Rock mass permeability in situ test device

Abstract

The invention belongs to the technical field of a rock mass failure range and permeability measurement, and discloses a rock mass permeability in situ test device. The device comprises a test probe, apropulsion mechanism and a control mechanism, the test probe comprises a rubber capsule, a water leakage pipe, a converter and a communication pipe, the two ends of the water leakage pipe are respectively connected to a joint one, a joint two or a joint three, the rubber capsule is wrapped on the outer side of the water leakage pipe between the two joints, and a certain sealing cavity is formed between the rubber capsule and the water leakage pipe. The inside of the converter is provided with a conical conversion body, a water-passing hole and an annular water tank are respectively formed inthe inside and the surface of the conical conversion body, and a water leakage passage is formed with the hole in the converter. The test device can utilize the switch of a sealing high-pressure watersource to an observation low-pressure water source, achieve work of a sealing process and a test process under the same water source and respective pressures, reduce the number of pipes in a boreholeto one, eliminate the problem of entanglement of a drill pipe and a hose, and improve the stability of the work process.

Description

technical field [0001] The invention belongs to the technical field of rock mass damage range and permeability measurement, and in particular relates to an in-situ testing device for rock mass permeability. Background technique [0002] The permeability of rock mass is an important parameter to reflect the failure characteristics of rock mass. The change of rock mass permeability is closely related to its failure. Exploring its permeability change can further judge the damage range of rock mass. It is very important for further research on rock mass failure mechanism and water inrush mechanism is of great significance. At present, the commonly used methods for detecting the damage range of rock mass include direct current method, transient electromagnetic method, microseismic detection and pressure water test method. Since the direct current method and the transient electromagnetic method are easily affected by the electromagnetic field of the working environment, and the m...

AI Technical Summary

Problems solved by technology

Since the two external water supply and gas supply consoles are independent of each other, it is bound to cause the correspondingly connected water supply (for observation) and gas supply (for plugging) two pipelines to occur as the test probe advances in the drilling process. The two pipes are entangled with each other, which may cause the device to be blocked or the observation process to be unstable, or the gas supply pipe may be easily broken, causing the equipment to fail to work normally.

How to integrate the plugging and supply operation platform into one, reduce the number of pipelines in the borehole, and at the same time make the plugging process and the observation process work under their respective pressures and maintain the real-time replenishment process, the existing technology fails to solve the above problems at the same time

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