Results 31 to 40 of about 77,777 (186)

Energy Release Analysis of a Severe Rockburst in a Headrace Tunnel Crossing a Tectonic Stress Zone

open access: yesShock and Vibration, 2019
When tunneling in a hard and brittle rock mass within a tectonic stress zone, dynamic failure of rock mass-rockburst may occur. Considering the occurrence of rockburst is generally induced by a sudden release of storage elastic energy, a numerical ...
H. M. Tian   +4 more
doaj   +1 more source

The Ability of Significant Tidal Stress to Initiate Plate Tectonics [PDF]

open access: yes, 2019
Plate tectonics is a geophysical process currently unique to Earth, has an important role in regulating the Earth's climate, and may be better understood by identifying rocky planets outside our solar system with tectonic activity.
Triaud, Amaury H. M. J., Zanazzi, J. J.
core   +2 more sources

Pre-Spud Mud Loss Flow Rate in Steeply Folded Structures

open access: yesOil & Gas Science and Technology, 2014
In this paper, a new method that predicts the pre-spud mud loss flow rate in formations with tectonic fractures of steeply folded structures is proposed.
Wang Zhiyuan, Sun Baojiang, Ke Ke
doaj   +1 more source

Occurrence Mechanism and Prevention Technology of Rock Burst in Middle Layer Mining of Steeply Inclined Thick Coal Seam

open access: yesMeikuang Anquan, 2020
In view of the frequent occurrence of rock burst in the middle layer of the steeply inclined thick coal seam in Dongxia Coal Mine, based on the three-dimensional microseismic monitoring network and the seismic source space precise positioning method, the
DING Xiaomin, NIU Jiasheng, XUE Zaijun, GONG Siyuan, SHEN Wei, LIU Jianxiao, YU Lei
doaj   +1 more source

Seismic cycles, size of the largest events, and the avalanche size distribution in a model of seismicity [PDF]

open access: yes, 2012
We address several questions on the behavior of a numerical model recently introduced to study seismic phenomena, that includes relaxation in the plates as a key ingredient.
A. Rosso   +4 more
core   +2 more sources

TECTONOPHYSICAL CRITERIA FOR FORECASTING THE LOCATIONS OF QUARTZ CRYSTAL DEPOSITS (CASE OF SUBPOLAR URAL)

open access: yesГеодинамика и тектонофизика, 2020
Spatial reconstruction of tectonic stresses within the Subpolar Ural quartz crystal-containing province was conducted by the kinematic method [Gushchenko, 1973, 1979] based on the main indicators of tectonic stresses on slickensides. Local stress states (
L. A. Sim
doaj   +1 more source

Seismicity, focal mechanisms, and stress distribution in the Tres Vírgenes volcanic and geothermal region, Baja California Sur, Mexico [PDF]

open access: yesGeofísica Internacional, 2006
In October 1993 we carried out a seismic monitoring in the Tres Vírgenes volcanic region in order to record the background seismicity associated with the volcanic structures, the geothermal field and the tectonic features of the area. Hypocenters for 257
Luis Munguía, Victor Wong
doaj  

Analysis of the Coal and Gas Outburst Mechanism from the Perspective of Tectonic Movement

open access: yesGeofluids, 2021
Coal and gas outburst is the extreme instability caused by stress, gas, and coal. In this review article, dominant factors and inducing factors of outburst were summarized; geologic features of typical outburst cases and the effects of tectonic movement ...
Qingyi Tu   +4 more
doaj   +1 more source

鄂尔多斯地块西缘莫霍面起伏及泊松比分布

open access: yesDizhen xuebao, 2018
收集了鄂尔多斯地块西缘的21个宁夏区域地震台网台站和183个中国地震科学探测台阵台站记录到的2015年1月至2016年1月期间的远震P波资料,通过对其进行反褶积提取接收函数,并利用H-Kappa叠加方法计算了研究区内的莫霍面深度和泊松比。结果表明:研究区的莫霍面深度在36—58 km范围内变化,大体呈南厚北薄、西厚东薄的特点,且具有明显的分区特征,即以香山—天景山断裂为界,莫霍面在南北向呈现明显的起伏变化,该断裂以南的地壳增厚方式可能与青藏高原的水平挤压力所导致的上地壳重叠有关 ...
Yingcai Xu   +5 more
doaj   +1 more source

Current stress field and its relationship to tectonism in a coal mining district, central China, for underground coal energy exploration

open access: yesEnergy Reports, 2022
Adopting 47 sets of in situ stress measurements taken at depths ranging from 417 to 1123 m in a coal mining district in central China by the overcoring method, we characterize the magnitude and orientation of the current stress field and its relationship
Peng Li   +4 more
doaj   +1 more source

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