Nghiên cứu áp dụng công nghệ khai thác lò chợ xiên chéo, chống giữ băng dàn chống mềm zry cho điều kiện vỉa dày trung bình, dốc trên 45 độ tại các mỏ hầm lò vùng quảng ninh

Thong tin khoa hpc cong nghe m o NGHIEN Cl)U AP DUNG CONG NGHE KHAI THAC LO CHO XIEN CHEO, CHONG GIJJTBANG DAN CHONG MEM ZRY CHO DIEU KIEN VIA DAY TRUNG BINH, DOC TREN 45 DO r e i CfiC MO H^N Ld VUNG QUANG NINH The diagonal longwall mining technology with using the ThS TRAN TUAN NGAN flexible shield ZRY has been so far applied to the mining ThS PHAN VAN VIET operation for the medium coal seams having the dip angle over KS NGUYEN NGOC GIANG 45P at some Chinese underground coal mines with remarkable Initial achievements This paper represents some results fromVien Khoa hgc Cdng ngh$ Mo - Vinacomin Bien t$p: TS Truxmg Duv Dw the application of thd diagonal longwall mining technology with using theflexibleshield ZRY to the medium coal seams having the dip angle over 45° at underground coal mines in Quang Ninh area I Dgt vdn d l Ket qua ddnh gid so bg cdc tdi lieu dja chit eho thiy, cdc via than ddy trung binh, doc tren 45°, phan b l d h l u het cac khodng sdng vung Quang Ninh vdi tru' lugng tuong doi Idn, khoang 100,5 tripu tin, chiem 6,3% tong tru' lugng ddnh gid (1.605,8 nghin tan) Tuy nhien, viec khai thdc eae d l i tugng via r i t khd khan, phuc tgp hon nhilu so vdi via thoai, nen cdc logi hinh edng nghe khai thde thu cdng dang dp dgng phi bien tgi cdc md chua ddp ung dugc yeu d u eua san xuit Vi v§y, doi vdi dieu kipn via die, d n tim kilm logi hinh cdng nghp mdi, phu hgp hon TCr dd, nhung nam qua, Vipn Khoa hpe Cdng nghp Md dd thyc hipn nhilu cdng trinh nghien cuu, lya chgn cdng ngh$ khai thdc via die vd phli hgp vdi chuyen gia nudc ngodi, cdc md him Id trien khai dp dgng kit qga nghien euu vdo thyc t l san xuit, nhu cdng ngh0 co gidi hda ding b l khiu than bdng mdy bdo, ehong giu bing t l hgp ddn ehing 2ANSH, dp dung cho dieu ki$n via ddy 1,2 + 2,2m dd dugc nghien cuu, dp dyng thdnh cdng tgi md Mgo Khe va Hong Thdi, mang Igi hipu qua thilt thuc doi vdl san xuit Song, chi phi d i u t u ddy ehuyen thilt bj Id chg 2ANSH kha Idn, mgt khde, tru lugng cdc via than ndy tgi cdc md it vd khdng tdp tmng ndn cdng ngh0 hipn chua dugc trien khai nhdn rdng cho nhi/ng don vj him Id khdc Do dd, phan Idn tru lugng via day trung binh {1,2 •*• 3,5m), d i e tren 45° v i n dang duge cdc m6 huy d|ng khai thac bdng mgt s l logi hinh edng nghp khai thdc thu cdng nhu: cdng nghp khai thdc Id dpc via phan ting, ehong giu bang gid thuy Iuc di ddng XDY; edng nghe khai thac buong thugng, ho|c ddo Id lay than Cac logi hinh cdng nghe cho ndng suit lao ddng vd san lugng Id chg thap, gid thdnh khai thdc cao vd muc dO t i n that tdi nguyen Idn Tu dd, viee nghien cuu lya chpn cdng nghe khai thdc cho d l i tugng via ddy tmng bmh, die tren 45° d n phai tilp tyc trien khai thye hipn II T i n g quan kinh nghiem dp dung cdng nghp khai thac Id c h g xien cheo, chdng giir bdng ddn m l m tren the gidi va nu'dc Tgi cae nudc phat triln nhu Lien Xd (eu), mdt s l nude Ddng Au va Tmng Quoc, t u nhO'ng nam 1960 ngudi ta da nghien cuu vd dp dyng thdnh cdng so cdng nghp khai thac Id ehg xien cheo, ehing gii> bdng ddn ehong mem (hinh 1) d l khai thdc cdc via ddy tmng binh, doe tren 45° Ban chat cua so d l cdng nghp khai thac Id khiu than bang khoan no tren tuyln guong Id ehg xien cheo mgt gdc nhat djnh (tuy thupe gdc die via than) so vdl phuong via, dudi mpt hp thing ddn ehong ddc biet Ddn ehong ndy cd khung dugc lam bdng cdc vi ehong kim loai (thep chi> I hogc thep Idng mo SVP) lien kit "mem" vdi bdng cdp thep, vay cdn dugc ggi Id dan ehong mem Ddn ching mem dugc ldp dgt tgi thugng khdi dilm ddo cheo gdc so vdi phuong vd hudng d i e eua via, tao tuyln guong Id chg xien cheo cd gde die so vdi phuong nam ngang tu 25 ^ 30° Phia tren dan KHCNM s o 1/2015* CNKT HAM L Thong tin khoa hoc cong nghe m o - Ld doc via thdng giO; - LO doc via vin tii; - Thuong khdi diim; - Din chdng; - Quy dao dich chuyin din; - Vi tri cic din chdng vd trang thii nim ngang; - Hong sio rdt than Hinh Sa dd cdng nghi khai thic 10 cho xHn chio ching giQ" bing din mim ehong dugc trai Idp ludi thep vd phen tre nua Idm Idp dpm ngan cdch vdl da phd hda Trong qua trinh khai thdc, edng nhan lam viee phia du'di ddn ehing, thye hipn cde thao tac khoan n l min, dao hao lay than Than nd dudi dan ty trugt tren mdng kim loai xuing cdc phdng thdo than phia ehan Id ehg Culi mdi ehu ky khai thdc, dan ehong dugc dieu khien ty trugt theo hudng doc dudi dp luc cua dd phd hda va ty trpng cua ddn, vdl khoang cdch dich chuyin bang tien dp khdu guong Sau mdt sd chu k^ khai thac, se tien hanh thdo thu hdi bdt vi ching a phia chan Id chg vd chuyin len lap dgt bo sung phfa Id dpc via thdng gid hieu ZRY ed hp thong ng uu diem nhu: to chuc san xudt don gian, khdng phai thyc hipn thao tae ehing giQ- guong vd dieu khiln da vach, giam lao dpng thu cdng, cai thien dilu kipn lam Nguyen ly Idm viec eua dan ehing mem ZRY vipe va cd t h i cho nang suit lao dgng cao Ngodi duoc t h i hien tren hinh 3, nhu sau: Moi gia Id ehg dugc chudn bj theo hp thong khai thac cgt dai theo phuong, khoi lugng Id chuan bi cung nhu ty Ip t i n thdt than giam so vdi cdng nghd khai thac buong thugng hoac cdng nghp khai thae Id dge via phan tang Tuy nhien, nhugc dilm cua logi hinh edng nghe ndy Id vipe dieu khiln di ehuyin dan ehing phu thudc rat nhieu vdo muc dd on djnh chieu day va gdc doc via Dgc biet, trudng hgp chieu ddy via giam, chilu rgng dan ehong khdng t h i thay doi nen vipc dieu khiln dan chdng se rdt khd khan Nham khac phuc nhung han che nay, thdi gian gdn day, Trung Qudc tiep tgc nghien euu hodn thipn kit d u dan ehong mem theo hudng cd su dgng he thing thuy lyc hd trg dieu khiln b) Ket cau xich Ii6n ket cdc ddn ehong ddn ching djch chuyin Theo dd, ngudi ta Hinh eiu tao din chdng mim ZRY da chl tao thdnh cdng loai ddn ching mem ma KHCNM S6 1/2015* CNKT HAM LO Thdng tin khoa hoc cong nghe mo a) Khoan l l gu'Ong Id chg b) Nap, no min, thdng gio c) Tai than, ddn theo tiln dg Hinh Nguyin ly lim viic ctJa din ehong mim ZRY ehong dugc ldp ddt, cho mOt ddu cua gid la (cdc Id chg thude cac tinh Ha Bac, Thanh Hal, xa d i n hudng (1) bam vdch, d i u cdn lai Id xd Tan Cuong), khai thdc hipu qua cdc via than cd dudi (4) ching tryc tilp xuing tnj via, tgo thdnh chilu day tu 1,6 -H 4,5m, gdc die tren 45° Kinh dilm ehong co ban cua moi gia Gia ching nghiem cho thay, chieu dai Id chg 80 -^ 100m, dygc cdn chinh cho dogn xd ndc (2) ludn d cdng suit dgt 300 - 600 tln/ngdy-dem Hi^n trgng thdi nam ngang, dd, phy thugc vao nay, tai md than Hing Viln dang khai thac Id chg chieu ddy via, chilu cao khoang khdng gian ldm via Bl bang so edng nghe khai thdc , vdl vipe phia dudi ddn ching dugc tri t u ddn ehong logi ZRY36/45L Via than d i e 1,6 -^ 1,8m Dgc theo chilu ddi Id chg cd d i e 45 -^ 55°, trung binh 51°, via cd dd kep day 25 H- 28° so vdi mat phdng ngang, cdc gid ching 0,3 ^ 0,8m, dd vdch, try via Id bpt kit ben vung, dugc lap dgt cdch 300 ^ 350mm vd dugc than cd he s l dd kien c l f = ^ San lugng Id Hdn kit chdc chdn vdi bang k i t d u xich chg binh quan 300 tan/ngdy-dem, nang suat lao hodc khdp ban l l , tgo thdnh he thing dan ehing dpng dgt 4,0 tan/edng mem dgc chilu ddi Id chg Khi lap dgt dan ehong, se tien hdnh trai Idp ludi thep bao phu phia tren d l ngan d i t dd roi vdo khdng gian lam vipc phia dudi Qud trinh khai thde, se khoan no mln khiu guong tung Idp vdi tien dg 0,8m Sau khau than, ddn ching dugc dilu khiln dich chuyen xuing phia dudi vdi budc di ehuyin tuong ung tiln dp khiu Ddn ching mem ZRY da dugc dp dgng khd p h i biln tgi khoang 10 Id chg d Trung Quie Tren hinh Id mpt so hinh anh ve ddn ching mem ZRY su dung tai eae md ham Id Trung Quic O nudc, glai doan ti> nam 2001 din 2004, Vidn Khoa hoc Cdng nghp Md da phdi hgp vdi Cdng ty than Vang Danh nghien cuu vd triln khai dp dung thu nghiem so edng nghp khai thdc Id ehg xien cheo su dyng ddn ching mem tgi via 8, Tay Vang Danh Via than ed chilu ddy tmng binh 3,2m, gdc doc trung binh 82°, Id chg Din chdng mim ZRY Guung Id chg via Bl md Hdng Vidn Hinh Din chdng mim ZRY si> dung cic 10 cho d Trung Qudc KHCNM S6 1/2015' CNKT HAM LO Thong tin khoa hoc cong nghe mo xien cheo ddi 40m, chieu cao tdng khai thdc 31,5m Ddn ehong m l m diroc ldp ddt io dhg Id \og\ ddn phdng, dime cau tao bang cdc xd thep chQ' I noi lai voi theo cdc mdng bdng cac gong vd dinh vi M6\ mang ddn ehong cd chieu dai 1,0m, cdc mang va cdc xd thep lien ket tong hep bdng cap thep, du'crng kinh * 28mm Trong qua trinh khai thdc, cac xd thep du'O'C thu hoi a phdn duoi cua ddn va idp tra iai 6" ph^n ddu dan Phia tren ddn ehong, trdi mot id'p \u/a\ thep B40, lien k i t vd'i bang cdc moi noi diJng ddy thep O Ben tren lu'di phO lop phen tre, tac dung ngdn ddt dd nho Ipt qua ddn vdo khoang trfing 16 ehp' Kit qua triln khai dp dung thu'e te tai Id chp' vfa 8, Tdy Vdng Danh da khai thde du-p-e khoang 25.000 tdn than, vol cdc chf tieu kinh t l ky thuat co ban cua 16 chp" nhu' sau: san lu'gng khai thdc 50 tan/ngdy-dem, lu'o'ng du'ang cong suit 16 che 18.000tdn/nam; ndng suat lao dpng 1,55 tan/cong; ehi phi thuoc no 395 kg/1000 tan; chi phi met 16 chudn bi 57m/1000 tin; ty le ton thdt than 31 % V l ea ban, cac chi tieu kinh te ky thudt thip han nhieu so vd'i thiet k l , qua trinh dp dyng dieu kien aa chat thay doi, via biln dpng v l chilu ddy vd goc doe khiln viec dilu khiln ddn ehong gap nhieu kho khdn Vi vay, loai hinh eong nghe ndy dd phai tam dirng a giai doan thLr nghidm ma i