Application and Development Trend of Grouting Technology in Prevention and Control of Ordovician Limestone Water Disaster in North China Type Coalfields

Abstract

Abstract The hydrogeological conditions of North China type coalfields are complex. With the large-scale development of deep resources, the probability of Ordovician limestone water inrush from coal seam floor increases. Ordovician limestone water disaster has become a serious safety threat to deep mining in North China type coalfields. Since the application of grouting technology can quickly block the water inrush passage and eliminate potential floods, it has obvious advantages in the prevention and control of Ordovician limestone water disasters in North China type coalfields. Equipment progresses, such as working face grouting, downhole directional drilling grouting and surface directional drilling grouting, promote the sustainable development of grouting technology for prevention and control of Ordovician limestone water disaster in North China type coalfields. This paper analyzed the development process of grouting technology in the prevention and control of Ordovician limestone water disaster in North China type coalfields, analyzed the problems encountered for surface directional drilling grouting in practice based on advanced Ordovician limestone water disaster treatment project cases, and pointed out the development direction of surface directional drilling grouting technology for regional water disaster prevention and control. This paper is of important reference significance for prevention and control of Ordovician limestone water disaster in deep mining floor of North China type coalfields.