In situ and induced stresses

2000 ◽  
pp. 78-95
Keyword(s):  
Induced Stresses

Study on Support of Roadways in Fractured Rock Mass under Mining-Induced Stresses

2013 ◽  
Vol 807-809 ◽  
pp. 2332-2339
Author(s):  
Qiang Wang ◽  
Jin Yu Chen
Keyword(s):  
Rock Mass ◽  
Abutment Pressure ◽  
Underground Mining ◽  
Fractured Rock ◽  
The State ◽  
In Situ Monitoring ◽  
Initial Stresses ◽  
Induced Stresses ◽  
The Stability

One of the difficult issues in underground mining is the ground control of roadway subject to mining induced stresses. As a longwall face advances, the state of initial stresses dramatically changes. Accordingly, lateral abutment pressure forms on the pillar and frontal abutment pressure on the roof and lateral sides of the roadway. These pressures will lead to severe deformation and deterioration of the rock mass surrounding the entries. In this paper, a systemic study on this issue is proposed using the combination of numerical modeling and in-situ monitoring which was carried out at a coal mine in the Lu.An Group, China. The condition of stress redistribution caused by mining-induced stresses and the state of the surrounding rock mass of the roadway situated in front the work face are systematically investigated. Different patterns of support and reinforcement as well as their effects on the stability of the roadway are also presented.

In-Situ Sensor-Matrix to Determine Package-Induced Stresses

2011 ◽  
Vol 1 (11) ◽  
pp. 1677-1684 ◽  
Author(s):  
Christian Djelassi ◽  
Thomas Aichinger ◽  
Michael Glavanovics ◽  
Manfred Kaltenbacher
Keyword(s):  
Induced Stresses ◽  
In Situ Sensor

Drying-induced stresses before solidification in colloidal dispersions: in situ measurements

Soft Matter ◽  
2019 ◽  
Vol 15 (13) ◽  
pp. 2768-2781 ◽  
Author(s):  
Anne Bouchaudy ◽  
Jean-Baptiste Salmon
Keyword(s):  
Complex Fluids ◽  
Colloidal Dispersions ◽  
In Situ Measurements ◽  
Continuous Measurements ◽  
Induced Stresses

We report an original setup that enables continuous measurements of stresses induced by the drying of confined drops of complex fluids.

Simulation of Sand Production with a Coupled Seepage-Deformation-Damage Model

2012 ◽  
Vol 524-527 ◽  
pp. 1569-1572
Author(s):  
Feng Sun ◽  
Bo Liu ◽  
Shifeng Xue
Keyword(s):  
Damage Model ◽  
Equation System ◽  
Quantitative Information ◽  
Oil Reservoir ◽  
Oil Sand ◽  
Sand Production ◽  
Proposed Model ◽  
Induced Stresses ◽  
Fully Coupled

The deformation of the oil sand matrix is an important issue given that in situ and well pumping induced stresses impact on the susceptibility of the oil reservoir to produce sand. Focusing on this problem, a fully coupled seepage-deformation-damage model is developed to simulate the enhanced sand production phenomena. Finite element method with explicit and sequential iterative algorithm is used to solve the coupled governing equation system. Simulation results relating perforation cavity propagation, sand production rate and cumulative sand production are presented. The study suggests that the proposed model may be used to generate quantitative information for predicting sand production and optimizing pressure drawdown.

Packer-Induced Stresses During Hydraulic Well Fracturing

1981 ◽  
Vol 103 (4) ◽  
pp. 336-343 ◽  
Author(s):  
W. E. Warren
Keyword(s):  
Hydraulic Fracturing ◽  
Oil And Gas ◽  
Circular Cylindrical Shell ◽  
Elastic Solid ◽  
Gas Recovery ◽  
Linear Elastic ◽  
Analytical Approximations ◽  
Induced Stresses ◽  
The Difference

Well bore stresses induced by inflatable packers during hydraulic fracturing operations are investigated. The geologic formation is modeled as an unbounded homogeneous isotropic linear elastic solid containing an infinitely long circular cavity, while the packer is modeled as a semi-infinite thin-walled circular cylindrical shell. For given packer properties, these induced stresses are shown to depend on the difference between packer pressure and fracturing pressure and can become significant. Typical numerical results are obtained and presented graphically. Analytical approximations for the maximum values of these stresses are also presented. While these effects are of no importance in the usual application of hydraulic fracturing to enhance oil and gas recovery, they are crucial in attempts to estimate in-situ stresses from hydraulic fracturing pressure data.

In-Situ and Induced Stresses in the Development of Unconventional Resources

2014 ◽  
Author(s):  
Hongxue Han ◽  
Shannon Marie Higgins-Borchardt ◽  
Domingo Mata ◽  
Veronica Monica Gonzales
Keyword(s):  
Unconventional Resources ◽  
Induced Stresses
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