Khoing cich giQ>a cic c$p Id ddt phi, m, 11 sinh cdng trong try chi cua thudc ni I) cm' 250 - 295
0.46-0,48 0,43-0.45 0,40 - 0,42 0,37-0.39 0.34 - 0.36 0.31-0.34
300 - 345 0.49-0,51 0.46 - 0.48 0,43-0.45 0,40-0.42 0.37-0.39 0.34 - 0.36
350 - 395 0,52-0,54 0,49-0.51 0,45-0.48 0.43 - 0.45 0.40 - 0.42 0,37-0.39
/ khi ning
WO - 450 C,55-0,67 C 52 - 0,54
49-0,51 46 - 0,48 D 43 - 0.45 C 40-0.42
Gdc nghiing
Id ddt phi Sd Id ddt phi (grad)
70°
65°
62°
60°
52°
52°
4 - 6
6-8 8-10 trong thyc t l . djnh r i t Idn d i n sy tci^) bidn. S l lugng l l min bidn tudn
Theo [5]. lugng thulc. n l Khodng cdch giO'a cd(;
phdn b l cho cym l l tgo rgch hgp vdi bilu thCpc:
chilm 20 - 30% lugng thulc n l « ^ A o /<^^
J. « — ^ " - o ( 2 )
toan guang. B
\S phu theo cdng thu'c:
N = P_
ak (3) Khoang cdch ddy l6 min cua jrong dd: a- Khoarjg cdch
cym dpt phd A dgng ndm (hinh gjo^g cdc l l min bidn;
1a) che t h i y n l u khoang cdch g Dudng khdng nH Idn (>_300mm) thi hidu qua SU' -p^eo kinh nghidm dyng Id mm [3] [5] Chi dgt 70 - ^^^ ,^ tilt didn trun j 80%, khi khoang each giCra ddy
Id dao dpng tCi-100 - 200m hieu qua SLP dyng 16 min dgt 85 - 95%, vd sau han cdc 16 phd 150-250mm.
3. Khoang cdch lo t^o bien
o nhit.
f(^i vdi binh vd Idn, khoang cdch giC'^ cdc l l min bidn < 0,6m. Cacj l5 bidn
vdi P - Chu vi dudng 16, a,^- Khoang cdch giCpa cdc l l min bidn theo:
|/'(i + 2J^-) (4)
r- Bdn kinh thdi Trong d6
thudng dugc b l tri k i U i g qud thulc n l , m.
cdch xa bidn 16 (50 - ' mm) vd p Hd s l truyin song n l e6 hudng xidn tgo vi dudng trong dd vd than, th6ng thudng bidn 16 gdc nghidng 1 0 - 1 5 0 trong vung da bj dgp va lly Khoang each vd lugng thulc ^^^^ ^^'' '"^' ''^- b i n g 2, trong vung dd bj nCpt ne n l cung nhu thCp t y n l quylt 4. Bi tri id min bier \/dldnin l l y bing 1,5.
Bing 3. Cic thdng sd cor bin cua thudc nd AH1; P1 /,'; PM 3151 TT
1 2 3 4 5 6 7 8 9 10 11
Ndi dung Kha ndng sinh cdng, Su-c cdng phd ~ ' (dd ndn try chi)
Tic dd n l
Khodng cdch truyin n l t y trpng thulc n l Dd nhgy va ddp Kha ndng chju nudc Thdi hgn bao qudn Dgng thulc n l
Dudng kinh thdi thulc
Khd ndng su' dyng trong mdi trudng CH4 vd byi n l
Don vj
thdng
Lo^i thudc P113 320 - 330
1 4 - 1 6 4,2-4,5
6 1,10-1^25
0 Rdt tit
6 I
PM 3151 390
16 5.4 1,23
0 Rit tit
> 6 NhQ tuang, thdi; Nhu tuang. thdi
32-180 ! 2 5 - 3 2 Khfing Kh6ng
KHCNM S6 3/2012* CNKT HXM L 6
Thong tin khoa hpc cong nghe mo
Bing 4. Khi ning sinh cdng, sinh khi vi tdc dg nd cua mdt so loai thudc cua Nga
Loai thudc nd Ammonit n l dd Ammonit 6 >KB GranulitAC-8
Khi nang sinh cdng, kJ/kg
5400 4305 5190
Khi ning sinh khi. lit/kg
830 895 847
j Toe dp truyen no km/giiy 6 . 0 - 6 . 5 3.6-4.8 3.0-3.6 Bing 5. Chisd cau true di "s'
Cau true di Dd khoi, khfing niPt ne , phdn Idp
Phdn khii ddy. chieu ddy giua cdc Idp > 0,6m Phdn khoi mdng < 0.6m
Nut ne NCrt ne ddy Thd che D6n d l vd NCpt ne doc tryc
Ldp dd vu6ng g6c vdi tryc 16 San, cudi kit
Set deo
Chi sd s 1,0 0,8 0.7 0,9-1.1 1,2-1,4 1,5-1,25 1.05- 1.1
0,8 1.25-1,35
1.9-2,0 2.0 p - Chilu sau Id rgch, l l y
bang 0,001m.
P- Ap suit n l tgo ra trong Id min khi n l tinh theo cdng thCpc:
P-.QMzR, ^ . (5)
Tgi day: Q - S l lugng Id min dugc tinh todn theo ydu d u kich thudc dd phyc vy van chuyin (bang tai) hay b l e xuc (thi tich gdu xuc hay kha nang va).
Tinh todn khoang eae giii'a cac Id min, giup djnh hudng vide b l tri Id min cho du nhung vide SU' dyng cae k i t qua tinh todn mpt each cCpng nhac la khdng dung. Bdi trong qua trinh n l , thu' ty vd vj tri n l phy thupc vdp tinh chat ky thuat cua khii da, hinh dgng t i l t dien dudng 16 ndn hidu qua no khong giing nhau. Theo thCp t y n l , kip n l cym 16 dpt pha bao
gid eung d l n l sdm nhit. Cae vdng n l theo thCp t y d l tan dyng dugc cdc mat thoang dugc tgo thdnh sau m i l l l n no. Song, khoang each giCpa cae 16 min, nhit la 16 min bidn va 16 min hdng nIn, theo kinh nghidm [1], [2], 66 n l dgt hieu qua cao, thudng phan bo khoang each giu'a ede lo min tgi gdc nIn vd ndc Id nhu sau:
Do tgi gdc Id dp khd n l cao nhit ndn khoang cdch giCpa cdc lo min thudng chf lly bing 2/3 so vdi khoang cdch giu'a cdc Id bidn theo tinh toan. Ddi khi phai b l tri thdm mpt Id phy cd gdc elm cao han, xidn vdo Idng d i t 66 tgo h i chdn ept sau nay
Cdc Id bidn tgi dfnh ndc Id, dp cd vj tri thugn Igi v l s l mgt thodng, tinh chit sdp d l cua dd ndc ndn khoang cdch giua cdc Id tgi ndc Id thudng lly bing 3/2 khoang each lo bidn (hinh1).
ThCp t y n l lo bidn va nIn 16 cung dugc uu tidn. Doi vdi l l hang nIn vd goc 16 SLP dyng s l kip Idn nhit, n l sau eung, khi da bidn vd ndc 16 da bj n l , dgp xuIng vd dgt n l cua hang min n I n se lam cho dd bj vd vyn thdm.
5. Luxrng thuoc no don vj Theo Laresa [10]
q = f,.s.u.-.d kg/m^ (6) A
Trong d6:
f l Hd s l can t i l theo loai da, lly bang 1/20f;
f Dp kidn c l cua dd theo Protodiaconov;
s Chf s l d u true da, lay theo bang 5;
u Chf s l dp eCpng cua guang n l phy thupc vdo mat;
thoang, lly theo bang 6;
e - Chf s l edng suit cua logi thulc n l . lly theo bang 7:
A - Mat dp thulc trong Id min lly bing 0.9;
d- Chf s l mu'c dp nap bua, khi chit lugng tit, lay bang 1;
Bing 6. So mat thoing trong
gifong Sdiirgmg mat thoing
1 2 3
Chisd u 1.8-2,2 1.4-1.6 1,2-1.4 D6 sau khi n l khdng bj thCpa tilt didn hay he s l "lem" nhd, vide SU' dyng lugng thulc n l tgi mdi Id bidn d n dugc chu y. D6 giam lugng thulc n l tgi cdc Id min bidn, ed t h i SCP dyng cdc thdi thulc ed dudng kinh nhd
KHCNM s o 3/2012* CNKT HAM LO
oei^isP'
Bing 7. Chi sd cdng Lo^i thudc nd I Dynamit62%
1 1
1 Ammonit th6ng thudng ] Ammonit dd
Thulc n l zelatyn Thulc n l karbonit
suit thudc nd e
Khdi try chi Trauzl cm' 360
360 1 350
600 1 260
Chisde 1 1.25
1.2 0.8
han thdi thulc thdng thudng ((j) 22mm so vdi (j) 32mm) vd dudng kinh 16 eung giam theo.
Song, thi c6ng cdc Id ed dudng kinh khde nhau trong mdt guang Id rit phCpc tgp ndn thgy vi thay d i i dudng kinh l l vd thdi min ngudi ta SLP dyng cdch nap phdn dogn.
Lugng thulc n l , s l lugng Id min phy thupc vdp ydu d u tgo kich cd da phyc vy eho xuc b l e vd van chuyin. Theo Taranov
R 9\ [3]:
^ = 0,4.
VO.2./
-i-^ ,
-\k , kg/m3 (7)
Trong dd:
e-1 = Par/ Px vdi Pax -Cdng suit thulc n l theo tidu chuan;
Px - Cdng suit logi thulc n l su' dyng
k = 1,2 - 1,3, Id he s l gia tang thulc n l khi d n thilt su' dyng phd da theo kich thudc ydu c i u eho ble xuc vd thilt bj van chuyin.
s l lugng Id min trong guang:
N =
21.4s
Vl,5.r_+2,5
(8)Trong dd: V^^ax "K'ch thude da n l theo logi thulc n l [3].
6. Phuung phdp no
D6 hidu qud n l min eao, t i t cd cdc l l min d i u phai dugc kich n l vd phdi n l hit, m u l n t h i , kip n l phdi ddm bdo dugc kich n l . Th6ng thudng, cdc dan vi v i n sip dyng kip n l vi sai didn, tuy nhidn vide d i u n i i kip didn phCpc tgp, nhilu nguydn cdng, d l d i n d i n nhCpng sai sdt nen k i t qua n l khdng cao. Kich n l bing kip vi sai phi dien se ca ban k h i c phyc duac nhu'ng nhuge dilm ndi trdn, gdp p h i n cai thien hieu qua n l , ndng cao t i c dp ddo Id.
Tdm Igi, ndng cao t i e dp ddo Id trong giai dogn hipn nay khdng t h i khdng chu trpng d i n nhCpng v i n d l ky thugt ca ban trong mdi cdng dogn eua chu ky ddo ching 16. V i n d l hidn nay Id d n thyc hien d i y du vd dung cdc ydu d u ky thudt ca ban, trudc h i t Id khoan n l min, SLP dyng thulc, kip n l mpt each hgp ly./.
Tai li^u tham khao:
1. Phan Vinh Gidi, Ph^m Minh DIIC vd nnk 1980, Bdo cdo ting kit di tdi cip Bd:
"Nang cao tic do dao Id xuyen via mCK -97,5 Cdnh tay Mong Duvng"
2. Phan Vinh Gidi, Ph^m Minh Due. Ddo Van Canh,
1982, Bdo cdo tong kit de tdi cip Bd : "Nang cao tic dd ddo Id dd md than Mao Khe"
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10. Poradnik Gomika tom 2 - Katowice 1959
11. Bdo cdo: Tong kit cdng tdc XDCB cdc md than ham 16 ndm 2010. phuxyng hiedng nhidm vy nam 2011 -H^ Long 2011
12. Bdo cdo: Tong kit cdng tdc dau tir xay di/ng cdc mo ham Id nam 2011, phuung hu^ng nhiem vu nam 2012 - Ha Long 2012.
KHCNM S6 3/2012* CNKT HAM LO
