Results 81 to 90 of about 84,062 (265)

Mechanisms behind grouting pressure jumping in low-permeability limestones and techniques for grouting pressure control

Meitian dizhi yu kantan
BackgroundThe exploitation of the Carboniferous-Permian coalfields in China is gradually transitioning toward coal seams in lower formations. In this context, issues including the confined water hazards in the floor and karst water preservation become ...
Zhenli FAN, Lutong CAO, Yong CUI, Zhiwei ZHANG, Fengda ZHANG   +4 more
doaj   +1 more source

The Study of Flowability and The Compressive Strength of Grout/Mortar Proportions for Pre- placed Concrete Aggregate (PAC) [PDF]

MATEC Web of Conferences, 2019
This experimental study is focused on the performance of appropriate grout/mortar for pre-placed aggregate concrete (PAC) incorporating superplasticizer in the mortar mixture regarding the flowability and strength of grout or mortar.
Chairunnisa Nursiah, Fardheny Arie Febry
doaj   +1 more source

Communication regarding sudden unexpected death in epilepsy to people with epilepsy and their caregivers: A scoping review from the ILAE Sudden Unexpected Death in Epilepsy Task Force

Epilepsia, EarlyView.
Abstract Discussing sudden unexpected death in epilepsy (SUDEP) is difficult and sensitive for health care providers (HCPs), people with epilepsy (PwE), and caregivers. This scoping review examines the literature on SUDEP communication, focusing on need, timing, content, methods, facilitators, barriers, and outcomes. We performed a thematic analysis to
Amir Aschner, Elizabeth J. Donner, Beate Diehl, Nathalie Jette, Leah J. Blank, Suvasini Sharma   +5 more
wiley   +1 more source

Testing of Great Bay Oysters for Two Protozoan Pathogens [PDF]

, 2009
Two protozoan pathogens, Haplosporidium nelsoni (MSX) and Perkinsus marinus (Dermo) are known to be present in Great Bay oysters. With funds provided by the Piscataqua Region Estuaries Partnership (PREP), the Marine Fisheries Division of New Hampshire ...
Grout, Douglas E.
core   +3 more sources

Stress Redistribution Mechanisms and Subsidence Control of Fluidized Gangue Backfilling in Underground Coal Mining: Integrated Experimental and Numerical Investigation

Energy Science &Engineering, EarlyView.
Fluidized gangue backfilling controls mining subsidence through stress redistribution in composite backfill‐pillar systems, reducing surface settlement and stress concentrations. Multi‐scale experimental and numerical analysis provides quantitative design parameters for optimizing ground control in sustainable underground coal mining operations ...
Weilong Zhang, Jie Zhang, Yuanzhen Zhang, Wenjing Liu, Liang Li, Deyi Nan, Guannan Zhao, Chen Yang, Haiqing Bian, Hua Shao, Xiao Zuo, Changtai Zhou   +11 more
wiley   +1 more source

Macroscopic and microscopic characteristics of nanosilica sol-based composite grout in sealing fractured argillaceous rock: A comparative study with silica sol and cement slurry

Journal of Materials Research and Technology
Argillaceous surrounding rock is prone to weakening when exposed to water, which can cause significant long-term deformations and instability in roadways.
Zhe Xiang, Nong Zhang, Dongjiang Pan, Zhengzheng Xie, Peng Wang, Dongxu Liang   +5 more
doaj   +1 more source

Developing Hybrid Machine Learning Models for Estimating the Unconfined Compressive Strength of Jet Grouting Composite: A Comparative Study

Applied Sciences, 2020
Coal-grout composites were fabricated in this study using the jet grouting (JG) technique to enhance coal mass in underground conditions. To evaluate the mechanical properties of the created coal-grout composite, its unconfined compressive strength (UCS)
Yuantian Sun, Guichen Li, Junfei Zhang
doaj   +1 more source

Study on the Influence of Slope Static Load on Shallow Lining Support Structure

Energy Science &Engineering, EarlyView.
On the basis of the background of the shallow‐buried main adit supported by stone lining, the mechanical model of the supporting structure is constructed, and the stability of the supporting structure is analyzed by using the methods of field investigation, theoretical analysis, and numerical simulation.
Hongwei Wang, Chaofeng Yuan, Jianqiang Jiao, Jinyuan Bai   +3 more
wiley   +1 more source

Soil Nail Design Optimization Through Adaptive Slope Stability Analysis Using Improved Limit Equilibrium Method

International Journal for Numerical and Analytical Methods in Geomechanics, EarlyView.
ABSTRACT Design optimization for automatically generating optimal design results is a promising technique for enhancing the efficiency of design processes and outcomes. However, its development for soil nail reinforced slopes is limited since the traditional slope stability analysis using the limit equilibrium method (LEM) becomes relatively time ...
Weihang Ouyang, Kai Liu, Si‐Wei Liu
wiley   +1 more source

Testing of Geat Bay Oysters for Two Protozoan Pathogens [PDF]

, 2014
Two protozoan pathogens, Haplosporidium nelsoni (MSX) and Perkinsus marinus (Dermo), are known to be present in Great Bay oysters. With funds provided by the Piscataqua Region Estuaries Partnership (PREP), the Marine Fisheries Division of the New ...
Grout, Douglas E.
core   +2 more sources