Dual-segment type top/bottom plate surrounding rock breakage range observing method

Abstract

The invention discloses a dual-segment type top / bottom plate surrounding rock breakage range observing method, and relates to the technical field of mine bottom plate rock body breakage range measurement. The method includes the steps of constructing a plurality of drilled holes at regulated angles in a top / bottom plate rock layer in a coal and rock roadway in sequence; installing an observing system, making blocking capsules swell, measuring a water leakage amount parameter, and measuring a first-stage water leakage amount and a second-stage water leakage amount; conducting pressure relief drainage on the blocking capsules, wherein the water leakage amounts of two stages are measured, after the leakage amounts L1 and L2 of the two stages are obtained, pressure relief is conducted on the blocking capsules, and pressure relief drainage of all the blocking capsules are completed; promoting the observing. Measurement of detected water supply is realized at a time, and the measurement efficiency and measurement result accuracy are improved; all the blocking capsules swell by means of one time of water injecting, leakage measurement work is completed, and operation steps are reduced.

Description

technical field [0001] The invention relates to the technical field of measuring the damage range of a mine floor rock mass, in particular to a double-stage method for observing the damage range of surrounding rocks of a roof and floor. 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. Numerical simulation, empirical formula prediction, field measurement and other methods are usually used. 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 formul...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a double-stage method for observing the damage range of the surrounding rock of the roof and floor, which can realize one-time plugging and two-stage one-time measurement, which doubles the measurement efficiency; secondly, it realizes the integration of single-system water supply measurement, not only It solves the problem of multi-pipelines in the borehole, reduces the number of system structures, and realizes one swelling of the plugging capsule under the same water source, ensuring the stability of the plugging capsule during the plugging process and detection process; finally, the detection process is realized. One-time measurement of water supply improves measurement efficiency and accuracy of measurement results

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