Thong tin khoa hpc cong nghe m o
NGHIEN Ciiu DANH GlA MOT SO SO DO CONG NGHE CO GlOl HOA KHAI THAC CAC ViA DAY DOC THOAI D E N NGHIENG HA THAN THAN NOC
(t cac mo than ham lo vOng Qoang Ninh
For meeting the increasing coal demands to the national economy, coal mining operations have been more and more carried out at the deeper and deeper levels. Therefore, for increasing the labor produc^vity and labor safety, decreasing resource losses and improving the working conditions for the workers, the application of the coal mining mechanization to some underground coal mines in Quang Ninh area in recent years is an essential task. The paper refers to the research and evaluation of some mechanization flowsheets for mining the thick coal seams having gentle to indined slopes with top-coal falling and caving method at underground coal mines in Quang Ninh area
NCS. NONG VIET HONG Vi$n Khoa hoc Cdng nghd Md-Vinacomin
BISn tdp: TS. Truvng Due Dv
L D a t v i n d l
De dap img nhu cau ngay cang tang cua n i n kinh t l va dam bao an ninh nang lugng quic gia, T^p doan Cong nghi#p Than - Khoang san
\fl#t Nam cd chu tm-ang phat trien nganh Ttian b i n vung gan lien vai bao ve mdi tru6'ng theo huo'ng d l i mai cjng ngh^, trien khai ung dgng cdng ngh0 ti&n t i l n trong cac cdng dogn san xuit, nham tdng nhanh san lugng than khai thac ham Id, tang nang suat lao dpng, giam t i n thlt tai nguyen, dong tho'i ndng cao muc dp an toan va cai thien ^ e u ki$n lam vi^c cua nguai lao dpng, trong dieu kipn khai thac ngay cang xuing s3u. 6 l dat dugc muc tieu de ra, c i n thilt phai trien khai ap dgng ca giai hod cac khdu khiu than, chong giu Id chg va van tal, tgi nhung khu vuc dieu kien ^ a chit cho phep, hipn dgi hoa d^y chuyen san xuit than ham 16. thay t h l d i n lao dOng thu cong, tao ra bud'c nhay vpt v l cdng nghe. Day la ddi hdi d p bach cua qua trinh cdng nghiap hda va hipn dgi hoa nganh Than.
K i t qua ap dgng thu nghi$m cdng nghp ca gid'i hod khiu than d' m i t s l md nhung nam qua da khang ^ n h hud-ng di dung dan cua vi^c phat triln ap dgng cdng nghe ca gid'i hoa dong b|.Tuy nhien, trong qua trinh triln khai ap dgng, vJ mpt sd nguyen nh^n khach quan va chu quan xuit phat t u cac van d l v l <^a chit, ky thu§t,...
ndn d mpt s6 d i l u ki^n dja chat-ky thugt md nhlt dinh da bud'c d i u ap dgng thdnh cdng, d' m0t s l dilu ki0n khac cdn nay sinh nhung kh6
l^an vuang mac can phaj tiep tgc nghien cuu gial quyet. Mpt trong cac van de quan trpng dd la hieu qua ha tran thu hoi than gan vai qua trinh xuat hipn va dien bien ap luc md trong 16 chg, tuc la moi quan hp tuang tac giua khoi da vach vai gian ching t u hanh cd anh huang ra sao tai qua trinh ha trln than.
V i n nay phg thupc bo'i r i t nhilu yeu to: (a) chilu day, d6 d i e vra;(b) dp sau khai thac;(c) dp b i n vung va tinh chit sap d l cua da vach tare tilp va da vach ca ban.dp cung cua than;(d) loai gian ching su dung va c h i dp lam viec cua gian ching trong 16 chg;(e) phuang phap hg trln than; (i) cac thdng so sa do cdng nghp khau nhu chilu rpng guang Id chg, chieu cao guang khiu, chieu cao ha tran, bud'c hg t r l n than,trinh t u h a tran,v.v ...
Dk giai quylt dugc nh&ng vuang mac neu tren, c i n nghien cuu mpt so yeu t l anh huo'ng den sg d l cong nghe; nhijng vuang mac trong qua trinh thuc tiln san xuit d' cac Id chg ca giai hoa dong bp da, dang va se dugc lap dat dua vao san xuit trong thd-i gian td'i tgi mpt s l md h i m Id vung Quang Ninh.
2. Mpt sd y l u td anh h u ^ n g ap luc mo d i n s c dd cdng ngh$ trong qua trinh khai thac, ha t r l n than
Ap lue md trong Id chg ndi chung va d l i vai Id chg via day, doc thoai va nghieng ndi rieng phg thupc vao hang Icgt cac y l u t l cdng nghe
KIICNM SO 8/2016* CNKT HAM LO ^5i5>l
Thong tin khoa hpc cong nghe mo
va dac dilm dilu kien dia chit md. 0 trang thai toan cac chi tidu kinh t l - kJ thu^t oe ban;
lam vide, gian ching phai dyec tInh toan sao . Xay dyng phyeng phap tinh to4n hi?u qua cho dam bao chdng giCr duec lop than ha trln kinh t l dp dyng cdng ngh$ co gidi hoa ddng cung khdi da nam bdn tren trong phgm vi gyeng bd trong cac md h i m Id (mo hinh tinh to4n, xSc Id eho, nhy vay, tren thyc t l giiJa khoi than d|nh hieu qua kinh t l )
ciing dd ndc (vach) vdi gian ching va try via tao Q^ gjjl q^y^t cSo ndi dung trdn, cAc nghidp thanh mpt hp co hpc cd mdi tyeng tao chat che ^^^^ ^ y e c t i l n hanh bang cao phyeng ph4p:
va thdng qya vipc nghien cCru, m l i tyong tac _ py^^^^^^ p^|^p gg g ^ ^ t(,y,o nghipm tal hidn nay cd t h l dilu khiln ap iyc mo trong khu vyc ^^ ^^^ ^^^^ l^p ^^^^^ ^^,^1 ^^^ ^^ g^ ,j^^
Id che d l dam bao cho cdng tac ha tran thu hoi j ^ . ^ ^^ ^^ ^^^^ ^^ ^p 1^,^, ,|.Q„g |,g (^j„g ^^
than dyec tiln hanh thudn lei nhlt. chdng, thdng ke san lyeng than ha trln, do dich • Be xac dinh moi quan hp tueng tac giira khli g^^g ^ j biln dang trong dydng Id chuin bj, da vach va gian chdng trong qua trinh khiu than ^ ^ g , , g^, (jjng p„|t thudng cdc hipn tyeng xay ha trln, c i n tien hanh nghien ciru; ,a trong Id che nhy Id' gyong, tyt ndc, dd tran
- Cae so dd dae tryng cua sy tac ddng tyong vdo gyong Id, tinh trang gian chong...
hd giya vl chdng vdi da vach va tinh trang on _ phy<yng phap md phdng sy tdc ddng tyeng dinh lop than ha tran d cac vi tri khac nhau trong |^g g| j,g i^t,^-, gg v j o j , va gian chdng bang mo Id che; hinh so;
- Sy djch chuyin va pha huy cua da vach _ phyong phap danh gia tong hep than va tren ndc Id va dac tinh cdng tac thye t l ciia he
vl chong;
- Gia tal ban dau va sire khang cua he vl ching;
- Sy anh hydng cua qua trinh khiu than Id che d i n tinh trang ap lyc md trong Id che;
- Dp liin eua vi chdng xudng n i n Id.
- Sy sap do cua da vach tryc t i l p va da vach CO ban trong id cho;
- Tinh chat Id gyong, tut ndc trong Id che;
- Sy phan bd ap lyc md trong Id che va Id chuan bi;
- Danh gia anh hyeng cCia cac edng doan khau than va ha tran d i n quy luat phat triln ap lyc md trong Id ehe
- Xac dinh quy luat bien dang, pha huy va tinh chit sap d l eua da vach trong Id che;
• Nghien ciru hoan thidn se do cdng nghe,
cac dilu kipn d|a chat md.
Dd biln ddng chieu day via tinh theo cdng thirc;
v^=
' " (m-mtb)^
nib
.100% (1)
Trong dd; m - Chilu day via tai diem do, m;
m - Gia tri trung binh chieu day via, m; n - So diem do.
Nlu; V <35% - Thuan loi cho vipc ap dyng CO gidi hod khai thac; V,„>35% - Khd khan cho vipc ap dung co gioi hca khai thac.
- Xac dinh gdc doc via cua khu vyc nghien ciru; Theo phdn loai lya chpn cdng nghd khai thac than, gdc doc via d y e c phan ra cae io?i nhy via thoai cd gdc ddc tir 0+18°, via doc thoai tir 19+35°, via ddc nghidng tir 36+45°, via die cac thdng sd ky thuat co ban va quy trinh khaj nghieng va via doc dirng tir 46+90°;
thae sy dung may khiu va gian chdng;^ se do _ ^^ ^^^^ g^ [j| < ,^ ^gl g^^ (jdc via; COng nhy edng nghe khiu gyong vdi chilu cao khau than ^^. ^^^ ^.^^ ^j^y ^ja^ g ^ ^ die via va mirc dp va chieu day Idp thu hdi hop ly, loai gian chong ^^.^^ ^^ . ^ j ^ ^ ^ia anh hyeng rat Idn den cd kit elu ha trln thu hdi than vdi cac che dp ^^^^^ ^^^^ ^^^^^ Hf,ai j^ac, dpng bp thiet bl lam viec phu hep vol dac diem tinh chit khli ^ |^.- ^^^ ^^ ^.^^ . j ^ I j n , ^j^c ciia thilt bj.
da vach tru via, chilu dai bydc ha trln va trinh ty ha trln thu hdi than, cac gial phap chdng giy nga ba Id che-ld dpc via, quy trinh cdng nghp khai thac, xi> ly mpt sd sy cd thuong gap. tinh
KIICNM s o 8/2016 * CNKT HAM LO
Bd biln doi gdc d i e via dypc tinh theo cong thirc;
Thong tin khoa hoc cong nghe md
|^(°i-atb)^
(n-1) (2)
.100%
Trong dd; a, - Gdc ddc via tai diem do, dp;
a„^- Tri sd trung binh gdc d i e cua via, dp; n - S l diem do.
Se d l cdng nghe khai thac co gidi hoa phai dyec lya chpn trong moi tyong quan giira cac y l u t l chilu day vd gdc ddc via, phai cd sy danh gia anh hyeng l l n nhau trong ciing mpt khu vyc nghien ciru chiing phy thude vao pham vi Idm viec cua ddng bp cac thilt bi co gioi hda;
- Xac dinh dac tinh da kpp trong via bao g l m s l Idp da kpp va cac S da cyng l l n vao via than cua khu vyc nghidn cCru. Ba kpp va cac dang da I cirng trong via than anh hydng idn tdi dp b i n clJa thilt bi CO gidi hda va chit lyeng than. D^
danh gia tinh chat cua da kep, phai thdng qua tinh chat co ly cua chung nhy lyc khang keo, khang nen, khang cat, dp kien cd,...;
- Xac dinh he s l phin tram da kpp; D l i vol cac so do cdng nghe co gidi hda khai thae, dilu kien thuan lei khi he so p h i n tram da kep K,<10
%, cd khd khan chp so do ce gioi hoa K,<20%
va r i t khd khan cho so dd co gidi hoa khi K,>20
%. He s l phin tram da kep trong via duec tinh;
K f = £ i . 1 0 0 % (3)
^ my
Trong dd; k ' - He sd p h i n tram da kpp, %;
Zm^ - Tong chieu day cac ldp da kep trong via, m; m^,- Chilu day via than, m.
- Xac (flnh he sd ldp kpp; Chi tieu he so Idp kep la so lep kep cd trong mdt met chilu day via than (KJ). De thu|n loi vd cho phep ap dung so dd ce gioi hoa khai thac khi K, < 2;
- Xac dinh e l u tao va tinh chit cua vach gia;
Vach gia la loai vach cd chilu day nhd hon 1,0 m cd c i u tao d i t da m l m y l u , lyc khang nen nhd hen 150 KG/cm= va nam sat ngay tren via than. Ldp vach nay t y sap do ngay sau khi khiu than. Day Id loai vach gdy khd khan cho qua trinh CO gidi hoa khau than khi sir dung cac loai cdt chdng khdng che kin ndc;
- Xac dinh c i u tao va tinh chit da vach tryc
tilp vd da vdch ce ban; theo mirc dp ben vu-ng, dd vdch duec phdn thdnh b i n leal ben vu'ng, ben vOng tmng binh, khdng b i n virng va rat yeu. Chi tieu phan loai la dien tich Id trln sau khi khiu gyong va thdi gian ton tai I n djnh b i n vQ'ng. Cac chi tieu nay ddng vai trd quan trpng trong vipc lya chpn ddng bp thiet bi chdng giir gyeng khai thac va xay dyng quy trinh cdng nghp khai thdc ce gidl hda.
3. Danh gia kha nang ap dgng co* gid'i hda tai mpt sd mo him 16 vung Quang Ninh
Trong pham vi cac khu vyc md cd kha nang CO gidi hoa, cac y l u td djnh iueng quylt djnh d i n lya chpn md hinh co gidl hda bao gdm chilu ddy via, gdc ddc via, chilu dai theo phyong khu khai thac, chieu dai theo dp ddc khu khai thac. Cac y l u td tren dyec nghien ciru danh gia tong t h l theo mdi tyong quan vdi trir iueng eOa chinh khu vyc dya vao nghien ciru.
Nghien ciru mdi tyong quan giira chieu day via vol tong trCr lyong cho thiy, eac khu vyc via day nam chu y l u trong pham vi tir 3,5 - 6,0m (35,9%) va ldn hon 10m (34,1%). Via ed chilu day trong pham vi ttr 6,0 d i n 10m chilm 29,9%
(hinh 1).
^S (6.01-I0.0)n
^ ^ '
1 1 j l _
3-'!)95'it
'
34.15
T
1 J 35 90)1
-
Hinh 1. Mii tuong quan giira chiiu diy via vOi ting trir luong cd khi ning co gidi hda Trong phan tioh m l i tyong quan glD'a gdc doc via vdi tong tru' Iypng cd kha nang co gidl hda, trO' lyeng cd kha nang co giel hda tap trung chu y l u trong pham vi via cd dp doc d i n 25°, chiem 68,7 % tong trQ' iueng, pham vi giel han 25 + 35°
chilm tyle 31,3% (hinh 2).
PIOT 0 - KHCNM SO 8/2016 * CNKT MAM LO
Thong tin khoa hpc cong nghe m o
Mdi TUONG QUAN GlOA G 6 C D 6 C v l v vOl T 6 N G T R O LUONG CAC KHU VVC DAY D d c
Hinh 2. Mii tuang quan giOa gdc die via vdi ting trO luong cd khi ning ca gidi hda Y l u to gdc doc via anh hydng Idn d i n vi$c
hdnh dSnh glS phan tich tr6n cdc dSi phan bo trii lyeng theo chilu ddi theo phyong khu khai thdc d i n 300m, 300 + 800m vd tien 800m, trdn co se hipn trang khai thdc ode tilng dang huy ddng vdo khai thdc vd cdo t i n g se huy ddng vdo khai thdo cua cdc md h i m Id, k i t qud t h l hipn trSn hirih 3.
Tren hinh 3 cho thiy, trO lyeng tap tmng tal cdc khu vyc cd chilu ddi theo phyeng ldn hon 800m, chilm 68% t i n g trD' lyeng cd khd ndng CO gidi hda. Tuy nhien, tru' lyeng ndy tap trang 6 cac mirc sau nhy M?io Khe, Vdng Danh, Dyong Huy, Hd Lam vd Niii Bdo, hi$n chya cd nhilu cdo cdng trinh tham dd vd khai thdc nham xdc dinh cdc phay phd kiln tao. Trd lyeng cdc khu vyc khai thdc cd chilu ddi theo phyeng ttf 300 800m chilm 29% vd trO' lyeng cd chilu dai lya chpn dong bd thiet b| co gio, hoa, theo ket ^^,. ,^j.
qua phan tich mo, • ^ " " S ^ . ^ f " 9 ' ^ ^ 9°= ^°= ^ ' ^ n g cd khd ndng ce gidl hda. Tri> lyeng eua via vo, tong try l^d-nQ,-:" ^^a nang ce gK,^hpa J 9 , , „ „ g 8 p h , „ vi nay tyeng d l i chic trong dilu kipn cac via than vCng Quang Ninh,
c i n xem xet lya chpn d i n g bp thilt b| ce gidi . hda cd kha nang khai thac 6' cac pham vi gdc die via d i n 35°.
Mpt trong cac yeu to quan trpng quylt djnh den hieu qua md hinh ce gidi hda khai thac la chilu dai then phyong khu vyc khai thac. Y l u to nay anh hyeng Idn d i n thdi gian lap dat, van hanh, thdo do vd di chuyin ddng bp thilt bi CO gidi hda, d i n tdi anh hyeng d i n hieu qua kinh te khi ap dung ce gidi hda^ khai thac. K i t qua nghien cu'U va danh gid y l u to chieu dai theo phyong khu vyc khai thac cho thiy, do anh hydng cua phay pha kiln tgo va phyong phap md via, chuin bj tai cac md h i m Id, cac khu vyc hien dang huy dpng trO' lyong vao khai thac cd chilu dai theo phyong khdng Idn, nhy khu vyc Canh Bic, Mao Khe, cd chieu dai theo phyong len nhat dao ddng trong khoang 700 + 900m, khu Trung tam Dyong Huy dao ddng tir 600 +800m, khu vyc Khe Chdm 1 dao ddng tir 400 +700m, cdn lai phin len tai cac md cd chilu dai theo phyong khu khai thac ttr 350 + 500m.
Tai eae mirc sau hon, phu thupc vao se dd me via va chuin bi ed t h l tang chilu ddi mdt s l khu vyc khai thac len tren 1000 m tai eac md Mao Khe, Vang Danh, Dyong Huy va Khe Cham.
Vdi kinh nghiem ce gidi hda khai thac tai cac nydc Trung Quoe, Nga, Ba Lan, CH Sec, v.v., lya chpn md hinh co gidi hda tren ce sd chieu dai theo phyong khu khai thae, d l tai da tiln
KHCNM s o 8/20,6 * CNKT HAM LO
chdn do da cd cdc cdng trinh dudng Id tham do vd khai thdc.
MrtjTirONG QUAN UiOA CHlE'u DAI T«E<> PHCONlI VIA vOi MNG Hto LI;«NG CAC KHO VVC DAY, D6C
Hinh 3. Mdi tuang quan giita chiiu dii theo phuang khu khai tfiic vdi iing trir luong
ci khi ning co gidi hda Bleu nay cho thiy kha ndng dp dung ce gidi hda ddng bd may khiu k i t hep vdi gidn ty hanh gap nhieu khd khan trong cdng tdc lap ddt va di chuyin didn khai thdc. Trdn co sd mli tuong quan glD'a ph?m vl gidi han chieu dai theo phyong khu vyc khai thdc vdi tdng tri> lyeng cd kha nang ce gidi hda, cho phdp dmh hyeng dyec md hinh ce gidi hda thich hep cho cac mo h i m id viing Quang Ninh.
Tir cdc nghidn ciru va ddnh gia kha nang dp dyng ce gidi hod khiu than viing Quang Nmh, vdi mpt s l y l u t l ce ban quylt dinh d i n vide lya chpn md hinh ce gidi hda nhy chilu ddy va
Thdng tin khoa hpc cong ngne mo
gdc doc via, chieu dai theo phuang va theo dp d i e khu khai thac, cd the dua ra dup'c cac (^nh hudng trong phat triln cdng nghp ca giai hda khai thac tgi cac md ham Id vOng Quang Ninh.
4. D l xuit s a dd cdng nghe va ddng bo thilt bi ccr gid'i hda khai thac trong dilu ki^n vung Quang Ninh
Hi$n nay, tai mOt so nuo'c cd nen cdng nghipp than phat trien tren the gid'i nhu Nga, Tmng Quic, My, Ba Lan, Due, Australia..., vipe ap dung cac giai phap cdng nghe theo huo'ng ca giai hoa trong trong dilu kien vfa day, dp d i e d i n 35° da va dang rat phat triln, dong thai khdng ngung dup'c hoan thien tren ca sa phat triln cac phuang phap chuan bj rupng md va hp thing khai thac hgp ly, phuang phap dieu khiln da vaeh kinh te, cac thilt bj ca gid'i hoa khiu than phu hp'p va co hipu qua. Tuy theo ^ l u kipn
<^a chat - ky thuat md, mpt so sa dd cdng ngh$
khai thac ca giai hda d^c trung da duac ap dgng, bao gom:
- Sa d l cdng nghp khai thac cdt dai theo phuang, khiu toan bp chieu day via ap dung cho eac khu vuc vfa cd chieu day d i n 5m, gdc d i e d i n 25". U'u ^ e m cua sa d l cdng nghp la san lugng cua c ac Id chg dat dugc cao, vf dg nhu tai cac nudc My, Canada, Australia, su dung to hgp thiet bj ca gidi hda khai thae eho vfa than cd chieu day t u 4,0 ^ 4,5m cho san lugng khai thac dat t u 2,0 -^ 4,0 tripu tan/nam, nang suit lao ddng dat tiJ 8 ^ 40 tan/edng, t i n that than nhd (5 ^ 10%), chu yeu do mat mat trong cac try bao vp Id dpc vfa.
- Sa do cdng ngh^ khai thac cpt dai theo phuang, ca gidi hda khau than Idp trg va ha tran than ndc tgi cac khu vuc vfa day (m a 5 met) va d i e d i n 35°. Tgi mdt s l nudc nhu Slovakia, Ba Lan va g i n day nhat la Trung Quoc, da ap dgng rpng rai cdng nghp khai thae nay va cho san lugng rat cao. Vi du tai md Oing Tan (Trung Quic), sau 9 nam ap dgng sg d l cdng nghp nay tgi cac vfa cd chilu day 5,6 -^ 6,5m, gdc d i e 3 ^ 8° da cho san lugng tang t u 2.720 ngan t i n nam 1994 l^n 6.080 ngan tan nSm 2002, nang suat lao dpng binh quan tang t u 2,8 ngan tan jdn'14,3 ngan tan/ngudi/nam. U'u diem chi'nh cua cdng nghp la dap ung r i t t i t yeu c i u ve san lugng, nang suat lao dpng cao, hgn c h i su phg thuOc cua b i l n dOng chilu day via, giam chi
misB 0 -
phf mdt Id chuin bj. Tuy nhien, nhugc dilm Idn nhlt cua cdng ngh$ n^y \d muc dp ton that than tugng d l i Idn (thudng dao dpng trong khoang 20 -^ 30%).
- Sa d l edng nghe khai thac chia Idp nghieng, khiu than Idp vach (trai ludi), Idp trg va hg tran thu hoi than Idp gi^a ap dyng trong dieu kipn vfa day (m > 5 mdt), doc d i n 35°. Sa do cdng nghe nay da phat trien tuang d l i manh tai cae nudc thude Nga, Ddng Au va Trung Quoe. U'u dilm eua sa do cdng nghe la giai quylt dugc van d l dilu khien da vach trong khai thac v\a day ed dilu kipn da vach khd sap do ma eac Id chg khai thac Idp trg ha tran than ndc khdng thuc hien dugc. Nhugc diem la chi phi met Id chuin bi cao, ton that than Idn va chit lugng than giam do d i t da da pha hda cua Id chg vaeh tran vao khi thu hoi than Idp giua cua Id chg trg.
- Sa do cdng nghp khai thac chia Idp nghieng, ha trln than tai t i t ea eae Idp khau. Trong trudng hgp vfa qua day (>10m), khi ap dung cong nghe Id chg bam trg ha tran, Idp than thu hoi Idn (>
8m) d i n den he s l thu h l i giam, gay ton that than ldn. Nham khac phgc nhugc diem tren, sa d l cdng nghp khai thae chia Idp nghieng, hg tran than tai tat ca eae Idp khau duge nghien cuu va ap dyng. Nhung k i t qua dgt dugc khi ap dung tgi Trung QuIe r i t kha quan, cdng suit khai thac eae Id chg thudng dat t u 2 -^ 4 trieu tan/nam, nang suit lao dpng dat 70 -^ 200 tan/cdng. Day la sa dd cdng nghp dugc ap dgng p h i biln vdi nhung vfa than d i e thoai d i n nghieng cd chieu day Idn.
Tren ea sd k i t qua danh gia t i n g hgp dilu kien dja chat - ky thugt md cac khu vuc vfa day (> 3,5 m), dp doe den 35°, ed kha nang ap dung edng nghp ca gidi hda, tong hgp kinh nghiem ap dung cdng nghp khai thae eac vfa day, doe den 35° tai cac nude cd nen edng nghipp khai thac than phat trien va dilu kipn thue t l eua Vipt Nam, ed t h l de xuat Iga chpn eae sa do cong nghp khai thac ca gidi hoa cung dong bp thiet bi eho tung dilu kipn cac khu vuc cd kha nang ap dyng cdng nghp ca gidi hda khau than nhu sau:
- Sa do cong nghe khai thae khau dong thdi toan bp chieu day via vdi ding bp thilt bi may combai k i t hgp gian ching t u hanh, ap oung eho cac khu vuc cd dieu kien via day den 3,5m, gdc die den 25°, Sa d l cdng nghp khai thac nay
KIICNM s o 8/2016 * CNKT IIAM L 6 ^WM
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Hinh S. Sa do cdng nghi khai cic Idp ha trin than Idp ed t h l ap dung tai mdt sd khu vyc cd chilu ddi theo phyong ldn trong pham vi danh gia, gdc doe via nhd nhu md Ha Lam va Nui Beo.
- So dd edng nghe khai thac khiu ldp tm ha trln than ndc, vdl ddng bd thiet bi may combai k i t hop gian chong t y hanh cd k i t cau ha t r l n than, ap dung cho cac khu vyc cd dieu kien
. thic chia Idp nghiing. khai thic tni ha trin than Idp ndc
via tir 3,5 + 8m, gdc d i e d i n 35«, da vaeh tryc tilp tir kem I n dinh d i n I n djnh trung binh (de sap d l ) nhy t h l hipn tren hinh 5. So do cong nghp khai thac nay cd t h l ap dyng eho cac mo dac tryng nhy Vang Danh, Nam Mdu, Ha Lam, Dyeng Huy Ha Long, Khe Cham, Nui Beo.
- So d l cdng nghd khai thac chia Idp nghieng.
KIICNM SO 8/20,6 * CNKT ,,AM LO
Thong tin khoa hpc cong nghe mo
khau than Idp vach (trai ludi), khai thac Idp tru ha trln than Idp giua, vdi dong bd thilt bj may combai k i t hgp gian ching t u hanh cd k i t e l u ha trln than, ap dyng cho eac khu vuc via d^y tu 6 -^ 10m, gdc d i e den 35°, da vach cung khd sap do. Cd t h l ^p dyng cho cac mo Nam Mau, Vang Danh, Nui Beo, Ha Long va H^ Lam.
- Sa do cdng nghp khai thac chia Idp nghieng, khai thac cae Idp hg tran than ndc, ding bp thiet bi may combai k i t hgp gian ehing t u hanh cd k i t elu hg tran than, ap dung eho eac khu vuc ed dieu kipn via day tren 10m hogc c^c trudng hgp Idp da kep ngan each tgo thanh cac Idp khau, cac phan via co chilu day Idn han chilu cao khau guang thdng thudng, gdc d i e via d i n 35°, da vach true t i l p t u khdng on djnh d i n I n djnh trung binh. Dong bd thiet bj cung nhu cae edng dogn khac cua day chuyin cdng nghe hoan toan tuang t u nhu d l i vdi cdng nghe khai thac Id chg trg ha tran than ndc. Cd the ap dgng eho cac md Vang Danh, Ha Lam, Thong Nhat, Khe Cham...
5. K i t luan
Vdi cac k i t qua danh gia ting hgp tru lugng va nghien cuu de xuat cac sa do cdng nghe ca gidi hda cho cac khu vuc vfa day die d i n nghieng vung Quang Ninh, cac md ham id trong pham vi danh gia, can cu vao ke hoaeh khai thac, kha nang can d l i tai chfnh va muc dp tai nguyen, can sdm cd nhiJng ke hoach cu t h l d l tung bude trien khai dua cdng nghp cu gidi hda vao ap dgng trong thuc t l san xuat, nh§m dap ung nhu cau v l san lugng cua cdng ty cung nhu dam bao phat trien ben vOng nganh Than trong dieu kipn ngay cang khd khan va ddi song xa hdi ngay cang tang cao. Tuy nhidn, t u k i t qua phan tieh eung cho thiy, cac via than vung Quang Ninh cd dilu kien dja chit - ky thugt md thude logi phuc tap, muc dp biln dOng ve chilu day va goe die Idn, thgm chf thay doi theo tung via, tung khu vuc
khoang sang trong pham vi nhd. T i t ca nhung y l u t l nay cd t h l anh hudng d i n su thanh cdng cua eac md hinh ca gidi hoa d nhilu cap dp r i t khac nhau. Do vgy, trude khi dua ding bd thilt bj ca gidi hda vao ap dyng, can xem xet, khoan tham dd bo sung va xac dinh cudng dp khang nen cua cac khu vuc du dinh ap dyng edng nghp ca gidi hda d l ed s l lipu danh gia ehi tilt han nua cac dgc dilm dilu kipn dja chit, mue dp biln dpng chieu day va gde doc, d l co cae giai phap ky thugt cdng nghp phu hgp dam bao khai thac hipu qua cdng nghp ca gidi hda khai thae, dam bao yeu to dau t u thu h l i v i n sdm nhat/.
Tai Ueu tham khao
1. Phung Manh Dac (2006), Bao cao tong ket khoa hoc va ky thuat de tai Nghien cwu cdc giai phap khoa hoc va cong nghe nham huy dong tong hap tal nguyen phijc vu chiin Iwac phat then ben vUng trong khai thdc va sw dung than d Vi$t Nam.
2. Tran Xuan Hda (2011), Bao cao tong kit de tal trpng diem cap BQ Cong Thwong "Nghien cCru nang cao mwc do ca giai hda va hien dai hoa khai thac than ham Id vd dmh hw&ng irng dung cho cac mo than ham 16 vung Quang Ninh". Vien Khoa hpe Cdng nghe Md.
3. Do Manh Phong, Vu Dinh Tien (2008), Ap li/c mo ham 16. NXB Giao thong V$n tai.
4.A.A. Borisdv(1980), Ca hoc da vd dia tang.
Tilng Nga. Nhedra. Moskva.
5. Vipn Khoa hpe Cdng nghe Md-Vinacomin (2012), De tai trpng diem eip Nha nudc "Xay dwng ca sa dO lieu dja co mo phuc vu nhu cau phat trien ca glai hoa, hi$n d^i hoa khai thac than a Vl$t Nam".
6. Bao eao (2012), Danh gia ket qua ap dijng cong ngh$ ca giai hoa ddo 16, khai thac than vd then vong phat then trong Tap doan Cong nghiep Than - Khoang san Viet Nam.
