Thong tin khoa hpc cong nghe m o \|TH!ET KE AP DUNG GIAI PHAP PHUN KHJ mO VAO KHU VlTC PHA HGA cua 16 chg flang hoat flgng nhim phong ngira hien tugng than tuf chay The spontaneous combustion of coal has so far commonly happened in the coal mining sector on the world andin Vietnam as well There have been many preventive measures, of which, the nitrogen injection solution to the caving section at the operating longwall has been considered as an active one for preventing the spontaneous combustion of coal without interrupting the coal production process In this paper, the authors represent the design and application of the nitrogen injection solution to the caving section at the operating longwall for preventing the spontaneous combustion of coal KS NHU" VIET T U A N TS PHLING QUOC HUY ThS Le TRUNG TUY^N Vi$n Khoa hqc COng ngh$ MO - Vinacomin Bien tap: ThS Ph?m Chin Chinh Than ty ehay Id hign tugng xay kha biln ngdnh khai thac than tren the gidi va Cho d i n nay, hien tugng chay md qua d Vigt Nam Cd nhieu giai phap ngan ngira, trinh khai thae than ham Id tai Vigt Nam da xay dd, phun nito vao khu vue phd hda cua tgi mgt s l md nhu Ldng Cim, Khe B l , Hong Id chg dang hogt dpng duge coi Id giai phap Thdi (4 Iln giai dogn 2004 - 2009); Cdng mang tinh chii ddng, ngan ngua hieu qua hien ty TNHH MTV 91 - Tdng Cdng ty Ddng Bac (4 tugng than ty ehdy md khdng ldm gian dogn qud lan giai dogn 2007 - 2011) De xCr ly va trinh san xuit, ngan ngipa hign tugng ty ehdy (an rOng, mgt so Xu hudng su dung nito phdng ehong gial phdp da dugc dp dyng nhu: chay da duge nhieu nude tren the gidi dp dyng - each ly khu vyc chay nhu Id ehg, guong Id ed hieu qua Theo bao cao [1] v l vige si> dyng ehay bang cdc tudng chan tgm, eo djnh vd phun nito phdng ngipa than t u chdy cac nito vdo khu vye cdch ly (Hong Thdi, Cdng md ham Id, hon 60 nam qua, nito da dugc ty91) nhilu nudc sip dyng d nhieu nude nhu CH Sec, - Xay dyng cdc tudng ehan bit eae hgng Anh, Slovakia, Nga, Du-c, Phap, Ba Lan, Ru- d l each ly khu vyc pha hda phia sau Id chg mani, Trung Quoc, Australia SLP dung nito tranh lugng gid rd qua cac hpng vao khu phdng ngua than ty ehay tgi khu vyc pha vye phd hda (Cdng ty 91) hoa cua cae Id ehg dang khai thae eung da dat - Xdy dung cdc tudng chan tgm d d i u va dugc cac kit qua kha quan tgi CH See, Australia ehan Id ehg d l han c h l rd gid vdo khu vue da va Trung Quoc [2] khai thde d phia sau Id chg, ngan ngira hign Mdt so vy than ty chdy xay thdi gian tugng ty ehdy ed the phdt sinh khu vyc da gan ddy mgt so md than ham 16 tai Viet khai thde phia sau Id chg Nam cho thiy, than tu chay la nguy co hign htpu - x l p ddi bao edt dpc theo hudng doc cua 16 doi vdi cdc md than ham Id Viet Nam Viec chg, khoang cdch giu-a cdc dai bao cat tip 50 den nghien ciru ap dyng giai phap phun nito vao 60 met (md than Hong Thai) khu vye pha hda cua 16 eho dang hoat ddng d l - San gat mgt bang nhdm lam giam ede khe phdng ngipa than t u chay cho cac khu vyc cd nipt gdy rd gid xudng khu vyc khai thac, pha hoa nguy eo cao la can thilt Cac kit qua, kinh Cdng tac dugc kilm tra thudng xuyen nghigm rut tip vigc dp dyng glai phap se la kinh phdt hien cd khe nirt, ho syt lun d l tien hanh san nghiem de nganh Than cd them lua chpn lip mat bang (Cdng ty 91) cae bien phdp phdng ngipa hign tugng than t u Qud trinh dp dyng cdc gidi phdp tren cho thiy, ehdy cdc md ham Id Viet Nam viec SCK dung tudng chan kit hop vdi phun Cac vu t y chay va cac giai phap da thyc nito vao khu vyc each ly td ed higu qua va phu KHCNM s o 2/2015 * AN TO\N MO Thong tin khoa hgc cong nghe m d Hinh Rd giO khu phi hoi cOa mO hinh thdng Hinh Rd gid khu phi hoi cOa mO hinh gid chu- U hO thdng khai thic khiu dudi thdng gid ehif U, h$ thdng khai thic khiu giit Hinh Rd gid khu phi hoi cua mO hinh Hinh Rd gid khu phi hoi cua md hinh thdng gid chi/ Y thdng gid theo chieu ti> trOn xudng thdng gid ehif Y- thdng gid tCf duoi len hgp vdi cdc khu vyc da k i t thue khai thdc hay dp khai thdc Id chg, cdch thuc quan ly khi, tgi cdc guong Id dpc dao, nhung doi vdi cdc Id phuong phdp dac vd kiem soat, xay dung cdc chg dang khai thdc, ludn cd mgt lugng gid luu bign phdp an todn Id cdc y l u to quan trpng, thdng qua khu vyc pha hda, viec phun nito can duoe xem xet, ddnh gid thilt ke dp dung vao khu vyc nhdm myc dich ngdn ngira than tu giai phap ehdy vdn phai tri san xuat can phai 2.1 Anh huong cua so dd thong gio dugc xem xet ky luong Tuy thude vao so thdng gid, hien tugng rd Cac y l u t6 anh hu'd'ng d i n viec ap dung gid khu vyc pha hoa rit khae Vol giai phap phun nitty cac via than cd tinh tu chdy, ap dyng giai D I gidi phdp phun nito vdo khu phd hod phdp phun nito vdo khu vyc phd hoa phai eua Id chg dang hogt dgng dat hieu qua, ldm xem xet ky din hien tugng rd gid qua khu pha giam hdm lugng dxy tgi khu vue phd hda va dam hoa de giai phdp phun nito dat hieu qua bdo an todn tai khu vyc Id chg Id yeu cau quan So dd thdng gid tai hinh (so thdng gid trgng Vdi cdc dudng Id vd khu vye da dugc chD" U) cho thiy, ed luong gid rd Idn qua khu vue cdch ly, vide phun nitg vdo khu vyc da each phd hod cua Id chg ly kha don gian va higu qud Hieu qua eua viec So thdng gid tai hinh (so thdng gid phun nito phy thugc chu y l u vdo yeu to Id chO U) cho thay, lugng gid rd qua khu vgc phd ndng lye cua thilt bj sinh nito vd dp kin cua hod cua Id chg nhd hon nhilu so vol so d tuong chan hinhl Doi vdi khu vye phd hda eua cdc Id ehg dang Hign tugng rd gid qua khu phd hoa cdc khai thdc, higu qua dp dyng giai phdp phun so dd thdng gid tren xudt phdt tir cdc nguyen nito bj anh hudng bdi rit nhieu cdc y l u to lien nhan sau quan Ngodi ndng luc cua thilt bj sinh nito, - Rd gid qua phan tiep xue vdi Id ehg: dd cdc y l u t l ve thdng gid, vj tri dat vdi phun, toe vdch sap dd khdng hodn todn, ddng chay r l i , KHCNM S6 2/2015 * AN TOAN MO Thong tin l