A New Method for Real-Time Monitoring of Grout Spread Through Fractured Rocks

2008 ◽  
Vol 1107 ◽  
Author(s):  
Alasdair E. Henderson ◽  
Iain A. Robertson ◽  
John M Whitfield ◽  
Graham F.G. Garrard ◽  
Nicholas G. Swannell ◽  
...  
Keyword(s):  
Rock Mass ◽  
Real Time ◽  
Fractured Rock ◽  
Field Trials ◽  
New Method ◽  
Real Time Monitoring ◽  
Retrieval Method ◽  
Extensive Field ◽  
Grout Spread ◽  
Rock Mass Permeability

AbstractReducing water ingress into the Shaft at Dounreay is essential for the success of future intermediate level waste (ILW) recovery using the dry retrieval method. The reduction is being realised by forming an engineered barrier of ultrafine cementitious grout injected into the fractured rock surrounding the Shaft. Grout penetration of 6m in <50μm fractures is being reliably achieved, with a pattern of repeated injections ultimately reducing rock mass permeability by up to three orders of magnitude.An extensive field trials period, involving over 200 grout mix designs and the construction of a full scale demonstration barrier, has yielded several new field techniques that improve the quality and reliability of cementitious grout injection for engineered barriers.In particular, a new method has been developed for tracking in real-time the spread of ultrafine cementitious grout through fractured rock and relating the injection characteristics to barrier design. Fieldwork by the multi-disciplinary international team included developing the injection and real-time monitoring techniques, pre- and post injection hydro-geological testing to quantify the magnitude and extent of changes in rock mass permeability, and correlation of grout spread with injection parameters to inform the main works grouting programme.

A new method of real-time monitoring of cutting tool status bases on HHT

2019 ◽  
Vol 9 (4) ◽  
pp. 276
Author(s):  
Qizheng Liu ◽  
qiang Guo ◽  
Zichao Lin ◽  
Bin Shen
Keyword(s):  
Real Time ◽  
Cutting Tool ◽  
New Method ◽  
Real Time Monitoring

New method for real-time monitoring of laser power and mode online

1998 ◽  
Author(s):  
You-qing Wang ◽  
Chengwu An ◽  
Shuzhong Gao ◽  
Dongsheng Lu
Keyword(s):  
Real Time ◽  
Laser Power ◽  
New Method ◽  
Real Time Monitoring

A new method for real-time monitoring of soil CO2 efflux

2012 ◽  
Vol 3 (5) ◽  
pp. 889-897 ◽  
Author(s):  
Martin Lavoie ◽  
Jen Owens ◽  
Dave Risk
Keyword(s):  
Real Time ◽  
Soil Co2 Efflux ◽  
New Method ◽  
Co2 Efflux ◽  
Soil Co2 ◽  
Real Time Monitoring

Seepage Field-Strain Field Coupling Analysis for Rock Masses of Coal Seam Floor during Mining Based on COMSOL

2014 ◽  
Vol 1010-1012 ◽  
pp. 1467-1470 ◽  
Author(s):  
Yun Jie Zhang ◽  
Cheng Fan
Keyword(s):  
Rock Mass ◽  
Permeability Coefficient ◽  
Fractured Rock ◽  
Dynamic Change ◽  
Stress And Strain ◽  
Seepage Field ◽  
Coupling Analysis ◽  
Field Coupling ◽  
Limestone Aquifers ◽  
Rock Mass Permeability

Based on the fluid-solid coupling theory, The fractured rock mass was described as a continuous porous medium, and consider the rock mass permeability coefficient has a relationship with the stress and strain. The dynamic change of permeability coefficient was achieved using the multi-physics coupling analysis software COMSOL, and found that the stress and strain of surrounding rocks changes a lot due to mining. The maximum stress and strain in the mudstone area reaches 2-3 times of the original one, which happened at the immediate roof of mined-out area. According to the analysis of seepage field, mining does not destroy water resistance of floor aquifer. Mining fissures do not connect limestone aquifers, and water in the limestone is less likely to flow into stop to cause damage.

A new method of real-time monitoring of cutting tool status bases on HHT

2019 ◽  
Vol 9 (4) ◽  
pp. 276
Author(s):  
Guoqiang Guo ◽  
Bin Shen ◽  
Qizheng Liu ◽  
Zichao Lin
Keyword(s):  
Real Time ◽  
Cutting Tool ◽  
New Method ◽  
Real Time Monitoring

Design of a versatile nanocomposite for ‘seeing’ drug release and action behavior

2015 ◽  
Vol 3 (43) ◽  
pp. 8449-8458 ◽  
Author(s):  
Yu Zhang ◽  
Tingting Shen ◽  
Xia Deng ◽  
Yufei Ma ◽  
Lina Wang ◽  
...  
Keyword(s):  
Rare Earth ◽  
Drug Release ◽  
Mesoporous Silica ◽  
Silica Nanoparticles ◽  
Real Time ◽  
Mesoporous Silica Nanoparticles ◽  
Magnetic Core ◽  
New Method ◽  
Rare Earth Complex ◽  
Real Time Monitoring

To design a new method for ‘seeing’ drug release and action behavior, we combined a rare-earth complex with a magnetic-core-coated phenyl mesoporous silica nanoparticles matrix, taking advantage of the drug coordination for real-time monitoring.

Real-time profiling of reflow process in VPS chamber

2017 ◽  
Vol 29 (1) ◽  
pp. 42-48 ◽  
Author(s):  
Lubomir Livovsky ◽  
Alena Pietrikova
Keyword(s):  
Real Time ◽  
Monitoring System ◽  
New Method ◽  
Real Time Monitoring ◽  
Reflow Process ◽  
Thermal Profile ◽  
Content Type ◽  
The Real ◽  
Heat Control ◽  
Power Modules

Purpose This paper aims to present a new method of real-time monitoring of thermal profiles applied in vapour phase soldering (VPS) reflow processes. The thermal profile setting is a significant variable that affects the quality of joints. The method allows rapid achievement of a required thermal profile based on software control that brings new efficiency to the reflow process and enhanced joint quality, especially for power electronics. Design/methodology/approach A real-time monitoring system based on computerized heat control was realized in a newly developed laboratory VPS chamber using a proportional integral derivation controller within the soldering process. The principle lies in the strictly accurate monitoring of the real defined reflow profile as a reference. Findings Very accurate maintenance of the required reflow profile temperature was achieved with high accuracy (± 2°C). The new method of monitoring and control of the reflow real-time profiling was verified at various maximal reflow temperatures (230°C, 240°C and 260°C). The method is feasible for reflowing three-dimensional (3D) power modules that use various types of solders. The real-time monitoring system based on computerised heat control helped to achieve various heights of vapour zone. Originality/value The paper describes construction of a newly developed laboratory-scale VPS chamber, including novel real-time profiling of the reflow process based on intelligent continuously measured temperatures at various horizontal positions. Real-time profiling in the laboratory VPS chamber allowed reflow soldering on 3D power modules (of greater dimensions) by applying various flux-less solder materials.

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