Uniaxial loaded coal ultrasonic velocity testing system device and experimental method thereof

Abstract

The invention relates to a uniaxial loaded coal ultrasonic velocity testing device. The device comprises a bearing stand column, a cross beam, a base, a workbench, a lifting driving mechanism, an upper detection body, a lower detection body, an acoustic transducer, a resistance strain gauge and a control circuit, wherein two ends of the bearing stand column are vertically connected with the cross beam and the base respectively to form a rectangular frame structure; the upper detection body and the lower detection body are respectively arranged on the base and the workbench on the cross beam, and respectively comprises a bearing column, a hard positioning casing, an elastic positioning sleeve and a pressure-bearing end; and the acoustic transducer is embedded in the elastic positioning sleeve. The experimental method of the device comprises three steps of collecting a coal sample, detecting the coal sample and summarizing and calculating detection data. According to the device and method, the work efficiency and accuracy of coal mechanical performance detection operation can be effectively improved on the one hand, and on the other hand, the universality of detection equipment can be effectively improved while the detecting operation efficiency is improved.

Description

technical field [0001] The invention relates to a uniaxially loaded coal body supersonic velocity test system device and an experimental method, belonging to the technical field of geological survey. Background technique [0002] The structure and physical properties of coal-measure strata are of great practical significance to the safe, efficient and green underground mining of coal and the development of coalbed methane. At present, the main method of obtaining information on the structure and physical properties of coal-measure strata is still based on exploration. In the process of geological exploration, the medium is mainly explored by ultrasonic operation. It is currently found in the process of ultrasonic geological exploration. On the one hand, the current The structure of the current ultrasonic exploration equipment is often relatively complex, the use of flexibility is poor, and the operation is difficult. Obtain elastic parameters such as Young's modulus, shear ...

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Problems solved by technology

At present, the main method of obtaining information on the structure and physical properties of coal-measure strata is still based on exploration. In the process of geological exploration, the medium is mainly explored by ultrasonic operation. It is currently found in the process of ultrasonic geological exploration. On the one hand, the current The structure of the current ultrasonic exploration equipment is often relatively complex, the use of flexibility is poor, and the operation is difficult. Obtain elastic parameters such as Young's modulus, shear modulus, bulk modulus, Poisson's ratio, longitudinal wave velocity, and shear wave velocity of the geological exploration operation surface, which leads to poor comprehensiveness of the mechanical detection performance of the current geological exploration operation on the detection operation surface , lack of general-purpose detection equipment and other defects, so in view of this problem, it is urgent to develop a new ultrasonic detection device and detection method for geological exploration to meet the needs of actual use

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