In-situ measuring device for elastic modulus of coal
An elastic modulus and in-situ measurement technology, which is applied in the direction of applying stable tension/pressure to test the strength of materials, can solve problems such as large differences, and achieve the effects of large measurement range, high measurement accuracy and convenient operation
Pending Publication Date: 2019-06-28
TIANDI SCI & TECH CO LTD
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Problems solved by technology
Existing drilling models mainly rely on the hydraulic system to apply load to the borehole wall. Due to the limitation of the diameter of the drilling model itself and the influence of pipeline resistance and system loss in the hydraulic system, the existing drilling models The measured results are often quite different from the actual values
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[0023] In order to make the purpose, technical solutions and advantages of the invention clearer, the technical solutions in the invention will be clearly described below in conjunction with the accompanying drawings in the invention. Obviously, the described embodiments are part of the embodiments of the invention, not all of them. Example. Based on the embodiments of the invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the invention.
[0024] In the description of the present invention, unless otherwise specified, the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right" etc. is based on the orientation or positional relationship shown in the drawings, and is only for the purpose of It is convenient to describe the present invention and simplify the description, but does not indicate or imply that the device or element referred to must ...
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The invention relates to the field of roadway construction, and provides an in-situ measuring device for elastic modulus of coal. The device comprises pressure sensors, a displacement sensor, a telescopic assembly and cushion blocks; the telescopic assembly comprises a screw rod as well as a first connecting rod, a second connecting rod, a third connecting rod and a fourth connecting rod which arehinged respectively from head to tail through connectors, a through hole is formed in the connector hinged with the first connecting rod and the second connecting rod, a threaded hole in threaded fitconnection with the screw rod is formed in the connector hinged with the third connecting rod and the fourth connecting rod, and after the first end of the screw rod sequentially penetrates through the thread hole and the through hole, the first end of the screw rod is connected with a limit block and stretches out of the second end; cushion blocks are arranged on one side of two connectors backward to the screw rod, one of the two connector is hinged with the first connecting rod and the fourth connecting rod, the other connector is hinged with the second connecting rod and the third connecting rod, the pressure sensors are arranged between the cushion blocks and the connectors adjacent to the cushion blocks, the displacement is used for measuring the distance between the two cushion blocks. The device is simple in structure, convenient to operate, large in measuring range and high in measuring accuracy.
Description
technical field [0001] The invention relates to the technical field of roadway construction, in particular to an in-situ measuring device for coal body elastic modulus. Background technique [0002] During the construction of coal mine roadway, it is necessary to calculate and analyze various parameters of the roadway, such as the deformation analysis of the roadway, the prediction analysis of the surface subsidence area in the mining area, and the numerical analysis of the response of the roadway under the external load, etc. The elastic modulus of the coal body is used in these analysis and calculation processes, and the elastic modulus of the coal body is a key parameter to measure the ability of the coal body to resist elastic deformation. [0003] At present, the borehole modulus meter is a common equipment for measuring the elastic modulus of underground coal in coal mines. Existing drilling models mainly rely on the hydraulic system to apply load to the borehole wall...
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Inventor 雷顺康红普张晓高富强司林坡杨景贺吴拥政李建忠王晓卿吴建星伊丙鼎任硕刘跃东
Owner TIANDI SCI & TECH CO LTD