内蒙古煤矿采空区地面塌陷类型及影响因素研究

Study on subsidence types and their influence factors of coal mine goaf in Inner Mongolia

近年来,内蒙古发生了大量地面塌陷事故,给人们的生产生活带来巨大的危害和损失。而因煤炭开采造成的采空区塌陷占全区总塌陷面积的99%。通过近几年的现场调查和统计,明确了内蒙古主要煤矿采空区地面塌陷的分布范围和面积,总结了煤矿采空区地面塌陷的类型(即下沉盆地、裂缝、塌陷坑),分析了矿区工程地质条件、开采方法及顶板管理方式对采空区塌陷的发育程度和发育类型的影响。相关研究成果可为内蒙古煤矿采空区塌陷的科学防治提供依据。

In recent years,there have been a lot of surface subsidence accidents in Inner Mongolia,which have brought enormous harms and great damages on people＇s life and production and become the focus of people＇s concern. However,in Inner Mongolia,the subsidence area of the coal mine goaf accounted for99% of the total subsidence area. Through the field investigation and statistics,the distribution range and area of the goaf surface subsidence in the main coal mining area of Inner Mongolia are defined,and the types of the goaf surface subsidence are summarized（ i. e.,the subsidence basin,the fissure and the collapse pit）. The influence factors of the engineering geological conditions of the mining area,mining method,roof management pattern on the subsidence extent and type are analyzed. The related research results could provide the basis for the scientific prevention and control of the surface subsidence in the coal mine goaf of Inner Mongolia.