A study aimed at the coal seam group E and F in Pingdingshan mining area has been completed. This study is on the relationship of the coal seam methane reserve to coal thickness, coal rank, coal seam depth, surroundin...A study aimed at the coal seam group E and F in Pingdingshan mining area has been completed. This study is on the relationship of the coal seam methane reserve to coal thickness, coal rank, coal seam depth, surrounding rock and geological structure and other factors. The study indicates that different geological factor plays different role in controlling the law of coal seam methane reserve. The coal seam methane rich area, which was formed because of various factors and comprehensive effect, is the coal and methane outburst prone area, and also the key area for coal bed methane recovery. Among all factors, coal seam depth and geological structure is more important factor in affecting coal seam methane content in Pingdingshan mining area.展开更多
The vulnerability of Egypt to potential impacts of sea level rise has been considered. It was recognized that many locations in Egyptian Coast, on Mediterranean Sea （Mersa Matruh, Alexandria and Port Said） and on Re...The vulnerability of Egypt to potential impacts of sea level rise has been considered. It was recognized that many locations in Egyptian Coast, on Mediterranean Sea （Mersa Matruh, Alexandria and Port Said） and on Red Sea （Hurghada）, are highly vulnerable to the potential impacts of sea level rise, salt water intrusion and increase of frequency and severity of storm surges. The aim of this study is to investigate the monthly average and the variations of sea level and meteorological conditions along the Egyptian Mediterranean and north Red Sea coasts. Monthly mean cycles and correlation coefficients between MSL （Mean Sea Level） and different meteorological parameters were also calculated. The analyzed data was from 2007 to 2009 covering 3 years of hourly recorded sea level and meteorological parameters were used except for Hurghada sea level was for 2007 and 2008. Sea level harmonic analyses were done by using TOGA （Tropical Ocean and Global Atmosphere） software. Sea level variations were also computed, and it was 20.1,20, 0.1 and 55.3 cm in Alexandria, Port Said, Mersa Matruh and Hurghada respectively. The annual of the tidal constituents were computed to determine the MSL. Surge calculations were done by using TOGA software and eliminating the predicted tide from the observed sea level. The average calculated surge was also analyzed that the highest surge happened during summer and the lowest during winter in Alexandria and Port Said, while the highest surge was during winter and the lowest during summer in Hurghada. The surge variation was very weak in Mersa Matruh. The result of multiple regression analysis is a statistically significant relationship between the variables at the 99% confidence level.展开更多
文摘A study aimed at the coal seam group E and F in Pingdingshan mining area has been completed. This study is on the relationship of the coal seam methane reserve to coal thickness, coal rank, coal seam depth, surrounding rock and geological structure and other factors. The study indicates that different geological factor plays different role in controlling the law of coal seam methane reserve. The coal seam methane rich area, which was formed because of various factors and comprehensive effect, is the coal and methane outburst prone area, and also the key area for coal bed methane recovery. Among all factors, coal seam depth and geological structure is more important factor in affecting coal seam methane content in Pingdingshan mining area.
文摘The vulnerability of Egypt to potential impacts of sea level rise has been considered. It was recognized that many locations in Egyptian Coast, on Mediterranean Sea （Mersa Matruh, Alexandria and Port Said） and on Red Sea （Hurghada）, are highly vulnerable to the potential impacts of sea level rise, salt water intrusion and increase of frequency and severity of storm surges. The aim of this study is to investigate the monthly average and the variations of sea level and meteorological conditions along the Egyptian Mediterranean and north Red Sea coasts. Monthly mean cycles and correlation coefficients between MSL （Mean Sea Level） and different meteorological parameters were also calculated. The analyzed data was from 2007 to 2009 covering 3 years of hourly recorded sea level and meteorological parameters were used except for Hurghada sea level was for 2007 and 2008. Sea level harmonic analyses were done by using TOGA （Tropical Ocean and Global Atmosphere） software. Sea level variations were also computed, and it was 20.1,20, 0.1 and 55.3 cm in Alexandria, Port Said, Mersa Matruh and Hurghada respectively. The annual of the tidal constituents were computed to determine the MSL. Surge calculations were done by using TOGA software and eliminating the predicted tide from the observed sea level. The average calculated surge was also analyzed that the highest surge happened during summer and the lowest during winter in Alexandria and Port Said, while the highest surge was during winter and the lowest during summer in Hurghada. The surge variation was very weak in Mersa Matruh. The result of multiple regression analysis is a statistically significant relationship between the variables at the 99% confidence level.
