Rectangular drilling device based on fan-shaped drill bit and drilling method

Abstract

The invention discloses a rectangular drilling device based on a fan-shaped drill bit and a drilling method. The rectangular drilling device based on the fan-shaped drill bit comprises a hollow drill rod and a drill bit, and the hollow drill rod is formed by fixedly connecting a guide drill rod and a connection drill rod and used for carrying drill bit to drill by linear advance; the connection drill rod is used as a connection rod between the guide drill rod and a drilling machine, the guide drill rod plays the fixing guide effect, and it is ensured that the fan-shaped drill bit cannot drill obliquely in the drilling process; and the drill bit is arranged on the outer side wall of the guide drill rod, the drill bit realizes rotation depending on power of a motor arranged in the guide drill rod, and the shape of the drill bit guarantees that a rectangular drill hole can be drilled in the rotating process of the drill bit. According to the rectangular drilling device based on the fan-shaped drill bit and the drilling method, the rectangular drill hole can be drilled, a rectangular stress monitoring device can be effectively installed, a basis can be laid for monitoring an accurate stress evolution law, and important significance is achieved for preventing and controlling mine dynamic disaster.

Description

technical field [0001] The invention belongs to the technical field of drilling equipment, and in particular relates to a fan-shaped drill bit-based rectangular drilling device for soft rock or rock soil. Background technique [0002] my country is still in the historical stage of accelerated industrialization and urbanization, and there is still room for growth in total energy demand. Coal, as the main fossil energy in my country, is the most stable, economical and self-guaranteed energy source. In the future, the main body of coal will be Energy status will not change. With the increase of coal mining depth and mining intensity, disasters such as large roadway deformation, rock burst, coal and gas outburst have become more and more prominent, which seriously threaten the safe production of coal mines. Stress is the fundamental driving force for the deformation and failure of surrounding rock during coal mining. Only by fully understanding the characteristics of stress dist...

AI Technical Summary

Problems solved by technology

[0003] (1) The circular borehole stress gauge will rotate during the installation process, which cannot ensure that the probe is perpendicular to the stress monitoring surface, so that the stress direction cannot be correctly judged

[0004] (2) The circular borehole stress gauge probe will only produce stress values ​​when the borehole wall collapses, and the extrusion stress of the borehole wall from integrity to collapse cannot be measured

[0005] Rectangular borehole stress gauges will not have the defects in the installation of circular borehole stress gauges during installation, but the current drilling devices generally can only drill round holes, not rectangular boreholes

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