Results 61 to 70 of about 4,225,085 (180)

Coal measure gas co-generation and reservoir model and its geologic control effect in Upper Permian coal measure in South Sichuan area

Meitan kexue jishu
To investigate the unknown coexistence relationships and controlling factors for coal measure gas in the Upper Permian of the South Sichuan area, a systematic study was conducted on the characteristics of the reservoir lithological assemblage, the mode ...
Zhengxin HUANG, Xiaoli ZHANG, Zhaobiao YANG, Jinxian HE, Caiqin BI, Xuejuan SONG, Meng WU, Can LIANG   +7 more
doaj   +1 more source

Design and Evaluation of a Surfactant–Mixed Metal Hydroxide-Based Drilling Fluid for Maintaining Wellbore Stability in Coal Measure Strata

Energies, 2019
Co-exploitation of coal measure gases (coalbed gas, shale gas, and tight sandstone gas) puts a higher requirement on drilling fluids. Conventional drilling fluids have disadvantages, such as causing problems of borehole collapse, formation damage, and ...
Shuya Chen, Yanping Shi, Xianyu Yang, Kunzhi Xie, Jihua Cai   +4 more
doaj   +1 more source

Coal and Gas Outburst Behavior in Gas‐Bearing Tunnels Revealed Through an Interpretable ISSA‐DNN Learning Framework

Geofluids, Volume 2026, Issue 1, 2026.
Coal and gas outbursts represent one of the most severe safety hazards during the construction of gas‐bearing tunnels. Accurate risk prediction remains difficult because of complex geological conditions, limited sample sizes, and the inherent subjectivity in hazard classification.
Fangyin Wu, Wenbo Yang, Zhiyu Chen, Jian Yan, Wenyu Xu, Lina Wen, Zetian Zhang   +6 more
wiley   +1 more source

Indication of natural gas migration and accumulation by three-dimensional fluorescence characteristics of gas-field waters: A case study of the Permian-Triassic in the central-western Sichuan Basin

Petroleum Exploration and Development, 2012
Permian-Triassic natural gas migration paths and accumulation patterns in the central-west Sichuan region have been studied by way of examining the three-dimensional shape, light intensity excitation and fingerprint characteristics of aromatic ...
Wei LI
doaj   +1 more source

Multi‐Sources and Modes‐Based Overtopping Risk Model for Gravity Dams Under Extreme Working Conditions

Water Resources Research, Volume 61, Issue 11, November 2025.
Abstract Addressing the limitations of traditional overtopping risk analysis methods, which either consider only a single failure mode or fail to accurately characterize the nonlinear characteristics of reservoir levels, this paper proposes a novel overtopping risk model for dams.
Liang Pei, Qiliang Sun, Xiang Lu, Yanling Li, Jiankang Chen, Kun He   +5 more
wiley   +1 more source

Comparative Study on Shale Characteristics of Different Sedimentary Microfacies of Late Permian Longtan Formation in Southwestern Guizhou, China [PDF]

Minerals, 2018
Organic-rich marine-continental transitional shales are widely distributed in Guizhou Province, China. Samples from the Late Permian Longtan Formation were investigated using organic petrography analysis, X-ray diffraction (XRD) analysis, field emission-scanning electron microscopy observations, mercury intrusion capillary pressure and gas adsorption ...
Ma, Xiao, Guo, Shaobin
openaire   +1 more source

Modeling and Risk Assessment of Geomagnetically Induced Currents During Geomagnetic Storm in the 500 kV Power Grid of Guangxi, China

Space Weather, Volume 23, Issue 11, November 2025.
Abstract Geomagnetic storms can induce geomagnetically induced currents (GIC) in power systems, posing threats to grid security. In this study, a GIC calculation model for the 500 kV power grid in Guangxi, China, is developed based on one‐dimensional (1D) and various three‐dimensional (3D) magnetotelluric (MT) impedance data.
Xuejian Zhang, Gilbert Pi, Zdeněk Němeček, Jana Šafránková, Tianqi Wang, Wenxin Kong, Chang Wei, Nian Yu   +7 more
wiley   +1 more source

Design Scheme of Application Library Tracks for City (Suburban) Railway Vehicle Bases

Chengshi guidao jiaotong yanjiu
[Objective] To enhance the overall efficiency of vehicle base engineering, reduce investment costs, and strengthen the technical reserves and adaptability of process design, research is carried out on the design schemes for operation workshop tracks in ...
WANG Jun
doaj   +1 more source

Mechanism of Roof‐Cutting by Densely Drilled Holes in Gob‐Side Entry Retaining and Its Main Influencing Factors

Energy Science &Engineering, Volume 13, Issue 10, Page 4794-4809, October 2025.
ABSTRACT Roof‐cutting by densely drilled holes (RCDDH) has been widely adopted in many coal mines across China as an innovative roof‐cutting technique. However, research on its underlying mechanism and key parameters remains limited, particularly regarding the failure mechanisms of the drilled holes.
Shaowei Liu, Xiaopeng Li, Mengxiong Fu, Yafei He, Kun Pan, Biao Hou, Deyin He   +6 more
wiley   +1 more source

Plan view of the Longtan Cave excavation area (upper) and stratigraphic layers (lower) (modified after Yongxiang Ye).

, 2014
Plan view of the Longtan Cave excavation area (upper) and stratigraphic layers (lower) (modified after Yongxiang Ye).
Song Xing (390829), Wanbo Huang (680760), José María Bermúdez de Castro (380162), Wu Liu (680761), María Martinón-Torres (418590), Yingqi Zhang (285021), Xiaoxiao Fan (680758), Longting Zheng (680759)   +7 more
core   +1 more source