Synchronous leak detection method for multi-stage plugging in overlying strata failure zone

Abstract

The invention discloses a synchronous leak detection method for multi-stage sealing of overlying rock damage zone. The operation steps include: drilling an upward drilling hole into the roof rock layer in a coal-rock roadway, the hole depth is 30-50m; installing a detection system and It is sent into the initial position of the borehole; the above-mentioned borehole is closed by the plugging system; the water source of a specific pressure is sent to the water inlet pipe by the water injection operation table, and the gas pressure in the plugging capsule is controlled to be slightly higher than the gas pressure of the gas and the plugging chamber The pressure of the water in the return pipe; correct the water pressure in the return pipe; after the water pressure in the return pipe is adjusted within a reasonable water pressure range, measure the flow vector parameters, turn on the electronic recorder, and provide the corresponding water source pressure. After stabilization, record For water flow data and other related data, the collected data is processed and analyzed to form the corresponding flow vector diagram of the measurement section; then repeat the above steps to measure the boreholes in turn. The method of the invention can realize multi-segment and synchronous measurement of arbitrary angles of the top plate water-guiding fissure zone.

Description

technical field [0001] The invention belongs to the technical field of measuring the height of a mine water-guiding fissure zone, and in particular relates to a method for synchronous leak detection of multi-segment plugging of an overlying rock failure zone. Background technique [0002] The measurement of the height of mine water-conducting fissures is an important parameter to indicate the occurrence state of coal rocks. When studying mine water control, it is a key basic parameter. 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 measurement of water-conducting fissure zones. The existing technology In the process, numerical simulation, empirical formula prediction, field measurement and other means are usually used for determination. [0003] However, due to the complex site conditions, to a certain extent, the numerical simulation cannot refle...

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Problems solved by technology

[0003] However, due to the complex site conditions, to a certain extent, the numerical simulation cannot reflect the site conditions well, and the blindness of the empirical formula is relatively large. As the mining depth increases, the applicability of the empirical formula is getting worse; and the field The equipment used in the actual measurement can only measure one section at a time, and the measurement length of each section is about 1.5m, while the drilling length is about 30-50m, which causes the measuring equipment to move too many times in the drilling. The measurement can only be completed by repeated movement. Due to the head pressure error caused by the inclination angle of the borehole and the defects of the equipment itself, the measurement section cannot be too long each time. Many times, inaccurate measurement and other problems

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