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Surface movement and deformation characteristics due to high- intensive coal mining in the windy and sandy region

International Journal of Coal Science & Technology 2016年第3期3卷 339-348页

作者： Zhenqi Hu Chao Chen Wu Xiao Xinjing Wang Mingjie Gao Institute of Land Reclamation and Ecological Restoration China University of Mining and Technology (Beijing)Beijing China College of Resource and Environment North ChinaU niversity of Water and Electric Power Zhengzhou China

As China＇s energy strategy moving westward, the surface movement and deformation characteristics due to high-intensive coal mining in the windy and sandy region become a research hotspot. Surface movement observation stations were established to monitor movement and deformation in one super-large working face. Based on field measurements, the surface movement and deformation characteristics were obtained, including angle parameters, subsidence prediction parameters, etc. Besides, the angle and subsidence prediction parameters in similar mining areas are summarized; the mechanism of surface movement and deformation was analyzed with the combination of key stratum theory, mining and geological conditions. The research also indicates that compared with conventional working faces, uniform subsidence area of the subsidence trough in the windy and sandy region is larger, the trough margins are relative steep and deformation values present convergence at the margins, the extent of the trough shrink towards the goaf and the influence time of mining activities lasts shorter; the overlying rock movement and breaking characteristics presents regional particularity in the study area, while the single key stratum, thin bedrock and thick sand that can rapidly propagate movement and deformation are the deep factors, contributing to it.

关键词： windy and sandy region High-intensive mining Surface movement and deformation Key stratum

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