Institut za rudarstvo i metalurgiju Bor

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COMMITTEE OF UNDERGROUND EXPLOITATION OF YU ISSN: 1451-0162 THE MINERAL DEPOSITS UDK: 622 UDK: 622.1:550.8(045)=20 Milenko Ljubojev*, Mevludin Avdić ** , Vesna Ljubojev*, Dragan Ignjatović*, Lidija Đurđevac Ignjatović* OBSERVATION OF CHANGES AND MEASUREMENT OF SUBSIDENCE ON THE COLLECTOR UNDER THE OPEN PIT “BOGUTOVO SELO“ IN UGLJEVIK Abstract Collector presents one of the most important facility for water collecting from water currents located nearby mine. Due to this it is important to investigate all factors that have influence on its stability and continuance. It is also necessary to carry out the periodical measurements and observations of collector condition and take measures for repairing the new damages. This paper presents the results of measurements and observation the collector condition under the open pit “Bogutovo selo“ in Ugljevik, that would be also applied to the Kriveljska river tunnel in Bor. Key words: collector, stability factor, periodical measurements INTRODUCTION Construction of underground facilities, such as tunnels and collectors, requires a complex approach to the problem solution. The ideal environment for tunnel construction is isotropic environment that is almost impossible in practice. Also, we faced with next situation: rooms (tunnels), constructed under projected conditions, are over time in completely different, changed conditions. These changes are, mainly, related to a change of vertical component of loads (exp. dike construction over the tunnel). Load changes above the underground facility will cause a stress – deformation change of the massif, what can result in a weakness of object or its parts (appearance of cracks, cleavages or collapse). The first exposed parts are areas, which are in engineering and geological terms classified in the zones of risk. Therefore, the * Mining and Metallurgy Institute, Bor ** MGCF-University of Tuzla, B & H impact of changes in a value of vertical component has to be defined. MEASURING SUBSIDENCE OF COLLECTOR Measuring subsidence of collector was carried out by the precise levelling instrument with the accuracy of registration shift of 0.1 mm. Metal bench marks are fixed on the roof of collector in a mutual distance of 23.0 to 50.0 m, along the entire length, starting from the axis of dam to the exit, according to previously established subsidence of collectors. Very similar intensity of lowering ceiling panels was observed in the previous measurements. It is characteristic that collector exit (ceiling) rises as it is shown by the results of measurement at one of the No 1,2010. 31 MINING ENGINEERING
ench marks, and they amount from +14 mm to +65 mm. Despite the high accuracy of measurement, results get this way are unreliable. It is necessary to set the bench marks near entrance and exit of the collector, which would be related with the State trigonometric network and had absolute elevation. This method could make an adjustment of levelling vane, counting tolerance, since it is a big levelling vane with length of more than 4 000 m. Levelling of floor and roof of the collector is necessary as well as observation of their mutual behaviour. NUMERICAL ANALYSIS OF COL- LECTOR CONSTRUCTION CONDI- TION ON ITS MOST ENDANGERED PART Numerical collector model, in length of 332 m, is presented in Figure 1. Elements of base, collector construction and dumped material are separated by colour. Pressure stresses are indicated with a negative sign. Figure 1. Numerical model of collector longitudinal section with final contour of dumped material Figure 2. Shear stresses in collector construction in the function of dumped material No 1,2010. 32 MINING ENGINEERING
Page 2 and 3: INSTITUT ZA RUDARSTVO I METALURGIJU
Page 4 and 5: KOMITET ZA PODZEMNU EKSPLOATACIJU Y
Page 6 and 7: Analizirajući ovaj način uzorkova
Page 8 and 9: SADRŽINA UPROŠĆENOG RUDARSKOG PR
Page 10 and 11: COMMITTEE OF UNDERGROUND EXPLOITATI
Page 12 and 13: area is constantly increased. Figur
Page 14 and 15: CONTENT OF THE SIMPLIFIED MINING PR
Page 18 and 19: U morfološkom smislu, teren predst
Page 20 and 21: Rezultati terenski istraživanja i
Page 24 and 25: In morphological terms, the terrain
Page 26 and 27: GEO-MECHANICAL FEATURES OF THE TERR
Page 30 and 31: Sl. 3. Smičući naponi u konstrukc
Page 32 and 33: Na modelu bojom su razgraničeni od
Page 36 and 37: Figure 3. Shear stresses in collect
Page 38 and 39: Dumped material and collector eleme
Page 42 and 43: PODRUČJE ISTRAŽIVANJA Aleksinačk
Page 44 and 45: Da bi se izbor otkopne mehanizacije
Page 46 and 47: lansnih rezervi uglja, a druga za g
Page 48 and 49: veličina i takođe zahteva neophod
Page 52 and 53: exploitation, two variants of this
Page 54 and 55: esses, require the use of modern sy
Page 56 and 57: • method without underground room
Page 58 and 59: directly used to drive power plants
Page 62 and 63: gde je: Δ - nasipna masa uzorka; m
Page 64 and 65: D (%) 100 90 80 70 60 50 40 30 20 1
Page 68 and 69: Where is: Δ - volumetric density o
Page 70 and 71: D (%) 100 90 80 70 60 50 40 30 20 1
Page 74 and 75: PRORAČUN STABILNOSTI SOFTVEROM GEO
Page 76 and 77: Sl. 6. Izgled klizne ravni i koefic
Page 80 and 81: CALCULATION OF STABILITY BY THE SOF
Page 82 and 83: Figure 6. View of sliding plane and
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KOMITET ZA PODZEMNU EKSPLOATACIJU Y
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kon sulfatizacije, postignut je sle
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COMMITTEE OF UNDERGROUND EXPLOITATI
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Table 2. Degrees of metal leaching
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70%. Dreniranje izdani vrši se po
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do kote K+656 m gde su postavljene
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is very abundant feeding aquifers.
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Start-minute maximum intensity of d
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Figure 3. Operation diagram of pump
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Zlato u koncentratu kg - 27,988 12,
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Na samlevenim uzorcima topioničke
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Dry concentrate t 5,226 10.563 5.82
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Sadržaj klase -75μm , % 100 80 60
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Tab. 1. Koordinate temena eksploata
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Eksploatacija ležišta rude bakra
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Figure 3. Mutual position of open p
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underground water in the first wate
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gde su: v r - brzina protoka: u r -
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z and r - cylindrical coordinates
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da zaštiti podzemne vode od kontam
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• Otpadne vode od samog postrojen
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Practically, the “in-situ” expl
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• Waste water created during the
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geotektonska zona prema severoistok
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Osmatrani režim izdašnosti i temp
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Sl. 4. Kružni dijagram hemijskog s
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15. Nikl (Ni) 0,012±0,00500 UP-919
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alneoterapijskih i sportsko-rekreat
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phase are presented by andesite bas
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Figure 1. Hydro-geology maps of the
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Spring 2 Figure 3. Circle diagram o
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12. Lead (Pb)
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ecreational activities. The beginni
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UTICAJ GRANULOMETRIJSKOG SASTAVA ML
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SADR@AJ CONTENS D. Sokolović, D. E
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Institut za rudarstvo i metalurgiju Bor

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