Study And Application Of Water Disaster Prevention Technology In 19110 Working Face Of Jinggong No.1 Coal Mine

Combined with the geological structure distribution and hydrogeological conditions of Jinggong No.1 Mine,this paper takes the 19110 working face of No.9coal seam as the research object.The hydrogeological condition exploration and analysis of the working face under the influence of concealed structure,the risk evaluation of floor water inrush,the design of floor grouting reconstruction scheme and the implementation of the project have been carried out to ensure the safety of the working face mining.The main research results of this paper are as follows:In this paper,the design of 19110 working face of geophysical prospecting,drilling exploration,drilling and obtain in 19110 working face revealed on the basis of the hydrological geological data and geophysical exploration results,the study of the working face no.9 coal seam floor wealthy scope of water,and water depth,the distribution of aquifer and water-resisting layer and concealed structure characteristics,development characteristics,on the basis of conducting 19110 working face floor water abundance evaluation of the Ordovician limestone aquifer.Combined with the above exploration results,water pressure and water quality observation data of working face and drilling data of Jinggong No.1 Mine,the thickness of floor waterproof layer of working face 19110,the water pressure of Ordovician limestone and the determination of water inrush risk area were calculated,and the water inrush risk assessment of working face 19110 was conducted.In view of the large amount of water in the Ordovician limestone aquifer and the relatively developed hidden structure in the 19110 working face of Jinggong No.1Mine,the grouting scheme is designed to block the water channel in the water-rich area threatened by water inrush.Finally,water quantity observation,water quality analysis comparison,verification hole exploration,transient electromagnetic exploration and other methods are used to test the treatment effect of the scheme.The verification results show that the "sealing and blocking" has been formed,and the water sealing effect is good,which can meet the requirements of mining with pressure.There are 51 figures,27 tables and 64 references in this paper.