Determining cleat orientation of deeper coalbeds from overlying coals

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U.S. Dept. of the Interior, Bureau of Mines, c , [Washington]
Coal mines and mining, Degassing of
Other titlesCleat orientation of deeper coalbeds
Statementby C. M. McCulloch, S. W. Lambert, and J. R. White ; Pittsburgh Mining and Safety Research Center
SeriesReport of investigations - Bureau of Mines ; 8116, Report of investigations (United States. Bureau of Mines) -- 8116
ContributionsLambert, S. W., jt. auth, White, James R., jt. auth, United States. Bureau of Mines
The Physical Object
Pagination[2], ii, 19 p. :
ID Numbers
Open LibraryOL14914608M

Studies of cleat orientation were carried out in underground mines that are operating in separate coalbeds vertically above one another. The data show that over a vertical separation of to feet, the average differ- ence in coal cleat orientation between mines is 04" for the face and 08" for the butt cleat.

Mining Publication: Determining Cleat Orientation of Deeper Coalbeds From Overlying Coals. Examination of several coalbeds in Walker County, Alabama, Cambria, Greene, and Fayette Counties, Pennsylvania, and Caleigh and Wyoming Counties, West Virginia, indicates that cleat orientations are similar throughout a vertical sequence of strata.

Get this from a library. Determining cleat orientation of deeper coalbeds from overlying coals. [C M McCulloch; S W Lambert; James R White; United States. Bureau of Mines.]. By C. (Charles M.) McCulloch, joint author. James R. White, joint author. Lambert and United States. Bureau of Mines.

Cleat orientations measured at outcrops agree well with the directions measured underground, suggesting that the amount of vertical separation between coalbeds has little effect on the resulting differences in cleat directions. The largest variation of cleat directions between adjacent coalbeds occurs where a large horizontal distance separates two sample locations.

Cleat orientations for deeper coalbeds. The cleat orientation is further validated from the previous fracture analysis using FMI well log in Parbatpur area located southern part of the Jharia coalfield. The major coal seams under the. McCulloch has written: 'Determining cleat orientation of deeper coalbeds from overlying coals' -- subject(s): Degassing of coal, Coal mines and mining 'Applying computer-drawn maps of.

The cleat orientation is further validated from the previous fracture analysis using FMI well log in Parbatpur area located southern part of the Jharia coalfield.

The major coal seams under the study area exhibit directional permeability, with the maximum permeability, oriented parallel to the direction of face cleat by: 1. Introduction. Fractures occur in nearly all coal beds, and can exert fundamental control on coal stability, minability, and fluid flow.

It is therefore not surprising that coal fractures have been investigated since the early days of coal mining, and that published descriptions and speculation on fracture origins date from early in the nineteenth century (Mammatt, ; Milne, ; cited Cited by: Geologos.

Lambert, S.W. & White, J.R., Determining cleat orientations of deeper coalbeds from overlying coals.

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U.S. Bureau of Mines Report of Investigations Report24 pp. R., Determination of in-situ stress direction from cleat orientation mapping for coal bed methane exploration in south-eastern part of Jharia Cited by: 5.

The coal cleat system: A new approach to its Determining cleat orientation of deeper coalbeds from overlying coals book. Origin and spacing of cleats in coal beds. Journal of Pressure Vessel derived data were used to determine regional cleat orientation and.

the existing map showing the orientation of face cleat. Purpose and Scope This report presents the results of the study at a test site in Preston County, West Virginia, to determine if a correlation exists between the^ direction of maximum transmissivity in a coal aquifer and the orientation of the face cleat in the coal Cited by: 6.

Determining Cleat Orientation of Deeper Coalbeds From Overlying Coals 1/1/ - Reports of Investigations Examination of several coalbeds in Walker County, Alabama, Cambria, Greene, and Fayette Counties, Pennsylvania, and Caleigh and Wyoming Counties, West Virginia, indicates that cleat orientations are similar throughout a vertical sequence of strata.

Dimensions and mutual relationships amongst fracture (cleat) parameters such as maximum aperture width, average aperture width, length, spacing etc. control the connectivity within a fracture network and the fluid flow in a coal seam as the matrix permeability, here, is negligible.

In this paper, we document cleat size distributions and investigate length–aperture relationships from coals Author: Krishanu Bandyopadhyay, Jyotirmoy Mallik, Trishit Ghosh. to determine from cuttings the intra-cleat angle and the angles between the cleats and bedding.

The analysis is based on the phenomenon that cleats and bedding planes form the weakest bounds in a coal bed.

Up to two thousand fragments, of three French coal samples, are analysed to characterize a cl eat angle distribution for each by: Cleat orientations measured at outcrops agree well with the directions measured underground, suggesting that the amount of vertical separation between coalbeds has little effect on the resulting differences in cleat directions.

The largest variation of cleat directions between adjacent coalbeds occurs where a large horizontal distance separates two sample locations. Cleat orientations for deeper coalbeds Cited by: ri / determining cleat orientation of deeper coalbeds from overlaying coals, pb, $ 25 ri / methane gas content of the mary lee group of coalbeds, jefferson, tuscaloosa, and walker counties, alabama, pb, $ 11 ri / sulfur reduction potential of the coals of the u.s., pb, $ Peat 60 >60 0,20 0,20 Brown coal 71 52 0,40 0,42 Sub-bituminous 80 40 0,60 0,63 coal High volatile 86 31 0,97 1,03 bituminous coal Medium volatile 90 22 1,47 1,58 bituminous coal Low volatile 91 14 1,85 1,97 bituminous coal Semi anthracite 92 8 2,65 2,83 Anthracite 95 2 6,55 7,00 GAS GENERATION.

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2 have become the principal criteria by which coals are selected to make blast furnace coke. Typical western Canadian medium volatile, Inertinite-rich coking coals produce cokes that are among the world's best in this test.

Vitrinite reflectances of to %, inertinite contents of >30%, alkalinity indices of File Size: KB. "The natural vertical fracture system in bituminous coalbeds is called cleat.

Cleat orientation commonly controls the direction of mining with major development paralleling the face cleat. Previous researchers have categorized the origin of cleat as endogenetic, relating the origin of cleat to compaction and coalification, and exogenetic, relating the origin of cleat to tectonic forces.

Coal beds are the primary aquifers in the Fruitland Formation. At the northern outcrop and in cores from the northern part of the basin, coal beds are well cleated, and they are orders of magnitude more permeable than adjacent, low-permeability sandstones (Ayers and Ambrose, ; Mavor and McBane, ).

From recharge areas, primarily at the. Characteristics and origins of coal cleat: A review Characteristics and origins of coal cleat: A review Laubach, S.E; Marrett, R.A; Olson, J.E; Scott, A.R Cleats are natural opening-mode fractures in coal beds.

They account for most of the permeability and much of the porosity of coalbed gas reservoirs and can have a significant effect on the success of engineering. Start studying Ch. Learn vocabulary, terms, and more with flashcards, games, and other study tools.

This book is a reprint of a long out of print title dating from the later half of the 's. It's central question was how much longer would coal be economically recoverable in England.

At the time, coal was as central to their economy as oil is to ours today, so modern readers who want to understand the concept of "peak-oil" may benefit from 4/5(1). United States. Bureau of Mines: Coal Mine Health Seminar: a joint staff conference of the Bureau of Mines and the National Institute for Occupational Safety and Health / (Washington: U.S.

Dept. of the Interior, Bureau of Mines, ), also by Coal Mine Health Seminar, Marilyn K. Hutchinson, and National Institute for Occupational Safety and.

Cleat orientation, cleat frequency and cleat angle distribution of deep coal seams are only available by the use of drilling cores and from coal mine samples. Coal drilling cuttings are a cheap and fast alternative to measure cleat angle distributions with the use of image analysis techniques.

In this study oriented coal samples and drilling cuttings of the RECOPOL field experiment are. The orientation of a planar or linear feature in three-dimensional space.

of formation. Natural gas associated with coal, called coal gas or coalbed methane, can be produced economically from coal beds in some areas. In some basins coals form source rocks.

coal must have an extensive cleat system to ensure adequate permeability and flow. The direct method of determining methane content of coalbeds for ventilation design by: Kissell, Fred N.

Published: () Assessment of the coal-bed gas total petroleum system in the Cook Inlet-Susitna region, south-cental Alaska by: Rouse, William A. Published: ().

@article{osti_, title = {Stress-dependent permeability and porosity of coal and other geologic formations}, author = {McKee, C R and Bumb, A C and Koenig, R A}, abstractNote = {Fundamental relationships have been derived for permeability, porosity, and density as a function of effective stress.

The primary formation parameter is pore compressibility, and formulas are derived for both. Cleats in coal form during coalification.

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In some cases, the orientation of cleats is similar to the modern stress field; in others, it is a paleo-stress field indicator, and more aligned with tectonic structures that formed closer to the time of coalification.

The presence of water in the coalbeds keeps the methane adsorbed on the surfaces of the coal and within the cleats and adsorbed to walls in the micropore structure of the coal matrix (see Figure ).

Water in the coalbeds may derive from (1) original water (“connate” water) associated with freshwater or marine settings in which the organic.Archived: Interstate Technical Group on Abandoned Underground Mines (includes the Pittsburgh Coalbed and the overlying drawslate and rider coal).

The Lake Lynn Laboratory (LLL) is a highly sophisticated underground and surface laboratory located about 60 miles southeast of Pittsburgh, PA, and 10 miles northeast of Morgantown, WV, where.Throughout the basin, coal beds comprising the coal zone "average 25 ft in thickness, and are separated by clastic sedimentary rocks ranging from a few feet to ft in thickness" (Ellis,p.

44). The coal beds of the Wyodak-Anderson coal zone outcrop or subcrop .