The traditional methods of surface movement and deformation prediction seldom take account of the effects of small structures. However, because of the effects of small structures, the buildings located at the bottom o...The traditional methods of surface movement and deformation prediction seldom take account of the effects of small structures. However, because of the effects of small structures, the buildings located at the bottom of subsidence trough for full-extraction can not be protected by the flat bottom, but destroyed severely by concentrated strains in the fault-half-trough. Under this coudition, if tbere is an important building at the bottom of subsidence trough, it is significant to accurately determinate the directions and values of concentrated strains and the location of concentrated strain zone. The mechanical method can calculate the maximum principal strain, including bi-directional horizontal deformation, shearing strain and their directions, which are necessary to reinforce the buildings. The mechanical method has more advantages than the method of scalar quantity horizontal deformation. This paper dwells on the effects of small structures on surface movement and deformation using the mechanical method in Pingdingshan mining area.展开更多
文摘The traditional methods of surface movement and deformation prediction seldom take account of the effects of small structures. However, because of the effects of small structures, the buildings located at the bottom of subsidence trough for full-extraction can not be protected by the flat bottom, but destroyed severely by concentrated strains in the fault-half-trough. Under this coudition, if tbere is an important building at the bottom of subsidence trough, it is significant to accurately determinate the directions and values of concentrated strains and the location of concentrated strain zone. The mechanical method can calculate the maximum principal strain, including bi-directional horizontal deformation, shearing strain and their directions, which are necessary to reinforce the buildings. The mechanical method has more advantages than the method of scalar quantity horizontal deformation. This paper dwells on the effects of small structures on surface movement and deformation using the mechanical method in Pingdingshan mining area.
