Research on reserved width of coal pillar in sections based on multi-hazard factors
Taking the No.1105 working face of a certain coal mine as the research object,the reasonable reserved size of coal pillars in the No.1105 working face section under the conditions of the mine's rock burst,high gas,coal seam spontaneous combustion,and water disaster coexisting conditions were studied.Using engineering analogy,theoretical calculations and finite element numerical simulation and other analysis methods,combining geological and mining technology factors of the mine,the feasibility of using energy-absorbing and anti-shock support technology to reserved small coal pillars and the size of the reserved coal pillars analysis.The results show that re-served small coal pillars with a width of 10 m in the working face can transfer the lateral supporting pressure concentration area of the working face to the solid coal supporting area,reducing the risk of coal pillar impact,and the width of the coal pillars can meet the re-quirements of water-proof and fire-proofing in the goaf.
rock burstmulti-hazard couplingyield coal pillarnumerical simulationbearing pressure
万方数据
维普
