Complex Fault Zone Of Overlying Rock Destruction Rule And Water Inrush Disaster Prediction Research

The water inrush problem in special thick seam mining under complex engineering geological conditions, belongs to the worldwide problem. The paper take LaoHuTai mine as an example, studied the complex fault zone, the overlying rock mass damage rule of special thick coal seam fully mechanized mining, and the evolution law of water flowing fractured zone height, obtained results as follows:(1) The overlying rock mass have been destroyed repetition by effect of multiple working face compound disturbance, there are large area collapse on the surface and a lot of water in the low-lying place, the cause potential safety problems for future mining. In view of the position relations of fault and underground mining area, simulateing the influence of the different excavated volume to overlying rock and fault, and then reveals the law of water inrush by fault activation and movement of the surface subsidence basin.(2) Through engineering geophysical prospecting and the damage rule of overlying rock, determined the influence law of excavated volume to water flowing fractured zone height.(3) In this paper, BP-neural network and the analysis of seepage field are used to study the roof water inrush. According to the observation of saturation and vector graph, we can judge water inrush.(4) According to Laohutai coal mine specific hydrogeological conditions, adjust corresponding measures to prevent water inrush. Surface water controls mainly take measures of improving geological exploration system, paving the river bed etc. underground mainly adopts the building drainage system, water pressure, coal pillar etc. Through the combination measure, achieve the purpose of water prevention.