Results 91 to 100 of about 807,311 (310)

Multiphysics Coupled Response of Stress and Seepage in Coal Under Borehole Disturbance and Optimization of Borehole Parameters

Energy Science &Engineering, EarlyView.
One‐way FLAC3D‐COMSOL coupled modeling and field validation show that a 150 mm borehole radius with 5 m spacing provides the best coordination of plastic‐zone expansion, stress relief, permeability enhancement, and gas‐pressure attenuation, increasing the pure gas drainage rate by 35.4%. ABSTRACT To rationally determine the borehole radius and borehole
Yewu Bi, Yichen Li, Yangyang Guo, Yikai Zhang, Jiazhi Sun, Kangnan Li, Yongpeng Fan, Qixian Li   +7 more
wiley   +1 more source

Research progress on the application and development of the material point method in dynamic simulation of geological hazards

Zhongguo dizhi zaihai yu fangzhi xuebao
Numerical simulation is commonly used to address large deformation geological disasters such as collapses, landslides, and debris flows. Accurately and efficiently simulating these issues has always been a challenge.
Mengchen WANG, Bin LI, Jiawei WAN, Yang GAO, Wenpei WANG   +4 more
doaj   +1 more source

Study on Roof‐Control Technology for Gob‐Side Entry Retaining Under Composite Roofs

Energy Science &Engineering, EarlyView.
This study develops a roof‐control technology system for gob‐side entry retaining under composite roofs. By integrating field measurements, theoretical analysis, and numerical simulation, it reveals the spatiotemporal evolution of the plastic zone and proposes a targeted support method, providing theoretical and practical guidance for safe and ...
Dong Li, Yujiang Zhang, Yunlou Du, Haodong Zheng, Baoji Yang   +4 more
wiley   +1 more source

Characteristics Analysis and Stage Division of Class Ⅰ Gas Hydrate Deposit Developed by Vertical Well and Depressurization Based on Numerical Analysis

Energy Science &Engineering, EarlyView.
The production process can be divided into two stages according to the relationship between the gas production rate and the decomposition gas rate. The ratio of cumulative decomposition gas to cumulative gas production can be used to evaluate the contribution of the gas hydrate layer.
Nu Lu, Bo Zhang, Jian Hou, Yajie Bai, Yongge Liu   +4 more
wiley   +1 more source

Geological Survey of Victoria. No. 5 [cartographic material]

Caption title.; Quarter sheet 5SW is a geological map centred on a mountainous region adjacent to the parish of Rochford in the county of Bourke with cadastral details. Includes nine short notes in the top left margin.
Geological Survey of Victoria.
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Digitized log file, Utah Geological Survey Well Number U068

, 2008
This log was digitized by the Utah Geological Survey from image files (.tiff) compiled by the Utah Division of Oil, Gas, and ...
Digitized by the Utah Geological Survey
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Damage Characteristics and Stress Distribution Law of Overburden Rock in Multiple Mining of Close Coal Seams

Energy Science &Engineering, EarlyView.
This study on close coal seams shows that multi‐seam mining increases the height of the fractured zone from approximately 26 m (single upper‐seam mining) to about 49 m. When the lower seam is mined after the extraction of the upper seam, the heights of both the caved zone and the fractured zone increase by approximately two times.
Xiaoyu Wu, Lei Guo, Zedong Sun, Xiaowei Wu, Nan Zhang   +4 more
wiley   +1 more source

Research on transparency of coal mine geological conditions based on distributed fiber‐optic sensing technology

Deep Underground Science and Engineering
Coal mining induces changes in the nature of rock and soil bodies, as well as hydrogeological conditions, which can easily trigger the occurrence of geological disasters such as water inrush, movement of the coal seam roof and floor, and rock burst ...
Chunde Piao, Yanzhu Yin, Zhihao He, Wenchi Du, Guangqing Wei   +4 more
doaj   +1 more source

Susceptibility assessment of geological hazards in Shenzhen Town, Ninghai county based on the APH-CF model

Frontiers in Earth Science
IntroductionThis work employs a coupled evaluation model that integrates deterministic coefficients with the Analytic Hierarchy Process to conduct a comprehensive assessment of geological disaster susceptibility in Shenzhen Town, Ninghai County ...
Shuai Han, Ran Li, Ran Li, Ran Li, Shujun Hui, Qiang Sun, Taili Zhang   +6 more
doaj   +1 more source

Geological Survey of Victoria. No. 6 : N.E., Part of Lancefield, Part of Springfield [cartographic material] /

Geological map of the town of Romsey on the top left of the map, with many numbered land allotments between the mountain ranges. The Parishes of Monegeetta and Chintin are indicated on the map. Includes two geological note in the right margin.
Geological Survey of Victoria.
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