Research On Mine Earthquake Monitoring And Gas Early Warning In Hegang Area

This paper aims to reveal the relationship between coal and rock vibration,overlying strata movement,mining power and tectonic stress field,etc.,in order to reveal natural earthquakes in the concrete working face of Hegang mine area and mine.Inducing mechanism and activity law of strong mine and gas spillage.Based on this,it explores hazard warning criteria and techniques for the impact of mine shocks and other dynamic disasters on specific working surfaces in mining areas and mines.After nearly one hundred years of mining history,the Hegang Coal Mine has a mining depth of nearly 1,000 meters and is a mine with high gas and strong mines.The seismic geological structure of Hegang is complex,and its stress field is influenced by the plate tectonic movement of the large background and is also affected by local stress and strain such as mining.There is a background of the occurrence of moderate-strong earthquakes in this area.Mine seismic monitoring stations that have been established in the Hegang area have also begun to function.In recent years,the mining industry in Hegang has invested in high-precision microseismic monitoring systems and high-sampling gas detection systems.In combination with the observations above,Study on the mechanism of earthquake generation in the Hegang mine and find out the internal relationship between it and the natural earthquakes in the relevant structural areas.Simultaneously,there is a close relationship between mine shock and gas spillage in the mine,etc.In the existing observation examples,the internal correlation is found.Natural earthquakes in the near-field and interrelated structural regions have significant triggering or triggering effects on the mine shock.Within one week after natural earthquakes,the frequency and magnitude of mine seismic activity will obviously increase.This shows that natural earthquakes have exacerbated the stress accumulation in the mining area and will be significantly released in the mined-out areas and critical areas of stress.After the occurrence of the mine shock,the gas activity in the local mine has obvious first-to-low-high features,but even in mines that are far away,even if there is a large-scale mine shock,It may not necessarily be accompanied by gas spills.Use Bayes’ law to find out the internal correlation in observational examples.Research shows that it is feasible to provide reliable early warning for mine safety production after earthquakes in the affected area based on the large-scale mine seismic monitoring network combined with high-precision microseismic monitoring data.Establish a complete mine(micro-seismic)monitoring and early warning system for mine dynamic disasters to provide a reliable scientific basis for the development of defense,mitigation and control of power shocks and other dynamic disasters in the Hegang mining area.