Results 31 to 40 of about 18,765 (251)

Modeling and experimental validation of bolt–grout bond–slip behavior for deep underground excavation support

open access: yesDeep Underground Science and Engineering, EarlyView.
A novel shear‐lag model, validated by pull‐out tests, incorporates a constant bond stress stage to predict the complete load–displacement response of grouted rock bolts, providing a new tool for optimizing anchorage length and material toughness in deep underground engineering. Abstract The stability of rock masses in deep underground excavations, such
Wenhui Bian   +6 more
wiley   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

open access: yesDeep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu   +4 more
wiley   +1 more source

Modelling of the stress-strain state of block rock mass of ore deposits during development by caving mining systems

open access: yesЗаписки Горного института, 2023
The article is devoted to the analysis of approaches to modeling the stress-strain state of a block rock mass in the vicinity of a single mine workings and in the area of rock cantilever influence during the development of the Khibiny apatite-nepheline ...
Anatoliy G. Protosenya   +2 more
doaj  

Mechanistic insights across curing regimes for enzymatic and biopolymer‐optimized reinforcement in rock masses

open access: yesDeep Underground Science and Engineering, EarlyView.
This study examines the effects of curing temperature on the mechanical behavior of underground rock masses treated with enzyme‐induced calcite precipitation (EICP) and an innovative biopolymer‐modified EICP (BP‐EICP). Abstract Biocementation is an innovative and sustainable technique for reinforcing weak and weathered rock masses in natural and ...
Mary C. Ngoma, Oladoyin Kolawole
wiley   +1 more source

Fracturing parameter optimization technology for highly deviated wells in complex lithologic reservoirs

open access: yesFrontiers in Energy Research, 2023
Highly-deviated wells are the key technology to reduce the risk of drilling accidents and improve the utilization of reservoirs. However, for reservoirs with complex lithology, highly-deviated wells are faced with the problems of geomechanical ...
Lihua Hao   +6 more
doaj   +1 more source

Mechanism and disaster control new technology of strong ground pressure manifestation in ultra‐large mining face

open access: yesDeep Underground Science and Engineering, EarlyView.
In response to the problem of strong mining pressure manifestation along the goaf roadway in a thick coal seam mining area, this study uses a new type of combined blasting roof cutting technology to effectively control the manifestation and deformation of mining pressure along the goaf roadway.
Xiaoding Xu   +6 more
wiley   +1 more source

Introduction to this special section: Geomechanics

open access: yes, 2018
Geomechanics is the study of the mechanical properties, conditions, and behavior of the subsurface. It can be applied at a range of scales, from tectonic to regional studies, through reservoir characterization, down to well studies, which can be vital ...
Marisela Sanchez-Nagel   +4 more
core   +1 more source

Assessment of causes of overpressure different from sub-compaction: Application in unconventional reservoir

open access: yesCT&F Ciencia, Tecnología & Futuro, 2019
The necessity for hydrocarbon-producing countries to increase their reserves has led to companies exploring the deposits available in source rocks that might be over-pressured and thus, strict rules are required for their development. Overpressure, which
Diego Armando Vargas-Silva   +2 more
doaj   +1 more source

Upper bound limit analysis of coral reef limestone cavern roof stability incorporating a tension‐shear failure mechanism with tensile‐strength cut‐off

open access: yesDeep Underground Science and Engineering, EarlyView.
For the roof of coral reef limestone caverns, a novel tension‐shear composite failure mechanism was developed. The most critical tensile crack model was identified using a hybrid optimization algorithm, and the stability of the cavern roof was analyzed accordingly.
Dongsheng Xu, Chenxu Li, Chuantan Hou
wiley   +1 more source

A critical review on coupled geomechanics and fluid flow in naturally fractured reservoirs. [PDF]

open access: yes, 2021
Naturally fractured reservoirs have been a source of challenging issues with regard to field development, well stability, drilling, and enhanced oil recovery, as a connected fracture system can totally dominate the flow patterns.
Faisal, Nadimul Haque   +5 more
core   +1 more source

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