Coal Engineering ›› 2023, Vol. 55 ›› Issue (4): 113-118.doi: 10.11799/ce202304021

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Mine Pressure Features of Double-Panel-Pillar Mining in Hong-Qing-He Coal Mine

  

  • Received:2022-09-01 Revised:2022-10-10 Online:2023-04-20 Published:2023-06-05

Abstract: Due to the existence of double panel-pillar between 3-1103 working face and 3-1101 working face in Hongqinghe coal mine, the new auxiliary transportation roadway of 3-1103 working face is faced with high burst hazard, which poses a threat to safe production. Numerical simulation and statistics are carried out to investigate the mine pressure features of double panel-pillar area and the active control of burst hazard. Simulation results show that: (1) Panel-pillar area is of high stress concentration with 1# pillar and 2# pillar posing a threat to the abandoned old auxiliary roadway and the new auxiliary roadway respectively; (2) With the increase of 2# pillar, the stress in 1# pillar, 2# pillar and beside the new auxiliary transportation roadway decreases; The stress in coal mass beside the new auxiliary transportation roadway decreases faster than that beside the old auxiliary transportation roadway; (3) Seismic events induced by 3-1103 working face mainly accumulated in the pillar area; The seismic events with energy more than 104J were mainly 214 m in front of working face and within 35 m on average away from the pillar.

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