J, Tap chiKHKTMo - Bia chdt, sd31, 712010, tr.93-95
PHAN TICH TAI TRONG CONG TAC CUA GIA KHUNG DI DONG ZH1600/24/16Z TAI LO CHOf IB VIA 5 TAY VANG DANH
BUI MANH TUNG, DINH THI THANH NHAN, TRAN VAN THANH
Trudng Dgi hgc Md - Dia chdt
Tom tat: Trong nhimg nam gdn day, vi chdng gid khung di dgng ZHl 600/24/16Z da dugc dp dung rgng rai trong cdc Id ehg. Kit qua quan sdt thuc ti cho thdy cdc Id cho su dung logi gid chdng ndy khdng nhimg ndng cao dugc sdn lugng khai thdc md cdn ndng cao dugc tinh an todn cho ngudi vd thiit bi ldm viec trong Id ehg. Nghiin ciru trin thuc ti Id ehg IB via 5 Cdng ty Cd phdn than Vdng Danh da chimg td gid cd thi ddp irng dugc tdi trgng cdng tdc. Tuy nhiin trong cdc trudng hap diiu kien dia chdt phirc tgp cdn dp dung mot .so biin phdp cu thi khdc phuc nhimg su cd xdy ra.
1. Mddau
Ld ehg 1B thudc via 5 khu tay Vang Danh, cd chieu dai 106m, chieu day va gdc ddc trung binh via la 7,2m va 27", chieu dai theo phuong 180m. Via cd cau tao phiic tap tii' 2^3 ldp da kep day tii' 0,08-^ 3,21m. Do sau khai thae la 250-^300m. Cau tao cua vach true tiep la Alevrolit cat ket ran chac, day tii' 5^1 Om, trung binh 7,5m, cd do phan ldp tir 0,2-^1,Om, cudng do khang nen 600^1500 KG/cm". cd Idp vach gia la Agrilit va Agrilit than bd rdi, sap dd ngay sau khi khau guong Id ehg, chieu day trung binh 0,l^0,2m. Cau tao cua vach ca ban la Alevrolit cat ket, day tir 35^45m, trung binh 40m, cd do phan ldp tii' 0,5-^1,5m, cudng do
khang nen 600-1500KG/cm^ rlt de hinh thanh dam chiu luc va diit gay theo tien do Id ehg.
Cau tao ciia da tru true tiep chii yeu la Acgrilit it hon la Alevrolit cat ket tuong ddi viing chac dn dinh den rat dn dinh, chieu day tii' 2,0^4,0m.
2. Thong so ky thuat cua vi chong ZH 1600/24/16Z
Ld ehg gia di dgng dang khung dugc cap dich thdng qua tram bom nhu hoa. Cac thdng sd ky thuat ciia vi chdng nay tuong ddi hgp ly, cau ket tien tien, hieu qua chdng giu' cao, tinh nang chdng giu' tdt. Toan bd chieu dai Id ehg sii' dung
102 gia chdng giu da vach Id ehg. Dac tinh ky thuat chii yeu ciia gia nhu bang sau:
Bang 1. Dac tinh ky thuat chu yeu ciia gia di ddng dang khung ZH 1600/24/16Z TT
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
Ten chi tieu Chieu cao tdi da
Chieu cao tdi thieu Hanh trinh piston Chieu rdng vi chdng Chieu dai vi chdn"
Bude tien tam chan guong Sd cot thuy luc ciia gia Tai trgng ban dau Idn nhat' Tai trgng lam viec
Ap suat tram bom Du'dng kinh xilanh ciia cot Cirdno do chdng da Gdc ddc lam viec
Goc ddc lam viec theo phucmg Dudng kinh de phu ciia cot Khoang each tir tam giua 2 gia
Dan vi mm mm mm mm mm mm cai kN kN MPa
mm MPa
Dd Do mm mm
Tri sd 2400
1600 800 960 2900
800 4 950 1600 31.5 110 0.52
<35 15 26-30
1020
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3. So' do cong nghe khai thac trong Id ehg - Phuong phap khai thac: Ld ehg su dung he thdng cdt dai theo phuong. cdng nghe khiu than bang khoan nd min. ha tran than vach, chong Id blng gia DDDK ZHl600/24/16Z. di6u khien da vach bang pha hoa toan phan.
HO CHjgU LO CHO GIA KHUNG Dl DONG -1B V5 TVD L6 doc via thong gio
L6 doc via van tai
Hinh 1. Hd chieu chdng Id ehg gia khung didgngZH 1600/24/16Z
4. Quan trac ap md va phan tich tinh thich nghi ciia gia chong:
4.1. Vi tri do tdi trgng cong tdc gid khung trong lb cho
Cac tram dugc dat dgc theo hudng ddc Id ehg thdng qua 6 gia chdng: gia 6,16,40,63,75 va gia 84. Thiet bi do sir dung ddng hd do ap lire tu ddng ma hieu MC 010027 do Trung Qude san xuat. Thdi gian do va thu thap sd lieu la tir ngay
1/1 dan ngay 31/1/2009.
4.2. Phan tich tdi trgng cong tdc cua gid khung
Thdng qua xii ly sd lieu do quan trie tai trgng cdng tac cua 6 gia chdng trong Id ehg.
Quy luat bien ddi tai trgng cdng tac cua cac gia chdng theo phuang va hudng ddc Id ehg dugc the hien nhu sau:
'/•Ny *->-,.• V,
;/V«r ^ \ ^
V '•• ^ ^ " ^ V ^
0 1 '\~M ''B< -K
#6 - • - 9 1 6
—4—#40 - & - # 6 3 - • — # 8 4
0 3 6 e 12 15 18 21 24 27 30 33 36 39 42 45 O n ^ dai theo phiTC'ng' m
Hinh 2. Quy luat bien doi tai trong cong tac cua gia khung theo phuo'ng 16 ehg
Tai trpng/
Ld chv tCi- vj tri bAt dku L6 ch(7 WiAu 21 m Ld chi? khAu 4Sm
60 80 100 ChiAu ddi Iheo hining d6c/m
Hinh 2. Quy luat biln ddi tai trgng cdng tac ciia gia khung theo hudng ddc Id ehg Bang 2. Bang thdng ke tai trgng cdng tac
cua gia khung
Vi tri do Gia 6 Gia 16 Gia 40 Gia 63 Gia 75 Gia 84
Thdi gian do: 1/K31/1/2009 Tai trgng
min/MPa 13.5 15.5 11.9
\ 12.6 14.5 13.0
Tai trgng max/MPa
15.2 18.7 16.5 14.5 17.7 18.4
Tai trgng trung binh/Mpa
14.3 17.1 13.2 13.6 16.1 15.7 Til' ket qua phan tich cho thay, binh thudng tai trgng cdng tac ciia gia khdng Idn, nhung khi da vach djch chuyen thi tai trgng cdng tac cua gia se tang len. Nguyen nhan chinh d day la do ket cau ciia da vach va chieu cao khau quyet dinh. Quy luat dich chuyen ciia da vach quan sat dugc tuong ddi rd ret, anh hudng ciia da vach ca ban len gia chdng tuong ddi nhd ma chu yeu la do vach true tiep (bao gdm ca phan than ha tran) gay nen. Tai trgng cdng tac ciia gia chua vugt qua tai trgng tdi ban, kha nang chju tai cua gia Idn ban yeu cau cua Id ehg.
Ddi vdi cdng tac dieu khidn ap luc Id ehg, khdng ch6 tinh on djnh ciia da vach la muc dich quan trgng. Dd dam bao tinh dn djnh ciia da vach trong khdng gian Id ehg ap dung mot sd bien phap sau:
1, Khi khIu guong than cIn dam bao blng thang, kjp thdi di chuyin gia, tranh hien tugng dat da ndc tut Id xudng Id ehg.
2, Can phai dam bao tai uong chdng giir ban dau ciia gia, tranh hien tugnL ich true tiep san sinh phan ldp.
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3. Khi di chuydn gia cIn phai cung cd chit do dilu kien dia chit Id ehg phirc tap. ddi hdi tai cho cac gia liin kl, ngan ngira dlt da vach cIn sira chua, thay thi cac linh kien thu\ luc rat do bj dd tai djch chuyen tao hien tugng tut ndc. tdn kem. Vi vay cIn phai ap dyng cac giai phap Dat da vach tut Id. chu ylu la do^chilu cao khic phuc kip thdi dl han chi tdi da thdi gian khau khdng dam bao, tai trgng ban dIu cua gia ngirng tre, nang cao nang suat va an toan trong khdng dat so vdi yeu clu tren thuc tl. Do ^d qua trinh khai thac than Id ehg.
neu Igi dung tot cac dac tinh cua gia thi ed thi ,.' • •
khicphuchien tugng sap Id cua da vach. TAI LIEU THAM KHAO Ngoai ra. til'dac diem chju tai ciia gia ed thi
thay, tai trgng ciia gia khdng ddng dIu. Day cd [1]. Phiing Manh Dac, Nguyen Anh Tuan. Ket the la do su phan bd ap lire da vach biln ddi qua ap dung thir nghiem cdng nghe ca gidi hoa theo hudng ddc ciia Id ehg tao nen. Tu\ nhien khai thac d mot sd md than ham Id Quang Ninh.
cung khdng loai trir kha nang bom ap luc cot Vien khoa hgc cdng nghe.
giua cac gia khdng ddng dIu. [2]. Nguyen Anh Tuan, Truong Diic Du. Tran 5. Kit luan Tuan Ngan. Tdng hgp ket qua ap dung vi chdng Qua kit qua phan tich, trong dilu kien dia thuy trong khai thac than ham Id Viet Nam.
chit tai Id ehg IB via 5 Tay Vang Danh. tai Vien khoa hgc cdng nghe md.
trgng cdng tac ciia gia khdng Idn, cac chi tiet [3]. Wang JingBing, Jiang WenJie, Wang cua gia linh hoat va cd the dap ung dugc qua Shaohua. Ung dung gian chdng co' khi hoa ZY- trinh chdng giu' trong Id ehg. Tuy nhien khi ap 4000/10/23 trong via mdng. Tap doan khai thae dung vao thuc te ciia da phat sinh mot sd su cd khoang san Duyen Chau Trung Qude.
SUMMARY
Analysis of pressure rule of sliding frame support
ZH 1600/16/24Z at IB production face- seam No5 , Tay Vang Danh Bui Manh Tung, Dinh Thi Thanh Nhan
Tran Van Thanh Univesity of Mining and Geoloiy
In the recent years, the hidraulic frame support ZH/1600/16/24Z was spacious used in coalfaces. The result of fact inspection showed that using this frame support not only improve ifs productivity but also improve safety for workers and equiment in the coalface. The research of the IB production face-seam No5, Tay Vang Danh evidenced, this frame support could demand for pressure in the coalface.However, in case of complicated geology, we must apply some specific methods to over come the problem which could happen.
Ngudi phan bien: Ddng Vd Chi
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