Device and method for integrated collection of stress and displacement of surrounding rocks
A technology of surrounding rock stress and acquisition devices, which is applied in the direction of using optical devices, measuring devices, and measurement of the change force of optical properties of materials when they are stressed, can solve the distortion of test results, mutual interference of drilling holes, and force transmission. Unreliable and other problems, to achieve the effect of ensuring accuracy and reliability, avoiding displacement test results, and avoiding mutual interference
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[0048] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:
[0049] as attached figure 1 As shown, the surrounding rock stress and displacement integrated acquisition device of the present invention is mainly composed of a plurality of spheres 1 , sleeves 2 , steel wires 3 and optical cables 4 whose elastic modulus is similar to that of the surrounding rock to be measured. The plurality of spheres 1 are 2 to 10, and the number is selected according to the test range. Sleeves 2 are arranged between the plurality of spheres 1, and the plurality of spheres 1 are screwed together through the sleeves 2, and the length of the sleeves 2 is determined according to the distance between test base points. The middle part of each sphere 1 is respectively drilled with a threaded hole 6 communicating with the casing 2, and the inside of each sphere 1 is pasted with fiber Bragg gratings 5 along six different directions, and eac...
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