Thong tin khoa hoc cong nghe m o
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DANH GIA HIEN TRANG VA DE XUAT HO CHIEU CHONG GIlT LO CHO HOP LY CUA CONG NGHE KHAI THAC CHIA LOTP NGANG NGHIENG
trong flieu kien dja chat ky thuat mo than Mao Khe
In the period of 2003-2006. all the horizontal and inclined lonwalls at Mao Khe Coal Company have been supported with hydraulic shields and to the year of 2007, they were replaced with hydraulic moving support XDY However, after the utilization time at the areas having thick and sloped coal seams, the hydraulic moving supports have revealed some disadvantages that need to be overcome. In this paper.
depending on the results from the evaluation of the real situation of the tongwall support works, the authors propose the supporting patterns for the longwalls and sublevel gate- ways as well as the face extraction and reasonable top coal recovery under the geological conditions at Mao Khe coal mine
TS TRl/aNG BU-C DU' ThS, T R A N T U A N N G A N Vidn Khoa hoc Cdng nghd Md - Vinacomin
ThS N G U Y £ N ANH T U A N ThS P H A M V A N D O N G Cdng ty TNHH MTV Than Mao Khd
Khodng sang than do Cdng ty than Mgo Khe qudn ly vd khal thac cd tru lugng cac via ddy ddc chilm khoang 43,5%
tdng tru lugng huy dgng vao khai thac (tinh d i n mue -150), tap trung d hai canh, cdnh Bic vd cdnh Nam. Tu nam 2003, d l khai thac phin tru lugng nay, Cdng ty than Mao Khe da dp dgng he thong khai thac chia Idp ngang nghieng (hope chia Idp bdng) su dung vl ehing thuy lyc dan kit hgp vdi xd hdp hoac gia thuy lyc di dgng. Viec dp dgng he thong khai thae nay da giai quyit dugc cac v i n d l : giam t i n thit than, nang cao san lugng khal thac, nang suit lao ddng vd muc dp an todn lao dpng so vdl cae hp thing khai thac via ddy die da dp dung trudc day Trong glal doan t u nam 2003 den nam 2006, t i t ca cdc 16 chg ngang nghieng tgi Cdng ty dugc chong glu bang vi ehing thuy lye gdm cgt ehing thuy lye dan k i t hgp vdi xd hop. Tu nam 2007 d i n nay.
thuc hien chi thj cua Tap dodn CN Than - Khodng san Vipt Nam (Vinacomin) v l han ehe dp dgng cpt chdng edt thuy lue dan kit hgp xd hop trong cdng nghe khai thac cd ha trdn thu hoi than noe, eac 16 chg khai thde ehia Idp ngang nghieng tai md than Mao Khe dwac chuyin sang chong giu bing gid thuy lye di dong logi XDY.
Qua thdi gian dp dung eho thdy, tai mgt s l khu vyc via ddy, die, than ed tinh chit mim yeu, vlpc su dyng gia thuy lue di dgng trong 16 chg da bdc Id cdc nhugc 6\em nhu: muc dp on dmh cua gid thap, vl chdng hay bj xd lech, khd dl chuyin, thgm ehi dd vi ching. Cde tdn tai tren lam anh hudng d i n viec tang nang suit lao dgng va san lugng khal thac Id chg.
Theo bao eao thuc hien khoi lugng mo nam 2011 va k l hoach san xult cac nam tiip theo, san lugng khal thde edc via die tu cdc Id chg dp dung he thing khai thac chia Idp ngang nghieng chilm tu 35 -;- 40% ting
sdn lugng khai thdc eua todn Cdng ty Do vay, de nang eao hgn nua hieu qua khai thdc cde via ddy, d i e bing sa d l cdng nghe khal thdc chia Idp ngang nghieng tgi Mao Khe, viee ddnh gia ting hgp cac kit qua da dat dugc d l t u dd nghien euu hoan thien ho chilu ching giu, quy trinh khai thdc vd cac bien phdp ky thuat an Id rit c i n thllt.
I. Hien trang va k i t qua dp dung cdng nghe khai thac Id c h g chia Idp ngang nghieng tai Cdng ty than Mao Khe.
Theo ddnh gid ting hgp, khu vuc cdc via d i e cua Mao Khe dp dgng edng nghe khal thac 16 chg chia Idp ngang nghieng id nhung khu vuc via CO dieu kien dja chat phue tap:
chieu ddy via biln dgng nhieu vd cd c l u tao phuc tap; dd vdch va dd try via trong khu vyc thay doi tu mdm d i n eung, cd nhOng khu vyc dd vach vd dd try via Id nhung I set kit rit d l trugt Id; tinh chat, dp eung cua than thay d l l phuc tap;
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Thong tin khoa hqc c6ng ngh# nn6
mu'C dg chua khi vd thodt khi eao. Tat ca cdc yeu t l tr6n gdy anh hudng va khd khdn Idn d i n edng tae khal thdc Id chg,
Trong nhu-ng nam qua, d l khal thac cae khu vyc via die, Cong ty da dp dgng chu y i u logi hinh cong nghp khal thde 16 dge via phdn ting vd sa d l cdng nghp khai thde chia Idp ngang nghieng, khiu than bang khoan n l min, dilu khien dd vach bdng phuang phdp phd hda toan phin, ehing tdng cudng guang khai thdc bing cpt ehing thuy lyc dan kit hgp vdl xa hpp hogc gid thuy lye di ddng.
Trong giai tu nam 2003 d i n nam 2006, t i t cd cdc 16 chg ngang nghieng tai Cdng ty duge chdng glu bang vi chong thuy lyc g i m cdt chong thuy lyc dan k i t hap vdi xa hop Glal doan tu nam 2007 d i n nay, thuc hien chi thj cua Tap doan v l viec han c h i dp dgng vl ehing edt thuy luc dan vdi xa hdp trong he thong khai thac 16 chg CO ha trin thu hdi than ndc, cdc Id cha khai thde chia Idp ngang nghieng dugc chuyen sang ching giO' bang gia thuy lyc di dgng loai XDY eua Trung Quic (hinh 1).
' Hi$n trang cong tac chong giu' 16 dQC via phan tang va gwang khau cua id chg chia l&p ngang nghieng.
- Doi vdl 16 dge via phan ting.
Trudc day, trong c6ng nghp khal thac 16 dpc via phan tang va cdng nghe khai thdc chia Idp ngang nghieng, cdc dudng Id dgc via trung gian dugc ching bdng thep CBn-17(22) tilt dipn hinh vdm, Id dpc via phan ting thudng duge chdng bang go tilt dien hinh thang va dugc
Hinh 1 Sa dd cdng nghd khai thdc. Id ldp ngang nghidng, chdng giir guang chong tdng cudng bdng khudn gd cat mdn 5 khdp. Song, do khu vyc cd chilu ddi theo phuang vd dp lyc md Idn, cac dudng 16 dge via phdn t i n g ehing bang go thudng bj nen bep: cae xd bj gay, cpt bj gay todc, trong qud trinh khai thdc, cdc dudng 16 nay phai ching xen lai rit nhilu iln (hinh 2). De gidm bdt c6ng tdc chong xen, Cong ty da nghien euu b6 tri edc 16 dpc via phan tang sang ddo bdm vdch via. Tuy nhien, khil lugng edng vpc ehong x6n, eung c l cho cdc dudng id khdng giam, ma cdng tac khai thac Id chg ggp rit nhilu kho khan, do khdng gian vi ching cuoi cung cug gugng 16 chg ngdeh thudng bi tgt Id ddn d i n 16 chg y i u . Cdng tdc thu hoi than todn bg guang khiu khdng hipu qua (day Id vj tri tap trung
dpc via phdn tdng vd Miai thdc dva khai thdc bdng gid thuy lyc di dgng
phin ldn than hg tran). Sau do, cdng ty da dp dyng ching tat ca cdc dudng 16 bdng thep v6m, ddnh khudn cdt m6n 5 Widp. De tgn thu edc vi ehing thep, trong qud trinh khai thdc dogn Id dpc via phan tang cua phgm vi nga ba vdi Id chg {guang khau) dugc chong chuyin doi san^
ching bang vi g l vd ddnh bo sung gdnh tdng cudng bang cgt ching thuy lyc dan - xd hop.
Vdi hg ehilu ndy, 16 dpe via phan t i n g ching ddp bao (dudng Id cao thoang, I n dinh) phyc vy t l cho cdng tdc thdng gid, v|in tai than va di lai trong qud trinh khai thac cua mil phan tang.
- Doi vdi Id chg (guang khiu ngang nghieng):
Trong giai tu nam 2003 din nam 2006, t i t ca cdc Id chp ngang nghieng tgi Cdng ty
KHCNM s o 12/2012 * CNKT HAM LO
Thong tin khoa hQc cong ngh^ m d
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Hinh 2. Hidn trang vd hd chiiu chdng Id doc via phdn t^ng
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Hinh 3. Hd chidu chdng Id doc via phdn ting vi trf ngd ba Id cha ngdch (1, 2}
duac ching gliJ' bing vi ehing hop. Tu nam 2007, cdc 16 chg thuy lyc g i m : opt ching thuy khai thde chia Idp ngang lyc dan (bam djch trong hogc nghidng duge chuyin sang bam d.ich ngodi) k i t hgp vdi xd ching glu bang gid thuy luc di
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dpng eua Trung Quic, Den nay, h i u h i t eac Id chg dp dgng cdng nghp nay deu su dyng gid thuy lyc dl dpng loai XDY cua Trung Quie.
- D l i vdl ngd ba 16 dpe via phan ting vdi 16 chg (hinh 3):
I Vj tri ngd ba Id dgc via phan t i n g vdi 16 chg, d l l vdi edng nghp khai thae su dgng vi ehing thuy lyc dan xd hop dugc ching tang cudng bang ba c§p vi ehing, moi cap vl ching bao gom: 2 xd hgp (xd ' CO chilu ddi 2,2 -^ 2,6m) vd 6 cpt thuy lyc dan. Vi tri dudi xa ddnh b l sung mpt gdnh tang eudng bing xd gd vd ba edt thuy lyc dan. He thing gom ba cap vi vd gdnh tang cudng se duac di chuyin theo tiin dp khai thde d guang khiu.
Vi tri nga ba Id dge via phan t i n g vdi Id chg, d l i vdi cdng nghe khal thdc su dung vi ehong gid thuy lyc di ddng duge ehing tang cudng bing hai d i n ba gia ehing. Vj tri dudi gid danh bo sung mdt gdnh tang cudng bang xd gd vd ba edt thuy lyc dan. He thing g i m ba vi gia va ganh tang cudng se duge di chuyen theo t l l n dp khai thdc d guang khiu.
• Tong hQp mot so chi tieu KTKT cua cong nghe khai thac Id chqf chia l&p ngang nghieng dugc trinh bay trong bang 1.
II. Danh gid ting hgp kit qua dp dung cong nghe khai thdc 16 chp' chia Idp ngang nghieng tai Cong ty than Mao Khe.
* Ve ky thuat. Cdng nghe khai thdc chia Idp ngang nghieng su dung edt chdng thuy lyc dan k i t hgp vdi xd hop vd gid thuy lyc dl dgng oiling glu Id chg da dgt dugc mgt s l ehi tieu kinh t l ky thugt
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Thong tin khoa hpc cong nghg mo
Bingi
TT
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Ten mdt so chi tieu
S6 16 ChQ' khai t h i c trong nam Chi^u cao phdn iing khai thdc Chi^u cao kh^u gu'ang 16 Cher Chi4u cao Ihu h6i So phan l^ng khai thacd6ng th6i T 6 C (36 li^n gu'ong San l u ^ g khai thdc khu vyx: 16 che C6ng suat khai thdc khu vyc 16 cho Ndng suat c6ng nhdn 16 chp"
Chi phi thuoc no Chi phi kip no Chi phi g6 Chi phi ddu nhu tuang Chi phi lu'6i thSp Chi phi met 16 chuan bi Ton that cong nghd
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m/lhdng t^n/thdng t4n/ndm tin/c6ng kg/10'tan cdi/10'tan m»/10M4n kg/IOMan kg/10= tdn m/10»tan
%
Khdt luyng cho Id chgt
Cdt TLB, xihip
4 6,8+5
2,2 4,6 12,8
1 + 3 43,8 5,466 66 589
3,6 127 282 5,4 170 490 33,6 37.2
thuy tycdl ding 12 13.2
2.2 11 3,0 26.2 7.977 96 727
3.8 130 290 3.9 138 272 21.1 31.7 tuang d l l tit, ndng s u i t vd
cdng suit Id cha cao vd on dinh, ehi tieu met 16 chuan bj va t i n thit than cua cdng nghe chip nhgn duge so vdi edc md trong Vinacomin Ddnh gid chung mdt s l uu, nhugc diem khi dp dgng ede logi vi ehong cho thiy:
- Vi ehong thuy lyc dan, xa hop nhe, ea dgng han so vdi gid thuy lye trong vipe eung eo, xu ly su c l trong qua trinh khai thdc Id chg (ca d Id dgc via phdn tang). Doi vdi cdc khu vue via cd c l u tao phue tgp, than m i m , viec ching gii> 16 cha cung nhu viee eung co gia cudng vj tri nga ba 16 chg vdi
16 dge via phdn ting thugn Igi han, khdng gian Id chg thdng thoang, tgo dieu kien thugn lgi cho cdng tae khiu guang eung nhu thu h i i than. Nhugc diem trong vipe su dyng vi ching thuy lyc dan, xd hgp Id khi 16 chg phai dung khai thac Idu ngdy, 16 thudng hay bj nen y i u , phai cung eo nhieu.
- Vi ching gid thuy lyc di dpng kh6ng ca dgng so vdi cpt thuy lyc xd hgp trong vipe cung c l , xu ly sy c l trong qua trinh khai thdc 16 chg (ca d 16 dpc via phdn ting). D l i vdi cac khu vyc via c6 c l u tgo phuc tgp, than m i m , vlpc ching giu' 16 chg cung nhu vipe cung c l gia
cudng vj tri ngd ba 16 chg vdi 16 dgc via phdn t i n g phdc tgp, n h i t Id trona cdc trudng hgp phai cung cd, kich ndc. Song, vdi cdc khu vyc via c6 than cung, chilu ddy ft biln d|ng, Id chg ching bing gid thuy lyc di d i n g chdc chan han so vdi ching cOt thOy lyc, tgo dllu ki^n thu h i i than t i t han. Khi 16 chg phdi dung khai thdc lau ngdy, cdng tdc cung c l it han.
* VS kinh tS: Tr6n ca sd kit qud dp dyng cdng nghp vdi hai logi v^t li^u ching guang 16 chg. qua tinh todn kinh t l , cho thiy, cdng tdc khai thdc dp dgng cdng ngh$ ndy da thyc sy mang lgi hi$u qua cho Cdng ty than Mgo Kh6 (bang 2)
* Vi cong tdc an toan: Ket qua t i n g hgp cdc tai ngn lao dpng xay ra trong qud trinh khai thdc dp dyng 3 ndm gin ddy, tie 2009 + 2011, cho thiy, trong thdi gian dp dyng edng nghp khai thac 16 chg chia Idp ngang nghieng tuy khdng gay tai nan c h i t ngudi song co xay ra 25 vy tai ngn lao dpng, trong dd cd 14 vg tai ngn muc dp nhp vd 11 vy tai ngn muc dp ngng.
Ndm 2009 xdy ra 5 vy tai nan lao ddng muc dp ndng. Nam 2010 xay ra 7 vy tai ngn lao dpng, trong do 5 vy tai ngn a muc dg nhp va 2 vy tai nan a muc dgn^ng. Nam 2011 xayra 13 vy tai ngn lao dpng, trong do 9 vy tai ngn d muc dp nhp va 4 vy tai ngn d muc dp ngng (thdng 5/2012, cd xay ra mpt vy tai ngn chit ngudi).
Phan tich vj tri, diln biln cae vy tai nan xay ra cho thiy, trong s l 26 trudng hgp tai ngn ( k l ca 1 vy tai ngn chit ngudi nam 2012) cd 4 vy tai ngn xay ra trong cdng tdc ddo, ching x6n 16 chuin bj (cdng dogn dyng vi ching); 5 trudng hgp
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Thong tin khoa hpc cong nghe m o
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Bang 2
TT
1 2 3 4 5 6 7 8
Ten cic chi tieu
Gia thanh khai thdc 16 chp"
Gia thdnh m6l tdn than tidu thu T6ng mijc dau t u Gia bdn than binh qudn San luong 16 chg"
Doanh thu ndm
Chi phi san xuit kmh doanh ndm Lai nhudn tru'oc thue ndm
Don vi
d/t5n d/tan 10»a6ng
a/tan tin/ndm lOMong 10'dong 10»a6ng
Gii trj Ldchg' chong CTL 283.580 1.448,326
2.677 1 489.535
65.590 91 084 88.564
2 520 Ld chg'
chdng GTL 269.914 1.412.015
6 218 1.489.535
95.730 132 940 126.021 6.919
Hinh 4. Hien trang vd hd chidu chdng Id sir dung gia thuyli/c di ddng XDY
xay ra trong cdng tdc khai thdc Id chg (tai than 1 vy, edng tdc chuin 13! 2 vg, cdng tdc thu hll than 1 vd); trong cdc cdng vipe khdc nhu v$ sinh cdng nghipp, v^n chuyen vdt tu vd di Igl trong 16 xay ra 17 vy. Nguyen nhdn cua cae vy tai ngn hiu h i t Id do clng nhdn vl phgm quy trinh va cde bipn phdp an todn cua cdng nghp, do cdng nhdn chu quan, thilu thdn trgng, quan sdt trong qud trinh v|in ehuyin vgt tu.
* Mdt s6 ton tai cua hd chiiu chdng giQ', khai thdc Id chg chia l&p ngang nghieng tai Mao Khe.
1. D l l vdi trudng hgp guang 16 chg ehong bang gid thuy lue vd phgm vi ngd ba ching tdng cudng cung bang gid thuy lyc XDY (hinh 4)
- Hg chilu ching guang khau Id ngaeh bang gid thuy lue XDY, khoang each giua cac gia 1,0m (tinh tutam gid). Theo ddi trong qua trinh khai thae 16 chg cho thiy, d l i vdi edc khu vuc via, than ed tinh ehit m i m y i u (than cdm mim bd), eacvi ching gid thudng bj xd dat, thgm ehi, ed nhilu trudng hap d i n d i n d l vi chong, Idm anh hudng r i t nhieu d i n edng tde khal thac Id chg. Qua phan tieh, edc nguyen nhan anh hudng la do than mim, trong qua trinh khai thac khiu ching, guang Id cha hay bl tut ndc
• Mat khde, de giu ndc trong hd j ehilu su dung t i m chen bing j ludi B40, Viec b l sung them I chen ndc dd ludi thao tde rit khd khan nen ndc 16 khdng j phang thudng xuyen cd eac bgng than (ndc yiu). Cung do than m i m y i u nen cdt chdng bj I nen lun Idm cho cdc egt ehing gid thudng khdng ed dp lyc, khdng gian lam viec cua guang
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Thong tin khoa hgc c6ng ngh$ m6 16 chg thap gdy khd khan chocdng tdc khai thac cung nhu thu hoi than, D l l vdi cdc khu vuc via, than cung han, cdng tde khiu guang thudn Igi han.
Trong qud trinh khai thdc chong giu', guang Id chg It xdy ra cdc hipn tugng tren, ddn d i n khdng gian Id chg cao thodng tgo dllu kl$n t i t eho cdng tde khiu guang cung nhu thu h l l than ha trin
- Hg chilu ching dogn Id doc via phdn ting vj tri nga ba (ehing tang cudng bing hai vl gid) thudng bj nen bpp, chilu eao 16 thip, gay rit nhilu kh6 khdn cho edng tdc di chuyin vdo gugng khiu 16 ngdch vd gay kh6 khan cho cdng tdc thu hdi than d Id dge via phdn t i n g Phan tich cho thiy, cdc nguyen nhan ddn den tinh trgng tren nhu sau: do tinh chat eua than Mao Khe mem hoac cd khu vyc than eung nhung ddn, nen trong qua trinh ddo Id cung nhu ching xen, ehuyin d l l hg chilu phan than tren ndc Id dgc via r i t de bj tgt Id lam cho dudng Id phai chen kich ndc nhilu. Khi khiu guang d chu ky mdi, viec di ehuyin vl ching gid d Id dpc via phdn t i n g (vj tri nga ba vdl 16 chg) do phai dd va chit tai cho gia trong hdnh trinh di chuyin, nen phin than tren n6c 16 bj nen vd, ndc Id y i u , hay xay ra hipn tugng tyt Id. Mat khdc, trong mdi chu ky khai thdc, sau khi khiu ching guang ld_ ngdch luong mdi, vlpc thu hll than ha tran duge tien hdnh theo trinh tu: thu h l i than doan 16 ngdch, sau do thu hll than d 16 dpc via phan ting, d vi tri thing tuyen vdi dudi gid Id chg. Trong qua trinh thu h l l than d 16 dgc via phdn t i n g phin than ndc sap d l thu h l i thudng xuyen sap trdn lan cd
sang n6e 16 dgc via vj tri ngd ba (vj tri gid ehing tdng cudng l l i di d l vdo Id chg), th$m chi Idm d l vl ching gid, gdy m i t an todn trong qud trinh thu h l i , mit III dl vdo 16 ngdch.
CDng do 16 phdn ting bj ndn thip, vi^cdl chuyin vl ching gid d 16 chg ngdch, vj tri tiip gidp vdl 16 dgc via khd khdn, th§m chi khdng thyc hl$n di ehuyin dugc do gia bj xd vudng vdo d i u xd cua vi ching Id dpc via.
2, D l i vdi trudng hgp guang 16 chg ching bang cdt thuy lyc dan k i t hgp vdi xd hdp vd pham vl ngd ba ching tdng cudng cung bdng cgt ching thuy lyc k i t hgp vdi xd h|p (hinh 5).
- Hp chilu ching guang khiu 16 ngdch bing c|t thuy lyc dan k i t hgp vdl xd h|p (vl ching 16 chg Id edc cdp vi g i m hai xd hgp vdi 6 cpt thuy tyc dan), khoang cdch gi&a cac cap vi Id 0,8 -^ 1,0m (tinh tu tdm vl) Theo ddi trong qud trinh khal thdc 16 chg cho thiy, d l l vdi cdc khu vyc via than cd tinh chit m i m y i u (than cdm m i m bd), cdng tdc ching giQ- 16 chg bang cpt thuy lyc dan k i t hgp vdl xa hpp t i t han ching bdng gid thuy Iyc di dpng, han c h i dugc phin Idn cdc sy c l xd dgt, d l vi ching.
Khic phyc dugc tinh trgng ndy Id do trong qud trinh khai thdc, d l giu ndc, hp chilu su dyng tam chen gd k i t hgp vdi ludi B40, Vlpc b l sung thfim ch^n noc dd ludi da glCp dugc ndc 16 ludn phang, hgn c h i tinh trgng tgo cac bgng than. Ndc 16 I n djnh tgo dllu kipn ching giCr khdng gian 16 chg t i t han, 16 chg cao thodng va cung tgo dilu kipn cho edng tdc thu h l i than t i t han. .
- Hp chilu ching dogn 16
dpc via phdn t i n g vj tri ngd ba:
D l i vdi dogn 16 dpc via phdn t i n g vj tri ngd ba ching tang cudng b i n g ba c3p vl ching c|t thuy lyc dan xd hpp cung cd bj n6n, lun. Phdn tich cac nguyfin nhdn d i n d i n tinh trgng ndy cOng tuang ty nhu trydng hgp chdng tdng cudng bing gid thuy lyc di d|ng XDY.
Song, do h | chilu ching giii b i n g cdp xd hdp, vi#c di chuyin vi ching dfi ching glO ngd ba theo trinh t y ti>ng ve mdt dfch d i e (cdc thao tdc tuang t y ching b l sung tdng cydng vi ching) nfin tgo dilu kifin cho phin ndc 16 durgc I n djnh han, hgn c h i dugc vd tgt n6c. Mdt khdc, cdng tdc ndy co t h l t i i n trudc nga ba to chg mpt khoang each nhit djnh nen khdng gian nga ba dam bao cho cdng tac di chuyen vao guang khal thac Id ngdch va cung tgo d i l u kipn cho cdng tdc thu h l i than d 16 dpc via phan tang, hgn c h i Idm do hogc xd dgt vi ehing. Tuy nhifin, trong qud trinh thu hli than d Id dgc via phdn ting, p h i n than noc sgp d l d khu vyc thu h l i cung thudng xuyen sgp do trdn lan ca sang vj tri nga ba n6c 16 dpc via (vj tri ching tag cudng vdo 16 chg)
* Nh$n xet Qua danh gia tong hgp k i t qua dp dyng cdng nghfi khai thdc chia Idp ngang nghieng tgi Mgo Khfi, co mOt so nh$n xfit chinh nhu sau:
- Ody Id logi hinh cdng nghp dugc dp dyng chu y i u 6e khai thac cho cac khu vyc via day, d i e cua Cdng ty than Mgo Khe San lugng than khai thac hang nam r i t Idn, chilm 35 -^ 40%
trong t i n g san lugng khai thac cua todn mo. Cde ehi tifiu kinii t l ky thuat cua cdng nghp nhu san lugng, ndng suit lao ddng dgt cao vd on djnh han so vdi
KHCNM s o 12/2012 * CNKT HAM LO
Thong tin khoa hpc cong ngh$ m o
Bojnvitiipyfrn tliiymBilllllhtiang(10-r15rii) - ^ ^ CjlTLB'nahBi
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Hinh 5. Hidn trang vd hd chidu chdng Id sCe dung cdt thuy iuc dan, xd hdp nhit djnh. Cae edng tdc an cdc cdng ty cung ap dung khai
thac bang cdng nghe nay vung Quang Ninh. Cac chi tieu v l chi phi, cung nhu chi tieu vfi t i n thdt than giam. Qua tinh todn kinh t l , hang nam, cdng nghp da mang Igi hifiu qua kinh t l
toan dugc dam bao. Vdi edc kinh nghiem dugc due kit Igi sau nhilu nam khai thac dp dung, cd thfi khang dinh, cdng nghp khai thac chia Idp ngang nghlfing chdng giu bang vi
ching thuy lyc (cpt thuy lyc dan kit hgp vdi xd hop va gia thuy lye di dpng XDY) la mgt trong nhung edng nghe khal thdc truyen thing eua Cdng ty than Mgo Khfi ap dgng d l khai thdc cdc via than ddy, die,
- Mac du kit qua dgt dugc tuang doi tot, song trong qua trinh khai thdc thye te vdn cdn cd mgt so t i n tgi ein phai tiip tgc xem xet, nghifin euu va hoan thipn, dgc bipt la vgt Iipu ching glu* cae 16 chg vdl mdi dilu kipn via eung nhu vdi mil loal via than ed tinh chit khac nhau; hp chilu ching Id doc via phan ting, dac biet la hg ehilu ching ehuyin doi 16 ehong vi thep v6m sang vi go hinh thang de thu hdi vi ehong thep; hd chilu ching tang cudng Id dgc via phan tang, pham vi vi tri nga ba vdi Id chg ngdch; edng tae to ehuc khiu guang Id cha vdl viee thu hoi than ndc sau ha trdn cung nhu viec thu h l l than ha trin d phin Id chg ngaeh vd d Id dge via phan ting, ding thdi, tiip tgc xay dung vd hodn thien cac quy trinh, bien phdp ky thuat an toan eua cdng nghe eho phu hap vdl dllu kien dia ehit ky thuat mo cua Mao Khe.
111. Dfi xult ho chilu chdng giu 16 chg, 16 doc via phan tdng va to chuc cdng tdc khdu guang - thu hli than ha trdn hap ly trong difiu kien dja chdt md Mao Khe.
Trfin ea sd phan tieh cae uu difim cung nhu mdt s l t i n tai cua eac hg ehilu ching giu 16 chg chia ldp ngang nghieng hd chilu ehong glu trong khai thdc 16 chg chia Idp ngang nghieng dugc d l xudt nhu sau:
* Bdi v&i 16 doc via phan tang: L6 dgc via cua eae phdn t i n g khai thac trong qua trinh
KHCNM s o 12/2012 * CNKT HAM LO
Thong tin khoa hgc c6ng nghg m 6
Hinh 6 Hf chiiu khai thic vi ching Id sd dung gii thdy luc di ddng XDY
aao iIu'O'c chong theo tilt di#n 0,7m/vl. danh b6 sung ganh hinh vdm. si> dung thep
CBn-22. dien tich tidt dign dao So = 7.2m2. tier dg 0.7m/vi. Khi ti§n hanh khai thac. doan 16 dpc vfa phia tru'O'c gu'ang khau 16 che tu" 10+15m du-^c ch6ng
tang cirang, ganh tang cu'O'ng la cpt chong thuy ig'c do'n ket hpp xa hpp, dpc theo chieu dai xa go bo tri ba ganh (hai ganh bo tri sat dau cpt va mOt ganh d giCra xa), thep chl^u dai chuyen doi hp chilu thanh vi du-ping 16, cac ganh diiqic b6 tri ch6ng gd tiet dien hinh thang, noi tiep nhau. 0 ph^m vi nga dien tich dap Sd=6.4m^. tien dp ba 16 dpc vfa v6i 16 chp', cac
ganh du'p'c b6 tri tu'p'ng tif, spng cac xa ganh n6i tllp nhau du'pc b6 tri ch6ng chip 0.8m (vd'i tru'6'ng hp'p gu'ong 16 chp ngach ching bang gia thuy Ig'c di d|ng) va 1,0m (vd'i trgpng hp'p gu'P'ng 16 chp' ngach ching bang c|t ching thuy ig'c San k i t hp'p xa h|p). Vi tri thu hli than 0' Id dpc vfa phSn ting, ching b i sung thdm m|t ganh tang cu'dng cho ega thdp (gdnh c6 xa b i n g g i va ba c|t thuy lu'c dpn). Trud'ng hp'p cdc doan Id dpc via phan t i n g do trong qga trinh dap Id b| tgt ndc phai chdn kich nhilu hp$c ndc 16 y i u . v i l e thyc hi$n ching chuyin d l i sang h i chilu ching vl g i khd khSn, khdng dam b i o an tpan, spng tilt di#n van dam bao phge vg ccng tac khai thac, chp phep khdng thg'c hien cdng tac ching chuyin dli thg h i i vi ching thep (khdng tan thu cac vi ching thep).
Pham vi nga ba vd'i Id chp cua d09n Id ndy dupe ching bo sung hai ganh tang cgdng (ganh g i m cpt ehing thuy Igc dpn va xa hOp), vi tri ganh dd sat du'd'i gdng d i u cpt cua vi ehing thep.
* Bdi vd'i guang khdu Id chg ngich (Id chiii ngang nghieng):
Trud'ng hpp dpi vdl cac khu vuc via, than cd tinh chit mim y i u hpae edc khu vgc k l ca than cung nhung bi phay pha vd nhdu hoac khu vuc cd anh hud'ng cua nud'c (nhung mgc dp anh hud'ng vdn dam bao t l l n hanh khai thde Id chp), nhg khu d i e cdc vfa than thuoc canh Bac, lua chpn ap dgng hp chilu chong 015 guong Id chp bing c i t chdng thdy Igc don k i t hpp vdi xa hdp, chen ndc 16 bang g i k i t hpp vd'i ludi B40 (hinh 6). Tnidng hpp d i i vdi cdc khu vuc via than cd cu'ng hon (than antraxit vd ban
KnC^M s o 12/2012 * CNKT HAM LO
Thong tin khoa hoc cong nghj m d
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Hinh 7. Hd chidu khai thdc vd chdng antraxit), it hodc kh6ng bj anh hudng cua nude nhu cdc via than thugc cdnh Nam, lya chpn dp dgng hg chilu ehing giu*
guang Id chg bang gid thuy luc di ddng XDY, chen noe 16 bang ludi B40 (hinh 7)
* To chirc cong tac khau guang va thu hoi than ha tran trong Id chg.
Qua mdt s l tdn tai eua hd
Id sir dung cdt thuy luc dan, xd hdp ehilu ehing giu cung nhu cdng tde thu hoi than hg tran trong thue t l khal thac Id chg, nhdm thyc hien d l tdi d l xuat glai phap b l tri edng tac khiu guang va thu hoi than ha trin trong 16 chg nhu sau: Trong mdi ehu ky khal thae (tu khi khiu gugng, ehing giu-, ha trin va thu hli than noc), b l tri khiu ehing hai luong guang, sau dd
mdi tiin hdnh hg trin thu hli than ndc, Cdng tac thu hll than hg trin dugc thyc hifin theo glai phdp sau Theo ehilu ddy via, tlln hanh thu hll than d doan 16 chg ngdch tarde (phia vach via trude), sau d6 thu hli than d 16 dpc via (phia trg via sau) Theo phuang (theo chilu tlln 16 chg), thu hll than d 16 chg ngach vugt trudc d 16 dpc via phdn ting mdt tlln dp thu hoi (2,0m d l l vdi guang 16 ngdch chong bing cpt thuy lyc dan xd hOp vd 1,6m d l l vdl guang 16 ngach ching bang gid thuy lyc dl dpng XDY). Trfin ca sd do, dilu chinh bo sung vd hodn thipn quy trinh khai thdc cac 16 chg,
IV. K i t luan:
Danh gid ting hgp kit qua dp dung c6ng nghp khai thae 16 chg chia Idp ngang nghieng mo than Mao Khe cho thiy, cdng nghe da eho cae ehi tifiu kinh te ky thudt tit, nang suit vd cdng suit 16 chg cao, giam ton thit than, mang Igi hifiu qua kinh t l , dam bao an toan va cai thien difiu kifin lam viee eho cdng nhan trong khal thac via die, Tuy edn c6 mgt s l t i n tai nhit dinh, song nhung glai phdp cdng nghfi da duac de xult se giiip Cdng ty than Mao Khfi khai thdc cde khu vue via die duge tit han /
Tai lieu tham khao:
1. Bdo cao "Danh gia hien trang va de xuat ho chieu chdng giir 16 chg hgp ly cua he thdng khai thac chia l&p nganp nghieng trong dieu kien dia chat ky thuat mo t^i Cdng ty TNHH MTV than Mao Khe". Vifin Khoa hoc Clng nghfi Mo - Vinacomin, nam 2012 2, Tdi lieu tong hgp vfi k i t qua dp dgng cdng nghe khal thdc 16 cha ehia Idp ngang nghieng, giai doan 2004 ^ 2006 vd giai doan 2009 ^ 2 0 1 1 , do Cong ty than Mao Khe eung cap, thdng 7/2012.
KHCNM S 6 12/2012 * CNKT HAM LO
