Research On Prevention Technology And Condition Of Rock Burst Occurred In Jining No.3 Coal Mine

Jining No 3 Yanzhou Mining Group as the main mine,with coal mining depth increased,the number of occurrences of rock burst also increase year by year,and the degree of risk of disasters become increasingly serious,it has been a serious threat to the safety of underground production.Rock burst accidents in the event,while the impact of mine operations,but also endanger the safety of production equipment and workers.Statistical analysis over the years,Jining No 3 rock brust during excavation in coal seams occur in the characteristics and occurrence and control design for the main coal seam 3down provides guidance advice.Through research of coal resources exploration drilling data,Well construction period to develop mining geological formations reveal actual situation,and mechanical properties of coal and rock mining actual experimental identification and other information uncovered.The impact and influence of geological structure tendentious analysis of the main coal seam rockburst occurrence of rock burst prediction and prevention and treatment guidance.According to the main coal seam roadway arrangement,mining methods,the use of microseismic monitoring,secondary stress observation techniques,analysis of the existing mining conditions,the impact of possible pressure to dangerous area,Face scour for determining the scope and focus ahead prevention regions have reference value.While the use of bumping prevention and control theory for 3 coal seam mining currently scour evaluation design,layout and development of mining programs provide theoretical guidance for future roadway.Based Jining 3 coal seam roof and floor of the main properties of geological structure condition,the coal seam properties and other characteristics,Using hierarchical rockburst hazard area prediction mode:Firstly,rockburst danger zones management expert system Jining No 3 Main Coal Seam overall impact of the danger zone is divided;Secondly,danger zone and threaten the existence of the impact area and may be in danger in the current conditions of mining design Face,using microseismic monitoring system,real-time online monitoring system stress,the impact of mining face dangerous conduct regional monitoring,using elastic wave CT technology of the former mining face hazardous area forecast;Thirdly,drill cuttings index method and electromagnetic radiation Comprehensive determination whether the impact of the danger zone have occurred rockburst possible.Finally,Face Cut Roof Presplit relief measures such as getting rid of danger of shock hazard area.