Practical Study on 8300-1 Working Face Passing through Fault in Zengzifang Coal Mine
Taking 8300-1 working face of Shanxi Zengzifang Coal mine as the research object,F7 fault was exposed during the mining process.The influence range of this fault is about 60 m,and the maximum width is 35 m,which caused the intrusion of very hard fine and medium grained sandstone into the rock stratum,which has a great impact on the mining equipment and the mining speed of the working face.Therefore,in order to ensure the smooth progress of the working face,it is decided to adopt the loose blasting method to weaken the rock stratum strength according to the actual situation on site.Through principle analysis and ANSYS software simulation,the blasting para meters and the layout of blasting holes are deter mined.Finally,the practice shows fthat 8300-1 working face successfully passes through the fault,effectively reduces the loss of shearer,improves the coal utilization and recovery rate,and provides a reference for simmilar situations in the mine.
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