Evolution mechanism and treatment timing of penetrating fissures  

作　　者：ZHANG Yanjun YAN Yueguan ZHU Yuanhao DAI Huayang 

机构地区：[1]College of Geoscience and Surveying Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China

出　　处：《Journal of Mountain Science》2024年第10期3453-3473,共21页山地科学学报（英文）

基　　金：supported by the Major Program of the National Natural Science Foundation of China(No.52394191);the Fundamental Research Funds for China University of Mining and Technology(Beijing):Doctoral Top-notch Innovative Talents Cultivation Fund(No.BBJ2023018,BBJ2023023);the Open Fund of State Key Laboratory of Water Resource Protection and Utilization in Coal Mining(No.GJNY-20-113-20).

摘　　要：The Inner Mongolia mining area in western China are characterized by the development of numerous penetrating fissures,resulting in severe land damage.It is significant to reveal the underlying evolution mechanism and identify treatment timing for restoring the ecological environment.The Guanbanwusu mining subsidence area in Inner Mongolia,China was selected as the research case for this study.The evolution mechanism of different penetrating fissures was revealed by field measurement,physical simulation and theoretical analysis.The treatment timing prediction model for the mining subsidence area was established based on the enhanced Weibull time function.The results show that the ground fissures are mainly step-type and collapse-type fissures.The breaking form of overlying strata determines their vertical opening and horizontal dislocation.The high mining intensity in the western mining area results in a shortened period of dynamic fissure expansion and reduced closure degree.The damage extent of the overlying strata exhibits zoning characteristics both vertically and horizontally.The relative standard deviation of the prediction model is only 3.7%.Concurrently,the prediction model is employed to determine the optimal timing for treatment in the study area,estimated to be 259 days.Subsequently,once this threshold is reached,the study area undergoes treatment and restoration of its e cological environment.This study addresses the knowledge gap in this field by highlighting the interconnectedness between rock strata structure and evolution mechanism of penetrating fissures,thereby providing a method for determining the treatment timing in mining subsidence areas.

关 键 词：Mining subsidence Ecological restoration FISSURES Evolution mechanism Prediction model Treatment timing 

分 类 号：X171.4[环境科学与工程—环境科学] TD327[矿业工程—矿井建设]