Application of blasting groove broaching method in underground stope of metal mine

Abstract

The invention discloses application of a blasting groove broaching method in an underground stope of a metal mine, belongs to the technical field of mining engineering methods, and is used for cutting and groove broaching in the underground stope of the metal mine. According to the technical scheme, firstly, more than or equal to two rows of fan-shaped deep blast holes are formed in the position of a cutting groove of a stope; the length of the cutting roadway is larger than or equal to the designed length of the cutting groove; then, top falling with the height gradually reduced is carried out on the cutting roadway from inside to outside in the side hole direction of the fan-shaped deep hole blast hole, and a protection layer larger than or equal to 500 mm is reserved between a top falling area and the fan-shaped deep hole blast hole; and finally, the cutting gate way and the roof falling area serve as free faces of groove broaching blasting, the fan-shaped deep blast holes are gradually blasted, and a cutting groove is formed. The method is the first creation of metal mine chamber cutting engineering, the construction period is greatly smaller than that of a cutting gate way and cutting well groove broaching method, the working procedures are optimized, the construction cost is reduced, and the safety coefficient and the chamber ore preparation efficiency are improved.

Description

technical field [0001] The invention relates to a blasting trough method used in the underground stope of a metal mine, and belongs to the technical field of mining engineering methods. Background technique [0002] In the production of underground mines in my country, the mining room cutting process is one of the most critical mining processes in the underground mining of ore deposits. No matter what mining method is used, the mining room needs to be cut before the formal mining. The cutting work is the preparatory work for the compensation space provided for the initial mining face and mine collapse. The completion of the cutting project marks the end of the mining work and the beginning of the mining work, which plays a key role in connecting the past and the future. Whether the cutting project can be constructed according to the design requirements and the quality of the cutting groove are directly related to whether the mining can be carried out normally and the pros a...

AI Technical Summary

Problems solved by technology

Disadvantages of the method of cutting horizontal entry and cutting shaft and pulling grooves: first, it is difficult to operate when digging the cutting shaft and the well-forming effect cannot be guaranteed. When the well-forming effect is not achieved, the construction of pulling grooves is restricted, which brings operational difficulties and Potential safety hazards; second, when the cutting well construction achieves the expected results, the formed cutting well empty area has potential safety hazards of falling rocks and slippery materials, which affects the operation safety of blasters

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