Observation method for multi-segment graded depressurization water injection based on fracture observation

Abstract

The invention discloses an observation method for multi-segment graded depressurization water injection based on fracture observation. An adopted device comprises a testing probe, a propulsion systemand a control system. The testing probe comprises plugging devices, partial pressure assemblies and a communicating pipe. Water injecting cavities are formed between the plugging devices and drill holes; the partial pressure assemblies are mounted at the tails of the front plugging device and the middle plugging device and constituted by primary converters and secondary converters; and a high-pressure water source in the communicating pipe is converted in a graded mode into a low-pressure water source to flow into the water injecting cavities to be detected. The plugging devices comprise waterleaking pipes, rubber bags and connectors, the water leaking pipes are wrapped with the rubber bags in a surrounded mode, the rubber bags are fixed to the two ends of the connectors through fasteningrings, and plugging cavities are formed between the rubber bags and the water leaking pipes. According to the testing device, the plugging process and the testing process are executed under the pressure of the plugging process and the testing process through the same external water source, the stability of pressure conversion is improved, plugging and leakage testing systems are integrated, the winding problem of a drilling rod and a hose in the propulsion process is solved, meanwhile, multi-segment measurement of propulsion every time can be achieved, and the measuring efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of rock mass permeability measurement, and in particular relates to an observation method for multi-stage graded depressurization water injection based on fracture observation. Background technique [0002] The measurement of the depth of the mining fracture zone in the mine floor is an important parameter to indicate the occurrence state of coal and rock. It is a key basic parameter in the study of mine water prevention and control. Therefore, in order to study the formation of water-conducting channels in mining surrounding rocks, it is necessary to grasp the law of rock movement and determine the height of mining damage zones. The on-site detection adopts a series of detection equipment represented by "double-end plugging leak detection device". There are multiple operation and control systems connected to the external terminals, and there are at least 2 or more pipelines in the corresponding interior. Th...

AI Technical Summary

Problems solved by technology

The on-site detection adopts a series of detection equipment represented by "double-end plugging leak detection device". There are multiple operation and control systems connected to the external end, and there are at least 2 or more pipelines in the corresponding interior. The operation process is cumbersome and There is a winding problem, and the stability is poor during the observation process

In the series of products, although the single circuit problem can be solved, there is a large range of water pressure conversion, and the stability of the conversion process is not good. It is not suitable to control the water pressure, which may easily lead to mechanical failure.

, the existing technology fails to solve the above problems at the same time

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