Identification method of potential seepage channel of rock slope based on micro-seismic monitoring
A technology of microseismic monitoring and seepage channel, applied in the field of geotechnical engineering
Inactive Publication Date: 2018-12-14
SICHUAN UNIV
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[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and to provide a method for identifying potential seepage channels of rock slopes based on microseismic monitoring, so as to more accurately and effectively identify potential seepage channels in rock slopes during excavation and other construction processes. The seepage channel provides an important basis for solving the stability of rock slopes, so as to better guide the safe construction of rock slopes
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Embodiment 1
[0038] In this embodiment, taking the left bank slope of a large hydropower station as an example, the method for identifying potential seepage channels of rock slopes based on microseismic monitoring is specifically described. The schematic diagram of the identification of potential seepage channels for rock slopes in the present invention is shown in figure 1 .
[0039] The microseismic monitoring system adopted in this embodiment is the ESG microseismic monitoring system (ESG Corporation of Canada). host part of the system). Each acceleration sensor is connected to the Paladin digital signal acquisition system through cables, and the Paladin digital signal acquisition system is connected to the Hyperion digital signal processing system through a network cable. connect. The sensitivity of the sensor is 30V / g, and the frequency response range is 50Hz~5kHz. The sampling frequency of the Paladin digital signal acquisition system is 20kHz. The sensor converts the received stre...
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The invention provides an identification method of a potential seepage channel of a rock slope based on micro-seismic monitoring. The identification method comprises the following steps that (1) a monitoring area is delineated, and a sensor is arranged and blast holes are formed; (2) blasting is carried out in the blast holes correspondingly at different time points, taking-off moments of elasticwaves generated by blasting are recorded, and an average equivalent wave speed of a rock body is calculated; and (3) the monitoring area is monitored through a micro-seismic monitoring system, a position of seismic focus and the moment of occurrence of micro-seismic of a micro-seismic incident generated in the monitoring area are measured, a spatial distribution map of the position of the seismicfocus is manufactured, when the position of the seismic focus of the micro-seismic incident aggregates in one or part of local areas of the monitoring area and is distributed in a stripped shape or aface shape, the potential seepage channel exists in the corresponding local area. According to the identification method of the potential seepage channel of the rock slope based on the micro-seismic monitoring, the potential seepage channel occurs in the excavation and other construction processes of the rock slope can be identified more accurately, an important basis is provided for solving the stability problem of the rock slope, and direction of the safe construction of the rock slope is better facilitated.
Description
technical field [0001] The invention belongs to the field of geotechnical engineering, in particular to a method for identifying potential seepage channels of rock slopes based on microseismic monitoring. Background technique [0002] Slopes refer to natural slopes or slopes formed by human activities. The prediction of slope instability has always been a difficult problem in the world, and the stability of slopes must be considered in engineering construction. Seepage refers to the flow of water or other fluids in porous or fractured media such as rock and soil. Groundwater is one of the important factors affecting slope stability. Slope seepage is a key issue in the study of slope stability. According to statistics, about 90% of natural and artificial slope failures are related to groundwater. Therefore, close attention should be paid to the seepage of groundwater in the slope rock mass during engineering construction. [0003] For the seepage problem of slopes, scholar...
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Login to View More IPC IPC(8): G01V1/30
CPCG01V1/306G01V2210/642G01V2210/646
Inventor 徐奴文蒋雄戴峰周家文
Owner SICHUAN UNIV