AU2015208554A1 - Rock acoustic wave detection transducer - Google Patents
Rock acoustic wave detection transducer Download PDFInfo
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- AU2015208554A1 AU2015208554A1 AU2015208554A AU2015208554A AU2015208554A1 AU 2015208554 A1 AU2015208554 A1 AU 2015208554A1 AU 2015208554 A AU2015208554 A AU 2015208554A AU 2015208554 A AU2015208554 A AU 2015208554A AU 2015208554 A1 AU2015208554 A1 AU 2015208554A1
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- 238000001514 detection method Methods 0.000 title claims abstract description 72
- 239000011435 rock Substances 0.000 title claims abstract description 38
- 239000002184 metal Substances 0.000 claims description 32
- 239000000919 ceramic Substances 0.000 claims description 13
- 239000004576 sand Substances 0.000 claims description 6
- 238000012360 testing method Methods 0.000 abstract description 34
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 230000008878 coupling Effects 0.000 abstract description 13
- 238000010168 coupling process Methods 0.000 abstract description 13
- 238000005859 coupling reaction Methods 0.000 abstract description 13
- 239000007822 coupling agent Substances 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 4
- 238000005553 drilling Methods 0.000 abstract description 2
- 238000001228 spectrum Methods 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 description 13
- 238000005422 blasting Methods 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 210000002445 nipple Anatomy 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/043—Analysing solids in the interior, e.g. by shear waves
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/07—Analysing solids by measuring propagation velocity or propagation time of acoustic waves
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/28—Details, e.g. general constructional or apparatus details providing acoustic coupling, e.g. water
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/023—Solids
- G01N2291/0232—Glass, ceramics, concrete or stone
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/048—Transmission, i.e. analysed material between transmitter and receiver
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/10—Number of transducers
- G01N2291/103—Number of transducers one emitter, two or more receivers
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- Physics & Mathematics (AREA)
- Biochemistry (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Geophysics And Detection Of Objects (AREA)
Abstract
A rock acoustic wave detection transducer comprising a transmitting transducer (1), a receiving transducer (2), a rigid connecting pipe (3), testing rods (4), a hydraulic pump (8), and an acoustic wave collecting apparatus (9). The transmitting transducer (1) is connected to the receiving transducer (2) via the rigid connecting pipe (3). One testing rod (4) is connected to the top of the transmitting transducer (1). The transducer is advantageous in that: by means of direct contact between a telescopic hydraulic contact (12) and a hole-wall rock of a detection hole, obviated is the need to introduce a coupling agent, thus dry-hole detection for acoustic wave testing is implemented; unaffected by water supply for construction and the orientation and angle of drilling, adaptability to various detection conditions on site is allowed; coupling pressure is controlled by a hydraulic apparatus having a pressure gauge, and consistency of coupling conditions can be ensured. Because impacts of a coupling agent are excluded and consistency of the coupling conditions is ensured, use of the apparatus in an acoustic wave test not only allows for increased accuracy in interpreting a waveform jump-off point for acquisition of acoustic velocity data, but also allows for acquisition of data in terms of acoustic amplitude and spectrum.
Description
Specification An acoustic detection transducer for rock mass Technology field This invention relates to the field of water resources and hydropower technology and geotechnical engineering technology, and in particular, it is an acoustic detection transducer for rock mass to determine the influence scope induced by rock excavation blasting. Background technology During rock blasting for excavations, dynamic damage of the remaining rock masses will inevitably be generated while the excavated rock is fragmented under the blasting load; along with the formation of the new free surface, physical and mechanical properties of the remaining rock masses will be disturbed and degrade, and then the so called excavation induced disturbance zone or excavation induced damage zone is formed. The excavation induced disturbance zone or excavation induced damage zone will cause adverse impacts on the safety of the remaining rock masses and the engineering constructions. Construction safety can be ensured and the engineering cost can be reduced by accurate discrimination of the influence scope to determine the excavation induced disturbance zone or excavation induced damage zone. Acoustic test is easy to conduct and the testing result is easy to read; as a result, acoustic test is widely used in the field of water resources and hydropower technology and geotechnical engineering technology. In particular, the most commonly used method is to introduce change ratio of P-wave velocity 1 before and after blasting to determine the influence scope induced by rock excavation blasting. During traditional acoustic tests, water is usually injected into the test hole as a coupling agent. Acoustic signal generated by the transmitting transducer will propagate through water, and then spread to rock mass, and then spread to water again, and finally received by the receiving transducer. In general, in order to evaluate the influence scope induced by excavation blasting, performance of the rock mass is required to be in natural state. In fact, because most of the test holes are above ground water, and there is no water in the test holes before testing. However, water is needed to fill the test hole during the test. As a result, moisture content of the rock mass is changed, and the corresponding result will be different with that in natural state. Secondly, the injected water will weaken the structural plane effect of rock mass, and the propagation of acoustic wave will be affected. Thirdly, as propagation of acoustic wave is dependent on water coupling, both efficiency and precision of the test will be affected when the rock mass is relatively fragmented and water seepage is serious in the test hole. In addition, in the process of actual implementation, in order to facilitate the movement of the transducer, the diameter of the transducer is always less than the diameter of the test hole. As a result, during the movement of the transducer, position deviation of the transducer is easy to occur and the coupling condition will change. As a consequence, result of the test will be affected because of the change of the propagation path of the acoustic wave. 2 At present, there are also dry hole transducers with no need to inject water into the test hole. For these dry hole transducers, there are flexible bags made of impermeable material (such as rubber) around it, coupling of transducer and wall of test hole is achieved by injecting pressurized water into the bag and making it expanding. However, there are still disadvantages, such as the bag is easy to be abrasive, and the pressure is not easy to control to keep a constant coupling condition, that will have influences on the implementation process of the test and results of the test. In addition, compared to the traditional transducers, problems of change of the coupling condition induced by position deviation during the movement of the transducer cannot be improved by these dry hole transducers. Contents of the invention According to the existing technology mentioned above, focus on acoustic detection of the influence scope induced by rock excavation blasting, an acoustic detection transducer for rock mass is raised up by this invention to solve the problems due to employ water as coupling agent during acoustic detection, and to remedy the defects of the existing dry hole transducers. This invention is suitable for both single hole and cross holes acoustic detection. Characteristics of an acoustic detection transducer for rock mass are: including transmitting transducer, receiving transducer, rigid connection tube, measuring bar, hydraulic pump and acoustic wave acquisition equipment; the transmitting transducer mentioned above connects to the receiving transducer by the rigid connection tube, and the measuring bar is on the top of the transmitting 3 transducer, and the transmitting transducer connects to the hydraulic pump and the acoustic wave acquisition equipment by pipe and wire; both the transmitting transducer and the receiving transducer mentioned above are dry hole transducers, which include built-in piezoelectric ceramic, hydraulic contact terminal, and hydraulic rigid cushion block; tube wall of the rigid connection tube mentioned above is pierced, which can ensure the propagation distance of the acoustic wave are 6-7 times longer than the length of the tube. There is a metal shell around the dry hole transducer mentioned above, and there are hydraulic pipe for connecting the hydraulic pump and shield cable for connecting the acoustic wave acquisition equipment at the top of the metal shell mentioned above; the hydraulic contact terminal and the hydraulic rigid cushion block are connected together by two sets of symmetrical springs with the same length and stiffness factor inside the metal shell. Both the contacting outside surface between the hydraulic contact terminal and the wall of the acoustic detection hole, the contacting outside surface between the hydraulic rigid cushion block and the wall of the acoustic detection hole are cambered surface; and radius of curvature of both hydraulic contact terminal and hydraulic rigid cushion block should match to the radius of curvature of the wall of the acoustic detection hole. There is a rubber bag to keep sand off around the metal shell; one end of the rubber bag is fixed to the metal shell and another end of the rubber bag is fixed to the hydraulic rigid cushion block; the length of the rubber bag should match to the 4 moving length of the hydraulic rigid cushion block. Or characteristics of an acoustic detection transducer for rock mass are: including transmitting transducer, receiving transducer, measuring bar, hydraulic pump and acoustic wave acquisition equipment; there is a measuring bar on the top of the transmitting transducer, as well as the receiving transducer in another acoustic detection hole; both transmitting transducer and receiving transducer in another acoustic detection hole connect to the hydraulic pump and the acoustic wave acquisition equipment by pipe and wire; both the transmitting transducer and the receiving transducer mentioned above are dry hole transducers, which include built-in piezoelectric ceramic, hydraulic contact terminal, and hydraulic rigid cushion block. There is a metal shell around the dry hole transducer, and there are hydraulic pipe for connecting the hydraulic pump and shield cable for connecting the acoustic wave acquisition equipment at the top of the metal shell mentioned above; the hydraulic contact terminal and the hydraulic rigid cushion block are connected together by two sets of symmetrical springs with the same length and stiffness factor inside the metal shell. Both the contacting outside surface between the hydraulic contact terminal and the wall of the acoustic detection hole, the contacting outside surface between the hydraulic rigid cushion block and the wall of the acoustic detection hole are cambered surface; and radius of curvature of both hydraulic contact terminal and hydraulic rigid cushion block should match to the radius of curvature of the wall of 5 the acoustic detection hole. There is a rubber bag to keep sand off around the metal shell; one end of the rubber bag is fixed to the metal shell and another end of the rubber bag is fixed to the hydraulic rigid cushion block; the length of the rubber bag should match to the moving length of the hydraulic rigid cushion block. Through the supercharging of the hydraulic pump 8 with a pressure gauge, the hydraulic contact terminal 12 of the dry hole transducers 1,2 can contact closely with the wall of the acoustic detection hole 10; through depressurization of hydraulic pump 8, the springs 14 will contract automatically, the hydraulic contact terminal 12 of the dry hole transducers 1,2 will space out with the wall of the acoustic detection hole 10 and then get to the testing of the next point. Meanwhile, by coupling pressure controlling through a pressure gauge, consistent coupling condition can be ensured when testing at different times. The advantages of an acoustic detection transducer for rock mass proposed by this invention are listed below: achieve a dry hole detection for acoustic tests through the direct contact between the telescopic hydraulic contact terminal and the rock mass on the detection hole wall, and no coupling agent is needed; not be affected by the construction water supply, drilling azimuth and angle, and can adapt to various testing conditions on-site; close contact of transducer between and wall of acoustic detection hole can be enhanced and consistent coupling condition can be ensured by coupling pressure controlling through hydraulic equipment with a pressure gauge. Because the influence of coupling agent is eliminated and 6 consistent coupling condition is ensured, in addition to achieving a more accurate take-off time of the acoustic waveform and getting the corresponding acoustic velocity data, data such as acoustic wave amplitude and frequency spectrum can also be got by using the acoustic detection transducer for rock mass proposed by this invention during acoustic tests. Explanation of accompanying diagrams Figure 1 is the structural representation when conducting single hole acoustic detection with the device proposed by this invention. Figure 2 is the structural representation when conducting cross holes acoustic detection with the device proposed by this invention. Figure 3 is the structural representation of the dry hole transducer. Figure 4 is the A-A section view of Figure 3. Figure 5 is the structural representation of rigid connection tube. Figure 6 is the B-B section view of Figure 5. Figure 7 is the schematic diagram of relative positions of the existing transducer and the transducer proposed by this invention in the acoustic detection hole. In the above figures, 1 is transmitting transducer, 2 is receiving transducer, 3 is rigid connection tube, 4 is measuring bar, 5 is hydraulic rigid cushion block, 6 is hydraulic pipe, 7 is shield cable, 8 is hydraulic pump, 9 is acoustic wave acquisition equipment, 10 is acoustic detection hole, 11 is metal shell, 12 is hydraulic contact terminal, 13 is piezoelectric ceramic, 14 is spring, 15 is the 7 existing transducer, 16 is water, 17 is rubber bag, and 18 is connecting bolt. Specific implementation way Embodiment No.1 Further instructions for this invention are given below by combining with accompanying diagrams. As shown in Figure 1, 3, 4, 5, 6, an acoustic detection transducer for rock mass includes transmitting transducer 1, receiving transducer 2, rigid connection tube 3, measuring bar 4, hydraulic pump 8 and acoustic wave acquisition equipment 9; the transmitting transducer 1 mentioned above connects to the receiving transducer 2 by the rigid connection tube 3, and the measuring bar 4 is on the top of the transmitting transducer 1, and the transmitting transducer 1 connects to the hydraulic pump 8 and the acoustic wave acquisition equipment 9 by pipe and wire; both the transmitting transducer 1 and the receiving transducer 2 mentioned above are dry hole transducers, which include built-in piezoelectric ceramic 13, hydraulic contact terminal 12, and hydraulic rigid cushion block 5. Piezoelectric ceramic 13 in transmitting transducer 1 transmits acoustic wave, and piezoelectric ceramic 13 in receiving transducer 2 receives acoustic wave. The dry hole transducer includes metal shell 11, hydraulic contact terminal 12, piezoelectric ceramic 13 and hydraulic rigid cushion block 5; there are hydraulic pipe 6 for connecting the hydraulic pump 8 and shield cable 7 for connecting the acoustic wave acquisition equipment 9 at the top of the metal shell 11 mentioned above; there are thread nipples for connecting the rigid connection tube 3 or the measuring bar 4 set at both ends of the dry hole transducer if necessary. The 8 hydraulic contact terminal 12 and the hydraulic rigid cushion block 5 are connected together by two sets of symmetrical springs 14 with the same length and stiffness factor inside the metal shell 11. The contacting outside surface between the hydraulic contact terminal 12 and the wall of the acoustic detection hole 10 is cambered surface. And the contacting outside surface between the hydraulic rigid cushion block 5 and the wall of the acoustic detection hole 10 is also cambered surface. There is a rubber bag 17 to keep sand off around the metal shell 11; one end of the rubber bag 17 is fixed to the metal shell 11 and another end of the rubber bag 17 is fixed to the hydraulic rigid cushion block 5; the length of the rubber bag 17 should match to the moving length of the hydraulic rigid cushion block 5. The rigid connection tube 3 is made of metal, with a tube diameter of 2-3 cm and a tube wall thickness of 3-4 mm. Tube wall of the rigid connection tube 3 mentioned above is pierced, which can ensure the propagation distance of the acoustic wave are 6-7 times longer than the length of the tube. There are bolts at both ends of the rigid connection tube 3 to connect with the transmitting transducer 1 or the receiving transducer 2. The length of the rigid connection tube 3 should be chosen according to the need in a specific test. The measuring bar 4 is made of rigid material, and there are connecting bolts at both ends of the bar for connecting together or splitting. Length of the is measuring bar is 1 m, 2 m, 5 m, etc, and there are scales with a minimum scale for 10 cm on the bar. 9 The new acoustic detection transducer for rock mass mentioned above is adopted in the detection of the influence scope induced by rock excavation blasting for high slope of a hydropower project. There are three acoustic detection holes that are 1.0 m above the packway, and the acoustic detection holes are named SB 1, SB2, SB3, respectively. The holes form a regular triangle with 1-meter-long sides; the diameter of the holes is 110 mm, and the depth of the holes is 10 m. The slope ratio is 1:0.3, and the holes are perpendicular to the surface of the slope. Single hole acoustic detection is conducted in hole SB 1. Step No.1. Choose the suitable type for transducer and hydraulic rigid cushion block. The specific requirements are listed as follows: width of the transducer is 80 mm, and one transmitting transducer and two receiving transducers are needed; curvature radius of contacting outside surface between the hydraulic contact terminal and the wall of the acoustic detection hole is 110 mm; curvature radius of contacting outside surface between the hydraulic rigid cushion block and the wall of the acoustic detection hole is 110 mm. Step No.2. Fix the transducers on the two ends of the rigid connection tube. From up to down, transmitting transducer, receiving transducer, and another receiving transducer occurs in turn. Length of the rigid connection tube between two receiving transducers is 15 cm; length of the rigid connection tube between receiving transducer and transmitting transducer is 25 cm. Step No.3. Connect the measuring bars. Fix the connected measuring bars on the top of the transmitting transducer; send the connected measuring bars and 10 transducers to the bottom of hole SB 1. Length of each measuring bar is 5 m, 2 m, 2 m, 2 m, respectively. Step No.4. Connect the hydraulic pipe and the shield cable. Connect the hydraulic pipes and shield cables on the three transducers to the hydraulic pump and corresponding interfaces on the acoustic wave acquisition equipment, respectively; and then turn on the acoustic wave acquisition equipment. Step No.5. Acquire testing data. Firstly, record the depth of the transducer. Secondly, supercharge by hydraulic pump, and stop supercharging when stable acoustic wave is presented on the acoustic wave acquisition equipment; save the acoustic waveform and record the current hydraulic pressure. Thirdly, depressurize by hydraulic pump, and then raise the measuring bar 20 cm to the next test position. Fourthly, slowly supercharge by hydraulic pump to the pressure recorded before, and then stop supercharging and save the acoustic waveform; depressurize by hydraulic pump and raise the measuring bar to the next test position. Repeat the above steps until the whole detection is done. Embodiment No.1 Further instructions for this invention are given below by combining with accompanying diagrams. As shown in Figure 2, 3, 4, 5, 6, an acoustic detection transducer for rock mass includes transmitting transducer 1, receiving transducer 2, measuring bar 4, hydraulic pump 8 and acoustic wave acquisition equipment 9; there is a measuring bar 4 on the top of the transmitting transducer 1, as well as the receiving transducer 2 in another acoustic detection hole 10; the transmitting 11 transducer 1 connects to the hydraulic pump 8 and the acoustic wave acquisition equipment 9 by pipe and wire, and the receiving transducer 2 in another acoustic detection hole 10 connects to the hydraulic pump 8 and the acoustic wave acquisition equipment 9 by pipe and wire; both the transmitting transducer 1 and the receiving transducer 2 mentioned above are dry hole transducers, which include built-in piezoelectric ceramic 13, hydraulic contact terminal 12, and hydraulic rigid cushion block 5. Piezoelectric ceramic 13 in transmitting transducer 1 transmits acoustic wave, and piezoelectric ceramic 13 in receiving transducer 2 receives acoustic wave. The dry hole transducer includes metal shell 11, hydraulic contact terminal 12, piezoelectric ceramic 13 and hydraulic rigid cushion block 5; there are hydraulic pipe 6 for connecting the hydraulic pump 8 and shield cable 7 for connecting the acoustic wave acquisition equipment 9 at the top of the metal shell 11 mentioned above; there are thread nipples for connecting the rigid connection tube 3 or the measuring bar 4 set at both ends of the dry hole transducer if necessary. The hydraulic contact terminal 12 and hydraulic rigid cushion block 5 are connected together by two sets of symmetrical springs 14 with the same length and stiffness factor inside the metal shell 11. The contacting outside surface between the hydraulic contact terminal 12 and the wall of the acoustic detection hole 10 is cambered surface. And the contacting outside surface between the hydraulic rigid cushion block 5 and the wall of the acoustic detection hole 10 is also cambered surface. 12 There is a rubber bag 17 to keep sand off around the metal shell 11; one end of the rubber bag 17 is fixed to the metal shell 11 and another end of the rubber bag 17 is fixed to the hydraulic rigid cushion block 5; the length of the rubber bag 17 should match to the moving length of the hydraulic rigid cushion block 5. The measuring bar 4 is made of rigid material, and there are connecting bolts at both ends of the bar for connecting together or splitting. Length of the is measuring bar is 1 m, 2 m, 5 m, etc, and there are scales with a minimum scale for 10 cm on the bar. The new acoustic detection transducer for rock mass mentioned above is adopted in the detection of the influence scope induced by rock excavation blasting for high slope of a hydropower project. There are three acoustic detection holes that are 1.0 m above the packway, and the acoustic detection holes are named SB 1, SB2, SB3, respectively. The holes form a regular triangle with 1-meter-long sides; the diameter of the holes is 110 mm, and the depth of the holes is 10 m. The slope ratio is 1:0.3, and the holes are perpendicular to the surface of the slope. Cross holes acoustic detection is conducted in hole SB 1 and hole SB2. Step No.1. Choose the suitable type for transducer and hydraulic rigid cushion block. The specific requirements are listed as follows: width of the transducer is 80 mm, and one transmitting transducer and one receiving transducer are needed; curvature radius of contacting outside surface between the hydraulic contact terminal and the wall of the acoustic detection hole is 110 mm; curvature radius of contacting outside surface between the hydraulic rigid cushion block and the wall 13 of the acoustic detection hole is 110 mm. Step No.2. Connect the measuring bars. Fix the connected measuring bars on the top of both the transmitting transducer and the receiving transducer; send the connected measuring bars and transducers to the bottom of hole SB 1 and hole SB2. Length of each measuring bar is 5 m, 2 m, 2 m, 2 m, respectively. Step No.3. Connect the hydraulic pipe and the shield cable. Connect the hydraulic pipes and shield cables on the two transducers to the hydraulic pump and corresponding interfaces on the acoustic wave acquisition equipment, respectively; and then turn on the acoustic wave acquisition equipment. Step No.4. Acquire testing data. Firstly, record the depth of the two transducers. Secondly, supercharge by hydraulic pump, and stop supercharging when stable acoustic wave is presented on the acoustic wave acquisition equipment; save the acoustic waveform and record the current hydraulic pressure. Thirdly, depressurize by hydraulic pump, and then raise the two measuring bars 20 cm to the next test position at the same time. Fourthly, slowly supercharge by hydraulic pump to the pressure recorded before, and then stop supercharging and save the acoustic waveform; depressurize by hydraulic pump and raise the two measuring bars to the next test position at the same time. Repeat the above steps until the whole detection is done. 14
Claims (8)
1. characteristics of an acoustic detection transducer for rock mass are: including transmitting transducer(l), receiving transducer( 2 ), rigid connection tube(3), measuring bar(4), hydraulic pump( 8 ) and acoustic wave acquisition equipment( 9 ); the transmitting transducer(l) mentioned above connects to the receiving transducer( 2 ) by the rigid connection tube(3), and the measuring bar(4) is on the top of the transmitting transducer(l), and the transmitting transducer(l) connects to the hydraulic pump( 8 ) and acoustic wave acquisition equipment( 9 ) by pipe and wire; both the transmitting transducer(l) and the receiving transducer( 2 ) mentioned above are dry hole transducers, which include built-in piezoelectric ceramic(1 3 ), hydraulic contact terminal(1 2 ), and hydraulic rigid cushion block(5); tube wall of the rigid connection tube(3) mentioned above is pierced, which can ensure the propagation distance of the acoustic wave are 6-7 times longer than the length of the tube.
2. characteristics of an acoustic detection transducer for rock mass as mentioned in Claim 1 are: there is a metal shell(ll) around the dry hole transducer, and there are hydraulic pipe( 6 ) for connecting the hydraulic pump( 8 ) and the shield cable(7) for connecting the acoustic wave acquisition equipment( 9 ) at the top of the metal shell(ll) mentioned above; the hydraulic contact terminal(1 2 ) and the hydraulic rigid cushion block(5) are connected together by two sets of symmetrical springs(1 4 ) with the same length and stiffness factor inside the metal shell(ll).
3. characteristics of an acoustic detection transducer for rock mass as 1 mentioned in Claim 1 are: both the contacting outside surface between the hydraulic contact terminal(1 2 ) and the wall of the acoustic detection hole(1O), the contacting outside surface between the hydraulic rigid cushion block(5) and the wall of the acoustic detection hole(1O) are cambered surface; and radius of curvature of both hydraulic contact terminal(1 2 ) and hydraulic rigid cushion block(5) should match to the radius of curvature of the wall of the acoustic detection hole(1O).
4. characteristics of an acoustic detection transducer for rock mass as mentioned in Claim 1 are: there is a rubber bag(17) to keep sand off around the metal shell(ll); one end of the rubber bag(17) is fixed to the metal shell(ll) and another end of the rubber bag(17) is fixed to the hydraulic rigid cushion block(5); the length of the rubber bag(17) should match to the moving length of the hydraulic rigid cushion block(5).
5. characteristics of an acoustic detection transducer for rock mass are: including transmitting transducer(1), receiving transducer( 2 ), measuring bar(4), hydraulic pump( 8 ) and acoustic wave acquisition equipment( 9 ); there is a measuring bar(4) on the top of the transmitting transducer(l), as well as the receiving transducer( 2 ) in another acoustic detection hole(1O); both the transmitting transducer(l) and the receiving transducer( 2 ) in another acoustic detection hole(1O) connect to the hydraulic pump( 8 ) and acoustic wave acquisition equipment( 9 ) by pipe and wire; both the transmitting transducer(l) and the receiving transducer( 2 ) mentioned above are dry hole transducers, which include built-in piezoelectric ceramic(1 3 ), hydraulic contact terminal(1 2 ), and hydraulic rigid cushion block(5). 2
6. characteristics of an acoustic detection transducer for rock mass as mentioned in Claim 5 are: there is a metal shell(ll) around the dry hole transducer, and there are hydraulic pipe( 6 ) for connecting the hydraulic pump( 8 ) and shield cable(7) for connecting acoustic wave acquisition equipment( 9 ) at the top of the metal shell(ll) mentioned above; the hydraulic contact terminal(1 2 ) and hydraulic rigid cushion block(5) are connected together by two sets of symmetrical springs(1 4 ) with the same length and stiffness factor inside the metal shell(ll).
7. characteristics of an acoustic detection transducer for rock mass as mentioned in Claim 5 are: both the contacting outside surface between the hydraulic contact terminal(1 2 ) and the wall of the acoustic detection hole(O), the contacting outside surface between the hydraulic rigid cushion block(5) and the wall of the acoustic detection hole(O) are cambered surface; and radius of curvature of both hydraulic contact terminal(1 2 ) and hydraulic rigid cushion block(5) should match to the radius of curvature of the wall of the acoustic detection hole(O).
8. characteristics of an acoustic detection transducer for rock mass as mentioned in Claim 5 are: there is a rubber bag(17) to keep sand off around the metal shell(ll); one end of the rubber bag(17) is fixed to the metal shell(ll) and another end of the rubber bag(17) is fixed to the hydraulic rigid cushion block(5); the length of the rubber bag(17) should match to the moving length of the hydraulic rigid cushion block(5). 3
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410031090.0 | 2014-01-22 | ||
| CN201410031090.0A CN103698398A (en) | 2014-01-22 | 2014-01-22 | Transducer for detecting rock mass acoustic wave |
| PCT/CN2015/070437 WO2015109954A1 (en) | 2014-01-22 | 2015-01-09 | Rock acoustic wave detection transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2015208554A1 true AU2015208554A1 (en) | 2015-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2015208554A Pending AU2015208554A1 (en) | 2014-01-22 | 2015-01-09 | Rock acoustic wave detection transducer |
| AU2015101608A Expired AU2015101608A4 (en) | 2014-01-22 | 2015-01-09 | Rock acoustic wave detection transducer |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2015101608A Expired AU2015101608A4 (en) | 2014-01-22 | 2015-01-09 | Rock acoustic wave detection transducer |
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| Country | Link |
|---|---|
| CN (1) | CN103698398A (en) |
| AU (2) | AU2015208554A1 (en) |
| WO (1) | WO2015109954A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103698398A (en) * | 2014-01-22 | 2014-04-02 | 武汉大学 | Transducer for detecting rock mass acoustic wave |
| CN104278983B (en) * | 2014-09-30 | 2017-05-10 | 中国电建集团西北勘测设计研究院有限公司 | Coupling device for sound-wave all-around testing dry hole probe |
| CN108802193A (en) * | 2018-03-30 | 2018-11-13 | 中国平煤神马能源化工集团有限责任公司 | A kind of detecting devices and detection method of Exploring Loose Rock Country in Tunnels |
| CN110700819B (en) * | 2019-10-12 | 2023-08-18 | 重庆市市政设计研究院 | Anhydrous drilling sound wave detection and pressurized water test integrated device |
| CN113899811B (en) * | 2021-09-29 | 2023-12-05 | 安徽理工大学 | Acoustic method test system for accumulated damage of rock mass of coal mine tunnel |
| CN114324601A (en) * | 2021-11-04 | 2022-04-12 | 武汉长盛工程检测技术开发有限公司 | Method and device for detecting pile hole rock depth and rock strength of foundation pile |
| CN117309206A (en) * | 2023-09-06 | 2023-12-29 | 山东大学 | Tunnel ground stress rapid testing device and method |
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| US4252210A (en) * | 1978-10-25 | 1981-02-24 | Sodich Ernest O | Methods of and apparatus for generating seismic waves |
| CN2085964U (en) * | 1991-01-23 | 1991-10-02 | 中国矿业大学 | Complete dry type coupled drilling probe assembly |
| US5265461A (en) * | 1991-03-19 | 1993-11-30 | Exxon Production Research Company | Apparatuses and methods for measuring ultrasonic velocities in materials |
| CN2103813U (en) * | 1991-10-18 | 1992-05-06 | 中国矿业大学 | Full-dry type small diameter single-hole ultrasonic probe |
| JP3396596B2 (en) * | 1997-05-21 | 2003-04-14 | 飛島建設株式会社 | Measuring method and measuring device for looseness and crack area of ground, bedrock, concrete structure, etc. |
| CN2414417Y (en) * | 2000-01-28 | 2001-01-10 | 石建梁 | Dry hole and waterstoma two-purpose sound wave test probe |
| CN1702294A (en) * | 2005-06-17 | 2005-11-30 | 中国石化集团胜利石油管理局测井公司 | Acoustic sonde of digital acoustic logging instrument |
| KR101123791B1 (en) * | 2007-07-24 | 2012-03-13 | 고려대학교 산학협력단 | Apparatus for measuring soil disturbance in soil sampler by using shear wave and Method of measuring the same |
| CN101782554B (en) * | 2010-02-26 | 2012-01-11 | 中国水电顾问集团华东勘测设计研究院 | Full-split single pore sound wave test device and debugging method thereof |
| CN201628703U (en) * | 2010-02-26 | 2010-11-10 | 中国水电顾问集团华东勘测设计研究院 | Hydraulically-coupling cross-hole acoustic wave test device |
| JP2012018071A (en) * | 2010-07-08 | 2012-01-26 | Kobe Steel Ltd | Inspection device for pipe internal surface |
| CN202731903U (en) * | 2012-07-23 | 2013-02-13 | 湘潭无线电有限责任公司 | One-emitter two-receiver well logging transducer of sound ranger |
| CN102830171B (en) * | 2012-08-03 | 2014-10-22 | 中国科学院地质与地球物理研究所 | Rock mass test piece ultrasonic testing device |
| CN103698398A (en) * | 2014-01-22 | 2014-04-02 | 武汉大学 | Transducer for detecting rock mass acoustic wave |
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2015
- 2015-01-09 AU AU2015208554A patent/AU2015208554A1/en active Pending
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- 2015-01-09 WO PCT/CN2015/070437 patent/WO2015109954A1/en active Application Filing
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| CN103698398A (en) | 2014-04-02 |
| AU2015101608A4 (en) | 2016-02-04 |
| WO2015109954A1 (en) | 2015-07-30 |
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