标题：Surface movement characteristics and control under the influence of highstand thick-hard strata
作者：Guo, Weijia ;Li, Yangyang ;Zhang, Shichuan ;Lu, Chang ;Zhao, Jinhai
作者机构：[Guo, Weijia ;Li, Yangyang ;Zhang, Shichuan ;Lu, Chang ;Zhao, Jinhai ] State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Sh 更多
来源：Electronic Journal of Geotechnical Engineering
摘要：In order to reduce the non-continuous deformation and damage of the surface under highstand thick-hard strata mining and realize safety mining under buildings, technical measures high-grouting in bed-separations in overburden under high stand thick-hard strata to control surface subsidence is proposed. Theoretical analysis, mechanical simulation and field measurement were used to research the characteristics of surface movement and the rupture law of high stand thick-hard strata, and based on these make a analysis of the effect of high-grouting on high stand thick-hard strata. The results showed that: giant thickness conglomerate and hypostasis strata formed a "rigid upper and soft lower" combination mode, which provided favorable conditions for the production of bed separation; broken crack of giant thickness conglomerate is visually displayed on the surface because of the thin topsoil layer; abscission layer was sufficiently developed and keep stable in a certain range which provided necessary conditions for the smooth conduct of the bed separation grouting. High pressure grouting scheme was designed according to the results' analysis. After grouting the surface subsidence rate and sinkage were slowed down the influence scope was significantly decreased, the village houses were less damage and there is no obvious crack on the surface. © 2014 ejge.