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Coal Engineering ›› 2023, Vol. 55 ›› Issue (7): 39-44.doi: 10.11799/ce202307007

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Rapid construction technology of large section and hard rock roadway blasting#br#

  

  • Received:2023-02-02 Revised:2023-04-23 Online:2023-07-20 Published:2025-04-07

Abstract:

In order to solve the problems of low roadway tunneling efficiency and slow mining area preparation, the reasons affecting the excavation efficiency were analyzed from the aspects of support design, blasting parameters,corollary equipment,efficiency of gangue transportation, construction quality and organization management.”Five-in-one” rapid construction technology of rock roadway blasting under complex and multi-factor conditions was put forward,which inclued differential support design,mechanized equipment and improvement,Linear Energy Accumulation Smooth Blasting,flexible continuous gangue discharging system,Construction technology and labor organization guarantee.Engineering practice has been carried out in the track roadway of xi’san lower panel, Rapid construction line of rock tunnel blasting was comprised by “hydraulic drilling-Linear Energy Accumulation Smooth Blasting- Safty and efficient support scheme-flexible continuous gangue discharge". Practice shows that Rapid tunneling under complex and multi-factor conditions was realized by adopting "five-in-one" rapid construction technology of rock roadway blasting,The efficient driving system of fast drilling, efficient tunneling,continuous drainage of gangue and effective support is realized.The tunneling footage was increased by 126%,which is 86 meter per month,the artificial efficiency was increased to 2.04 meters per month and each employee,Footage efficiency of rock roadway blasting was significantly improved.

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