Study On The Pressure Control Of Y485 Working Surface In Tangshan Mine

With the continuous deepening of the depth of coal mining,rock burst phenomenon is also increasing,seriously restricting the coal mine safety and high efficiency mining.Because of extremely complex mechanism and many factors affected,disasters and sudden and unpredictable,rock burst phenomenon become an important research topic in mining mechanics.Since 1964 the first burst of Tangshan coal mine happened.Now 81 times burst brings a major threat to the safety of Tangshan coal mine.Therefore,this thesis has studied burst in the hazardous area classification,monitoring and control of rock burst based on Tangshan mine Y485.Based on the study of Y485 working face of geological conditions and mining environment,10 influencing factors of rock burst in Y485 working face are determined,and risk of working face area is divided.This paper analyzes and divides 26 dangerous areas in the Y485 working face area,such as roadway,roadway driving and working face mining.The borehole stress meter stress monitoring,and monitoring the magnetic radiometer and the drilling method monitoring of risk to the working face,implementation of rock burst prevention measures to determine the time.By getting rid of danger from the security region to gradually enter the danger zone,while monitoring and controlling,after get tested for the principle,this research put forward in the weak danger zones and moderate risk area by drilling pressure relief or blasting measures for pressure relief treatment.Danger zones using deep-hole strong measures for high energy set of segmented blasting and pressure releasing,this monitoring and control of rock burst achieves a good result.The research achievements of Tangshan mine rock burst prevention and treatment play an important role in guiding,providing technical support for the efficient exploitation of coal mine safety,and providing a valuable field practice foundation for the research of mining mechanics.