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
The paper presents some possibilities of improvement in the subsidence trough description in relation to the description provided by influence function methods. These possibilities rely in a new approach to the values...The paper presents some possibilities of improvement in the subsidence trough description in relation to the description provided by influence function methods. These possibilities rely in a new approach to the values of theory parameters. Instead of one value of a certain theory parameter it is assumed that it can vary within an interval (in particular infinite one) and each value within that interval is given a weight. Thus we receive a distribution of the values of the parameter considered analogical to the probability distribution of a random variable.展开更多
The load of the continental ice caps of the Ice Ages deformed the bedrock, and when the ice melted in postglacial time, land rose. This process is known as glacial isostasy. The deformations are compensated either reg...The load of the continental ice caps of the Ice Ages deformed the bedrock, and when the ice melted in postglacial time, land rose. This process is known as glacial isostasy. The deformations are compensated either regionally or globally. Fennoscandian data indicate a regional compensation. Global sea level data support a regional, not global, compensation. Subtracting GIA corrections from satellite altimetry records brings—for the first time—different sea level indications into harmony of a present mean global sea level rise of 0.0 to 1.0 mm/yr.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.
文摘The paper presents some possibilities of improvement in the subsidence trough description in relation to the description provided by influence function methods. These possibilities rely in a new approach to the values of theory parameters. Instead of one value of a certain theory parameter it is assumed that it can vary within an interval (in particular infinite one) and each value within that interval is given a weight. Thus we receive a distribution of the values of the parameter considered analogical to the probability distribution of a random variable.
文摘The load of the continental ice caps of the Ice Ages deformed the bedrock, and when the ice melted in postglacial time, land rose. This process is known as glacial isostasy. The deformations are compensated either regionally or globally. Fennoscandian data indicate a regional compensation. Global sea level data support a regional, not global, compensation. Subtracting GIA corrections from satellite altimetry records brings—for the first time—different sea level indications into harmony of a present mean global sea level rise of 0.0 to 1.0 mm/yr.
