Rigid bearing plate center hole method servo control deep rock deformation test device and method

Abstract

The invention discloses a test device for servo control of deep rock mass deformation by using a rigid bearing plate center hole method, and a method for the device. The test device comprises a load control device, a force transmission device and a surface and deep part deformation measurer. The device is characterized in that the force transmission device is a jack, of which the upper end contacts a force transmission column; a top plate is arrange above the jack and contacts the top of a hole; the lower end of the jack contacts a force transmission laminating plate; a bearing plate is arranged below the jack and contacts a rock mass surface; communicated holes are formed at the centers of the force transmission laminating plate and the bearing plate below the jack and connected with rock mass boreholes, namely displacement of different depth points in the rock mass boreholes is subjected to deep displacement deformation measurement by virtue of connection of a measuring bar and a displacement sensor by using the center hole in the rigid bearing plate; a pressure sensor is connected with the jack; and the displacement sensor and the pressure sensor are respectively connected with a collector and a computer, so that real-time servo control of the test pressure, and automatic collecting and recording of pressure and deformation are achieved, and charts of all data are formed.

Description

technical field [0001] The invention belongs to the technical field of rock mass mechanics tests, and relates to a test device suitable for on-site rock mass deformation and rock mass load, in particular to a rigid pressure bearing plate central hole method servo control deep rock mass deformation test device and method. Background technique [0002] At present, there are generally two types of on-site rock mass deformation tests, rigid and flexible bearing plate methods, of which the rigid bearing plate method can only measure the surface deformation of rock mass, and the flexible central hole bearing plate method can simultaneously measure surface and deep rock mass deformation. The hydraulic pillow of the flexible bearing plate method is limited by the processing level. The test stress is generally within 10MPa, and the conventional stress level of the rigid bearing plate method is ≤20MPa. Conventional rigid and flexible pressure-bearing plate method and flexible center-h...

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Problems solved by technology

[0005] Another object of the present invention is to provide a servo-controlled deep rock mass deformation test method. While measuring the deformation data of the rock mass surface, the central hole provided with the force transmission device and the drilled hole are connected through the central hole method of the rigid pressure plate. Connected, install displacement anchor heads at different depths of the borehole for deep rock mass deformation tests, record and collect deformation and pressure in real time and form a chart, thereby solving the problem of deep rock mass deformation test equipment under extremely high stress conditions

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