Engineering comprehensive hole measuring system and method based on in-hole camera shooting and single-hole sound waves

Abstract

The invention discloses an engineering comprehensive hole measuring system and method based on in-hole camera shooting and single-hole sound waves. The engineering comprehensive hole measuring system comprises a combined measuring probe. The combined measuring probe stretches into a borehole of a rock mass, a push rod is arranged behind the combined measuring probe, the combined measuring probe is connected through a hole opening fixing device, the hole opening fixing device is arranged at the opening of the borehole, a depth sensor is arranged at the front end of the push rod, the depth sensor and the combined measuring probe are connected with a main measuring machine, and the combined measuring probe is pushed to move forwards by controlling the push rod to collect and analyze in-borehole data. The machine learning and data mining method is adopted, the decision tree algorithm, the k-means clustering algorithm and the Apriori association algorithm are utilized to analyze in-hole camera shooting and single-hole sound wave data, and the automation degree and accuracy of exploration forecasting are improved. By means of the engineering comprehensive hole measuring system and method, the workload of in-hole camera shooting and single-hole sound wave detection can be greatly reduced, and meanwhile the detection time can be shortened.

Description

technical field [0001] The invention relates to an engineering comprehensive hole measuring system and method based on in-hole camera and single hole sound wave. Background technique [0002] Due to the rapid development of the national economy, my country has now become the country with the largest scale and difficulty in tunnel construction in the world. In the next 10 years, tens of thousands of kilometers of new tunnels will be built in the railway and highway fields, and more than 60 key hydropower projects and dozens of water diversion projects will be built. Hundreds of deep and long tunnels will be built in the project, and the transportation network will also develop in depth from the east to the west, showing the distinctive characteristics of "high standards, long lines, large scale, high ratio of bridges and tunnels, and many deep and long tunnels". Some tunnel projects are buried as deep as 1,000 meters or even more than 2,000 meters, and unfavorable geological b...

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Problems solved by technology

[0007] (3) The current single-hole acoustic wave instrument only includes a cable and a sound wave probe with one send and two receivers, and no water plugging device is designed for the borehole opening. This kind of equipment can complete the detection in the vertical hole, but in the tunnel In the geophysical prospecting work, when detecting the rock mass in front of the tunnel face, due to the limitation of the site conditions, most of the drilling holes are horizontal holes or intersect with the horizontal direction at a small angle

In order to ensure that the hole is filled with water, the hole needs to be blocked. The current method is to install a steel plate with a hole and use an anchoring agent to block it. In this method, a large amount of water will flow out of the hole during the water injection process. , can not guarantee the degree of water saturation in the hole, affecting the detection effect of single hole acoustic wave

In the process of comprehensive hole measurement, the hole needs to be artificially filled with water. If the existing technology directly injects water into the hole, there will be the following two problems: one is that the water filling in the hole cannot be guaranteed, and it is easy to cause the water in the hole to be unstable. Saturation will affect the sound wave detection. Secondly, during the water filling process, if the water flow velocity is too high, it will cause the water in the hole to be turbid, which will affect the detection effect of the TV in the hole.

[0008] (4) When performing in-hole detection, not only the data in the hole needs to be collected, but also the depth reached by the probe needs to be measured. The existing method uses a single pulley speed sensor with manual marking counting, in addition to using a speed sensor for data collection In addition, equidistant marks are made on the cables or push rods at the same time, and personnel are arranged to count separately during the measurement; with this method, due to the influence of the push rod or cable force: when the force on the pulley is too small, it cannot Sufficient frictional resistance is generated, and the pulley does not rotate; when the force on the pulley is too large, the pulley is under pressure and transmitted to the rotating shaft, and the friction between the rotating shafts is too large, which will also cause the pulley to not rotate, which will eventually affect the accuracy of depth measurement

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