Bottom plate mining failure zone segmental observation method

Abstract

The invention discloses a bottom plate mining failure zone segmental observation method, belonging to the technical field of mine bottom plate rock mass failure scope determination. The observation method includes the steps of boring a detection hole, installing an observation system, expanding all of the plugging capsules, determining the water leakage amount parameters, and pressure-releasing and draining the plugging capsules. The plugging system in the observation system includes plugging outer pipes, a capsule water inlet switch, plugging capsules, and a slip sleeve, the top part of the plugging outer pipe between the adjacent plugging capsules is provided with a drain hole, the detection inner pipes in the detection system are arranged inside the plugging outer pipes and perform relative sliding in the plugging outer pipes, and the capsule water inlet switch is arranged on the plugging outer pipe at the outermost side of the plugging capsules. The expansion of all of the plugging capsules can be realized by the water filling in one step, the one-time plugging multi-section successive measurement of the observation system can be realized, the measuring efficiency is improved, and the power supply determination integration of a single system can be realized.

Description

technical field [0001] The invention belongs to the technical field of measuring the damage range of mine floor rock mass, and in particular relates to a segmented observation method for floor mining damage zones. Background technique [0002] The measurement of the damage range of rock mass on the roof and floor of mine is an important parameter to indicate the occurrence state of coal rock. It is a key basic parameter in the study of mine water prevention and control. Therefore, to study the formation of water-conducting channels in mining surrounding rocks, it is necessary to grasp the movement rules of rock strata and determine the damage range of roof and floor rock mass. At present, in the existing technology, numerical simulation, empirical formula prediction, field measurement and other means are usually used for observation. [0003] However, due to the complex site conditions, to a certain extent, the numerical simulation cannot reflect the site conditions well, a...

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Problems solved by technology

[0004] The task of the present invention is to provide a segmented observation method for the mining failure zone of the floor. The observation method can firstly realize the one-time blockage of the observation system and the sequential measurement of multiple sections, which improves the measurement efficiency; secondly, it realizes the integration of single-system water supply measurement, It not only solves the problem of multi-pipeline winding in the borehole, but also reduces the number of operating systems (in the traditional measurement, the plugging system and the leakage detection system are measured separately), and at the same time realizes the conversion of the water pressure of the same water source, ensuring the sealing The plugging process and the detection process work under their respective water pressures; finally, the high-pressure water filling of the plugging capsule is easily broken, and the stability of the measurement process is improved.

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