Down-hole guiding height viewer and its observation method

Abstract

The invention discloses an underground high-conducting visualizer and an observation method thereof. The invention includes a plurality of plugging devices that are connected in series; a water injection pipeline between two neighboring plugging devices is provided with a water injection opening; one end of the water injection pipeline is connected with a water injection control platform; the plugging pipelines are mutually communicated by external connecting pipelines and are connected with expansion pipelines. When in use, firstly bores are drilled in the cover rocks needed observing; then the plugging devices connected in series are pushed into the preset position of the bores; gas is pumped into the expansion pipeline and then one section of the bores is plugged into a plurality of sections; water is injected into the water injection pipelines and the water injection opening on the water injection pipeline between the two neighboring plugging devices are opened in sequence; water is injected into the terrane that the section of bores lies in; finally the cranny growth situation inside the cover rocks is analyzed according to the water injection seepage discharge of each section of terrane. The underground high-conducting visualizer has simple structure, is convenient for use, can realize simultaneous plugging, water injection by section and multi-section seepage detection, improve the observing efficiency and has highly reliable detection result.

Description

technical field [0001] The invention relates to a mining engineering and rock mass engineering testing technology, in particular to a device and method for observing the guide height of overlying rock in an underground stope. Background technique [0002] After the coal seam is mined, the roof overlying rock will be damaged accordingly. This kind of damage will have a particularly serious impact on coal mining under water or under confined water, because if the crack zone of the roof overlying rock reaches the water source, the coal mine will have a water body. crash into. The height of the water-conducting fissure zone can be calculated according to the theoretical formula, but due to the complexity of the calculation of rock formation parameters and the error of the calculation formula, the height of the water-conducting fissure zone deduced by the formula will have a large error. Therefore, the field observation of the water-conducting fracture zone in the coal mine is t...

AI Technical Summary

Problems solved by technology

However, because it can only separate a section of rock formation at a time, and then observe the water injection leakage (water injection volume), each time a complete working process must be passed through the double-ended water blocking device, swelling, water injection pressure regulation and testing; water injection pressure And the swelling pressure of the capsule needs to be manually controlled; and the swelling pipeline in the water stopper adopts the internal connection method, the instrument structure is complicated, and the observation work efficiency is low

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