The Law Of Pressure On The 6571 Working Face Under The Fault Group In The 5-950m Mining Area Of Lujiatuo

The Kailuan Lujiatuo Mine has now entered deep mining,and the-950 m 5 mining area will be the main area for exploration.There are more faults in the area and it has formed a mutually staggered fault group,which is safe for coal mine production.Brought serious problems.This paper takes multi-fault 6571 face in five mining areas as an engineering example.Through analogous material simulation tests,the distribution law of lead stress on the working face and the law of roof displacement are analyzed,which shows that there is a maximum stress point in the process of fault crossing.It further explains that the roof damage of the roadway is redistributed by the horizontal stress of the original stress field,and then redistributed to the load of the top plate and the vertical stress of the original stress field.Later,the load of the roadway is compressed by the upper plate to form a lateral direction perpendicular to the fault plane.Through the computer three-dimensional simulation technology,the distribution of the displacement and lead stress of the overburden strata on the 6571 work surface were studied.The conclusions obtained were consistent with the simulation results of similar materials.Finally,based on the similar material simulation test and the results of three-dimensional simulation technology,a set of anchor and anchor cables combined supporting scheme for the 6571 working face of the Lujiayu fault group was proposed and the type of the bracket was determined.It was proved that the support resistance of the support was tested.The feasibility of the support scheme was verified by the on-site monitoring of the displacement of the roof of the 6571 working face,verifying the simulation of similar materials and three-dimensional numerical simulations.Finally,the law of mine pressure appearance of the 6571 working face under the fault group was obtained,which is similar to Lu Jiazhen's other working face.The mining provides some guidance and reference value.