Surrounding rock mining damage range segmented testing system

Abstract

The invention discloses a surrounding rock mining damage range segmented testing system belonging to the mine top bottom plate rock damage range measuring technology field. The problems of the mine top bottom plate rock observation device such as one-time plugging multi-segment measurement, plugging leakage measurement integration, and water pressure conversion measurement can be solved. The above mentioned testing system comprises a plugging system, a guide system, a supply propulsion system, and a pressure conversion system. The plugging system comprises a first plugging unit, a second plugging unit, and a third plugging unit. Each of the plugging units comprises a water leakage pipe and pipe-shaped joints connected with the two ends of the water leakage pipe. A communicating pipe is connected between the adjacent plugging units, and the two ends of the communicating pipe are respectively connected with the pipe-shaped joints of the adjacent plugging units. A plugging capsule is disposed on the outer periphery of the water leakage pipe between the two pipe-shaped joints, and a certain plugging space can be formed between the plugging capsule and the water leakage pipe. The one-time plugging multi-segment measurement, the plugging leakage measurement integration, and the plugging of the water pressure conversion from the high pressure water source to the low pressure water source can be realized by using the testing system.

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 testing system 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...

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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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