Drilling stress directional monitoring device and method

Abstract

The invention provides a drilling stress directional monitoring device and method. The drilling stress directional monitoring device is constituted by a stress data collecting instrument, a wire, a stress sensor and a direction control device; the direction control device is jointly composed of a separable conical drilling bit, an air-blowing dust clearing casing, a directional propulsion groutingpipe, a gradienter, and an open-hole protractor; and the stress testing direction is determined through the gradienter and the open-hole protractor, the direction of the stress sensor is kept unchanged through the direction control device in the process of being propelled into a drilled hole, and thus the direction and magnitude of drilling stress in a coal roadway are accurately measured. The structure and method are easy, on-site operation is easy, the dynamic change of the drilling stress magnitude can be monitored in real time, and thus the drilling stress is tested and evaluated in realtime.

Description

technical field [0001] The invention relates to a device for measuring drilling stress of a rock mass, in particular to a directional monitoring device and method for accurately positioning a drilling stress gauge. Background technique [0002] In the era of the 21st century, shallow coal resources have entered the final stage of mining, and the mining of minerals at home and abroad has gradually shifted to deep mining, and kilometer-deep mines have become very common. With the continuous increase of mining depth and mining scale, the change law of ground stress is becoming more and more complex, especially in the process of deep excavation, which will cause stress redistribution and have a huge impact on the safety of coal mine production. Therefore, only accurate real-time Only by monitoring the change law of mining dynamic pressure accurately, and effective initial prediction and trend analysis of stope rockburst, can a more reasonable selection of support forms be made t...

AI Technical Summary

Problems solved by technology

At present, the borehole stress gauge is an effective means to monitor the stress change of the coal seam stope, but because the boreholes in the coal roadway are drilled with short drill pipes, the drilling path is tortuous, there is more coal ash, and the deep coal seam Drilling is affected by deep high stress and strong disturbance, and the drilling is easy to form a collapsed hole after the hole is formed

When the traditional drilling stress gauge is pushed inward, the direction of the stress sensor cannot be controlled, and the drilling stress in the specified direction cannot be accurately measured

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