Surrounding Rock Permeability Multi-stage Water Injection Observer

Abstract

The invention belongs to the technical field of rock destruction range and permeability measuring and discloses a surrounding rock permeability multi-section-type water-injecting observer. The surrounding rock permeability multi-section-type water-injecting observer comprises a test probe, a drilling machine, a drill rod and a control operating platform. The test probe comprise a front plugging device, a middle plugging device, a tail plugging device, a converter and a communicating pipe. The plugging devices comprise water leakage pipes, connectors and rubber bags, wherein the connectors andthe rubber bags are connected to the two ends of the water leakage pipes. The peripheries of the water leakage pipes are wrapped with the rubber bags, and a plugging cavity is formed between each rubber bag and the corresponding water leakage pipe. An outside water source is injected into the plugging cavities to expand the rubber bags, and the rubber bags and drill holes form water-injecting cavities. A testing device can work in the plugging process and the testing process under the same water source and the pressure through conversion from the plugging high-pressure water source to the observation low-pressure water source, the number of pipelines in the drill holes is decreased to be one, the problem of winding of the drill rod and a flexible pipe is eliminated, and the pressure conversion stability and the measuring efficiency of propelling each time are improved.

Description

technical field [0001] The invention belongs to the technical field of rock mass damage range and permeability measurement, and in particular relates to a multi-stage water injection observer for surrounding rock permeability. Background technique [0002] The measurement of the range and permeability of the rock mass mining fracture zone is the basic parameter for studying the failure characteristics of the rock mass. It is of great significance for further exploring the relationship between it and the movement law and stress field of the rock mass. Variable electromagnetic method, microseismic detection and pressure water test method. Among them, the pressure water test method is the most reliable. The traditional device "double-ended side leakage device" is used to conduct water injection and discharge tests to determine the development height or depth of the rock formation affected by mining. In the traditional device, there are two external systems, the water injection...

AI Technical Summary

Problems solved by technology

In the traditional device, there are two external systems, the water injection operation platform and the plugging operation platform. There are relatively many operators, and there are 2 pipes corresponding to the drilled holes. During the propelling process, mutual entanglement is prone to occur, and at least it will cause the device to be blocked. If it is blocked or the observation process is unstable, it is easy to break the gas supply pipeline, causing the equipment to fail to work normally. Moreover, the traditional device is a test unit, and the detection efficiency is low. How to realize multi-segment measurement, reduce the number of pipelines in the borehole, and can Effectively control the water pressure, the existing technology fails to solve the above problems at the same time

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