Results 71 to 80 of about 77,993 (207)

Effect of Deviatoric Stress on Deformation Energy of Tectonic Coal: A Modified Energy Model Considering Nonlinearity

open access: yesEnergy Science & Engineering
The deformation energy stored in soil‐like tectonic coal plays a critical role in coal and gas outbursts. Unlike hard rocks, tectonic coal exhibits pronounced stress–strain nonlinearity, invalidating traditional elastic energy models.
Chenghao Wang   +4 more
doaj   +1 more source

Electro-Magnetic Earthquake Bursts and Critical Rupture of Peroxy Bond Networks in Rocks

open access: yes, 2006
We propose a mechanism for the low frequency electromagnetic emissions and other electromagnetic phenomena which have been associated with earthquakes. The mechanism combines the critical earthquake concept and the concept of crust acting as a charging ...
Allègre   +158 more
core   +1 more source

Valuation method for sub-indicators of rock burst risk based on mining depth and tectonic stress

open access: yesMeitan kexue jishu
The mechanical properties of deep rocks differ from those of the shallow layers due to the complex environment. Rock burst disasters are often induced under the disturbance of coal mining.
Zhen LI   +7 more
doaj   +1 more source

Fracture characteristics under the coupling effect of tectonic stress and fluid pressure: A case study of the fractured shale oil reservoir in Liutun subsag, Dongpu Sag, Bohai Bay Basin, Eastern China

open access: yesPetroleum Exploration and Development, 2015
Based on the integrated study on core description, fluid inclusions and basin modeling, and considering the coupling effect of tectonic stress and fluid pressure, the characteristics of fractures were analyzed in the inter-salt fractured shale oil ...
Yang LUO   +3 more
doaj   +1 more source

Mesozoic–Cenozoic stress field magnitude in Sichuan Basin, China and its adjacent areas and the implication on shale gas reservoir: Determination by acoustic emission in rocks

open access: yesChina Geology, 2020
: The Sichuan Basin is one of the vital basins in China, boasting abundant hydrocarbon reservoirs. To clarify the intensity of the tectonic stress field of different tectonic episodes since the Mesozoic and to identify the regional dynamic background of ...
Lin-yan Zhang   +8 more
doaj   +1 more source

Research status of tectonic stress and the relationship between tectonic stress and oil-gas accumulation

open access: yesIOSR Journal of Engineering, 2014
In oil-bearing basins, the relationship between tectonic stress and generation, migration, accumulation of oil and gas has been a research focus in the oil and gas dynamics. This paper takeed the research status of tectonic stress as the foothold, and the research methods of tectonic stress as foundation, summarized the effects of tectonic stress on ...
openaire   +1 more source

Interpreting intraplate tectonics for seismic hazard : a UK historical perspective [PDF]

open access: yes, 2012
It is notoriously difficult to construct seismic source models for probabilistic seismic hazard assessment in intraplate areas on the basis of geological information, and many practitioners have given up the task in favour of purely seismicity-based ...
Arup   +16 more
core   +2 more sources

Fracture characteristics and its genesis of tight reservoir in Xujiahe formation of central Yuanba area in Sichuan basin

open access: yesYouqicang pingjia yu kaifa, 2018
The tight gas reservoir in the central Yuanba area of Sichuan basin is one of the major breakthrough in oil and gas survey in recent years. The fractures have important influence on the migration, enrichment and production capacity of the natural gas ...
Li Hu   +4 more
doaj  

Present-day stress state of the Shanxi tectonic belt

open access: yesGeodynamics & Tectonophysics, 2012
The Shanxi tectonic belt is a historically earthquakeabundant area. For the majority of strong earthquakes in this area, the distribution of earthquake foci was controlled by the N–S oriented local structures on the tectonic belt. Studies of the present stress state of the Shanxi tectonic belt can contribute to the understanding of the relationship ...
Wang Kaiying, Ma Jin, Diao Guiling
openaire   +3 more sources

An improved gravity method to horizontal tectonic stresses and its applications in Tibet

open access: yesGeodesy and Geodynamics, 2020
It is significant for identifying mass movement patterns to invert horizontal tectonic stresses at different depths underneath Tibet. In recent years, a large number of achievements focusing on two-dimensional tectonic stresses have been obtained from ...
Chuang Xu   +4 more
doaj   +1 more source

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