Abstract:The mining of deep-shaft metal mines is faced with severe ground pressure disaster, and greatly threatens the safety of underground operators and equipment. Drift advancement destroys the in-situ stress field of the deep protolith, and is under the risk of tunnel face rock burst caused by the redistribution of in-situ stress and the accumulation of high stress. This paper studies the tunnel face rock burst disaster prevention in the scenario of tunnel face rock burst during drift advancement in a deep-shaft and high ground stress mine. The mechanism of tunnel face rock burst and the idea of advance pre-splitting blasting for pressure relief blasting are put forward. The impact of advance pressure relief blasting depth on the pressure relief effect and the process scheme of tunnel face advance pressure relief blasting are analyzed, which is of vital importance to prevent rock burst disaster from happening hazards in front of the tunnel face, and offers reference to drift advancement in deep-shaft mines.
