In-situ stress measurement technology and field application based on micro-optical imaging measurement method

The internal stresses in the continuous tungsten-fiber reinforced copper-matrix composite were examined by the Neutron stress measurement method. The Neutron diffraction apparatus ND1, which is abbreviated from the Neutron Diffraction system No.1 designed and manufactured by the National Nuclear Energy Agency in Indonesia (Badan Tenage Nuklir Nasional, BATAN), was used in the present study. The most common 3-axes measurement method with Hooke's equation was used to measure stresses in the both of tungsten-fiber and copper-matrix. The tungsten-fiber became the situation of heavy 110 priority orientation. The other hand, copper-matrix became the large crystal grain. Thermal stress alterations caused form low temperature cycling was measured by in-situ stress measurement method making use of a cryostat system. The thermal residual stresses of tungsten-fiber and copper-matrix in longitudinal direction were compressive and tensile state respectively. Results of in-situ thermal stress measurement were agreed with a calculated result of simple elastic theory qualitatively.

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In Situ Stress Measurement Method and its Application in Unconventional Oil and Gas Exploration and Development

Acta Geologica Sinica - English Edition ◽

10.1111/1755-6724.12462 ◽

2015 ◽

Vol 89 (2) ◽

pp. 685-686 ◽

Cited By ~ 3

Author(s):

SUN Dongsheng ◽

CHEN Qunce ◽

WANG Zhongxiu ◽

ZHAO Weihua ◽

LI Awei

Keyword(s):

Measurement Method ◽

Oil And Gas ◽

Stress Measurement ◽

In Situ Stress ◽

Oil And Gas Exploration ◽

Unconventional Oil ◽

In Situ Stress Measurement ◽

Unconventional Oil And Gas ◽

Exploration And Development

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In Situ Stress Measurement and Inversion in Deep Roadway

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.734-737.759 ◽

2013 ◽

Vol 734-737 ◽

pp. 759-763 ◽

Cited By ~ 1

Author(s):

Yong Li ◽

Yun Yi Zhang ◽

Ren Jie Gao ◽

Shuai Tao Xie

Keyword(s):

Field Measurement ◽

Stress Measurement ◽

Measurement Data ◽

Back Analysis ◽

In Situ Stress ◽

Deep Mine ◽

Accuracy Requirement ◽

Initial Stress Field ◽

In Situ Stress Measurement

Jixi mine area is one of the early mined areas in China and it's a typical deep mine. Because of large deformation of underground roadway and dynamic disasters occurred frequently in this mine, five measurement points of in-situ stress in this mine was measured and then analyzed with inversion. Based on these in-situ stress measurement data, numerical model of 3D in-situ stress back analysis was established. According to different stress fields, related analytical samples of neural network were given with FLAC program. Through the determination of hidden layers, hidden nodes and the setting of parameters, the network was optimized and trained. Then according to field measurement of in-situ stress, back analysis of initial stress field was conducted. Compared with field measurement, with accuracy requirement satisfied, it shows that the in-situ stress of rock mass obtained is basically reasonable. Meanwhile, it proves that the measurement of in-situ stress can provide deep mines with effective and rapid means, and also provide reliable data to optimization of deep roadway layout and supporting design.

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