Forming device and method of underground large-diameter horizontal rescue borehole for mine accidents

Abstract

The invention discloses a forming device and a method of underground large-diameter horizontal rescue borehole for mine accidents. The device comprises a ring-shaped bit, a central bit and a casing shoe. The ring-shaped bit is provided with a ring-shaped bit shoulder and a spiral locking structure of the ring-shaped bit, the spiral locking structure of the ring-shaped bit is used for rotatably unlocking, the central bit is provided with a central bit shoulder and a spiral locking structure of the central bit, the locking structure of the central bit spiral is used for rotatably unlocking, a chip groove is formed in the side wall of the central drill along an axial direction, one end of the casing shoe is arranged on the ring-shaped drill in a sleeved mode, the other end of the casing shoe is arranged on the central drill in a sleeved mode, the spiral locking structure of the ring-shaped drill is coordinately connected with the spiral locking structure of the central drill. The invention also discloses a hole-forming method for underground large-scale horizontal rescue during mine accident. The hole-drilling and hole-forming device and the hole-forming method for underground large-scale horizontal rescue during mine accident allows the large-diameter rescue borehole to be formed once, has high drilling efficiency and benefits speeding-up of rescue.

Description

technical field [0001] The invention belongs to the technical field of mine accident rescue, and in particular relates to a drilling device and a hole forming method for underground large-diameter horizontal rescue of mine accidents. Background technique [0002] Underground accidents in coal mines mainly include gas accidents, floods, fires, roof falls, and dust disasters. These disasters and accidents often cause huge equipment and property losses, as well as people being trapped and personal casualties. In the process of coal mine production, effective measures should be taken to prevent underground disasters and accidents; for disasters and accidents that have occurred, they should be remedied in time, especially in the case of people trapped, full and timely rescue must be carried out to minimize casualties. At present, manual rescue is a routine means of mine accident rescue and plays a dominant role in mine rescue. However, in some cases (such as roadway collapse, s...

AI Technical Summary

Problems solved by technology

This drilling technology adopts the open-hole drilling technology, and the hole wall has no support protection. It is only suitable for large-diameter rescue drilling construction under stable ground conditions. , rock formations with developed cracks, etc.), the stability of the hole wall is poor, the hole formation is difficult, and it cannot meet the needs of rescue; the drilling tools of this construction technology are complex and the construction steps are cumbersome, resulting in a large drilling workload and low construction efficiency. low, thus affecting the rescue progress; using this drilling technology to carry out large-diameter rescue drilling construction, cuttings often cannot be completely discharged from the drilling hole, and the cuttings left in the hole will accumulate at the lower edge of the hole wall, which will bring disadvantages to the rescue operation Influence: Large-diameter rescue boreholes constructed in coal seams will release gas into the boreholes, resulting in lack of oxygen in the boreholes, threatening safe rescue

Images