In-situ measuring device and method for pressing-in-resistant strength of working surface bottom plate
A measuring method and technology of working face, which is applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of difficulty and low accuracy in the test of the compressive strength of the bottom plate, and eliminate the influence of external complex factors, the process Simple, low-cost effects of testing
Inactive Publication Date: 2019-05-21
CHINA UNIV OF MINING & TECH
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Problems solved by technology
[0004] Purpose of the invention: In order to overcome the deficiencies in the prior art, the present invention provides an in-situ measuring device and method for the anti-indentation strength of the bottom plate of the working face, which solves the problems of difficulty and low accuracy in testing the anti-indentation strength of the existing bottom plate
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[0029] Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these examples are only for illustrating the present invention and are not intended to limit the scope of the present invention, after having read the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.
[0030] An in-situ measuring device for the compressive strength of the bottom plate of the working face, such as Figure 1-3 As shown, it is used for the in-situ measurement of the compressive strength of the bottom plate 1 of the working face, including the anchor rod 3, the lower pressing plate 6, the jack 7, the upper pressing plate 8, the connecting assembly 9, the pressure sensor 11, and the displacement sensor 12, wherein the The lower platen 6 is placed in the...
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Abstract
The invention discloses an in-situ measuring device and method for the pressing-in-resistant strength of a working surface bottom plate, wherein the in-situ measuring device and method are used for in-situ determination of the pressing-in-resistant strength of a working surface bottom plate (1). The device comprises an anchor rod (3), a lower pressing plate (6), a jack (7), an upper pressing plate(8), a connecting assembly (9), a pressure sensor (11), and a displacement sensor (12). The pressing-in-resistant strength of a bottom plate can be tested at the original site in the field and the influence of external complicated factors can be eliminated. The pressing-in-resistant strength of the bottom plate after in-situ testing is high; and the defect of inaccurate testing data of the lab isovercome. Meanwhile, the process is simple, the equipment is simple, the operability is high, and the device can be reused; and the test cost is low. The device has the high applicability.
Description
technical field [0001] The invention relates to an in-situ measurement method in a coal mine, in particular to an in-situ measurement device and method for the compressive strength of a bottom plate of a working face. Background technique [0002] The compressive strength of the floor of the working face is a basic parameter before mining. It is not only an important parameter for the hydraulic support to determine the specific pressure of the floor, but also a key data that needs to be referred to in the design of the support along the groove of the working face and the coal pillar design of the working face. In the actual production process, the uniaxial compressive strength of the floor rock is generally approximated to the indentation strength of the coal seam floor, but the laboratory test parameters are quite different from the actual coal seam floor indentation strength. Some cases have shown that the specific pressure of the bottom plate of the hydraulic support sele...
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IPC IPC(8): G01N3/08
Inventor 白庆升屠世浩刘迅
Owner CHINA UNIV OF MINING & TECH