In this paper numerical analysis of underground structures, taking account the transverse isotropy system of rocks, was done using CAST 3M code by varying the shape of excavation and the coefficient of earth pressure ...In this paper numerical analysis of underground structures, taking account the transverse isotropy system of rocks, was done using CAST 3M code by varying the shape of excavation and the coefficient of earth pressure k. Numerical results reveal that the anisotropy behavior, the shape of hole and the coefficient of earth pressure k have significant influence to the mining induced stress field and rock deformations which directly control the stability of underground excavation design. The magnitude of horizontal stress obtained for the horse shoe shape excavation(25.2 MPa for k = 1; 52.7 MPa for k = 2)is lower than the magnitude obtained for circular hole(26.4 MPa for k = 1; 59.5 MPa for k = 2).Therefore, we have concluded that the horse shoe shape offers the best stability and the best design for engineer. The anisotropy system presented by rock mass can also influence the redistribution of stresses around hole opened. Numerical results have revealed that the magnitude of redistribution of horizontal stresses obtained for transverse isotropic rock(12.1 MPa for k = 0.5; 25.2 MPa for k = 1 and52.7 MPa for k = 2) is less than those obtained in the case of isotropic rock(27.6 MPa for k = 1;48.6 MPa for k = 2 and 90.81 MPa for k = 2). The more the rock has the anisotropic behavior, the more the mass of rock around the tunnel is stable.展开更多
近来,white shoe 频频出现在报纸杂志上。The New York Times在描述一位在一家有声望的律师事务所工作的律师时这样写道:“She isa lawyer in a‘white shoe’firm”。在最近的The American Lawyer上一位不愿透露姓名的新会员也是这样...近来,white shoe 频频出现在报纸杂志上。The New York Times在描述一位在一家有声望的律师事务所工作的律师时这样写道:“She isa lawyer in a‘white shoe’firm”。在最近的The American Lawyer上一位不愿透露姓名的新会员也是这样描述芝加哥的一家律师事务所Kirkland & Ellipse 的:“hip people of the’90s...have shed the old stuffy‘white shoe’law firm attitude for an open。展开更多
In order to celebrate Chongqing as a directly governed city region for ten years and also the First China Chongqing Cultural Artistic Festival, Chongqing Acrobatic Artistic Troupe gave a large acrobatic play of fairy ...In order to celebrate Chongqing as a directly governed city region for ten years and also the First China Chongqing Cultural Artistic Festival, Chongqing Acrobatic Artistic Troupe gave a large acrobatic play of fairy story Red Dancing Shoes. From June 1st to June 3rd, the performance in public of Red Dancing Shoes got a complete success. The media including Chongqing TV Station,展开更多
The basic principle that shoes would indicate its maximum value only when they are worn by people is exactly what people constantly ignore.How to find out the recipe toones own color matching?The key answer would be&q...The basic principle that shoes would indicate its maximum value only when they are worn by people is exactly what people constantly ignore.How to find out the recipe toones own color matching?The key answer would be"people oriented".展开更多
As data presentation,in October,2017,the total retail sales of consumer goods reaches RMB3424.1 billion,a year-on-year increase of 10%.Thereinto,the consumer goods turnover of the above norm units is RMB 1437.4 billio...As data presentation,in October,2017,the total retail sales of consumer goods reaches RMB3424.1 billion,a year-on-year increase of 10%.Thereinto,the consumer goods turnover of the above norm units is RMB 1437.4 billion with an increase of 7.2%.From January to October in 2017,the total retail sales of social consumer goods reaches RMB 29741.9billion,展开更多
文摘In this paper numerical analysis of underground structures, taking account the transverse isotropy system of rocks, was done using CAST 3M code by varying the shape of excavation and the coefficient of earth pressure k. Numerical results reveal that the anisotropy behavior, the shape of hole and the coefficient of earth pressure k have significant influence to the mining induced stress field and rock deformations which directly control the stability of underground excavation design. The magnitude of horizontal stress obtained for the horse shoe shape excavation(25.2 MPa for k = 1; 52.7 MPa for k = 2)is lower than the magnitude obtained for circular hole(26.4 MPa for k = 1; 59.5 MPa for k = 2).Therefore, we have concluded that the horse shoe shape offers the best stability and the best design for engineer. The anisotropy system presented by rock mass can also influence the redistribution of stresses around hole opened. Numerical results have revealed that the magnitude of redistribution of horizontal stresses obtained for transverse isotropic rock(12.1 MPa for k = 0.5; 25.2 MPa for k = 1 and52.7 MPa for k = 2) is less than those obtained in the case of isotropic rock(27.6 MPa for k = 1;48.6 MPa for k = 2 and 90.81 MPa for k = 2). The more the rock has the anisotropic behavior, the more the mass of rock around the tunnel is stable.
文摘近来,white shoe 频频出现在报纸杂志上。The New York Times在描述一位在一家有声望的律师事务所工作的律师时这样写道:“She isa lawyer in a‘white shoe’firm”。在最近的The American Lawyer上一位不愿透露姓名的新会员也是这样描述芝加哥的一家律师事务所Kirkland & Ellipse 的:“hip people of the’90s...have shed the old stuffy‘white shoe’law firm attitude for an open。
文摘In order to celebrate Chongqing as a directly governed city region for ten years and also the First China Chongqing Cultural Artistic Festival, Chongqing Acrobatic Artistic Troupe gave a large acrobatic play of fairy story Red Dancing Shoes. From June 1st to June 3rd, the performance in public of Red Dancing Shoes got a complete success. The media including Chongqing TV Station,
文摘The basic principle that shoes would indicate its maximum value only when they are worn by people is exactly what people constantly ignore.How to find out the recipe toones own color matching?The key answer would be"people oriented".
文摘As data presentation,in October,2017,the total retail sales of consumer goods reaches RMB3424.1 billion,a year-on-year increase of 10%.Thereinto,the consumer goods turnover of the above norm units is RMB 1437.4 billion with an increase of 7.2%.From January to October in 2017,the total retail sales of social consumer goods reaches RMB 29741.9billion,
