Study On The Development Characteristics Of The Separation Layer And The Formation Mechanism Of Water Damage In The Second North Mining Area Of Guqiao Mine

In the process of coal mining,coal mine is always faced with various safety problems.Among them,separated layer water disaster,as a new type of mine water disaster,the water inrush omen is unknown,the instantaneous water inrush is large,and the water inrush is very harmful,which always threatens the safety of mine production,so people attach great importance to it.In order to protect the coal mine from the economic loss and safety problems caused by the water disaster,it is necessary to conduct in-depth study on the spatial development characteristics and the formation mechanism of water disaster in the coal mining process.The overburden of No.11-2 and No.13-1 coal mining areas in the second mining area of Guqiao Mine is selected as the research object.The key layer theory and FLAC3D numerical simulation are used to analyze and study the overburden failure law in the process of coal mining and determine the height of water conducting fracture zone after coal mining;Based on the geological conditions of 11-2 and 13-1 coal overburden,using RFPA numerical simulation software,a calculation model is established to directly reflect the development of the separation space outside the water conducting fracture zone after the mining overburden is damaged;Based on the water source and supply conditions around the separation space,the water filling and development of separation water are analyzed;Based on the formation factors of separated layer water disaster,the risk assessment system of separated layer water disaster is established and applied to the second mining area in the north of Guqiao Mine to evaluate the risk of separated layer water disaster.Figure 40 table 20 reference 101...