With the development of science and technology information, China's construction industry has been further optimized, and many new technologies have been applied in the construction industry, which has played a go...With the development of science and technology information, China's construction industry has been further optimized, and many new technologies have been applied in the construction industry, which has played a good effect in improving the quality of construction projects. As a common technology in housing construction and civil engineering, high formwork technology has good use value. In specific applications, as a common support system, it has high stability, but at the same time, there are also high risks and difficulties in construction, and it is difficult to install and remove. Therefore, we should carefully explore the application points of high formwork construction technology, and strengthen the control of construction process, ensure the quality and safety of housing construction and civil engineering, and ensure the safety of life and property of construction personnel.展开更多
In order to determine the rational width of backfill in the goaf-side retained roadway, the deformation failure mechanism of surrounding rock in retained roadway is studied in the use of theoretical analysis, numerica...In order to determine the rational width of backfill in the goaf-side retained roadway, the deformation failure mechanism of surrounding rock in retained roadway is studied in the use of theoretical analysis, numerical simulation, etc., when the width of backfill is different. The results show that: with the increase of backfill width, the roof deformation above the backfill decreases; the outside of backfill obviously suffers from greater stress compared to the inner side of backfill; the damage firstly appears in the intersection of top backfill and roof; the plastic failure area is mainly distributed in the roof and floor of inside the roadway; 2 m wide backfill in the goaf-side retained roadway can meet the requirements of roadway deformation. Based on the original combination support of "anchor-mesh-belt-lock" in the haulage-track roadway, the study also considers the reinforced support of "anchor-mesh-belt" above the backfill, and 50 m ahead of working face, and 200 m behind the working face. This kind of support achieves a good result. The roadway deformation of field measurement shows that it can satisfy the need of the next working face.展开更多
文摘With the development of science and technology information, China's construction industry has been further optimized, and many new technologies have been applied in the construction industry, which has played a good effect in improving the quality of construction projects. As a common technology in housing construction and civil engineering, high formwork technology has good use value. In specific applications, as a common support system, it has high stability, but at the same time, there are also high risks and difficulties in construction, and it is difficult to install and remove. Therefore, we should carefully explore the application points of high formwork construction technology, and strengthen the control of construction process, ensure the quality and safety of housing construction and civil engineering, and ensure the safety of life and property of construction personnel.
基金Financial support for this work was provided by Chinese National 863 High Technology Plan (No. 2012AA062101)the Priority Academic Program Development of Jiangsu Higher Education Institutions (No. SZBF2011-6-B35)the Graduate Students Innovation Fund of Colleges and Universities in Jiangsu Province (No.CXZZ12_0950)
文摘In order to determine the rational width of backfill in the goaf-side retained roadway, the deformation failure mechanism of surrounding rock in retained roadway is studied in the use of theoretical analysis, numerical simulation, etc., when the width of backfill is different. The results show that: with the increase of backfill width, the roof deformation above the backfill decreases; the outside of backfill obviously suffers from greater stress compared to the inner side of backfill; the damage firstly appears in the intersection of top backfill and roof; the plastic failure area is mainly distributed in the roof and floor of inside the roadway; 2 m wide backfill in the goaf-side retained roadway can meet the requirements of roadway deformation. Based on the original combination support of "anchor-mesh-belt-lock" in the haulage-track roadway, the study also considers the reinforced support of "anchor-mesh-belt" above the backfill, and 50 m ahead of working face, and 200 m behind the working face. This kind of support achieves a good result. The roadway deformation of field measurement shows that it can satisfy the need of the next working face.
