Raise boring machine-medium-length hole millisecond blasting cooperative one-time grooving method

Abstract

The invention discloses a raise boring machine-medium-length hole millisecond blasting cooperative one-time grooving method. The method comprises the following steps that 1, in an upper cutting roadway and a lower cutting roadway, a construction chamber is excavated in the upper cutting roadway; 2, a raise boring machine is used for downwards drilling a guide hole communicated with the cutting roadway located below, when the guide hole is drilled, the guide hole is drilled from top to bottom, then a reamer bit is replaced for reaming from bottom to top, and the guide hole is obtained; 3, a plurality of medium-length holes communicated with the interior of the lower cutting roadway are drilled in the periphery of the guide hole in the upper cutting roadway through a medium-length hole trolley; 4, the two ends in each medium-length hole are each filled with a partition piece, and a plurality of explosive packages are arranged in each medium-length hole at intervals in the vertical direction and located between the two partition pieces; and 5, a plurality of explosive packages are electrically connected with an exploder. The method is advantaged in that the explosive quantity can be effectively controlled and reduced, and the blasting hazard can be reduced.

Description

technical field [0001] The invention belongs to the field of mining, and in particular relates to a method for synergistic one-time trenching of a raise drilling rig-medium-deep hole differential blasting. Background technique [0002] In the process of phosphate rock mining, the cutting groove is the last link that needs to be prepared before mining the mine. Its purpose is to provide the initial free surface and compensation space for the stope blasting. Its formation speed and quality directly affect the uniformity of ore blasting, ore blasting Recovery rate and stope production efficiency. [0003] The traditional cutting groove forming methods include: (1) combined groove cutting method with cutting headway and cutting patio; (2) cutting groove groove method; (3) blasting groove method. Among them, the first two methods need to use the cutting sky as the blasting free surface to pull grooves, but the cutting sky is difficult to construct, it is difficult to ensure the ...

AI Technical Summary

Problems solved by technology

However, there are problems with this method: multiple blasting vibrations and impacts in the upper and lower holes, which not only increase the blasting safety risk, but also increase the blasting cost; for the roof with broken or many joints, the safety of the upward hole construction is poor and the construction is difficult High, increasing the construction period, cost increase and operator safety risk caused by dealing with the problem of overhanging the cutting groove

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