Artificially ground freezing (AGF) is one of the main methods to establish temporary support for shaft sinking in unstable water bearing strata. Domde (1915) formula based on frozen soil strength has widely been used ...Artificially ground freezing (AGF) is one of the main methods to establish temporary support for shaft sinking in unstable water bearing strata. Domde (1915) formula based on frozen soil strength has widely been used for designing freezing wall thickness. However, it can not ensure the stability of freezing wall, nor guarantee the safety of shaft construction as frozen depth increases in unstable water bearing strata. F A. Auld (1985, 1988)[1,2] presented a design method of freezing wall, which is on the basis of strength and stability, together with deformation of freezing wall. This paper, according to the practice in China, describes a "time -space" related design method for deep freezing wall. The method is based on "time-space" concept, which includes influence of excavation rate of advance, unsupported length of freezing wall and the sump state on inward deformation of freezing wall, and the allowable pipe deformation caused by inward deformation of freezing wall. Finally, successful application of this method to the large scale coal mine-Jining No. 2 Mine[3] in Shandong Province of China is presented. It saved much investment compared with F. A. Auld’s design for the same mine.展开更多
The aim of this paper is to investigate the integrated welfare and disclosure by proposing emerging issues in the contemporary scenario. Thus, company welfare is represented as internal sociability; environmental prot...The aim of this paper is to investigate the integrated welfare and disclosure by proposing emerging issues in the contemporary scenario. Thus, company welfare is represented as internal sociability; environmental protection or innovation can be interpreted as external sociability, representing the uses of resources that a company does not incur costs, but demonstrates its health and social responsibility. Following a theoretical approach, the paper proposes as result a conceptual study introducing an updated literature analysis on the topic proposed of the integrated welfare systems and disclosure trying to point out emerging issues through a case study. Moreover, the research methodology is based on a qualitative approach and secondary sources in order to propose not only to scientific community a literature analysis. In this way, the implications of the research can be directed to academic communities and policy makers. The research question is the following： Which are emerging issues on the integrated welfare and its disclosure？展开更多
文摘Artificially ground freezing (AGF) is one of the main methods to establish temporary support for shaft sinking in unstable water bearing strata. Domde (1915) formula based on frozen soil strength has widely been used for designing freezing wall thickness. However, it can not ensure the stability of freezing wall, nor guarantee the safety of shaft construction as frozen depth increases in unstable water bearing strata. F A. Auld (1985, 1988)[1,2] presented a design method of freezing wall, which is on the basis of strength and stability, together with deformation of freezing wall. This paper, according to the practice in China, describes a "time -space" related design method for deep freezing wall. The method is based on "time-space" concept, which includes influence of excavation rate of advance, unsupported length of freezing wall and the sump state on inward deformation of freezing wall, and the allowable pipe deformation caused by inward deformation of freezing wall. Finally, successful application of this method to the large scale coal mine-Jining No. 2 Mine[3] in Shandong Province of China is presented. It saved much investment compared with F. A. Auld’s design for the same mine.
文摘The aim of this paper is to investigate the integrated welfare and disclosure by proposing emerging issues in the contemporary scenario. Thus, company welfare is represented as internal sociability; environmental protection or innovation can be interpreted as external sociability, representing the uses of resources that a company does not incur costs, but demonstrates its health and social responsibility. Following a theoretical approach, the paper proposes as result a conceptual study introducing an updated literature analysis on the topic proposed of the integrated welfare systems and disclosure trying to point out emerging issues through a case study. Moreover, the research methodology is based on a qualitative approach and secondary sources in order to propose not only to scientific community a literature analysis. In this way, the implications of the research can be directed to academic communities and policy makers. The research question is the following： Which are emerging issues on the integrated welfare and its disclosure？
