2 edition of Surface crown pillar evaluation for active and abandoned metal mines found in the catalog.
Surface crown pillar evaluation for active and abandoned metal mines
|Statement||M.C. Betournay, editor. --|
|Contributions||Betournay, M.C., Canada Centre for Mineral and Energy Technology., Ontario. Ministry of Northern Development and Mines.|
|LC Classifications||TN319 .S87 1989|
|The Physical Object|
|Pagination||v, 216 p. :|
|Number of Pages||216|
to predict roof vibrations in inaccessible areas of abandoned underground coal mines by monitoring an active deep mine roof while surface blasting occurred overhead. Our endeavor was expanded in as it was determined additional data was needed to more accurately determine surface blasting vibration effects under a variety of geologic. 2. Surface Mining Machinery Glossary Bibliography Biographical Sketches Summary This chapter deals with surface mining. Section 1 presents an overview of surface mining methods and practices as commonly employe d in modern surface mining operations. The description includes a comparison of the advantages and disadvantages of surface and.
and-pillar mining isthe seam thickness. The influence ofthis parameter on the amount ofcoal lost inthe support pillars is shown in Fig. 2, which illustrates clearly how in a conventional bord-and-pillar system thecoallossesincrease with seamheight. From Figs. Iand2itfollowsthat theareaofapplica-tion ofconventional bord-and-pillar mining File Size: KB. Mining is one of Newfoundland and Labrador’s largest and oldest industries, and a major contributor to the economy of our province, especially in rural areas. More than fifteen mineral commodities have been produced or mined in the province. Five metal mines currently .
Conceptual Study of Block Caving Induced Step-path 54 Driven Failure in Large Open Pit Slope ΔXY displ. at surface outcrop, m 15 0 Norm. shear stress XY, MPa RB 10 RB 5 differential XY displ. at surface outcrop 0 20 22 24 26 28 30 32 34 36 -5 simulation time, 0 0 Crown pillar thickness, mVertical stress YY, MPa. Common forms of subsidence in room and pillar coal mining [Whittaker and Reddish, ]. Figure Surface troughs over room and pillar mining, m contour interval [O'Connor et al., ].
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Surface crown pillar evaluation for active and abandoned metal mines: proceedings of the international conference: Senator Hotel, Timmins, Ontario, Canada, Nov.Author: M C Bétournay ; Canada Centre for Mineral and Energy Technology.
Evaluation of the long-term surface stability of crown pillars overlying underground mines is an important component of mine closure planning. The definition of a crown pillar, as well as a brief discussion of the assessment of the probability and consequence of crown pillar failure are given in this paper.
Techniques for stability assessment using mechanistic, empirical and numerical Cited by: Hoek, E. A limit equilibrium analysis of surface crown pillar stability. In: Proceedings of the international conference Surface Crown Pillar Evaluation for Active and Abandoned Metal Mines.
Ontario; p. Cited by: For example, the scaled span method, one of the empirical analysis methods suggested by Carter , has been used to determine the stability of surface crown pillars in both active and abandoned.
Stability Evaluation and Grouting of Abandoned Coal Mines Used for Building Constructions Chemical and microbiological characteristics of mineral spoils and drainage waters at abandoned coal and metal mines. Water Air Soil Pollut.
Szwedzicki, T.: Pre-and post-failure ground behavior: Case studies of surface crown pillar collapse. Int. J Author: Wanghua Sui, Jiawei Liu, Guangtao Cai. This SME classic is both a reference book for the working engineer and a textbook for the mining student.
This hardcover edition gives a brief history of surface mining and a general overview of the state of surface mining today--topics range from production and productivity to technological developments and trends in equipment.
This extremely useful text takes the approach that exploration 5/5(4). used in Australian metalliferous mines. The crown pillar as it stands in the vertical plane between two open stopes is an integral part of the global stability of an underground metal mine. The stability of crown pillars are significantly affected by the mechanical and.
Mine Hazards under Transportation Corridors - The Timmins Experience. Interstate Technical Group on Abandoned Underground Mines, June 14 - 16, Rochester, New York. OTHERS 1. Sainsbury, D., Itasca Consulting Group Inc. Crown Pillar Subsidence and Hydrologic Stability Assessment for the Proposed Eagle Mine.
Technical Report. The U.S. Government's Official Website for the Office of Surface Mining Reclamation and Enforcement (OSMRE). OSMRE's business practices are to reclaim abandoned mine lands (Title IV), regulate active coal mines (Title V), and apply sound science through technology transfer.
Mines & Advanced Projects of Iron Ore, Metallic Minerals, Industrial Minerals, and Selected Construction Aggregates- January Index for Taconite Mines and Plants 1.
IDLE - United States Steel (USS) Keewatin Taconite 2. Hibbing Taconite Mine and Plant 3. USS Minntac Mine and Plant 4. Arcelor Mittal Minorca Mine and Plant Size: KB.
Shallow stopes of metal mines, abandoned as well as active, can be subject to several gravity-driven failure mechanisms  (Figure 1), originating within a variety of geological terrains and controlled by a range of rock mass quality and disposition of discontinuities. The rock mass elements controlling stability are listed in Table 1.
Table 1. The design, while taking into consideration possible surface crown pillar settings and inherent characteristics, is founded on a step-by-step procedure starting with site investigations through to monitoring or pillar recovery.
The process is flexible, in that it incorporates decision making and changes in mining strategy. ABSTRACT: Evaluation of the long-term surface stability of crown pillars overlying underground mines is an important component of mine closure planning.
The definition of a crown pillar, as well as a brief discussion of the assessment of the probability and consequence of crown pillar Cited by: 2. Evaluation the strength and sealing capability of boundary pillars in coal mines Adam Frolik Central Mining Institute, pl.
Gwarków 1, Katowice, Poland (e-mail: [email protected]) Abstract: The objective of the evaluation of boundary pillars is to analyze the strength and leak tightness of the abandoned rock body performing a. were developed for metal or non-metal mines. This paper presents a pillar design methodology that was developed from a study of pillar performance in operating stone mines.
Data were collected that describe the rock mass quality, pillar conditions, mining File Size: KB. Stability evaluation and remediation of a critical northern Canada highway over an abandoned gold mine. Proceedings 5 th Interstate Technical Group on Abandoned Underground Mines Biennial. Introduction.
There are more than operating underground stone mines in the United States that use the room-and-pillar method of mining. Mining is typically conducted in flat laying or gently undulating deposits ranging from highly siliceous limestone to chemical-grade dolomite and by: Surface crown pillar evaluation for active and abandoned metal mines Not In Library.
Stress-induced failures in mine roof James R. Aggson Not In Library. Not In Library. Engineering geology and rock mechanics Neil Duncan Not In Library.
Engineering geology, Accessible book, Mining engineering, Protected DAISY, Testing. Case 2 – De-stressing sill pillars in / at Copper Cliff Mine Crown Pillar • Bottom-up mining method has been in practice in different ore bodies at Copper Cliff Mine.
• As the mining approaches the sill pillar position, the mining-induced stresses concentrate in the sill pillar zones and often result in bursting problems.
Failures reaching surface can begin as deep as m [Allen, ]. This imposes a failure mechanism/path focus rather than conventional approaches which rely only on the surface crown pillar, e.g. thickness to width ratio, which can falsely lead to an assumption that a thicker rock mass is safer [Bétournay et al., ].
Surface crown pillar evaluation for active and abandoned metal mines.Where longwall mining is active and subsidence is a well-documented and predictable action, surface response to ongoing mining can be accurately estimated. However, in the case of room and pillar mines, especially where they are inaccessible and record-keeping may be inaccurate, predictions of when subsidence will happen are not possible.Mine rescue teams compete in contests across the country to prepare themselves to operate effectively in a mine emergency.
Provide or view comments on MSHA regulations to repeal, replace or modify. Read submitted comments or provide new comments under EOenforcing the regulatory reform agenda. Safety Initiatives.