Investigation into Relationships Between Cerchar Hardness Index and Some Mechanical Properties of Coal Measure Rocks

2017 ◽  
Vol 35 (4) ◽  
pp. 1605-1614 ◽  
Author(s):  
O. Yaralı
Keyword(s):  
Mechanical Properties ◽  
Coal Measure ◽  
Hardness Index ◽  
Coal Measure Rocks

The Spherulitic Ironstones of West Yorkshire

1934 ◽  
Vol 71 (2) ◽  
pp. 49-65 ◽  
Author(s):  
T. Deans
Keyword(s):  
Coal Measure ◽  
South West ◽  
Coal Measure Rocks ◽  
Similar Development

The Millstone Grit and Coal Measure rocks of West Yorkshire include a series of sedimentary ironstones characterized by the spherulitic habit of the siderite. These rocks have been examined in detail in Airedale and Calderdale, and in brief visits to East Lancashire and South-West Yorkshire the author has recognized a similar development of ironstones, and so believes that the substance of this paper may be generally applicable to the whole of the central and southern Pennine region.

scholarly journals Strength constraints of shallow crustal strata from analyses of mining induced seismicity

2013 ◽  
Vol 5 (1) ◽  
pp. 737-765 ◽  
Author(s):  
M. Alber ◽  
R. Fritschen ◽  
M. Bischoff
Keyword(s):  
Rock Mass ◽  
Strength Properties ◽  
Coal Measure ◽  
Seismic Events ◽  
Mining Induced Seismicity ◽  
Strength Tests ◽  
Seismic Records ◽  
Coal Measure Rocks ◽  
Rock Mass Failure ◽  
Strength Constraints

Abstract. Stress redistributions around large underground excavations such as coal mines may lead to failure of the surrounding rock mass. Some of these failure processes were recorded as seismic events. In this paper the different failure processes such as rock mass failure or the reactivation of faults are delineated from the seismic records. These are substantiated by rock mechanical analyses including laboratory strength tests on coal measure rocks obtained from underground drilling. Additionally, shear tests on discontinuities in coal measure rocks (slickensides in shale and rough sandstone joints) were conducted to grasp the possible variation of strength properties of faults. Numerical modeling was employed to evaluate the state of stress at the locations where seismic events did occur.

Ankerites and chalybites from the northern Pennine orefield and the north-east coalfield

1947 ◽  
Vol 28 (197) ◽  
pp. 53-74 ◽  
Author(s):  
J. A. Smythe ◽  
K. C. Dunham
Keyword(s):  
Coal Measure ◽  
Chemical Analyses ◽  
Lower Carboniferous ◽  
North East ◽  
The North ◽  
Coal Measure Rocks

Ankerites from the Northumberland coalfield were first described, with chemical analyses, some ten years ago (Hawkes and Smythe, 1935), when it was found that examples from veins exposed on the coast near Hartley and from sludge from nearby coal-washeries showed a remarkable uniformity in composition. The operations of the collieries concerned cover an area roughly 6 × 6 miles, and range from the Beaumont to the High Main Seam. In order to ascertain whether this uniformity is maintained over a wider area, five additional samples of ankerite from veinlets in rocks of Coal Measure age, and one from partings in the Lower Carboniferous Scremerston coal have been examined. The Coal Measure rocks cut by the veinlets have been proved to contain substantial proportions of ferriferous carbonates, while for comparative purposes two examples of rocks of similar age with carbonate but unaccompanied by ankerite veinlets have been investigated. The range in composition of ankerites in the coalfield has proved to be small.

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