Thong tin khoa hoc cong nghe m o
/PHirONG PHAP XAC DINH CHIEU SAU AN TOAN KHAI THAC CAC VIA THAN DU^J NHIING DO! TUtTNG CAN BAO VE TREN BE MAT
TAI mo THAN NUI BEO
The paper represents the necessity for protecting the surface objects when carrying out the underground coal mining operations and it also introduces the method for determining the safe mining depth for each mining technology in accordance with the roof rock control method. The Maxxip soft ware has been used to check the calculation of the safe mining depth for Nui Beo underground coal mine
GS. KAZANIN 0.1.
NCS. Le VAN HAU TneC/ng Dai hoc M6 St. Petersburg
KS NGUYEN OCrC TRUNG Bien t$p: TS. Truxmg Due Dw
Hign nay, mo than Nui Beo dang tien hanh khai than bang phuang phap lp thien tai via 14, theo k l hoach, khai tnj'O'ng mo lp thien se dung khai thac a muc -135. Phin tri> luyng than a dudi sau cua mo se duyc khai thac bang phuang phap h i m 16, do vay, t u nam 2010 Cdng ty than Nui Beo da k i t hyp vai Vign Khoa hpc Cong nghg Mo - Vinacomin thyc hign lap d y an nay. Cho d i n nay, dy an da dupe phS duyet va ehuyen sang buac thiet ke ban ve thi c6ng. Theo dy an dIu tu, trong khai truo'ng cua mo Nui Beo c6 6 via (13, 11, 10, 9, 7 v^ 6) du-yc quy hoach khai thac bing phuang phap h i m 16 tai mice - 400, vai tong trif luang cong nghigp la 51,10 trigu tan [3]. Trong d6, phin tru' lupng khai thac theo phuang an dilu khien da vach bang pha hoa toan phan la 30,78 trigu t i n , phan c6n la 20,32 trigu t i n n i m duo-i cac doi tupng cIn bao vg tr§n be mat se khai thac bing phuang an khac.
De khai thac eac via than dual cac c6ng trinh cIn bao ve, mgt s6 nuac tren the gi6'i da ap dgng c^e giai phap nhu: chen lip khong gian khai thac, khai thac de lai try than bao vg, giu' vach bang cac vi chong (vi neo, cui lyn, hoac cactn^ than ..)nhlmhanchesy anhhuo'ngcua qua trinh khai thac tai cac cong trinh tren b l mat.
D l i vai Viet Nam, trong nhung nam qua, c6 nhilu cong trinh nghien cuu v l v I n de khai thac than duai cac d l i tupng cIn bao vg tren be mat, kit qua nghien cuu da dupe ap dyng vao thyc te san xult, diln hinh la cong trinh ap dyng thu nghiem cong nghe khai thac cpt d^i theo phuang, dieu khien da vach bang phuang phap
Chen 16 to^n phin tai 16 chp muc -25/+30, via 8 Tay, xuyen via 56-1, Canh Bic, Cong ty than Mgo Khe. K i t qua dp dyng thu nghigm cho thIy chung ta c6 t h i thyc hien duac cong nghg khai thac dieu khien da vach bang phuang phap chen 16 toan phan. Ap dung cong nghg nay la m^t thanh tyu ve mat ky thuat, ma ra huang khai thac su dyng chen 16 de bao ve cac cdng trinh tren be mat.
Vai thyc trang khai thac than tai cac mo him 16 vung Quang Ninh hign nay, truo'C mit, cIn phai xac djnh chieu sau an toan c6 t h i ap dyng nhCfng cong nghg khai thac truyen thing tai cac mo than ham 16 viing Quang Ninh (dilu khien da vach bang phuang phap pha hoa toan phin), cung nhu xac djnh phin trij' lupng cIn thilt phai ap dgng nhC^ng giai phap dilu khien da vach khac nhu: chen 16, d i lai try bao vg... cho phin trO luang nam duo'i cac doi tu'ang cIn bao vg tren be mat tai mo Nui Beo. Khi do, chilu sau an toan khai thac Hb c6 the su dung phuang phIp dieu khien da vach bing pha hoa toan phin dupe xac dinh theo cong thuc sau [4]:
Hb=Kbxm, (1) Trong do Kb - Hg s i an toan (gia tri cua hg s6 Kb phy thugc vao d p cong trinh cIn bao vg v^
dupe ap dgng theo bang 2); m - chieu day khai thac higu qua, m.
Can cu- vao " Quy tac bao vg cac cong trinh va doi tupng ty nhien tu sy anh huo-ng c6 hai cua khai thac h i m 16 trong cac mo than" [2], tiln hanh phan loai cac cong trinh cIn bao vg trfen b l mat vd xac djnh nhij'ng gia tri biln dang ngang
KHCNM S 6 6/2016 * CNKT HAM LO
Chao mCfng 91 nam Ngay Bao chi Cach mang Viet Nam
va dp nghigng cho phep doi vo'i tifng loai cong khai thIc tdi cac c6ng trinh trSn b l mat, se tinh trinh c I n bao ve tren bh mat cOa mo than Nui t o l n , kiem tra chp cdng trinh xay dLpng c6 SLP Beo (bang 1). b i l n dang ngang cho phep nho nhIt (difoing cap Tip bang 2, d l giam anh hipgng cua q u i trinh nglm E = 2 .10-=) lu'gng LPng vo'i cap cong trinh Bing 1. Gii tri biSn dang cho phip v(fi tCrng loai cdng trinh [3]
TT 1 2 3 4 5
6
7
8
9
10 11 12
13
Loai cong trinh xay dimg
Nhd g 1 -^ 5 t i n g x^y gach, kich thLp6c 10 x15m, hao m6n 30%.
NhS o 1 .^ 5 tang, ket c l u khung kich thu'oc 15 x 20m, hao m6n 30%.
Tu'ang Tio c h i n xSy gach 0,2 .;- 0,3m, cao 1,5 m; dii 40 ^ 50m.
To^ nh6 topgng hoc, b6nh vi§n, cflng s o ket c l u khung b6 t6ng, xSy gach 2 .f 3 t i n g , dfl hao m6n 30%.
Ou6ng cap n g l m D u g n g 6ng d i n nu'6'c;
a - O u 6 n g chinh d | t trfen m | t dat b- B u g n g chinh th6p d^t du'*i d i t
©at trong cat Bit trong i s6t vi set
- Oipgng s i t tai trpng <10 tri^u tln/nSm, toe dfl 40 -^ 80 km/h - Bu-^ng qu6c 16 18
Tram bien ap - B i $ n a p 1 1 0 + 400kV - B i $ n a p < 1 1 0 k V
Bipgng day d i | n cao the 35kV, 6kV, cSc du6ng dSy ha the 220V SiSn dSn dgng.
B u g n g giao thdng li6n khu Bell tu-ong ni§m, nghla trang
C i c cflng trinh d i n nyOc kM cau be t6ng c6 dfl sSu <3m.
a- Mgng ong d i n bang gang khong cip luc c6 du6ng kinh d:
d s l O O 1 0 0 < d S 2 0 0 200 < d < 400
b- B u g n g ong th6p c6 ^ p Igc I . T r f l n m i t d a t
2. Du**! d I t
-cat
- S 6 t
Loai dang c 8 8 8 8
8
8 8 i E R htti V 8 i 8 i
8 e 8
8
8
8 8
Tri so bien dang Cho phip
4 . 1 0 ^ 5 10-=
10.10^
3.5.10^
2 .10 = 10.10-=
5.10-=
4.10-=
10.10^
8.10-=
6.5 km 5 cm 15mm/ng
Gidi han 5.10-=
6.10-=
12.10-=
4 . 5 . 1 0 ^ Bgi d I t ra
15.10-=
8.10-=
6.10-=
10.10 = 8 10-=
6.5 km 5 cm 15mm/ng
7.10-=
11.10-=
10.10-=
14.10 = Khai thac binh thufrng.
Theo dfli v6 sua ch&a Khai t h I c binh thuOng.
Theo dfli vi sua chipa Khai thac binh thugng.
Tu sOa thuong xuy^n 5.10-=
3.10-=
7.10^
3.5.10-=
5.10-=
4.10^
2.5.10-=
8.10 = 4.10-=
3.10-=
16.10 = 6.10-=
5.10 =
hmlQ.
KHCNM SO 6/2016 * CNKT HAM LO
Thong tin khoa hpc cong nghe m o
Bing 2. Bing phin lo^i dp c6ng trinh cin bio ve[4]
Bing 3. Cic tham s6 gdc djch chuySn dit di lai mdt s6 md than him Id vCing Quing Ninh [5]
Bien da phip,
2 va nho hon 2,1-4,0 4,1-6,0 Lfln hon
6 ngcho
1-10^
ra
4 va nho han 4,1-6,0 6,1-8,0 L6n hon
8
Cap cdng trinh bao
vi 1 II III IV
Chieu rgng dai,
m 20 15 10 5
Hi so an toan, Kb
200 150 100 50 cIn bao vg loai I (bang 2), cac cong trinh c6n lai se duac tinh toan tuang ty. D l i vo'i cac c6ng trinh thugc d p I, hg so an toan khai thac Kb = 200. Theo dy an dau tu, khi mo h i m 16 di vao hoat dgng, Cong ty se t i l n hanh khai thac via 11 dIu tien, cac via tiep theo se duac khai thac theo trinh ty tu tr&n xuing duai. Via 11 c6 chieu day trung binh 3,9m; goc doc via trung binh 20°;
chieu sau phan bo via tai mi>c -200. Trong trud-ng hap khai thac toan bg chieu day via, su dyng phuang phap pha hoa toan phin, chilu sSu an toan khai thac phai dam bao: Hb = 200 x 3,9 = 780m (cac via tiep theo dugc ttnh tuang ty, tuy nhien, can phai cgng them chieu day cua via phia tren da khai thac).
Tren ca so' ket qua tinh toan tren, tac gia se su dyng phin m i m «Maxxip» [1] de kiem tra va xac ^nh lai he s6 an toan khai thac Kb phu hap vai dilu kign cua mo than Nui Beo. Khi su dung phan mIm « Maxxip», can thiet phai xac djnh nhOng tham so goc dich ehuyen dat da trong dilu ki0n dia chat cua mo NtJi Beo. Ket qua quan trac thyc dia cua Vien Khoa hgc Cong nghe Mo da xac djnh duac cac tham so goc djch chuyin dat da cua khoang sang than Ha Lam - Nui Beo (bang 3).
TrSn hinh 1 da chi ra nhung gia tri djch ehuyen dIt da b l mat 16'n nhat cho phep, cy the la, dp nghieng i= 4-10^, d6 cong K = 0.2-10-^ va bien dang ngang E = 2-10^ Cac gla trj d6 dupe xac lap trong [2] Quy tac bao ve cac cong trinh va doi tuang ty nhien tu sy anh huang c6 hai cua khai thac him 16 trong cac mo than, khi su dung phuang phap dieu khien da vach bang pha hoa toan phin hoac de lai cac try than bao vg.
Tren hinh 1, theo trat t y (c, e, h) cho thIy, doi vo'i Tin cic
36c
a S I T»
p.
5
r P
Vo T l T i T j 6
Gii tri quan trac tai thlK dia Nam
Mau 2 5 - 3 5
71 60 53 76 76 60 45 48 85 79 70
Mao Khe
25-27 Kh6ng xac
djnh 60 63 Khflng xac
djnh 67 65 45 Khflng xac
dinh Khflng xac
dinh Khflng xac
dinh 82
Hillm- Ntji Beo
12 70 56 45 75 67 55 45 63 75 74 85
Mdng Duvng 40 65 65 36 75 75 43 Khflng xac
dinh Khflng xac
djnh Khong xac
djnh 64 57 he so an t o l n Kb - 140 thi tham s i djch ehuyen dat d l tinh toln da vugt qua nhOng g i l tri cho phep. Nhu' vly, c6 t h i k i t luan, doi vgj dieu kien mo than Niii Beo da thyc hign nhCrng s i lieu nghien CLPU quy trinh djch ehuyen b l mat khi khai thie elc via than bang phu'gng phap de lai tni bio ve, thi hg so an toan khai thIc e6 t h i dat tCr 160-200 (dli VO'I cong trinh elp I). D l dam bao an toan cho c i c cong trinh tren be mat trong bien gio'i cua mo than Nui Beo, khi tiln hanh khai thIc phin triJ' lu'gng du'O'i elc cong trinh cIn bao ve, chieu s l u khai thIc c6 t h i l p dung phuwng phIp dilu khiln 6a vach bing p h i hoa toln phin la 624m, tugng Crng vo'i he so an toln Kb = 160 (doi vgi cong trinh e l p I). Nhu vay phin trU lugng thupc via 11 nim du'gi elc cong trinh tren be mat can bao vg khi tiln hinh khai thIc khong t h i I p dung phu'gng phap dilu khiln da vich bang phi hoa toln phin, do chilu s l u phin bo cua via 11 chi d?it 2C0m (cae via tilp theo du'gc tinh toln, kiem tra lu'gng t y nhy d l i vgi via 11).
Ket qua tinh toln tham so djch chuyin dat d l
KHCNM S 6 6/2016 * CNKT HAM LO
Chao rnyng 91 nam Ngay Bao chi Cach mang Viet Nam
- Gia tri djch chuven nRau^ tren b ^ m j t dja tiinli b - Gia tii b ^ d^iiR nRanji ciia bi mit dia binh H/n/71. Tham s6 djch chuyin dit di bi mit trong m6 Nui Bio (khai thic mdt via) khi ap dyng giai phap d l lai try bao vg da dua ra
duyc phuang phap tinh toan, kilm tra va x^c (^nh tham so djch ehuyen dat da cho mo than Nui B6o. Tren ca sa ket qua tinh toan, c6 the xac S\r\Y\ phin tru' luyng c6 t h i ap dyng nhung cong ngh$ khai thac hi^n tai o' c^c mo than h i m 16 vung Quang Ninh, va phin trij' luyng can thilt phai ap dyng cac giai phap dieu khien da vach nhu: chen 16, giu vach bing cacvi chong... Han nu'a, s6 ligu nghien CLPU da chi ra, doi vo'i mo than Nui Beo, de dam bao an to^n cho cac d l i tuyng c I n bao vg trdn b l mat, hg so an toan khai thcic Kb khong dyyc nho han 160. Khi hg so an to^n nho han 160, gia trj bien dang ngang cua be m^t trong vOng khai thac da vuyt qua gi6'i han cho phep (hinh 1)./.
Tai li$u tham khao:
1. TS. Tru'ang Dire Duf (2010), Di/an dau tie xay di/ng cong trinh khai thac ham Id mo than Nui B6o, Vign Khoa hpc Cong nghg Mo, Ha N6i.
2. PGS.TS Phung Mgnh Dac (2011), Nghien
CLFU li/a chQn cac giai phap ky thu$t va cong ngh§ hQp /y di khai thic than d cic khu vt/c c6 di tich Ijch su' van hoa, cong trinh cdng nghi$p va dan dijng, Bao cao t i n g k i t khoa hgc va ky tuSt d l tai, Vien Khoa hgc Cong nghg Mo, Ha Ngi.
3. npaaiiJia oxpaHbi coopy}KeHtii^ M npiipofl- HblX 06'beiCT0B OT SpeAHOrO BntinHHfl noAseuHbix ropHbix pa3pa6oTOK Ha yro/ibHbix wecTopoKfle- HM?ix.-Cn6.:BHHMM, 1998.-291 c.
4. MycractJHH M.r, HayiwoB A.C.(2012) KOHT- po/ib AonyCTMMbix Ae0opMai4iiii seMHoii no- aepxHOCTH npH CTpoMTenbCTse sepTMKanbHbix Bbipa6oTOK B ycnoBMflx 3acTpoeHHbix reppMTO- pHH. 3anncKM fopHoro MHCTHTyra, TOM 198,
cne.
S.AKMMOBA.T., rpoMOB B.B.(2003), feoMexa- HHHecKne acneKTbi cflBH>KeHHfl ropHbix nopoA npH noflseMHOii pa3pa6oTKe yronbHbix ii pyAHbix MecTopOJKAeHMiii. C-neTep5ypr.
^ 1 ^ - ^
KHCNM SO 6/2016 * CNKT HAM LO
