Characteristics of seam roof water-conducting fracture zone in Yushen mining area
In order to detect the development characteristics and height of the water-conducting fracture zone,30201 working face in the southwest of Yushen mining area is taken as the research object,and the detection technology of water-conducting fracture zone,which combines drilling hydrology observa-tion,core geology,physical logging,direct current method and dense distributed fiber sensing,as well as numerical simulation are used to examine the development height and characteristics of the water-con-ducting fracture zone.The results show that the development height of the fracture zone in the working face is 135.00 m,the fracture/production ratio is 21.43,and the development height of the caving zone is 66.38 m;the mining ratio is 10.5,and the bending subsidence zone is 94.87 m.It is found that the inclined water-conducting fracture zone along the working face develops the smallest in the roadway and the largest in the center of the working face,and the caving zone develops the largest in the center of the working face and the smallest in the roadway.The accuracy of the numerical simulation is closely related to the parameters of the geological conditions in which the model is established,and the numeri-cal simulation is basically consistent with the field measured results.
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