scholarly journals Overview of surface water hazards in China coalmines

2019 ◽  
Vol 14 (4) ◽  
pp. 851-862
Author(s):  
Herong Gui ◽  
Rongjie Hu ◽  
Honghai Zhao ◽  
Jun Li ◽  
Xiaomei Song ◽  
...  
Keyword(s):  
Surface Water ◽  
Water Inrush ◽  
Water Sources ◽  
Climatic Impact ◽  
Mining Conditions ◽  
Water Hazard ◽  
Major Factors ◽  
Water Hazards ◽  
The Relationship ◽  
Terrain Features

Abstract Among all recorded water disasters in China coalmines, 10% can be attributed to surface water, making it one of the top water hazards. Based on the analysis of cases of surface water hazards in China coalmines, this article determined surface water sources and inrush conduits as the major factors that have caused water inrush disasters in mines, and classified surface water hazards in China coalmines into 15 types according to those major factors and gave definitions of each type of surface water hazard. Then, it is proposed that there are different types of surface water hazards in different coal-bearing regions by analyzing the relationship to terrain features, climatic impact and mining conditions. Finally, we discuss how typical water sources and inrush conduits work together in hazard formation, in addition to the characteristics and corresponding preventative technologies. The propositions can be of reference for exchanges with other mining countries and regions on surface water hazard treatment.

scholarly journals Patterns of gob-water inrush in Chinese coalmines

2017 ◽  
Vol 12 (2) ◽  
pp. 444-452 ◽  
Author(s):  
Herong Gui ◽  
Manli Lin
Keyword(s):  
Water Inrush ◽  
Water Hazard ◽  
Caving Zone ◽  
Coal Pillars ◽  
Factor Interactions ◽  
Water Hazards

Gob-water is a serious hazard in Chinese coalmines. Such inrushes have caused more than 80% of the coalmine water accidents recorded in recent years. This study is based on reviews of past gob-water hazard cases in China. Six inrush patterns are suggested, caused by gobs exposed by tunneling, channeled by faults, or fissure or caving zone channeling, damage to or collapse of water-resistant coal pillars and multi-factor interactions. The results are of relevance in all coal-producing countries wishing to contain and treat gob-water hazards.

Prevention and Control of Surface Water Hazard in Coal Mine

2013 ◽  
Vol 353-356 ◽  
pp. 2559-2562 ◽  
Author(s):  
En Tai Guan
Keyword(s):  
Surface Water ◽  
Prevention And Control ◽  
Underground Mining ◽  
Mountainous Area ◽  
Karst Cave ◽  
Plain Area ◽  
Water Hazard ◽  
And Control ◽  
The Relationship ◽  
Water Passage

On the basis of different damage forms of surface water in coal mines, various prevention and control countermeasures to water hazard in different landforms, such as mountainous area, plain area and hilly area, were proposed. In general, the objects to be governed include river banks, plashes, slopes, gullies and surface collapses due to underground mining or karst cave to avoid the hazard. The principle is cutting off the relationship or passage between surface water and underground mining. Furthermore, advices and techniques on water passage detection were put forward to carry out the following work.

Changing Places: Rock Art and Holocene Landscapes in the Wadi al-Ajal, South-West Libya

2014 ◽  
Vol 12 (2) ◽  
pp. 165-182 ◽  
Author(s):  
Tertia Barnett ◽  
Maria Guagnin
Keyword(s):  
Spatial Analysis ◽  
Surface Water ◽  
Rock Art ◽  
Human Settlement ◽  
Gis Model ◽  
South West ◽  
Settlement Location ◽  
Central Sahara ◽  
The Relationship ◽  
Over Time

This article examines the relationship between rock art and landscape use by pastoral groups and early settled communities in the central Sahara from around 6000 BC to 1000 AD. During this period the region experienced significant climatic and environmental fluctuations. Using new results from a systematic survey in the Wadi al-Ajal, south-west Libya, our research combines data from over 2000 engraved rock art panels with local archaeological and palaeoenvironmental evidence within a GIS model. Spatial analysis of these data indicates a correspondence between the frequency of rock art sites and human settlement over time. However, while changes in settlement location were guided primarily by the constraints on accessibility imposed by surface water, the distribution of rock art relates to the availability of pasture and patterns of movement through the landscape. Although the reasons for these movements undoubtedly altered over time, natural routes that connected the Wadi al-Ajal and areas to the south continued to be a focus for carvings over several thousand years.

Water Hazard Detection Based on 3D LIDAR

2014 ◽  
Vol 668-669 ◽  
pp. 1174-1177 ◽  
Author(s):  
Hai Yan Shao ◽  
Zhen Hai Zhang ◽  
Ke Jie Li ◽  
Jian Wang ◽  
Tao Xu ◽  
...  
Keyword(s):  
Unmanned Ground Vehicle ◽  
Data Format ◽  
Ground Vehicle ◽  
Air Water Interface ◽  
Water Hazard ◽  
Outdoor Environments ◽  
Bodies Of Water ◽  
3D Lidar ◽  
Water Hazards ◽  
Complicated Task

Autonomous off-road navigation is a highly complicated task for a robot or unmanned ground vehicle (UGV) owing to the different kinds of obstacles it could encounter. In-particular, water hazards such as puddles and ponds are very common in outdoor environments and are hard to detect even with ranging devices due to the specular nature of reflection at the air water interface. In recent years, many researches to detect the water bodies have been done. But there still has been very little work on detecting bodies of water that could be navigation hazards, especially at night. In this paper, we used Velodyne HDL-64ES2 3D LIDAR to detect water hazard. The approach first analyzes the data format and transformation of 3D LIDAR, and then writes the data acquisition and visualizations algorithm, integrated data based on ICP algorithm. Finally according the intensity distribution identifies the water hazard. Experiments are carried out on the experimental car in campus, and results show the promising performance.

scholarly journals Perceived agricultural runoff impact on drinking water

2014 ◽  
Vol 12 (3) ◽  
pp. 484-491 ◽  
Author(s):  
Andrea Crampton ◽  
Angela T. Ragusa
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Surface Water ◽  
Agricultural Runoff ◽  
Water Sources ◽  
Urban Residents ◽  
Agricultural Activity ◽  
Rural Residents ◽  
Management Measures ◽  
Agricultural Contaminants

Agricultural runoff into surface water is a problem in Australia, as it is in arguably all agriculturally active countries. While farm practices and resource management measures are employed to reduce downstream effects, they are often either technically insufficient or practically unsustainable. Therefore, consumers may still be exposed to agrichemicals whenever they turn on the tap. For rural residents surrounded by agriculture, the link between agriculture and water quality is easy to make and thus informed decisions about water consumption are possible. Urban residents, however, are removed from agricultural activity and indeed drinking water sources. Urban and rural residents were interviewed to identify perceptions of agriculture's impact on drinking water. Rural residents thought agriculture could impact their water quality and, in many cases, actively avoided it, often preferring tank to surface water sources. Urban residents generally did not perceive agriculture to pose health risks to their drinking water. Although there are more agricultural contaminants recognised in the latest Australian Drinking Water Guidelines than previously, we argue this is insufficient to enhance consumer protection. Health authorities may better serve the public by improving their proactivity and providing communities and water utilities with the capacity to effectively monitor and address agricultural runoff.

Using Satellite Imagery to Examine the Relationship between Surface-Water Dynamics of the Salt Lakes of Western Texas and Ogallala Aquifer Depletion

Wetlands ◽  
2017 ◽  
Vol 37 (6) ◽  
pp. 1055-1065 ◽  
Author(s):  
L. J. Heintzman ◽  
S. M. Starr ◽  
K. R. Mulligan ◽  
L. S. Barbato ◽  
N. E. McIntyre
Keyword(s):  
Surface Water ◽  
Satellite Imagery ◽  
Water Dynamics ◽  
Salt Lakes ◽  
Ogallala Aquifer ◽  
Aquifer Depletion ◽  
The Relationship

Legionella and Public Water Supplies

1988 ◽  
Vol 20 (11-12) ◽  
pp. 5-10 ◽  
Author(s):  
J. S. Colbourne ◽  
P. J. Dennis ◽  
R. M. Trew ◽  
C. Berry ◽  
G. Vesey
Keyword(s):  
Surface Water ◽  
Heat Shock ◽  
Distribution Systems ◽  
Potable Water ◽  
Water Sources ◽  
Water Supplies ◽  
Indirect Immunofluorescent Assay ◽  
Water Mains ◽  
Legionnaires Disease ◽  
Indirect Immunofluorescent

A survey for legionella in public water supplies in England failed to detect culturable L.pneumophila in all but samples from taps in buildings; however, the organism was detected in underground and surface water sources and distribution systems using an indirect immunofluorescent assay (IFA) to L.pneumophila serogroup 1. Culturability was related to water temperatures above 20°C. In water mains L.pneumophila was associated with biofilms or sediment. Non-culturable L.pneumophila detected in potable waters by IFA were recovered by heat shock experiments demonstrating their viability. Although the strain found in potable water is rarely asociated with disease, monoclonal expression, a virulence marker, was altered by heat shock. These findings have implications for the prevention of legionellosis and may explain the sporadic nature of legionnaires disease in the community.

scholarly journals Correlation between Job Burnout and Fear of COVID-19 among ICU and CCU Nurses

2021 ◽  
Author(s):  
F. Golabi ◽  
M. B. Alizadeh Aghdam ◽  
H. Akbarian ◽  
M. M. Hosseini Mazraehshadi
Keyword(s):  
Nursing Care ◽  
Emotional Exhaustion ◽  
Maslach Burnout Inventory ◽  
Job Burnout ◽  
Personal Accomplishment ◽  
Occupational Burnout ◽  
Major Factors ◽  
The Relationship ◽  
Quality Of Nursing

Abstract Background: Occupational burnout among nurses is one of the major factors which affect the quality of nursing care. Assessing the relationship between burnout and its associated factors is one of the most basic things that should be done so that later, actions can be taken to reduce burnout. Fear of COVID-19 is one of the factors that can increase burnout of nurses during the Coronavirus Disease 2019(COVID-19) pandemic.Aim: To investigate the relationship between job burnout and fear of COVID-19 among ICU and CCU nurses.Methods: The Maslach Burnout Inventory (MBI) and the Fear of COVID-19 Scale (FCV-19S) were distributed to ICU and CCU nurses (n = 170) at Shahid Madani Cardiac Hospital, Tabriz, Iran, and the correlation between job burnout and fear of COVID-19 was calculated.Results: The results show that the level of emotional exhaustion and reduced personal accomplishment among participants of this study is average, and depersonalization is at a low level. Also, the level of fear of coronavirus is below average among the respondents. The research showed that emotional exhaustion and fear of COVID-19 were positively correlated (p < 0.05), but there was not any significant correlation between depersonalization and fear of Coronavirus; as the relationship between reduced personal accomplishment and fear of COVID-19. In addition, there were significant correlations between age and reduced personal accomplishment, as well as marital status and reduced personal accomplishment (p < 0.05). On the other hand, the results showed that there were not any significant correlations between gender and burnout dimensions, nor between educational degree and burnout dimensions.Conclusion: As job burnout reduces the quality of nursing care, managers must take strategies that reduce job burnout. One of the strategies that they can take is to reduce the fear of COVID-19 by taking wise strategies.

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