A Study on the Formation Mechanism and Preventive Measures of Coal-Mining Ground Fissures in the South-West of Pingyao

2011 ◽  
Vol 90-93 ◽  
pp. 1341-1344 ◽  
Author(s):  
Chang Song Zhou ◽  
Xiu Qing Zheng ◽  
Li Yuan Zheng ◽  
Xiao Ou Wei
Keyword(s):  
Coal Mining ◽  
Formation Mechanism ◽  
Mining Area ◽  
Control Measures ◽  
Systematic Analysis ◽  
Ground Fissure ◽  
Ground Fissures ◽  
Basic Characteristics ◽  
Prevention And Control Measures ◽  
Groundwater Drainage

According to the basic characteristics of geological environment in Pingyao mining area, we analyzed the relationship between coal mining and the ground fissure disasters in recent years. The result shows that the mine goaf is the essential factor for the formation of ground fissure, and the precipitation and groundwater drainage accelerates its development. Based on a systematic analysis of classification of goaf as well as the distribution characteristics and the formation mechanism of ground fissure, we found that the ground fissure in this area is non-tectonic, and thus proposed corresponding prevention and control measures. Research results would provide basis for the improvement of local environmental conditions and the control of geological disasters.

Chongqing Mine Ecological Restoration and Management Research

2013 ◽  
Vol 864-867 ◽  
pp. 1307-1310
Author(s):  
Ya Jun Zang
Keyword(s):  
Coal Mining ◽  
Ecological Restoration ◽  
Land Reclamation ◽  
Mining Area ◽  
Control Measures ◽  
Management Research ◽  
Paper Briefly ◽  
Research Results ◽  
Geological Disasters ◽  
Ecological Reconstruction

This paper briefly introduces the importance of the process of coal mining and mining later land reclamation and ecological restoration and the characteristics of the land ecological reconstruction of mining area. According to the research results of mine disaster in Chongqing area and the existing environment prevention and harnessing measures, make division of geological disasters, and put forward the corresponding control measures.

A Region of Coal Mine Geological Environmental Survey Assessment and Prevention Countermeasures

2013 ◽  
Vol 726-731 ◽  
pp. 1078-1084
Author(s):  
Jin Xiao
Keyword(s):  
Prevention And Control ◽  
Mining Area ◽  
Control Measures ◽  
Ecological Environment ◽  
Coal Resources ◽  
Exploitation And Utilization ◽  
Geologic Hazards ◽  
Prevention And Control Measures ◽  
And Control ◽  
Geologic Environment

Exploitation and utilization of coal resources will cause disturbances to the geologic environment and damages to the geologic environment conditions of the mining area, and lead to damages to ecological environment, formation of geologic hazards of mines and environmental pollution in the mining area. In this paper, current geologic environment of mines is investigated, and geologic environment problems of mines are assessed and prevention and control measures are researched on a basis of classified areas, with Dazhou, which is an important city in East Sichuan and where coal resources are rich and exploited frequently, as an example, to provide reference for protection, treatment and recovery of geologic environment of coal mines in East Sichuan.

scholarly journals Level of Knowledge and Risk Factors for Visceral Leishmaniasis in a Mining Area of Minas Gerais State, Brazil

2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Carina Margonari ◽  
Júlia Alves Menezes ◽  
Gustavo Mayr de Lima Carvalho ◽  
Júlia Bahia Miranda ◽  
Fabrizio Furtado de Sousa ◽  
...  
Keyword(s):  
Protective Factor ◽  
Mining Area ◽  
Minas Gerais ◽  
Control Measures ◽  
Older Individuals ◽  
Male Population ◽  
Female Population ◽  
Highly Educated ◽  
Prophylactic Measures ◽  
Prevention And Control Measures

Aiming to optimize and adjust leishmaniasis prevention and control measures for the resident population of Pains, state of Minas Gerais, Brazil, a structured questionnaire containing conceptual questions and questions about household characteristics was used to evaluate knowledge level and exposure risk. A total of 396 individuals were interviewed revealing unscientific and fragmented knowledge about the subject for most of the studied population. The female population was found to have 1.68 times more chance of knowing about the disease than the male population, while highly educated individuals were found to have 2.92 times more chances of knowing about leishmaniasis compared to basic educated individuals. All of the respondents reported the presence of, at least, one risk factor, while ages ≥40 years were considered a protective factor compared to younger ages, indicating that older individuals are more likely to recognize risks and protect themselves against leishmaniasis. These results will contribute to the production of didactic materials for the population with respect to their previous knowledge and will provide a basis for control and prophylactic measures.

scholarly journals Influence of Mine Earthquake Disturbance on the Principal Stress of the Main Roadway near the Goaf and Its Prevention and Control Measures

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Jiazhuo Li ◽  
Penghui Guo ◽  
Heng Cui ◽  
Xiqing Hao ◽  
Lihua Tian ◽  
...  
Keyword(s):  
Principal Stress ◽  
Coal Mine ◽  
Prevention And Control ◽  
Mining Area ◽  
Surrounding Rock ◽  
Control Measures ◽  
Pressure Relief ◽  
Mining Depth ◽  
Prevention And Control Measures ◽  
And Control

With the reduction and depletion of shallow energy, the mining depth of coal around the world is increasing year by year, and the mining depth of some coal mines in China has reached kilometers. The main roadway near the goaf with the deep high static stress is very easy to be damaged after being disturbed by the mine earthquake. Taking the main roadway in the no. 1 mining area of Gaojiapu coal mine in Binchang mining area, Shaanxi Province, China, as the engineering background, the high-energy mine earthquake monitored by the on-site microseism is equivalently simulated through the dynamic module of FLAC3D, and the spatial-temporal rotation characteristics of the principal stress of roadway surrounding rock under the disturbance of mine earthquake are studied and analyzed and put forward corresponding prevention and control measures. Research shows early stage of mine earthquake disturbance, roadway roof is first affected, and the principal stress of the roof has the trend of deflection to the side of the goaf. In the middle stage of mine earthquake disturbance, the main body of roof principal stress deflects to the side of goaf, and the deflection range is large. In the later stage of mine earthquake disturbance, the principal stress directions in the surrounding rock reverse rotation, and the reverse rotation angle of the principal stress direction in the roof is the largest. Finally, the asymmetric distribution characteristics of principal stress rotation are verified by using the asymmetric deformation phenomenon on both sides of roadway surrounding rock. Based on the rotation characteristics of principal stress under the dual influence of mine earthquake disturbance and goaf, optimize the layout scheme and blasting parameters of blasting pressure relief holes. The transmission direction of principal stress can be changed by blasting pressure relief method; meanwhile, the transmission of principal stress can be blocked; through the comparison of microseismic activity law before and after pressure relief, pressure relief effect is good. The research results can provide a certain reference basis for coal mine roadway pressure relief and reducing disaster conditions.

Knowledge and Awareness of Dengue Fever

2018 ◽  
pp. 219-222
Author(s):  
Y. Arockia Suganthi ◽  
Chitra K. ◽  
J. Magelin Mary
Keyword(s):  
Dengue Fever ◽  
Prevention And Control ◽  
Control Measures ◽  
Infection Transmission ◽  
Standard Guideline ◽  
The World ◽  
Different Types ◽  
Prevention And Control Measures ◽  
Dengue Prevention ◽  
And Control

Dengue fever is a painful mosquito-borne infection caused by different types of virus in various localities of the world. There is no particular medicine or vaccine to treat person suffering from dengue fever. Dengue viruses are transmitted by the bite of female Aedes (Ae) mosquitoes. Dengue fever viruses are mainly transmitted by Aedes which can be active in tropical or subtropical climates. Aedes Aegypti is the key step to avoid infection transmission to save millions of people in all over the world. This paper provides a standard guideline in the planning of dengue prevention and control measures. At the same time gives the priorities including clinical management and hospitalized dengue patients have to address essentially.

An evaluation model of 2019-nCoV prevention effectiveness based on immigration data in China (Preprint)

2020 ◽  
Author(s):  
Qiangsheng Huang
Keyword(s):  
Prevention And Control ◽  
Time Window ◽  
Evaluation Model ◽  
Control Measures ◽  
Related Data ◽  
The Face ◽  
Prevention And Control Measures ◽  
And Control ◽  
Best Fit

BACKGROUND As of the end of February 2020, 2019-nCoV is currently well controlled in China. However, the virus is now spreading globally. OBJECTIVE This study aimed to evaluate the effectiveness of outbreak prevention and control measures in a region. METHODS A model is built for find the best fit for two sets of data (the number of daily new diagnosed, and the risk value of incoming immigration population). The parameters (offset and time window) in the model can be used as the evaluation of effectiveness of outbreak prevention and control. RESULTS Through study, it is found that the parameter offset and time window in the model can accurately reflect the prevention effectiveness. Some related data and public news confirm this result. And this method has advantages over the method using R0 in two aspects. CONCLUSIONS If the epidemic situation is well controlled, the virus is not terrible. Now the daily new diagnosed patients in most regions of China is quickly reduced to zero or close to zero. Chinese can do a good job in the face of huge epidemic pressure. Therefore, if other countries can do well in prevention and control, the epidemic in those places can also pass quickly.

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