Analysis Of Main Controlling Factors Of Mine Roadway Impact In One Panel Of Gaojiapu Coal Mine And Its Control Countermeasures

In recent years,the frequency of rock burst disasters in coal mines in northwest China has increased dramatically,which poses a threat to safe production.Based on the background of a plate area of Gaojiapu coal mine in Zhengtong Coal Industry in Binchang,Shaanxi Province,this paper analyzes the influence law of horizontal stress,physical and mechanical parameters on the impact of coal mine damage,and studies the main control factors of the impact of a large mine roadway in Gaojiapu.Gaojiapu Coal Mine is located in the northwest of the Binchang Mine,east to the vicinity of the Yadian exploration area,west to the border of Shaanxi and Gansu Province,south to Yangjiaping Coal Mine and Mengcun Minefield,and north to Jinghe,Minefield The total area is about 219.168km~2.One of the panels is located in the north direction of the west wing of the mine.The east-west length of the panel is about 4.0km,the width in the north-south direction is about 3.0km,and the area is about 12km~2.The burial depth of the coal seam in the Gaojiapu Coal Mine is about 1000m.The large burial depth makes the coal and rock masses near the coal seam have a high stress level.The impact of the pressure appears to be more intense and complex.Interference with slight dynamic loads can produce very high loads.That is to say,in this case,small shocks in the vicinity or large mine shocks in the distance can induce shocks.Statistical analysis is made on the characteristics of strong mine tremors and shocks occurring in a roadway during excavation and mining.When only one working face is mined,there are fewer microseismic events;when the mining of four working faces,such as 101,103,102 and 201,201,the number of microseismic events in the Daxiang area increases significantly.The numerical simulation studies the relationship between the displacement and stress of coal and rock bodies near the roadway under different mining degrees.According to the numerical simulation results and the theoretical analysis,it can be seen that the roadway in the district of Gaojiapu Coal Mine has a large burial depth and a thick coal seam.Its static load conditions are extremely close to the minimum impact load,plus a certain dynamic load disturbance,It is particularly easy to destroy its limit equilibrium state,it is easy to induce shock hazard.At the same time,it analyzes the impact of various factors on the impact of the roadway in different situations,and determines the main control factors of the impact of the first roadway in the Gaojiapu Coal Mine.The first roadway is the coal roadway,and its stability is poor.High burial depth,under high static load conditions,low disturbance can cause mine earthquake activity.According to the research results,the corresponding countermeasures were put forward,and the prevention and control plan of a large roadway in Gaojiapu Coal Mine was determined,which was monitored by drilling cutting method,support resistance observation method and micro-seismic positioning method.The roadway roof blasting method and coal body were adopted.Pressure relief blasting method and floor blasting method are used for pressure relief to ensure the stability of the roadway and achieve good results.The research results of this paper can provide a certain reference for the prevention and treatment of rock burst in similar engineering geological conditions.The paper has 46 pictures,17 tables,and 90 references.