KET QUA KHAI THAC LO CHO CHONG COT THUY LUC DON KET HOP von XA misp TRONG D I E U K I E N V I A DAY TRUNG B I N H , DOC 35 ^ 45°
TAI mOT so MO HAM LO CUA TAP DOAN TKV
In 2013, Hong Thai Coal Company has coordinated with ThS. TRAN TUAN NGAN Institute of Mining Science and Technology (IMSAT) in study TS, PHAM TRUNG NGUYEN and development of the mining flowsheet for the longwall Vi$n Khoa hge Cdng ngh$ Md- Vinacomin under the diagonal and graded stope fomi, using single hydraulic
supports with jointed beams for the medium inclined coal seams Bien t$p: TS. Dao Hong Quang with the angle of 350 - 450. replacing timber supports. After
Its pilot application with efficient results, this technology has been widely applied to other longwalls at Hong Thai Coal Company as well as the ones at Uong Bi and Quang Hanh coal companies. This paper refers to the results from the application of the mining technology for the longwall of the medium Inclined coal seams with the angle of 350-^45°, using single hydraulic supports with jointed beams at some underground coal mines belonging to Vinacomin
1. So* dd cong nghe khai thac 16 c h g chan khay x\&n cheo chdng cot thuy luc d a n k6t hgp v 6 i xa kho'p
Sa d6 c6ng nghe khai thac guang 16 che chan khay xien cheo dugc ap dung pho bi4n 6' Trung Quoe d6 khai thac cac via co chi6u day mong den trung binh, g6c doc 35 -^ 55°, kh^u than bang khoan n6 mln, chong giu 16 cha b^ng vi chong cot thuy luc dan - xa khap hoac vl chong go. Ban ch§t cua sa do c6ng nghe khai thac la guang 16 cha duac bo tri thanh cac bac Chan khay g6m cac doan thing va cac doan xien cheo theo huo'ng doc via vo'i cac phuang an nhu d i u 16 chg t i i n truo-c ho^c chan 16 chg tiln trud'c d& giam goc doc 16 chg (goe doe gia eua 16 chg) so vo'i g6c doc that cua via. Qua trinh khai thac 16 chg, khiu chong o* nhi>ng vi tri dogn guang thing, eon nhOng vi tri doan xien cheo (doan chuyen tiep giiJa cac vj tri khau) de tao dilu kien eho eong tac di lai va vgn tai than, dong th6'i nang cao do on djnh vi chong khi lam vi$c 6' nhung khu vuc via c6 dp doc 16'n
Khi nghien cuu ap dung vao Viet Nam, doan xien cheo cua 16 cha dugc cai tien b6 tri thanh cac bac chan khay d l tao dilu ki0n cho c6ng tae chong giO thuan Igi cung nhu hgn e h l 16' guang 16 ehg. Guang 16 ehg chan khay xien cheo chong bang cpt thuy luc dan ket hgp vgi xa khap logi HDJB -1200 ap dung tai Viet Nam la
guang 16 chg dgng bac chan khay c6 dau 16 chg khai thae tiln trud'c chan 16 cha.
Oac diem ciJa guxyng Id chg nhw sau:
- Theo chilu d i e cua 16 ehg, toan tuyin guang dugc chia thanh cae dogn, trong m6i dogn bao gom doan chan khay khiu va dogn chuyen tiep (doan chuyin tiep bao g l m cac chan khay). Theo phuang, chieu rpng m l i chan khay bang t i l n dp cua mpt vi chong (chieu dai xa khap 1,2m).
+ Chan khay khiu: La doan 16 cha khiu, chong trong moi ca san xuit. Chilu dai theo huo'ng doc cua khay khau blng chilu dai khiu dmh muc (kha nang khiu ching guang 16 chg) cua mpt cap khiu hoac mpt nh6m khiu trong m6t ca va chilu dai m6t chan khay chuyin tilp.
+ Cac chan khay chuyin tilp: La cac chan khay duge b l trf giij-a hai chan khay khiu trong 16 chg, nhim nSng cao muc dp an toan cho cong nhan trong qua trinh khai thac. Mat khac, d l du ph6ng chCra than guang trong cac tru6'ng hgp cac khay dang khiu o* vi trf phia duo'i bj ach t i c hogc su CO d l tranh phai dung c6ng tac khiu guang cua khay khau tren Chilu dai theo huang doe cua moi chan khay chuyen tiep tu 3,2 -^ 4,0m, so lugng cac chan khay cua doan chuyen tilp tiF 1 -^ 3 khay, tuy thupc vao buac sap do cua da vaeh true tiep.
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- Theo phyong, chieu rong Id che chong giQ' gdm ba ludng; luong gu'ang, ludng g^n gyong va ludng bao vd. O' luong bao vd, mdi vi tn dau cac Chan khay theo chieu doc tir tren xudng dyoc chdng tang cyd'ng mot cui Ion, cac vi tri khdng tang cudng bdng cui len dyoc danh bd sung bang hang ganh tang cu'dng (ganh bang xa gd cot thuy lyc don).
Cong (ao chuan bj: Khu vyc duoc chuan bi theo so dd edng nghe khai thac cdt dai theo phuong, khiu dat bao gom; Id doc via thdng gid, Id doc via van tai va Id thyong khd'i dilm. Chieu cao dirng cua tang khai thac tir 40 + 60m, tiiy thude vao gdc ddc eua via ma chon chieu cao tdng eho phu hop, sao cho chieu dai Id che theo hydng ddc tir 70 -^ 80m.
Cdng tac khai thic id chi?: Cdng tac Id cho dyoc tien hanh qua ba giai doan; giai doan 1 lap dat vi chdng vao Id cho, khai thac tao thanh cac bac Chan khay cua gyong Id chg theo thiet ke.
Giai doan 2, khai thac khiu chong thyong ky gyong id eho dang bac chan khay xien cheo.
Glai doan 3, l<hai thac ket thuc gyong Id eho.
Giai doan 1: Lap dat vi chdng vao Id eho, khai thac tao thanh cac bac chan khay cua gyong Id cho theo thidt ke. Trudc khi lap dat cot chong thuy lyc don xa khdp vao chong giif, Id cho phai thyc hien xong cdng tac pha hda ban ddu. Sau khi lap dat xong cac vi chdng vao Id cho, tjin hanh khau chdng d l dya Id cho tir dang thing vd dang chan khay xien cheo cd dac diem gyong Id cho nhy md ta tren Qua trinh dya Id cho tir dang thing vh dang chdn khay xien cheo theo so do dyoc lap cho tirng Id cho.
Giai doan 2; Khai thac Id cho chan khay xien cheo. Sau khi tao xong gyong khiu dang bac Chan khay xien cheo, tien hanh khai thae thudng ky Id cho Cdng vide duoc tien hanh nhy sau;
- Bd tri eac cap khau gyong Id eho ddng thdi tai eac chan khay khau theo sudt chilu dai Id eho, mdi chan khay khau bd tri mot cap (hoac mdt nhdm 3 cdng nhan). Trong mdi chan khay khau, theo chieu dai dyoc khiu theo timg doan tir tren xudng theo chilu ddc, doan phia dudi khdng khai thac va de lai tao thanh bac chan khay chuydn tilp mdi (doan nay cd chieu dai bang chieu dai cua chan khay chuyen tilp).
- Cae cdng vide trong moi chu ky khau, chong
tai dc doan chan khay dygc t i l n hanh theo cac bydc; khoan |5 mln gyong; nap, n6 min - thdng gid; tai than, dyng vi chdng d l chdng giii' gyong Id che; thao chuyin, x l p mang tryetsang ludng m6i; chuyen ganh tang cyd'ng, hole chuyin, x i p cui len, thu hdi vl chdng ludng phS hda.
- Sau moi ludng k h i u gyong, v| tri cac chdn khay khau va cac chSn khay chuyin tilp djch chuyen d i n len phia d i u Id che va k i t thOc lln lyet cac khay khau, dong th&i tao thanh cac khay khiu va cac khay chuyin t i l p mdi tir phia Chan Id ehe. Cdng vi#c khai thac direc dyoc liln hanh tyong t y cho d i n khi phan d i u Id che tiln d i n vj tri dirng khai thac cOa Id che, khi do, kit thuc giai doan 2.
Gia; ffo^n 3; Khai thdc k i t thuc gyeng Id che Tiiy theo hien tt?ng cua Id che. vide khai thac kit thuc gyeng Id che cd t h l t i l n hanh theo hai each nhy sau;
- Khau chdng t i l p dya gyong Id che cdt thuy luc don xa khdp tir dang chan khay xien cheo ve dang gyeng khiu thing. Sau dd, thye hien chdng chuyin ddi hd chilu sang vi chdng gd de thu hdi thuy lyc don xa khdp.
- Thyc hidn chuyin doi hd chilu chdng sang vi chdng gd d l thu hol thuy lyc don xa khdp, sau dd, khai thac dya Id che ve dang thing, kit thuc cdng tac khai thac Id che.
Cdng tic van tai: Than khai thac tir Id eho dyoc van tai bang mang tryet xuong mang cao d Id van tal chdn che, sau do, theo hd thong vSn tai Chung cua khu vyc dya ra ngoai mat bSng.
Cdng tic thdng gid: Thdng gid cho Id chd dyec thyc hidn theo se dd thdng gid ehung cua khu vyc. Gid sach qua Id doc via vdn tai len cung cap eho Id che. Gid thai tir Id che qua Id dpc via thdng gid rdi hda vao mang gid chung va duec dya ra ngoai.
Se dd cdng ngh? khai thac gyeng Id chd Chan khay xidn cheo sy dyng vl chdng cdt thuy lyc den k i t hep xa khdp, dyec the hien tren hinh 1.
2. K i t qua cong tac t r i l n khai ap dung cong nghe
Trong nhOng nam qua, Vidn Khoa hpe Cdng nghd l«ld da phdi hep vdi cac cdng ty than Hdng Thai, Mao Khe, Udng Bl, Quang Hanh nghien ciru va dua vao ap dyng thu- nghidm trong thyc
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lyc don k i t hop xa khdp dyec t i l n hanh tir thang 6/2013, den nay da ap dung dyec 3 nam. Trong thdi gian ap dyng, Cdng ty khai thac d via 18, khu Trang Khe va via 47, khu Hdng Thai. San iueng khai thac dyoc tir cac Id che la 720.900 tan (gdm cac Id cho cua via 10, 12, 18, 47).
- Ddi vol Cdng ty than Quang Hanh; Cdng tac triln khai ap dung cdng nghd khai thac Id che chan khay chdng cdt thuy lyc don k i t hep xa khdp dyec ap dung tai via 6a, khu Nga Hai va t i l n hanh tir thang 10/2014. Sau khi khai thac hai thang. Id che thoai d i n , gdc ddc dydi 35°,Cdng ty da chuyin sang khai thac Id che gyong thing. San lyeng khai thac dyec tif Id cho 12.920 t i n .
- Ddi vdi Cdng ty than Udng Bi; Cdng tac triln khai ap dung cdng nghe khai thac Id che chan khay chong cdt thuy lyc don k i t hep xa khdp dyec ap dung tai via Hinh 1. Sa di cdng nghi khai thic guang Id cha dang phdi hap giira xiin Trann Kho chiovichiabicchinkhaysirdungvichdngcdtthuylucdankithopxi ^'^^°i-^ " ' " " " " a
khOp te cdng nghe khai thac gyong Id che dang phdi hep giu'a xien cheo va chia bac chan khay sir dgng vi chdng cot thuy lyc den ket hep xa khdp cho dilu kien via day trung binh, ddc 35 + 45°.
Tuy nhien, do dieu kien thyc te tai cac md, cdng tac triln khai thyc t l chi t i l n hanh dyoc e ba odng ty la Hdng Thai, Udng Bi va Quang Hanh, cdn tai Cdng ty than IVIao Khe khdng trien khai vl ly do Id che khai thac thyc t l cd gdc d i e
Trong thdi gian ap dung, san iueng khai thae dyec tif cac Id che 113.017 t i n .
Tdng hop mdt sd chi tieu kinh t l ky thuat khai thac tai cac md, dyec t h l hien tren bang 1.
3. Danh gia k i t qua t r i l n khai ap dung cong nghe trong thipc t l
3.1 Banh gia chung ve cdng tic khai thac Id chry
Viec triln khai ap dung thu' nghiem cdng nghe nho hen 35°. Cdng tac triln khai ap dung thir vao thyc t l san xuit da dyoc thyc hien day du nghiem tai Cdng ty than Hdng Thai, Udng Bi va theo cac bydc tir dao tao hydng d i n ly thuylt Quang Hanh nhy sau; ngoai mat bang, kiem tra sat hach d i n hydng - Ddi vdi Cdng ty than Hdng Thai; Cdng tae d i n thyc t l tai hien tordng thi cdng. Qua trinh triln khai ap dung cdng ngh? khai thac Id cho trien khai cdng nghe cd sy hydng dan, giam sat
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Bing 1 Chi tiiu KTKT ca bin dat duoc cua cdng nghi ip dung tai m()t si odng ty than him Id (Hing Thii, Quang Hanh. Udng Bi)
Ten mot sd chi tieu Chieu day via
Goc doc via Chidu ddi Id ch^
Cdng suat Id cho NSng suat lao ddng true tiep Chi phi thuoc nd cho 1000T Chi phi kip no cho 1000T ChiphlgdeholOOOT Chi phi lydi thdp cho 1000T Chi phi ddu nhO eho 1000T Ton that khai thSc
Bd
Tan T/cdng
So iirryng thyK td cic cdng ty Hdng Thil
1,6 + 2,7
Quang Hanh 1,f
Udng Bi 2,7
chat che, nghiem tue cua cac can bd Vien Khoa cac Id che cho thay, hd chilu chong glCr lo eho hoe Cdng nghe Md va cac can bd ky thuat cua dyec dam bao. Id che on djnh. Chieu rdng Id cdc cdng ty Do vay, cae giai phap ky thuat, quy che ludn duy tri tdi thilu 3 ludng (3,6m), khdng trinh cdng nghe, bien phap ky thuat an toan da gian lam viec thdng thoang, rpng rai, Trong qua dyoc thyc hien va triln khai theo dung cac ydu trinh khai thac d cac Id che, khdng xay ra hien cau cua thiet ke dat ra.
* Ve bo tri guong khau, cac thdng so vi hd chieu chong ciia gwang id cho
Theo dac dilm dilu kien dia chit eua cac Id ehe, cac via than cd chieu day trung binh, gdc ddc thay ddi tir 35 + 45°. Dieu kien da vach tryc tilp ciJa via bao gdm; tap Idp set than tilp theo la tap ldp bdt kit, Idp set than cd chilu day mdng khi sap dd khdng du l i p day khdng gian khai thae ludng pha hda, da vach tryc tilp tai eae Id ehe dyoc x l p loai khd dilu khien. Theo so dd, gyong Id eho khau dang phdi hop giCpa xien cheo va bae chan khay cd d i u Id che khau vuot trydc chan Id ehe, vdi cac thdng so cua gyeng Id cho; Theo chilu doc via, Id cho dyoc chia thanh eac doan, trong mdi doan bao gdm ed mdt doan chan khay thing (khay khiu gyong Id cho) nim theo chilu ddc Id cho chieu dai 12,8m va doan xien cheo gdm 3 chan khay thing, moi
tueng xd dat, dd vl chdng. IVIu'c dd an toan va dilu kien lam viec cCia cdng nhan duec eai thien so vdi Id cho chdng giCK bang gd. Da vach 6 khdng gian phia pha hda dypc sap dd va lip dly.
Viec chdng tang cydng ciii len d l nang cao mirc dd on dinh cua hang vl chdng tai ludng bao ve (dac biet e cac vi tri g i p khiic tai mdi chan khay) da phat huy tac dyng. Theo giai^^phap nay tai vi tri cudi moi chan khay (theo chilu ddc len cua Id che), vi tri luong bao ve, x l p bd sung mpt cQl lon gd tang cydng. Cdi len ed cae thanh ngang (nam theo phyong) cd chilu dai I =1,4 m, O = 150 + 170 mm, cac thanh doc (nam theo hydng ddc) cd chieu dai I = 2,0m, i t = 150 +170 mm. Ciii x l p xong, phai ganh duec ba hang xa tren cung cua mdi khay tai ludng bao ve (cpt chudng cua cDl chinh la cac cdt thuy lyc don).
Trong qua trinh khai thac, cac cui duoc xlp, luan Chan khay ed chilu dai 3,2m (tao doan xien cheo ehuyln theo mdi chu ky khiu cua Id che^Jheo
•'. ' , ^ • . • . - - . ., _ . * _ ! - _ i i _ i . . _ : • ! : ^ U A r s n o i l rfS a m
CO diem dSu vugt truo'c diem cuoi theo phugng 3,6m), chilu rpng cac chan khay 1,2m. Ting chilu dai cua doan g l m khay khau guang va doan xien cheo ia 19,6m.
Qua trinh theo doi trong thuc t l khai thac 6'
do! trong thuc t l cho thay, glai phap nay d5 lam tang muc dp on dinh eua 16 chg tgi cac bgc chan khay, tang muc d6 an toan eho 16 ehg, ap iuc 16 chg on djnh.
* Ve mCrc do on dinh cua vi chong va ket cau
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Theo dilu ki^n dja chat cac 16 chg, try eua via thu6'ng la set ket, trong qua trinh khau chong guang 16 chg, cac cpt chong ludn dugc chong sau xuong n i n 16 chg t u 0,15 -^ 0,20m. Tru6'ng hgp nen la^ bpt ket, duge phan xud'ng dao 16 chan cpt d l dung cot chong nen cac vi chong dieqtc chong giu I n djnh. Theo doi thuc t l cho thay, cac cpt chong kh6ng co hien tugng troi trugt, dam bao h6 chilu chong 16 chg. Mgt khac, vipc su dung cot chong loai DZ - 25 (22) va xa khap loai HDJB-1200, nen 16 chg Iu6n duy tri dugc chieu cao khau chong t u 1,8 -^ 2,2 m, tao khong gian 16 chg thong thoang va chong giu tit.
Ve moc lien k i t cpt chong vo'i xa: Theo thilt k l k i t c i u g l m mpt doan day xich co chieu dai 250 mm, mOt dau c6 gan dai blng thep det, b i t CO dinh vao dau cpt thuy luc, mpt dau co gan m6c thep, dugc mdc vao xa vi ching, nham de ph6ng khi cpt chong bi m i t ap, d l tr6i,truat trong 16 ehg. Theo doi trong thuc t l cho thay, khi tien hanh thu hoi day xa lulng pha hda, da vach nen de len m6c lien ket nen viec thu hol cpt ching ggp kho khan. De giai quyet van d l nay, trong qua trinh thu hoi cpt chong d' luong pha hda phai thao dai lien k i t d* dau cpt, lam phue tgp quy trinh thao tac dSn den cong tae thu hoi vi chong luong pha hda cham. Tuy nhien, khi khai thac cac 16 chg tiep theo cua Cong ty than Hong Thai, cac moc lien k i t dugc cai tien nen eong tae thu h l i cpt chong thuan Igi va nhanh han. K i t cau cua m6c lien k i t giua cpt chong vdi xa dugc hoan thien nhu sau: GIO' nguyen phin dai kep d i u cpt va xich lien ket thay doi phan mdc treo vao xa bang cae t i m I p xa, dau tren cae tam op duge lien k i t theo dgng bgn l l , d i u dud'i lien k i t bang bu long c6 lo treo mdc lien kit vd'i xich. Cac t i m op dugc b i t co dinh vao xa khi thu h l i chi ein thao phan mdc treo phia dud'i xa. Ngoai ra t i m 6p nay cdn co tae dung de dinh vi khoang each eOt chong trong qua trinh thao tac dung cot de chong giu 16 chg. Cac 16 ehg cua c6ng ty than Quang Hanh va U6ng Bi ap dgng sau duge thiet k l theo each nay ndn da phat huy tac dung rat tit, tang muc dp an toan va I n djnh vi chong.
3.2. Danh gia cong tac dieu khien da vach tat 16 cha
Theo doi thuc t l trong qua trinh khai thac a
cac Id chg cho thiy, 16 ehg sau khi thu hoi vi ching lulng pha hda, phan da vach la Id'p set k i t thuo'ng sap do ngay, con phin da vach bpt k i t phia tren chua sgp d l (se sgp do sgu khi khai thac 2 d i n 3 lulng khau). Tuy nhien, do each thuc b l tri guang ehg e6 dau khau tien truac chan ehg, nen phan da vach set k i t sap do, tr6i d i n xuong phia dud'i chan chg va vj tri tilp giap cac chan khay lulng pha hda. Phan 16'n khdng gian Id ehg phia pha hda dugc lap day. Cdn lgi phig dau 16 ehg, doan tiep giap vo'i 16 th6ng gid khoang t u 5 -^ 10m chua dugc diln dly. Sau khi thu h l i vi ching lulng pha hda d' dogn 16 nay, duac tien hanh giai phap khoan b i n bu tru than va da vach d' Id dpc via thong gid. Do vay, khdng gian phia sau 16 chg ludn dugc lip dly, hogc tgo ra dugc ID'P dem nen khi ldp da vach la bpt k i t sap d l da kh6ng anh huo'ng d i n c6ng tae ching giu va khai thac 16 chg.
3.3. Ddnh gia mux: do an toan cua cdng nghe Trong suit qua trinh trien khai ap dung thu nghipm sa d l edng nghe khai thac cpt dai theo phuang, guang 16 ehg dgng phdi hgp xien cheo va chia bac chan khay, su dung vi ching cpt thuy luc dan v6'i xa khd'p tai cac Id chg cua cac md, khdng xay ra tru6'ng hap tai nan lao ddng nao.
Mac du cac 16 chg d i u c6 dp doe eao 35 -;- 45°, cdng tac khai thac dam bao an toan tuyet doi. De dgt dugc k i t qua nhu tren, ia do edng nghp khai thae id chg su dung cpt chong thuy lue dan da dugc cac e6ng ty ap dung nhilu nam nay va khai thac trong nhieu 16 chg. Can bp va c6ng nhan phan xud'ng khai thac da due k i t duge nhilu kinh nghiem trong qua trinh khai thac va xu ty eac su co phat sinh trong Id chg; Ky thuat ea ban khai thac 16 chg dam bao, tinh thin trach nhipm cua cae can bp, c6ng nhan phan xud'ng eao; Su quan tam chi dao sat sao cua lanh dao va can bp cae phdng ban cua cac cdng ty.
3.4. Ddnh gia cac cht tieu kinh te ky thu$t dQt du^yc cua cong ngh$ trong qua trinh then khai ap dijng thi/c te
* Ve san Iwong va nang suit lao dong ciJa cong nhan 16 chg-
Thep danh gia ehung, san lugng khai thac thuc te cua eac Id chg dat dugc tuang duang hoac vugt so vd'i thilt k l dgt rg Cdng suit 16 chg dat tu 70 ^ 170 ngan tan/nam tuy theo chilu
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dai theo hydng ddc cua mdi Id che. Nang suit cho phep nSng cao chilu cao khiu nen da khai lao dpng tnrc t i l p cua cdng nhan trong cac Id thac triet d l hen t?i oao khu yyo co chilu day cho ap dung so do cdng nghd khai thac chdng d i n 2,5m. Tuy nhi^n d l i vei lo che <=^P°"9^
cdt thuy lyc don vdi xa khdp cung dat duec kha than Uong B, t i n that co nhjiu henlS do chilu cao binh quan dat 3,6 + 4,9 tin/cdng. Qua theo d^y via cua khu vyc Id'n phai d l I91 ph§n than doi tai thyc t l khai thac tai cac Id che cho thiy, nen Id che.
dilu kien dia chit via la y l u t l quylt dinh d i n 4. KSt l u | n
san Iueng va nang suit Id che. Trong dilu kidn Qua k i t qua cong tac ap dyng thif nghidm via it biln ddng, cau tao via den gian it dd kep cdng ngh? khai th^c gyeng 16 che chia b$c chSn hoac da kpp m l m , cdng tdc khai thac Id che khay, sy dyng cdt thuy lyc don k i t hep xS kh6p thuan loi hon, tif dd, cho san iueng va nang suit ji-opg a l u ki#n via cd chilu day trang binh, doc cao hen. N l u so vdi Id che chdng bang vi gd 35 ^ 450 t^i c^c (;6ng ty than Hdng Thai, Quang tnfdc ddy ap dyng trong d i l u kien nay san ^anh va Udng Bl cho thiy; (1) Cdng nghe khai Iueng cua Id che chdng cpt thuy lyc don tang (hac gyeng Id che chia b$c chdn khay, su' dgng len 1,5 + 3 lan (san lyong cua Id che chong gd (.pj t^Oy |yc den k i t hep x4 khep ap dyng phi khoang 50.000 tIn/nam) va nang suit lao dpng |,ep trong dieu kien via cd chilu day trang binh tang g i p 1,5 + 2 lan. Nhy vdy, ngoai viec nang j j ( , nghieng, da vach tryc tiep thude loai tif d l cao mirc dp an toan lao ddng. Id che ap dung so j | n khd ffilu khien (dac biet da vach tryc tiep dd cdng nghd khai thac gyeng Id che phli hep thupc loai khd dieu khiln), dam bao an toan va giCra xien cheo va chia bac chan khay sir dung f^\ thien dieu ki$n cho cdng nhdn trong khai vl chdng opt thuy lyc den vei xa khdp cho san thac; (2) Cdng nghe khai thac 16 che da cho mgt lyong khai thac va nang suit lao ddng cao hon j j ^hi tieu kinh t l ky thuat ce ban r i t tdt. Cdng han Id cho chdng bang vi go. suit va nang suit Id che dat dyec cao, gia thanh
* Ve cic chi phi vat tw cho Id cha khai thac Id che nho hon so vdi 16 che khai thac Cac chi tieu v l chi phi vat t y cua 16 che ap chdng gd trudc ddy cua cac cdng ty, tir do, mang dyng se dd cdng nghd khai thac chdng cpt thuy lal hieu qua kinh t l ; (3) Trong thei gian ap dgng Tyc don vdi xa khdp, v l ce ban, tyeng dyong cdng nghe^ty nam ^ ^ ^ ^ f " "ay " " " f ^ = ^ vol cac chi phi thilt k l da lap. Mdt s6 chi tieu ed ty (Hdng Thdi, Quang Hanh, Uong Bi) da khai tang len so vol thilt k l nhyng khong dang k l thac dyec trdn 0,8 tridu tdn.
n h y chi fieu thuoc, kip no. Nguyen nhan la do Vol cac kinh nghl$m da due ket deec trong trong thuc t l da kep trong via nhieu vi tri cd qua trinh khai thac, tao dieu kipn cho cac edng chilu day ldn va cirng, hoac nhilu vj tri via mdng ty t i l p tyc khai thac cac Id che dat cac chi tieu khdng du chieu cao chdng giif Id che, nen trong KTKT cao, mang lai hieu qua kmh te va hoan qua trinh khiu chong, phai khoan no pha kep toan cd kha nSng md rpng ap dyng chp ode via hpac khiu ca phdn ldp set sat tra- Ngoai ra, cdn cd chieu day trang binh doc nghieng co didu kien phji khoan nd mln ban pha tra than Id dpc via tuong t y cac cdng ty khai thac than hdm lo cua thdng gid d l bii vap phan khdng gian chya dyec Tap doan TKV./.
Ilp dly phia d i u Id che. Chi phi gd cho Id che Taili^u tham * h a o :
giam tren 60% so vdi chi phi cua Id che chdng 1. vidn Khoa hoc Cong nghd Md (2013), Bio bang vl gd (chi phi gd cua Id che chdng vl gd 54 ^^^ f^^f ^^g ^p (^y^g ,,3 nghidn ciru hoin thi^n m'), do phan ldn khdi iueng gd trong Id che cd ^.^^^ „ g ^ ^ ((^a,- thac Id che st> dvng cdt chdng thuy lire dan trivia 18, khu Trang Khe Cdng ty than Hdng Thai.
2. Vidn Khoa hpc Cdng nghd Md (2016), Bio t h l thu hdi d l tai sy dung trong qua trinh khai
thac.
• Ve ton that than
Kit qua tdng hep eho t h i y ty ip ton thlt trong cao danh gia tong hqip ket qui ip dm thu qua trinh khai thac thyc t l khoang 5,0 + 5,0% va nghidm cdng nghd khai thic Id chi? chdng cdt giam so vdi Id cho chong giCi' bang gd (ton thlt thijy Itrc don kit hgp xi khdp trong dieu ki9h via khai thac d Id che gd tif 25 + 20%). Nguyen ^^y trung binh, d6c 35 * 45' vung Quing Nmh.
nhan la do viec ap dung cdt thuy lyc don DZ-25
KIICNM s o 8/2016 * CNKT HAM LO
