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Coal Engineering ›› 2026, Vol. 58 ›› Issue (1): 101-107.doi: 10.11799/ce202601013

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Rockburst prevention technology in development headings based on the three-zone loading theory

  

  • Received:2025-04-30 Revised:2025-07-21 Online:2026-01-12 Published:2026-03-04

Abstract:

Abstract: In response to the problem of preventing and controlling rockburst in excavation face under the coupling effects of large mining depth, fault structure, and lateral stress in goaf, the manifestation law of rock pressure in excavation face was analyzed through theoretical analysis, on-site measurement, and engineering inversion. Comprehensive measures for preventing and controlling rockburst, such as "drilling blasting" combination and fixed-point reinforcement support, were proposed to achieve safe excavation in the coupled stress affected area. The analysis results show that: (1) the maximum static load of the excavation face estimated based on the load three zone theory is 45.67 MPa, and the peak lateral support pressure in the goaf is 60 m away from the goaf; (2) The vibration events monitored based on microseismic data are mainly concentrated within a range of 30 meters from the top and bottom of the coal seam. The energy proportion of vibration events within a range of 30 meters from the coal seam roof is 40%, and the frequency proportion is 38%. The main layer within this range is 13.4 meters of medium sandstone, which provides guidance for the selection of parameters for roof construction under the influence of key layers; (3) Based on the inversion analysis of microseismic data, it is known that stress accumulation occurs at a distance of 55-80 meters from the track roadway, which is consistent with the 60 meter result calculated by the load three band theory.

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