Research on Types and Treatment Methods of Ground Collapse of Mining Area in Inner Mongolia

The Inner Mongolia Autonomous Region is a province with large mineral resources in China. While ensuring the needs of national economic development and economic benefits, it has caused many geological and environmental problems at the cost of damage to the geological environment of mines. The problem of ground collapse shows an upward trend in various types of well mining mines, especially in coal mines. Based on the investigation of 15 typical mining areas in the East, middle and west of Inner Mongolia Autonomous Region, this paper analyzes the formation, scale, basic types and development laws of ground collapse, and discusses the engineering management modes of mine ground collapse for different types of mines by combining with the investigation of controlled collapse cases in Inner Mongolia Autonomous Region. The main types of mine ground collapse are subsidence basin, bench collapse, ground fissure, collapse pit and collapse trough. In view of these five types of ground collapse, the paper summarizes and analyzes the targeted engineering treatment methods, including surface backfill technology, goaf filling technology, grouting reinforcement technology, aquifer (water barrier) repair technology and surface landform recovery treatment technology. Through in-depth research on the governance objects, governance objectives and key technical, the rudiment of governance mode is constructed. In combination with the actual governance cases in the autonomous region, the applicability of governance mode is discussed, and the governance mode of mine ground collapse engineering in Inner Mongolia is formed.