Study on the stratum-grouting control according to the evolution of additional strain of shaft lining

Xia, Jianghai; Yu, Ge; Chang, Gladys

doi:10.1201/9780203022528-70

Cited by 4 publications

(6 citation statements)

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“…Once a circumferential microcrack appears in the shaft lining, it is on the verge of fracture. To avoid further destruction, the stratum grouting method is used to prevent the shaft lining from fracture as follows [11][12][13].…”

Section: Process Control During Stratum Grouting For Ensuring Thementioning

confidence: 99%

Measurement of Additional Strains in Shaft Lining Using Differential Resistance Sensing Technology

Guo-fan

Pei

Liang

2013

International Journal of Distributed Sensor Networks

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As is well known, shaft lining fracture is the main disaster resulting in a large amount of fatalities and property loss. Thus, the additional strain is a key parameter to evaluate the safety condition of existing shaft linings. In this study, a new type of safety monitoring system based on differential resistance sensing technology is developed to measure the additional strain in shaft linings. In this paper, the theatrical study, the working principle, and the function of the newly developed monitoring system are fully presented. To investigate the reliability and effectiveness of the monitoring system, the differential resistance sensors are used to measure the horizontal and vertical strains at different elevations in a shaft lining during reinforcing the fracture inside the shaft lining. It can be found that from the test results the monitoring system based on differential resistance sensing technology can measure the deformation of the existing wall lining during stratum grouting. Therefore, it can be concluded that the newly developed monitoring system is significant for fracture warning and reinforcement engineering.

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Section: Process Control During Stratum Grouting For Ensuring Thementioning

confidence: 99%

Measurement of Additional Strains in Shaft Lining Using Differential Resistance Sensing Technology

Guo-fan

Pei

Liang

2013

International Journal of Distributed Sensor Networks

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“…After the destruction of the shaft lining more or less still bear the additional force, called residual additional force. Through the grouting strengthening and improvement the nature of the aquifer, it not only inhibits and weakens the additional force generation and growth, but also grouting process will slow release the stress of the vertical shaft [4][5].…”

Section: The Application Of Automatic Remote Shaft Lining Monitoring ...mentioning

confidence: 99%

Application of Shaft Lining Monitoring System in the Deep and Thick Overburden

Zhang

2012

AMR

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The vertical additional force could make the shaft lining in deep topsoil fracture. The force is caused by the bottom aquifer drainage settlement. In order to analyze the mechanical state of shaft, a shaft lining automatic monitoring system is built. The overall safety can be valuated by it. When monitoring data show that the shaft lining will be fractured, management measures can be timely taken to prevent more damage. In the process of ground grouting treatment to prevent shaft fracture, the monitoring data can be as the shaft lining stability and grouting parameters adjustment basis, to ensure safety and grouting reinforcement effect.

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“…Computational Examples Computational Parameters. Based on the simulation experiments in [2], the stress calculation of a double layer shaft in special strata was conducted using the above method.…”

Section: Basic Assumptions and Conditionsmentioning

confidence: 99%

“…The experimental results of the shaft indicate that [2], there is approximately H=6×2r 2 =53.4m； for α，β, the values at the time when the shaft lining ruptured during the experiment are used α=-2.45×10 -4 MPa/m,β=0.064MPa， (26) and at this time, there is k=0.0118.…”

Section: Basic Assumptions and Conditionsmentioning

confidence: 99%

“…From several years of research, the vertical additional force has been found the cause of the lining rupture problems in East China [1][2][3][4], therefore, in special strata, the external loads of the shaft mainly includes the earth pressure and the additional force on the outside lateral surface, and the counter-force of the bedrock at the bottom of the shaft.…”

Section: Introductionmentioning

confidence: 99%

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Stress Calculation for a Double Layer Shaft in Special Strata

Zhou

2011

AMR

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A stress calculation method has been established for the double layer shaft in special strata. After some simplifications of the mechanical model, the problem was broke down into three subproblems, and a Saint-Venant solution was obtained by solving and adding up each subproblem. An example for certain double layer shaft was presented, and the stress results were compared with the single layer shaft under the same conditions. The fourth strength theory was applied to study the safety of the shafts, and the results show that, the safety for the inner layer of the double layer shaft is better than the single layer shaft, while the safety of the outer layer is relatively worse. We indicate that the application of this double layer shaft is advantageous for the safety production of the mine, and the outer layer of this shaft is the fragile area that needs to be repaired primarily.

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Study on the stratum-grouting control according to the evolution of additional strain of shaft lining

Cited by 4 publications

References 0 publications

Measurement of Additional Strains in Shaft Lining Using Differential Resistance Sensing Technology

Measurement of Additional Strains in Shaft Lining Using Differential Resistance Sensing Technology

Application of Shaft Lining Monitoring System in the Deep and Thick Overburden

Stress Calculation for a Double Layer Shaft in Special Strata

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