Oscillation testing system for determining permeability coefficient tensor in fractured rock mass
A technology of permeability coefficient and oscillation test, applied in permeability/surface area analysis, measurement device, suspension and porous material analysis, etc., to achieve the effect of convenient storage, small size and light weight
Inactive Publication Date: 2012-12-19
HOHAI UNIV
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[0004] When a borehole exposes one or more fractures, the impact of the fracture on the water level oscillation in the borehole is related to the geometric characteristics of the fracture (occurrence, trace length, gap width, etc.), and the existing oscillation test system cannot handle this situation
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[0042] Such as figure 1 An oscillation test system for determining the permeability coefficient tensor of fractured rock mass is shown, including: downhole borehole image recognition and orientation system, cable counting drawworks system, test excitation system, sensor system, PDA data acquisition system and computer; The output / input ends of the borehole image recognition and orientation system, the cable counting winch system, the test excitation system and the sensor system are respectively connected with the input / output ends of the PDA data acquisition system, and the PDA data acquisition system is connected with the computer; After the data obtained by the cable counting winch system and the downhole drilling image recognition and orientation system are transmitted to the PDA data acquisition system, the PDA data acquisition system controls the test excitation system, and the sensor system transmits the measured medium pressure and temperature data to the PDA data acquis...
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The invention discloses an oscillation testing system for determining permeability coefficient tensors in fractured rock mass. The testing system comprises an underground drilling image recognition orientating system, a cable counting winch system, a test triggering system, a sensor system, a PDA (personal digital assistant) data acquisition system and a computer, wherein output ends / input ends of the underground drilling image recognition orientating system, the cable counting winch system, the test triggering system and the sensor system are respectively connected with the input end / output end of the PDA data acquisition system correspondingly. With the adoption of the system, fracture images and position and depth data can be obtained through the underground drilling image recognition orientating system and the cable counting winch system, thereby the fracture occurrence of fractured rock mass is obtained, subsequently a water head in a testing section which is sealed by using a rubber expansion plug and is selected from a drilling hole is triggered by using the testing triggering system, so as to generate oscillation change, signals acquired by the sensor are transmitted to the PDA data acquisition system and the change regulation of the water head along with the time is recorded in real time; and by using fracture medium hydrodynamics and oscillation testing principles, the testing can be accomplished rapidly, the data can be processed, and the permeability coefficient tensors of the fractured rock mass are obtained.
Description
technical field [0001] The invention relates to an oscillation test system in the field of hydrogeology, in particular to an oscillation test system and a test method for determining the permeability coefficient tensor of a fractured rock mass. Background technique [0002] The permeability of rock mass is involved in many scientific researches in engineering construction and subject areas, for example, water conservancy, civil engineering construction, oil extraction and underground storage, nuclear waste treatment, environmental pollution, etc. are all related to the permeability of rock mass. In particular, the permeability of heterogeneous anisotropic fractured rock mass is an important parameter that must be mastered in the design, construction, and operation of dam foundations, slopes, and tunnels. At the same time, to study the interaction of engineering structures, foundations and groundwater, as well as the coupling effects of stress field, temperature field, seepag...
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IPC IPC(8): G01N15/08
Inventor 周志芳王锦国黄勇赵燕容吴蓉傅志敏窦智崔子腾
Owner HOHAI UNIV