2 edition of Effects of ancient stream channel deposits on mine roof stability found in the catalog.
Effects of ancient stream channel deposits on mine roof stability
David K. Ingram
|Statement||by David K. Ingram and Frank E. Chase.|
|Series||Report of investigations / United States Department of the Interior, Bureau of Mines ;, 9092, Report of investigations (United States. Bureau of Mines) ;, 9092.|
|Contributions||Chase, Frank E.|
|LC Classifications||TN23 .U43 no. 9092, TN288 .U43 no. 9092|
|The Physical Object|
|Pagination||33 p. :|
|Number of Pages||33|
|LC Control Number||86600403|
THE EFFECT OF WATER TABLE ELEVATION ON ACID MINE DRAINAGE FROM REACTIVE TAILINGS: A LABORATORY AND NUMERICAL MODELING STUDY1 M. Ouangrawa2, J. Molson2, M. Aubertin2, G. Zagury2, and B. Bussière3 Abstract. Laboratory column experiments and numerical simulations are used to evaluate the effectiveness of an elevated water table as a management and. Volcanic-Associated Massive Sulfide Deposits: Processes and Examples in Modern and Ancient Settings. Paper 7: Stable Isotopes and Their Significance for Understanding the Genesis of Volcanic-Hosted Massive Sulfide Deposits: A Review. to be addressed: (1) mine dewatering requirements; (2) stability of pit walls or developments; and (3) environmental impacts on groundwater levels and on groundwater quality, during mining and post-mining periods. Groundwater modelling has become a tool commonly used to analyse, estimate and predict those impacts. File Size: KB. The stability of opencast mine slopes is important for the safe and economic mining operations. The practical approach to slope stability is guided by the basic geological data, geo-technical characteristics of the slope mass, ground water details and a good measure of engineering judgment. The paper presents in brief the slope stability studies conducted by the author indifferent Indian.
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Get this from a library. Effects of ancient stream channel deposits on mine roof stability: a case study. [David K Ingram; Frank E Chase; United States.
Bureau of Mines.]. Effects of ancient stream channel deposits on mine roof stability: a case study "The Bureau of Mines conducted underground mapping and rock strength tests to describe and analyze mine roof conditions surrounding ancient stream channel deposits (paleochannels) in the Pittsburgh coalbed in southwestern Pennsylvania.
Effects of horizontal Cited by: 2. Effects of ancient stream channel deposits on mine roof stability: a case study. Personal Author: "The Bureau of Mines conducted underground mapping and rock strength tests to describe and analyze mine roof conditions surrounding ancient stream channel deposits (paleochannels) in the Pittsburgh coalbed in southwestern Pennsylvania.
Effects of ancient stream channel deposits on mine roof stability Technical Report Ingram, D K ; Chase, F E The Bureau of Mines conducted underground mapping and rock strength tests to describe and analyze mine roof conditions surrounding ancient stream channel deposits (paleochannels) in the Pittsburgh Coalbed in southwestern Pennsylvania.
Information on the roof composition was obtained from the mine personnel. These data included aspects such as the type and thickness of the roof beds, the location of prominent bedding planes and any other factors that impact roof stability under operational conditions. The condition of the roof was visually assessed.
Observed. serviceability of the mine openings (MOSHAB, ). Ground control in limestone mines can be complex because the entries are fairly wide and have large heights.
Rocks falling from a high roof have signiicant injury potential. During a survey of roof stability issues in. Title: SPR(2): Effects of In-Stream Mining on Channel Stability—Volume II: Final Report Author: ADOT Created Date: 4/25/ PM. The study area is located in the mine field of Faer Coal Company, Guizhou Province, China.
Inafter the inclined parts of the tunnels were completed, the landslide was found without prior notice; later ina targeted exploration allowed to further identify the landslide as an ancient Effects of ancient stream channel deposits on mine roof stability book ().During excavation, the surrounding rocks of two tunnels presented large deformations with Cited by: Ancient mining techniques go well back into our history – well back into our.
prehistory, in fact. As we progressed through the Stone Age, with more and. more sophisticated tools and weapons being designed and developed, so too, our need for more and better raw File Size: 24KB. blasts of the suriace mine, shared moments of "fear and trembling" in sweat, silence, and darkness, and, above all, aided him in removing the myth uf 11i1~ cannot be done11 and proving that the ancient profession of mining engineering, the inner space engineering, is alive and well and at its best.
Recognition of upper-bar deposits and their transition into natural-levee and/or floodplain deposits defines the maximum bankfull channel depth from which channel width and channel-belt width are Author: Frank Ethridge.
Large Effects of ancient stream channel deposits on mine roof stability book roof strata caving that occurs during coal extraction can irreversibly damage floor strata and result in riskier mining operations.
Four research models incorporating floor water pressure were assessed for floor strata failure, using eight methods and two classification systems.
A connection between floor strata failure and the coefficient of impact risk was by: (b) Channel Deposits. As previously mentioned, when water flows through a meander, erosion takes place along the channel wall on the outside of the curve. material and is indicative of channel deposits. Given the discontinuity of ephemeral stream systems (Bull, ), we observed spatial hetero-geneity in the wadi banks.
The width of the valley ﬂoor is highly vari-able: it amounts to only ~ m between the rock shelter and Rock Selloum (Fig. 2a), but rapidly increases downstream, where channel.
Huge water diversion projects drained the sea of 90% of its water. Salinity has tripled, and most of the animal species have disappeared. The dried-up seabed releases harmful chemicals into the air that have caused health problems for locals, the local fishing economy has totally collapsed, and the water continues to be diverted for agricultural uses.
Reclamation, Treatment and Utilization of Coal Mining Wastes, edited by A.K.M. Rainbow Elsevier Science Publishers B.V., Amsterdam, -- Printed in The Netherlands AN INVESTIGATION INTO THE RECLAMATION OF OPENCAST BACKFILLED SITES DESTINED FOR ROAD CONSTRUCTION I N THE UNITED KINGDOM R.
Singh, : R.N. Singh, F.I. Condon, S.M. Reed. Ancient ephemeral stream deposits: A local terminal fan model from the Bunter Sandstone Formation (L. Triassic) in the Tonder-3, -4 and -5 wells, Denmark. Mining is the extraction of valuable minerals or other geological materials from the earth, usually from an ore body, vein or (coal) seam.
Materials recovered by mining include base metals, precious metals, iron, uranium, coal, diamonds, limestone, oil shale, rock salt and material that cannot be grown through agricultural processes, or created artificially in a laboratory or.
Channel deposits indicate running water: they form on alluvial fans, in rivers, on deltas, even in submarine fans. Both of these photos are of channels in alluvial fan deposits (note how coarse the rock is). The red dashed line on the right shows the channel. the orange lines show bedding beneath the channel.
Notice how it is cut by the channel. This study investigates the geochemical characteristics of the acid mine drainage discharged from the abandoned mine adits and tailing piles in the vicinity of the Lousal mine and evaluates the extent of pollution on water and on the stream sediments of the Corona stream.
Atmospheric precipitation interacting with sulphide minerals in exposed tailings produces runoff water Cited by: sified as a coarse bed load stream, deriving much of its present sediment load from channel sources (Grimshaw and Lewin, ).
The river channel actively migrates across the alluvial sections except where confined by road, railway or valley side. Into this active fluvial system, mining wastes have.
study of stability of overburden dumps mixed with flyash in an opencast coal mine a thesis submitted in partial fulfillment of the requirements for the degree of bachelor of technology in mining engineering by raj chakravarty mn under the guidance of dr.
jayanthu and. The research is intended to determine the massif stability around mine workings. International Journal of Applied Engineering Research ISSN Vol Number 20 () pp. along the downstream channelsystem(l and ﬂoodplain). For this, we selected the abandoned Black Creek mine in the Horseﬂy watershed, British Columbia (52º18’45’’ N/ º5’34’’ W; Fig.
1), as a suitable case study area. The Black Creek mine is a small. massive sulfide deposits such as those found in Cyprus and Bett’s Cove, Newfoundland (e.g., Herzig and Hannington, ).
Because little is known about the internal nature of actively forming massive sulfide deposits (with the exception of the Middle Valley deposit; Mottl, Davis, Fisher, Slack, ), previous studies have been largely.
The Geology and Ore Deposits of the Sudbury Structure,Ministry of Natural Resources, Ontario, Ontario Geological Survey, Special Volume, Number 1: pages with illustrations including plate maps in back pocket.
[Pye, E. et al.] on *FREE* shipping on qualifying offers. The Geology and Ore Deposits of the Sudbury Structure,Ministry of Natural Resources, Ontario Author: E. et al. Pye. The Spencer method of slope stability analysis was used to assess the stability of the wall using the same rock mass parameters as in the UDEC analysis.
The results of the analysis with critical failure surfaces through the rock mass show that the wall is stable and estimates the factor of safety to be File Size: KB. Acid mine waters, often containing toxic concentrations of Fe, Al, Cu, Zn, Cd, Pb, Ni, Co, and Cr, can be produced from the mining of coal and metallic deposits.
Values of pH for acid mine waters can range from − to 5, but even circumneutral (pH ≈ 7) mine waters can Cited by: Start studying Stream and River Deposit. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
1. Environ Sci Technol. Nov 1;50(21) Epub Oct Post Gold King Mine Spill Investigation of Metal Stability in Water and Sediments of the Animas River by: studies it can be concluded that slope angle plays a major role on slope stability.
Safety factor varied from to for the depth of 10 m to m for the slope angle of 45 degrees. It showed that with the. AbstractLarge-scale surface mining in southern West Virginia significantly alters headwater stream networks.
The extent to which mining interacts with other stressors to determine physical, chemical, and biological conditions in aquatic systems downstream is unclear.
We conducted a watershed-scale assessment of Pigeon Creek, an intensively mined watershed of the Tug Fork drainage in Mingo Cited by: mines that typically become a source of acid mine drainage into rivers and streams in West Virginia.
The water that is impacted by acid mine drainage must be treated in order to stop any more problems from starting in the stream or river and to help reverse any effects that have already occurred in the area where the drainage is entering the water.
Acid Mine Drainage Prediction compares acid rock drainage factors of waste rock piles and tailings impoundments. In examining this table, it is important to note that diffusion of oxygen into water is slow and, therefore, oxidation of iron sulfide is inhibited until the water level drops, which can occur periodically or seasonally in some cases.
mine the distribution of heavy metals in stream and river sediments that drain the New Union Gold Mine tailings. The speciﬁc objectives were: to analyze the vertical and horizontal distribution of heavy metals in the sediments and to deter-mine the pH and electrical conductivity of the sed-iments.
Materials and Methods Sample collection. New research finds open-cut mines can affect groundwater and trees up to several kilometres away, which could have implications for the proposed Shenhua coal mine on the NSW Liverpool Plains.
The alluvial deposits consist of unconsolidated stream channel deposits, including gravels, sands, and silts. They typically range in thickness from 0 to 40 feet or more. The deposits tend to be discon- tinuous and of limited extent in the northern Black Hills. Surface erosion and sediment control at mines Universal Soil Loss Equation (USLE) (Wischmeier & Smith, ): A=RKLSCP (1) where A is the soil loss per unit area, R is a rainfall factor usually expressed as the product of rainfall energy times the maximum 30 File Size: KB.
Mining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef or placer deposits form a mineralized package that is of economic interest to the miner. Ores recovered by mining include metals, coal, oil shale, gemstones, limestone, chalk, dimension stone, rock salt, potash, gravel, and clay.
Impacts of Sand Mining on Environment – A Review Professor Podila Sankara Pitchaiah*1 Department of Geology, Nagarjuna University, Guntur, Andhra Pradesh, India Abstract Illegal and indiscriminate sand mining will became threat to the worldwide environments.
It leads to changes in river channel form, physical habitats and food Size: KB. sustain without significant ecological effects . This study investigated the heavy metals and physicochemical changes effects of acid mine drainage on selected surface and groundwater resources in the mining community in Ghana.
II. M AND METHODS A. Study area The mining community is located around 12 km from.stability status of the open pit mine.
3. To serve as a warning system as to which areas of the pit are unstable 4. To give measurements of rates of movement in the unstable zones 5.
To serve as a major slope stability risk management tool. Since slope failure can have serious economic consequences on an open pit mine, slope monitoring isFile Size: 2MB.Also spelled bahada. A series of adjacent alluvial fans coalescing in a basin at the foot of a mountain range.
bar An elevated region of sediment such as sand or gravel which has been deposited by the flow of a river or other moving body of water.
See also shoal. barrier ridge Any steep, unnavigable ridge or escarpment isolating one terrain from another. base level The lowest level to which a.