Hpi nghi khoa hoc kT thudt mo quoc te 2010 Cong nghiep mo tien tien vi su phat trien ben virng LAP MO HINH SO DUNG CHO THIET KE HE THONG CHONG LO CHUAN BI TS KH KS Zbigniew Niedbalski Hoc v ien Khoa h[.]
Hpi Cong nghi khoa nghiep hoc mo tien kT thudt tien mo quoc vi su phat te - trien 2010 ben virng LAP MO HINH SO DUNG CHO THIET KE HE THONG CHONG LO CHUAN BI TS.KH.KS Zbigniew Niedbalski H o c v i e n K h o a hoc C o n g N g h e M o ( A G H ) K r a k o w , B a L a n Tir khoa: Chong lo khai thdc, mo hinh so Gidi thieu Khi dao cac dudng Id d sau tren 1000m, xuat hien hang loat cac van de phuc tap, kho khan lien quan den cac hien t u o n g sau day: gia t r i ap l u c thang d u n g cd gia t r i dang ke\ ap luc gay bieh dang l d n , p h a m v i cac u n g suat tap t r u n g x u n g quanh v u n g b i xao t r o n kien tao tang, nhiet ciia cac loai dat da tang, gia tang su n g u y h i e m k h i ddng dat, hoac thuong x u y e n c h i u aiih h u d n g ciia cac k h u v u c k h a i thac khac lan can D i e u k i e n dia chat phiic tap va khai thac m d , cung n h u k h i k h a i thac m o d sau dang ke, cac k y su phai ap dung cac giai phap cdng nghe dac biet [3] [ ] N h o m t h i e t ke d u d n g l d chuan b i t r o n g c d n g viec t h u o n g quan t a m den cac k i n h nehiem t h u d u o c tir t h u c te ciia cac v i a hav k h u v u c k h a i thac l a n can H o cune sir d u n e nhune chi dan c h i tiet ciia k h u v u c k h a i thac hoac tir k h a i thac m d khac da d u o c c h i i n g m i n h cu the h u u i c h t r o n g t r u d n e h o p t u o n e t u T i l T91 H o c i i n e cd the sir d u n e cac ket qua k i e m tra ciia cac n e h i e n c i i u d u d i l o n e dat \6] \7} T r u d n e , h o p nav t i n h h i n h h o i khac so v d i t r o n e t r u d n e h o p thiet ke m d v i a t r o n e d d c u n e can sd l i e u t r u v cao den sau l a m v i e c sau dd k h o n e c u n e cap sd l i e u khao sat c h i n h xac ciia k h a i thac m d v a cac dieu k i e n dia chat cd san khac D q d d t i n h chat dat da c h i cd the d u o c d u doan tren co sd sd l i e u ciia I d k h o a n khao sat n a m d k h o a n e each l d n tit 16 nav den l d k i a T r o n e dieu k i e n dd cd the xac d i n h l o a i h i n h c h d n g t h i c h h o p c h i bang p h u o n g phap t h o n g ke [10] hay phan t i c h so [ ] Bai bao trinh bay cac ket qua phan tich so lieu thuc hien nham ho tro thiet ke toi uu cho cac d u o n g 16 d dd sau 1.100m va 1300m Cac t i n h toan da g i u p t r o n g viec xac d i n h vi t r i duong 16, xac d i n h v u n g anh h u o n g x u n g quanh d u d n g l d , v i the cho phep dua cac gia dinh hd t r o t h i c h h o p de an t r o n g dieu k i e n thuc te Nhung thay doi lien quan den sau xung quanh duong 16 Do sau lam viec la mot nhung yeu to thiet yeu anh hudng den su dn dinh ciia duong 16 va, sau do, la su lira chon l a i h i n h chong 16 de ap dung D e xac d i n h cac bien the so luong cua k h o i l u o n g cua k h u vuc thiet hai, phan t i c h so duoc thuc hien bang each str dung tieu chuan H o e k - B r o w n [2] [ ] Do sau cua su xuat hien cua cac yeu to lam viec la mot nhung van de thiet yeu anh hudng den su d n d i n h cua n h o m va, sau dd, lira chon m o t loai ho t r o cu the duoc ap dung De xac d i n h cac bien the so l u o n g ciia k h o i l u o n g ciia k h u v u c thiet hai, cong tac phan tich so duoc thuc h i e n bang each sir dung t i e u chuan H o e k - B r o w n [2] [ ] D o n g t h d i , de cap chieu sau thuc te va t i n h chat ciia cac l d p thach hoc tai sau thiet ke d sau 1.100 m va 1.300 m da duoc gia d j n h K t qua phan t i c h duoc t r i n h bay n h u la ban cua ung xuat c h i n h t o i da v d i cac v u n g duoc danh ddu v i i n g deo 321 Hpi nghi Cong nghiep 2.1 Dudng khoa hoc ki thudt md quoc ti mo tien tiin vi su* phat trien Id Cw-1 tqi dp sau - 2010 bin virng 1100m Khoi ctat da trqng vung xung quanh duong 16 Cw-1 thuoc nhom khong dong nhat Tai noc va nen chu y e u bao e o m set ket va cat ket co dav khac B e chone d u o n g 16 nav dune theo h i n h L P J / V - t v p e (co Re = 480 M P a ) buoc c h n g 1,0 met v a neo dai met neo vao noc tai cho h a i k h u n g thep each ( H i n h 1) Hinh So" chong cho dudng Id Cw-1 (tren Id NEO ddi met) M6 hinh so gia dinh rang 16 eom cac lop sau 0.6 m cua lop set ket than 1.9 m va 1.3 m cua l o p set pha cat ket T r e n noc 16 la 16r> da p h i e n set dav met co tren l o p nav la 16r> cat ket v o i dav 14 m co l o p than kep dav 0.4 m O tren lop sa thach N e n 16 la m o t l o p da set ket dav met d u o i co m o t l o p 5.9 met set pha cat T h e m vao 11.6 met va 6,5 met sa thach da p h i e n set pha cat B a n g cac t h o n g so gia d i n h cua d i a tang Bdng Tham sd cua ldp dd cho md hinh sd cua dudng L o p da Ty /[kN/m ] lan cat ket l o p nav la la da phien trinh bay Id Cw-1 M o d u l dan hoi E [MPa] He so Poisson v D6 ben nen R [MPa] c T h a m so Hoek-Brown m T h a m so HoekBrowns Than 12.032 1800 0.30 6.104 0.821 0.0004 Set ket/ Cat ket 25.805 5000 0.26 44.458 1.094 0.0014 Cat kk 26.178 7000 0.24 51.459 1.436 0.0018 Sa thach 25.514 11500 0.22 56.789 2.908 0.0075 322 Hpi nghi Cdng nghiep khoa hoc md tien kT thudt tien md qudc vi su phat te - trien 2010 ben viing Phan t i c h , u n g sudt tai m o t d i e m tap trung cua 16 u n g suat ( a khoang each vai met) cho thay gia t r i la 42 M P a ( x e m H i n h ) U n g suat g i a tang tai v u n g nhat d i n h t i n h tir mep 16 t r o n g v i i n g deo cua l o p dat da bao quanh d u o p g 16 V i v a y d i e u l i e n quan den viec d u o n g 16 b i de doa va can phai chong V i e c t r u y e n tai t r o n g l u o n g k h o i da gay chi xay ngoai k h u deo bao quang d u o n g 16 T a i nen 16 cung t u o n g t u n h u vay, u n g suat cung gia tang t r o n g khoang each la m , dat gia t r i gan 40 M P a N h u v a y cac u n g suat tac dong co the gay bien dang noc v a nen cua d u o n g 16 Pham v i anh h u o n g k h u deo cua noc 16 khoang 3,2m, nguyen nhan chu y e u la b i b i e n dang T a i 16 v u n g anh huong len den 5,3m, nen 16 khoang , m M a c d u v u n g anh h u o n g I o n n h u vay, n h u n g c h i can chu y den nen 16, v u n g khac k h o n g quan t r o n g , v u n g 16 cung vay tai v u n g bien dang va ap l u c m a n h co the gay su pha huy d u o n g 16 Hinh Viing dnh hudng cua ung suat viing deo xung quanh dudng lb Cw-\ Trong truong hop cua duong 16 Cw-1 xet nehiem tai mo than (do dac tai cho) da duoc tien hanh sau k h i t h i cone 16 xone Cac xet n e h i e m chap nhan l i e n alia, dac v i i n e anh huone va tai trone tac done nen neo noc (Bane 2) So sanh cac l u c tac done nen neo noc thu duoc va ket qua thir n e h i e m cho thay ro rang rane eia t r i tai trone nen neo noc trone truone hop t r u o c dav (tuc la xac d i n h bane phuone, tien t i n h toan so) la cao h o n so v o i tai^cho D i e u ei da eav su khac biet eiua cac ket qua t h u duoc, tir k i e m d i n h dac tai cho v o i ket qua phan t i c h t i n h toan co gia t r i thap h o n so v o i thuc te Bang So sach kit qua kiem nghiem thir nghiem Cw-1 (Via 401) ' Phan tich/do dac tqi chd vdi kit qua phan K i e m n g h i e m tai cho tich ky thudt so dudng Phan t i c h k y thuat so Pham v i anh h u o n g f [ m ] 4.70 3.20 Luc toi da cua neo noc Nk [ k N ] 105 280 s 2.2 Lb xuyen via d dp sau lo 1.300m K h i sir d u n g p h u o n g phap phan t i c h k y thuat s6 gia thiet dia tdng t r o n g v u n g l a m viec nhu sau: l o p set ket co day 3,5m, l o p sa day 0,6m, l o p sa thach tren noc 16 323 Hoi Cong nghi khoa nghiep hoc mo tien kT thudt tien mo qudc vi su phat ti triin - 2010 bin viing day 0,4m, tiep la v i a t h a n day , m sau la l o p set k i t d i y , m D i a tang tiep sau g m cac l d p sau: sa thach day 7,8m, cat ket day 6,5m, t i l p la set k i t , m , sa thach day 2,0m, 0,2m l d p than kep v a , m set ket Cau true nen cua d u o n g 16 la l d p set ket day 5,5 m lan t r o n g la l d p than kep day 0,8m Cac gia t r i gia d i n h cua cac l d p d u o c t r i n h bay Bang Bdng Dir lieu dia tdng cho phuong Loai dat da Modul E [MPa] Chi so GSI phap phan H f so Poissonv tich sd Ung suat nen a [MPa] c Tham so Hoek-Brown Khong doi m b Tham so Hoek-Brown Khong doi s Than 3500 40 0.30 10.54 1.374 0.0013 Set ket pha cat Cat ket Sa thach 10000 15000 17878 50 60 65 0.26 0.24 0.24 60.73 94.00 71.55 1.677 2.157 4.298 0.0039 0.0117 0.0205 D e dat d u o c su d n d i n h cua cac d u d n g 16 l a m viec sau 1.300 m , t r o n g t i e m thirc n g u o i thiet ke p h a i co mot d u doan la t r o n g v u n g b i e n dang deo x u n g quanh d u d n g 16 se xay nhieu d i c h c h u y e n anh h u d n g n g h i e m t r o n g den v i t r i d u d n g l d t r o n g , l o n g dat, nen cd p h u o n g an c h d n g 16 p h u h o p d u t i n h t r u d c , V i d u : c h o n l o a i k h u n g chong theo hinh 11 / V L P Z (co Re = 480 M P a ) - loai k h u n g chong v d i k h o a n g each b u d c chdng la 0.5 m ciing v d i hai hang neo dang cap cd b u l o n g neo vao noc v a m o t hang neo thep neo vao hong 16 N g o a i ra, c o n dirng giang bang k i m loai g i u a h a i hang neo v d i (Hinh 3) Hinh So chong Id cua Id xuyen via Dung phan tich sd cho thay,ring anh hudng ciia viing bien dang deo^ se xuat hien k h i dao cd d u o n g v i e n : len den , m tai v u n g noc 16, t d i , m v u n g nen, va len den 324 Hoi Cong nghi nghiep khoa hoc md tien ki thudt tiin md quoc vi su phat te - trien 2010 hen vung 2,0m tai v u n g hong 16 ( H i n h A) Cac gia t r i cua sir i m g suat c h i n h t o i eta dat 50 j - 55 M P a , n a m phan phia duoi nen, cung n h u t r o n g phan tren ciia hong 16, khoang each khoang 1,5m tir mep 16 r Cac gia tri tinh toan cho thay co nhieu sir lech v i t r i : dao dong t u 0,07 den 0,08m d o i v o i nen va hong 16, va 0,05m d o i v a i noc 16 ( H i n h 5) Them vao do, d u k i e n da ro la can phai chong 16 dong t h a i v a i cong viec dao co ap dung chong neo se cho k i t qua tot, tir lire tac dung nen neo se xac d j n h dugc luc t o i da neo phai chiu tren chieu dai neo Hinh Vung bien dang deo xung xuyen via quanh dudng Id Mot so ket luan Cac ket luan sau day co the dugc rut tren ca sa phan t i c h t r i n h bay tren: Chong 16 can dugc thiet ke rieng biet va dac biet c h u trgng thuc trang khai thac va dieu k i e n dia chat, cung n h u sir dung cac dir d i n h va uoc t i n h t h a i gian t o n tai cua duong 16 khoang t h a i gian nhat dinh V e mat nay, dac biet nep dugc chu y de cap g i a i thiet ke cac d u o n g 16 nam k h u v u c kliai thac m o va dieu k i e n dia chat phiic tap Hinh Ban bien vi xung quanh lb xuyen via Thuc hien cac phuang an chong 16 phai dua tren mot loat cac thir nghiem mo, ma nen cho phep de xac m i n h nhung gia dinh truoc do, chap nhan va de danh gia tinh trang uhuc te cua cac yeu to cu the vat lieu chong va yeu to cua k h o i da x u n g quanh duong 16 Trong truang hgp thiet ke dieu kien mai hoan toan (tuc la chua co truang hap t u o n g t u , v i du, k h u m a i , mire dao sau han), phdi phan t i c h , t i n h toan de c h i i n g m i n h dugc rang so chong d u o c lira chgn la hieu qua nhat T u y nhien, k h i dao 16 phai thuang x u y e n danh gia t i n h chat co l y ciia da, k i e m tra t h u a n g x u y e n sir t u a n g tac ciia dia tang v o i vat l i e u chong N e u can t h i phai thay d o i so chong cho p h u hop Khi dao chong 16 sau dang ke lai dieu kien dat da co ben thap, can dugc gia co chong bo sung bang v i neo deo D u n g v i chong thep h i n h day d u cho phep han che su d i c h chuyen v i t r i 16, dac biet nen 16, neo cp ket n o i bang nep se dam bao them cho su on d i n h T a n g c u o n g chong cho noc 16 bang neo noc se g i u p g i a m bat k h u vuc anh huong va d u o n g nhien tren thuc te, de g i a m tai nen v i chong 325 Hoi Cong nghi nghiep khoa hoc mo tien ki thudt tiin md quoc vi su phat te - trien 2010 bin vung Ket luan Thiet ke toi uru cho cong tac chong 16 cho cac duong 16 mo than, dac biet dieu k i e n ap lire dat da m a n h , la m o t cong viec rat kho khan cho cac k y s u t r o n g cac cong ty k h a i thac than K h o n g c h i dua va cac k i n h n e h i e m thuc t£ t h u d u a c cdc k i n h nehiem nav dane tiep tuc hoan t h i e n m a c o n n h i e u c o n nhieu eiai phap m a i l i e n quan den van de cune d u a c t h u c h i e n B a i , viet nav t r i n h bav ket qua cua p h u a n e phap phan tich so nham ho t r g cong tac thiet ke t o i u u cac d u o n g 16 sau 1.100m va 1.300m Tai lieu tham khdo Engineer Manual 1110-1-2907: Engineering and Design ROCK REINFORCEMENT Department o f the A r m y U S A r m y Corps o f Engineers, 1980 Hoek E., Carranza-Tores C, Corkum B.: Hoek-Brown failure criterion - 2002 edition Proceedings o f N o r t h A m e r i c a n R o c k Mechanics Society, M e e t i n g i n Toronto, 2002, http://wvvvv.rocscience.com/hoek/references Hoek E., Kaiser P.K., Bawden W.F.: Support of underground excavations in hard rock B a l k e m a , R o t t e r d a m 1995, p 215 Hoek E., Marinos P.: A brief history of the development of the Hoek-Brown failure criterion Soil and Rocks, nr 2, 2007, http://www.rocscience.com/hoek/references Jing L., Hudson J A.: Numerical methods in rock mechanics International Journal O f R o c k Mechanics & M i n i n g Sciences nr 39, 2002, s 409-427 Majcherczyk T., Malkowski P., Niedbalski Z Measurements of roof support load in headings: in situ research T e c h n i c a l , technological and economic aspects o f thin-seams coal m i n i n g : International M i n i n g F o r u m 2007 / eds Eugeniusz J Sobczyk, Jerzy K i c k i — L o n d o n , [etc.]: T a y l o r & Francis, cop 2007 p 37^46 Majcherczyk T., Malkowski P., Niedbalski Z.: Rock mass movements around development workings in various density of standing-and-roof-bolting Coal Science & E n g i n e e r i n g ( C h i n a ) ; 2008 v o l 14 no p - support Journal of Majcherczyk T., Niedbalski Z., Malkowski P.: Symptoms of rock pressure: in situ research N e w challenges and visions f o r m i n i n g : 21st W o r l d M i n i n g Congress : 7-12 September 2008, Poland, K r a k o w - K a t o w i c e - S o s n o w i e c / eds Eugeniusz J Sobczyk, Jerzy K i c k i — L o n d o n [etc.] : C R C Press/Balkema, cop 0 , p - Rock Mechanics Technology Ltd: Coal mine roadway support system handbook Research Raport 229a, H S E B o o k 2004, p 67 10 Sheorey P.R.: Empirical Rock Failure Criteria A A Balkema, R o t t e r d a m / B r o o k f i e l d , 1997; p 176 326 ... e u chong N e u can t h i phai thay d o i so chong cho p h u hop Khi dao chong 16 sau dang ke lai dieu kien dat da co ben thap, can dugc gia co chong bo sung bang v i neo deo D u n g v i chong... thep h i n h day d u cho phep han che su d i c h chuyen v i t r i 16, dac biet nen 16, neo cp ket n o i bang nep se dam bao them cho su on d i n h T a n g c u o n g chong cho noc 16 bang neo... i a m tai nen v i chong 325 Hoi Cong nghi nghiep khoa hoc mo tien ki thudt tiin md quoc vi su phat te - trien 2010 bin vung Ket luan Thiet ke toi uru cho cong tac chong 16 cho cac duong 16 mo