Geotechnical Instrumentation: Monitoring Longitudinal Stress of a High Pressure Pipeline During Longwall Mining Operations — A Case Study in West Virginia

2016 ◽  
Author(s):  
Martin P. Derby ◽  
Mark D. Saunders ◽  
Benjamin Zand
Keyword(s):  
High Pressure ◽  
West Virginia ◽  
Stress Analysis ◽  
Longwall Mining ◽  
Monitoring Program ◽  
Solar Array ◽  
Strain Gages ◽  
Mining Operations ◽  
Strain Monitoring ◽  
Implementation Program

Longwall mining operations could compromise the integrity of high pressure pipelines by way of surface subsidence and soil strains. Prior to implementing field programs for monitoring subsidence, a preliminary mitigation/stress analysis study should be designed to determine the possible effects of the longwall mining operations on the pipeline(s). If the stress analysis indicates possible high stresses beyond the allowable limits of a pipeline, then a mitigation plan should be developed and implemented. Regardless of the anticipated stress level in a pipeline, a strain monitoring program is usually recommended. The purpose of this paper is to discuss the design of a pipeline strain monitoring program, which includes the installation of strain gages at critical locations along two adjacent pipelines. The study area includes a 12 inch diameter steel pipeline (for natural gas transport) and a 12 inch HDPE pipeline for water transport. The study area is located in a mountainous region of West Virginia. Prior to the field program, a laboratory pilot study was performed with strain gages on a test section of HDPE pipe to determine the best mounting procedures. The field implementation program included the installation of strain gages on the gas and water pipelines. Multiplexers, data loggers, a solar array and a satellite modem for 24/7 data transfer were installed, and monitored throughout the study. During the field implementation program several meteorological and geologic events occurred which caused some design changes in the field program.

Stress Analysis and Strength Checking for High Pressure Gas Pipeline in the Earthquake Rupture Area

2013 ◽  
Vol 470 ◽  
pp. 866-870
Author(s):  
Wei He ◽  
Yan Dong Liu ◽  
Guo Xing Wang
Keyword(s):  
Finite Element ◽  
High Pressure ◽  
Stress Analysis ◽  
Gas Pipeline ◽  
Earthquake Rupture ◽  
Rupture Area ◽  
Pipeline Crossing ◽  
The Way

Based on the actual project example of high pressure gas pipeline crossing earthquake rupture area, the paper shows and explains the way to make stress analysis and strength checking calculation for the high pressure gas pipeline in the earthquake rupture area by the method of finite element.

Hybrid stress analysis of perforated composites using strain gages

2001 ◽  
Vol 41 (2) ◽  
pp. 195-203 ◽  
Author(s):  
T. H. Baek ◽  
R. E. Rowlands
Keyword(s):  
Stress Analysis ◽  
Strain Gages ◽  
Hybrid Stress

Wind Energy Resource Assessment and Power Production Estimates as an Undergraduate Project

2012 ◽  
Author(s):  
Andrew C. Nix ◽  
Seth A. Lawson ◽  
Robert G. Murphy
Keyword(s):  
West Virginia ◽  
Wind Energy ◽  
Large Scale ◽  
Control Volume ◽  
Monitoring Program ◽  
Energy Resource ◽  
Power Production ◽  
Monitoring Station ◽  
Design Project ◽  
Senior Design

It is common practice to install wind-monitoring stations in geographical locations having high winds to estimate power production prior to installing large-scale wind farms. For the current study, a wind-monitoring program was developed as an educational tool for undergraduate engineering students at West Virginia University. The focus of this paper is not on the results of the assessment, but rather on how this program was used as a hands-on approach for educating students about wind energy and availability. The objective of the student/industry collaborative project was to determine the feasibility of constructing a wind farm to power a federal prison facility located in an area with an abundant wind resource in North Central West Virginia, while educating students on wind energy. This paper presents a description and assessment of this program as an undergraduate senior design project. As part of the program, students played a key role from the developmental stages of the project, to the assessment of the results. During the first semester of the senior design project, students procured a wind monitoring station based on down-select criteria, selected the site for construction, installed the wind monitoring station, commissioned the sensor suite, and performed quality assurance/quality control (QA/QC) of and evaluated the initial data sets. Students logged data through the second semester of the program, performed data quality monitoring, processed average wind speed and direction data into frequency distributions and wind roses, analyzed monthly and diurnal averages in wind resources and performed power production calculations. Several different methodologies were employed, including application of fluid control volume energy analysis to derive Betz’ limit, turbine efficiency curves with operational limits and Weibull statistics to employ online power production estimators. The program successfully introduced students to the applicability of their engineering education to the area of renewable energy.

The effects of high pressure on foil strain gages

1964 ◽  
Vol 4 (2) ◽  
pp. 25-36 ◽  
Author(s):  
R. V. Milligan
Keyword(s):  
High Pressure ◽  
Strain Gages
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