Sectionalized test system for floor mining-induced damage range

Abstract

The invention discloses a sectionalized test system for a floor mining-induced damage range. The sectionalized test system comprises a detection system, a blocking system and a supply determining system, wherein the detection system is mounted in a drill hole of a fractured zone; the blocking system is used for blocking the drill hole; the detection system comprises a test probe formed by sequentially connecting a plurality of detection units, the adjacent detection units are detachably connected through a slot joint, fixed type pressure adjusting valves are arranged in the slot joints of the detection units at the front part and in the middle, and a detachable type pressure adjusting valve is arranged in the slot joint of the detection unit at the tail part. According to the sectionalized test system, the plurality of detection units are sequentially connected to form the test probe, pressure values are adjusted by the fixed type pressure adjusting valves and the detachable type pressure adjusting valve, the pressure values of all detection units keep equal, further, the drill hole can be measured synchronously, the workload is reduced by times, and the measurement precision is improved.

Description

Technical field [0001] The invention belongs to the technical field of measuring the depth of the mining damage zone of a mine, and specifically relates to a segmented testing system for the mining damage range of a floor. Background technique [0002] The measurement of the depth of the cracked zone in the mine floor is an important parameter that marks the occurrence of coal and rock. It is a key basic parameter when studying mine water prevention and control. Therefore, in order to study the formation of water channels in mining surrounding rocks, it is necessary to grasp the law of rock movement and determine the height measurement of the mining failure zone. Numerical simulation, empirical formula prediction, field measurement and other methods. [0003] However, due to the complex site conditions, to a certain extent, the numerical simulation cannot reflect the site conditions well, and the empirical formula predicts the blindness. As the depth of mining increases, the appli...

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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 becomes worse and worse.

The equipment used in the field measurement can only measure one section at a time, and the measurement length of each section is about 1.5m, while the length of the borehole is about 30-50m. The pressure error and the defect of the equipment itself lead to the fact that each measurement section of the original equipment cannot be too long, resulting in a small number of measurement sections (usually 1 measurement section), heavy workload, many times of movement, and inaccurate measurement.

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