Segmented testing method for surrounding rock mining destruction range

Abstract

The invention discloses a segmented testing method for a surrounding rock mining destruction range, and belongs to the technical field of mine top and bottom plate rock mass destruction range determination. The determination problems of one-time plugging multi-segment measuring, plugging and leakage measuring integration, internal water pressure conversion of mine top and bottom plate rock mass observation equipment are solved. An adopted testing system comprises a plugging system, a guiding system, a feeding propelling system and a pressure converting system; each plugging unit of the plugging system comprises a water leakage tube and tubular joints connected to the two ends of the water leakage tube, a communicating tube is arranged between every two plugging units, the two ends of each communicating tube are connected to the tubular joints of the adjacent plugging units respectively, the periphery, between two tubular joints, of each water leakage tube is provided with a plugging capsule, and a certain plugging space is formed between each plugging capsule and the corresponding water leakage tube. According to the testing method, one-time plugging multi-segment measuring, plugging and leakage measuring integration and pressure conversion from a plugging high-pressure water source to an observing low-pressure water source can be simultaneously achieved.

Description

technical field [0001] The invention belongs to the technical field of measuring the damage range of rock mass on the roof and floor of a mine, and in particular relates to a segmented test method for the damage range of surrounding rock mining. 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. [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 th...

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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.

First of all, due to the excessive number of pipelines working at the same time in the existing observation equipment, especially during the propulsion process, the problem of pipeline entanglement in the borehole is prone to occur. The observed water pressure is generally 0.1MPa, and the observed water source pressure in the borehole should not be too high, otherwise, it will cause expansion of the original cracks in the borehole wall

Under the same external water source, how to make the plugging water source and the observation water source in the integrated observation equipment work at the same time under their respective pressures? Finally, because the drilling length is approximately 50-70m, the test site often uses a single-stage water injection observation instrument. Advance the measurement length (about 1m), too many advances will greatly increase the manual workload, which may affect the measurement accuracy

The prior art fails to solve the above three problems simultaneously

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