[an error occurred while processing this directive]

Coal Engineering ›› 2024, Vol. 56 ›› Issue (5): 58-63.doi: 10.11799/ce202405009

Previous Articles     Next Articles

Design and application of self-formed roadway support for cutting roof and relieving pressure in one-kilometer deep mine#br#

  

  • Received:2022-05-23 Revised:2024-04-12 Online:2023-05-20 Published:2025-01-03

Abstract:

After the coal seam mining has entered 1000 meters, it is difficult to keep roadway along gob due to the comprehensive factors such as the significant increase of ground stress, softening of surrounding rock, high gas and broken roof. In order to solve the self-formed roadway problem of roof cutting and pressure relief under complex deep conditions, taking the 703 working face of Hongyang No. 3 Mine as the research object, the constant resistance anchor cable support and self-formed roadway of roof cutting were integrated and applied, and the stress of roadway roof and the deformation of roadway surrounding rock were monitored. The results show that: Blasting cut in ahead of working face roof roadway were significantly reduce stress, a lane area of roadway roof subsidence is small, the overall even roof subsidence about 385 mm, maximum subsidence of about 280 mm, the average floor drum up even a maximum of 545 mm, rubble lane no obvious side drum phenomenon, help the entity coal help phenomenon, no significant piece of meet the requirements of safety and use, The deformation of surrounding rock of roadway is controllable and the effect of retaining roadway is good

CLC Number: