Results 261 to 270 of about 123,413 (318)

Research on the Mechanism of Sand Bridge Stuck Drill in Deep Coal and Rock Gas Horizontal Wells

Energy Science &Engineering, EarlyView.
Accounting for wellbore collapse debris and the bulldozer effect, this study develops models for permeable and impermeable sand bridge sticking in deep CBM horizontal wells, deriving resistance and volume formulations. Validated in Changqing, results show impermeable bridges dominate; controls (fluid optimization, staged drilling, circulation, speed ...
Cheng Hui, Yong Ouyang, Zhifeng Duan, Xiaoyue Xu, Yuxiang Teng, Mingyang Liu, Hui Zhang, Long Chen   +7 more
wiley   +1 more source

Tidal and hydrological seismicity modulations reveal pore fluid diffusion during earthquake nucleation. [PDF]

Sci Adv
Zhao Z, Xue L, Bürgmann R, Heimisson ER, Lu W, Yue H.   +5 more
europepmc   +1 more source

Estimation of the GCV of Coal Using Real‐Time Plant Data

Energy Science &Engineering, EarlyView.
ABSTRACT Online or real‐time strategies of estimating the gross calorific value (GCV) of coal are still not fully explored in academic literature, even though both conventional and sophisticated offline methods for estimating the GCV are well described.
Lethukuthula Nokwazi Vilakazi, Daniel Madyira   +1 more
wiley   +1 more source

Middle Pleistocene tectonic events around the SE Aegean Sea: Insights from magnetostratigraphy, (U-Th)/He zircon dating, and fault kinematics in the Datça Graben (SW Türkiye). [PDF]

Sci Rep
İnce MD, Kaymakci N, Langereis C, Uzel B, Gülyüz E, Koralay EO, Stoica M, Sümer Ö.   +7 more
europepmc   +1 more source

Miocene geology of Seki district, Miyagi Prefecture, northeast Japan:Block faulting in Miocene

, 1983
Kazuo Amano
openalex   +2 more sources

Analysis of the Algorithm Monitoring the Geometric Parameters of the Powered Support Based on Station Tests

Energy Science &Engineering, EarlyView.
ABSTRACT The powered roof supports in the longwall complex are placed and interconnected next to one another, typically about 125–250 units in a longwall face. It is an essential component in the longwall complex, which also includes a shearer (or plow) and an armored face conveyor.
Dawid Szurgacz, Trzop Konrad, Jiri Pokorny, Dariusz Janik   +3 more
wiley   +1 more source

Research on the mechanism of fault sliding casing damage under the effect of water immersion deterioration of rock mass. [PDF]

Sci Rep
Zhang Y, Shao Y, Mi D, Wang B, Li Y.
europepmc   +1 more source

Geophysical-geological studies of possible extensions of the New Madrid Fault Zone. Annual report, 1982. Vol. 1

, 1983
William J. Hinze, L. W. Braile, George V. Keller, Edward G. Lidiak   +3 more
openalex   +2 more sources

Failure Mechanism of Asymmetric Large Deformations Under Repeated Mining in Roadways

Energy Science &Engineering, EarlyView.
Principal stress‐evolution diagram at different advance positions of 42205 working face. ABSTRACT To address the challenge of controlling severe asymmetrical deformation in roadways subjected to repeated mining, this study (i.e., based on the engineering context of the Buertai Coal Mine) investigated the characteristics of the regional stress field in ...
Ai‐Rong Wang, Tao Peng, Kang Zhou, Chong‐Yu Song   +3 more
wiley   +1 more source

Detailed three-dimensional fault model of the 2022 M_w 6.6 Luding earthquake reveals seismic hazard potential in the southeastern Tibetan plateau. [PDF]

Sci Rep
Xu F, Lu R, Zhang J, Klinger Y, Liu Y, Yang X, Liu G, Wang W, Guo Z.   +8 more
europepmc   +1 more source