Results 11 to 20 of about 25,625 (255)

Platinum Group Element Traces of CAMP Volcanism Associated With Low‐Latitude Environmental and Biological Disruptions

open access: yesGeophysical Monograph Series, Page 263-304., 2021

Exploring the links between Large Igneous Provinces and dramatic environmental impact

An emerging consensus suggests that Large Igneous Provinces (LIPs) and Silicic LIPs (SLIPs) are a significant driver of dramatic global environmental and biological changes, including mass extinctions.
Jessica H. Whiteside   +3 more
wiley  

+7 more sources

Forecast of tectonic disturbances zones in coal layers

open access: yesGeofizicheskiy Zhurnal, 2023
This paper considers the problem of identifying geological disturbances that are ubiqu-itous in rocks. The purpose of the work is to test the methodology for identifying tectonic faults and their geometric parameters in coal seams. The article presents the results of the analysis of the accumulated information concerning the study of the microstructure
V.A. Baranov   +2 more
openaire   +4 more sources

Characterization of Coal Porosity for Naturally Tectonically Stressed Coals in Huaibei Coal Field, China [PDF]

open access: yesThe Scientific World Journal, 2014
The enrichment of coalbed methane (CBM) and the outburst of gas in a coal mine are closely related to the nanopore structure of coal. The evolutionary characteristics of 12 coal nanopore structures under different natural deformational mechanisms (brittle and ductile deformation) are studied using a scanning electron microscope (SEM) and low ...
Xiaoshi Li   +5 more
openaire   +3 more sources

Determination of loading mechanical characteristics of in-situ tectonic coal

open access: yesMeikuang Anquan, 2022
Based on the cold forming theory, taking density and permeability as indicators, a high-pressure cyclic loading and unloading method was used to prepare a standard coal briquette with a degree of compaction similar to that of underground in-situ ...
LI Wenshan, ZHANG Hao, JIN Zhixin
doaj   +1 more source

Experimental study on the deformation behaviour, energy evolution law and failure mechanism of tectonic coal subjected to cyclic loads

open access: yesInternational Journal of Mining Science and Technology, 2022
Compared to intact coal, tectonic coal exhibits unique characteristics. The deformation behaviours under cyclic loading with different confining pressures and loading rates are monitored by MTS815 test system, and the mechanical and energy properties are
Deyi Gao   +6 more
doaj   +1 more source

Experimental Investigation on Mechanics and Seepage Characteristics of Tectonic and Intact Coal Containing Gas

open access: yesApplied Sciences, 2020
Coalbed methane is a double-edged sword with two attributes of energy and hazard in coal mines. Gas drainage is the most direct and effective measure for gas recovery and disaster prevention in coal mines, which is seriously affected by the mechanics and
Chaolin Zhang   +3 more
doaj   +1 more source

Experimental study on confined compression deformation and breakage characteristics for different types of coal particles

open access: yesMeitan kexue jishu, 2023
Dynamic disasters such as coal and gas outburst seriously restrict the safety of mine production. Different types of coal particles reflect the coal structure, mechanical characteristics and energy storage behavior under load, which is of great ...
Wei LI   +5 more
doaj   +1 more source

Geodetic and seismological observations applied for investigation of subsidence formation in the CSM Mine (Czech Republic) [PDF]

open access: yes, 2018
Purpose. Undermined areas are affected by the creation of subsidence depressions due to long-term underground mining. In general, different geodetic methods are applied to obtain further information needed to determine the spatial development of the ...
Kajzar, V
core   +1 more source

Experimental Investigation of the Adsorption Characteristics of Mixed Coal and Variations of Specific Surface Areas before and after CH4 Adsorption

open access: yesApplied Sciences, 2019
Tectonic coal is a kind of soft coal that is generated during tectonic movement. Gas outbursts usually occur in seams containing both virgin coal and tectonic coal.
Pengxiang Zhao   +7 more
doaj   +1 more source

Provenance and geochemistry of exotic clasts in conglomerates of the Oligocene Torehina Formation, Coromandel Peninsula, New Zealand [PDF]

open access: yes, 2003
Non-marine pebble to cobble conglomerates of the lower Torehina Formation (Oligocene) crop out along western Coromandel Peninsula and overlie, with strong angular discordance, continental-margin metasedimentary rocks (Manaia Hill Group) of Mesozoic (Late
Baker C. K.   +19 more
core   +2 more sources

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