CN105004662A - Method for testing contact rigidity of rock discontinuity structural plane, and apparatus thereof - Google Patents

Abstract

The invention discloses a method for testing the contact stiffness of a rock mass structural surface, which comprises the steps of: (1) selecting a test area; (2) installing a vibration sensor; (3) turning on the acquisition instrument so that it is in a sampling state; One side of the structural surface of the body is hammered, and by adjusting the hammering direction, the longitudinal wave and shear wave propagating along the direction of the vibration sensor connection are generated; (5) record through the acquisition instrument; (6) calculate the longitudinal wave velocity, shear wave velocity, longitudinal wave Time-consuming through the structural surface and shear wave passing through the structural surface; (7) Calculate the elastic modulus and Poisson's ratio of the complete rock mass; (8) Perform inversion analysis with the help of numerical methods, and establish a numerical model similar to the test area (9) Apply an impact load on one side of the numerical model, and obtain the contact stiffness of the structural surface in the test area by continuously adjusting the normal contact stiffness and tangential contact stiffness of the structural surface in the numerical model. Devices using the method are also provided.

Description

A method and device for testing the contact stiffness of a rock mass structural surface

technical field

The invention belongs to the technical field of geology and mechanics, and in particular relates to a method for testing the contact stiffness of a rock mass structural surface and a device using the method.

Background technique

There are a large number of structural planes such as faults, joints, and cleavages in the geological body. The mechanical properties of the above structural planes will directly affect the stability of the geological body and the potential failure mode of instability. The mechanical properties of the structural surface include the normal contact stiffness, tangential contact stiffness, cohesion, internal friction angle and tensile strength of the structural surface. Among the above-mentioned mechanical properties of the structural surface, the contact stiffness of the structural surface not only affects the static stress-strain relationship of the geological body, but also directly affects the dynamic mechanical behavior of the geological body, such as the propagation law of the stress wave in the geological body, the dynamic load of the geological body The law of damage evolution under the action of

At present, the testing and experimental techniques for structural surface cohesion, internal friction angle and tensile strength are relatively mature, such as in-situ shearing experiment, indoor direct shearing experiment, indoor triaxial experiment and indoor Brazilian splitting experiment, etc. However, there are few test methods and analysis techniques for the contact stiffness of the structural surface. Generally, the uniaxial compression test is used to complete the test of the normal contact stiffness, and the direct shear test is used to complete the test of the tangential contact stiffness. When testing the normal contact stiffness, first test the normal stiffness of the complete rock block, then test the normal stiffness of the rock mass with structural plane (the structural plane remains horizontal during the test), and finally calculate the normal contact of the structural plane according to the relevant formula stiffness. When testing the tangential contact stiffness, the structural surface is used as a direct shear surface, and by applying a tangential load to the complete part above and below the structural surface, observing the change law of the tangential displacement at the structural surface with the tangential force, and then calculating the structural surface Tangential contact stiffness.

The above method of testing the contact stiffness of the structural surface can only be done in the laboratory, so on-site sampling and specimen processing are required, the process is relatively complicated, the structural surface is greatly disturbed, and the influence of the original rock stress on the structural surface stiffness cannot be reflected. In addition, due to the limitation of experimental equipment, the size of the sample and structural surface to be tested is generally on the order of decimeters, and the contact stiffness of large structural surfaces cannot be measured. Finally, the stiffness value tested by the above method is the static stiffness of the structural surface. When the stiffness value of this test is used for dynamic problem analysis, there will be a large error.

Contents of the invention

The technical solution of the present invention is to overcome the deficiencies of the prior art and provide a method for testing the contact stiffness of the rock mass structural surface, which can directly measure and analyze the structural surface rock mass in the field, with high testing accuracy and simple testing procedures. It can reflect the influence of original rock stress on structural surface stiffness, and can measure the contact stiffness of large structural surfaces.

The technical solution of the present invention is: the method for this test rock mass structural surface contact stiffness, this method comprises the following steps:

(1) Select the rock mass with better structural surface as the test area, and remove the dust and loose broken bodies on the surface of the test area;

(2) Vibration sensors are installed on both sides with the rock mass structural surface as the symmetrical center, and each vibration sensor is kept on a straight line;

(3) Utilize the data line to connect the vibration sensor with the acquisition instrument, open the acquisition instrument to make it in the sampling state;

(4) Hammering is performed on one side of the structural surface of the rock mass, and by adjusting the direction of the hammering, the longitudinal wave and the transverse wave propagating along the direction of the vibration sensor connection line are generated;

(5) Utilize each vibration sensor to perceive the vibration signal generated by hammering, and record it through the acquisition instrument;

(6) According to the start-up time and distance of each vibration sensor, calculate the longitudinal wave velocity, shear wave velocity, time consumption of longitudinal wave passing through the structural surface, and time consumption of shear wave passing through the structural surface of the complete rock mass;

(7) Test the density of the complete rock mass where the test area is located, and calculate the elastic modulus and Poisson's ratio of the complete rock mass;

(8) Inversion analysis is carried out by means of numerical methods, and a numerical model similar to that of the test area is established. The density, elastic modulus and Poisson's ratio of the complete rock mass are all measured on site;

(9) Apply an impact load on one side of the numerical model, and obtain the different time consumption of the stress wave passing through the structural surface by continuously adjusting the normal contact stiffness and tangential contact stiffness of the structural surface in the numerical model. When the time consumption is the same as that of step (6), the normal contact stiffness and tangential contact stiffness at this time are the contact stiffness of the structural surface in the test area.

Also provided is a device using the method for testing the contact stiffness of a rock mass structural surface, which includes a hammering tool, several vibration sensors, an acquisition instrument, and a data processing unit;

The vibration sensor is configured to install on both sides with the rock mass structure plane as the symmetrical center, keep in a straight line, and sense the vibration signal generated by the hammering;

The acquisition instrument is configured to use the data line to connect with the vibration sensor to record the vibration signal generated by the hammer;

The hammering tool is configured to hammer on one side of the structural surface of the rock mass, and by adjusting the hammering direction, the longitudinal wave and the transverse wave propagating along the direction of the vibration sensor connection line are generated;

The data processing unit is configured to calculate the longitudinal wave velocity of the complete rock mass, the shear wave velocity, the time consumption of the longitudinal wave passing through the structural surface, and the time consumption of the shear wave passing through the structural surface; calculate the elastic modulus and Poisson's ratio of the complete rock mass; use the numerical method to inverse Perform analysis and establish a numerical model similar to the test area; constantly adjust the normal contact stiffness and tangential contact stiffness of the structural surface in the numerical model. When the time consumption of the structural surface is consistent, the normal contact stiffness and tangential contact stiffness at this time are the contact stiffness of the structural surface in the test area.

The present invention hammers the rock mass in two directions perpendicular to the structural surface and parallel to the structural surface on one side of the structural surface, so that the longitudinal waves and transverse waves propagating along the direction of the sensor connection line are respectively generated, and the sensors sensed by the acquisition instrument are captured. According to the distance between the sensors, calculate the longitudinal wave velocity, shear wave velocity, time consumption of longitudinal wave passing through the structural surface and time consumption of shear wave passing through the structural surface of the complete rock mass, according to the density of rock mass, longitudinal wave velocity and shear wave velocity Calculate the elastic modulus and Poisson's ratio of the complete rock mass, and use the numerical calculation method to analyze and calculate the time-consuming time for longitudinal waves and shear waves to pass through the structural surface. By continuously adjusting the normal contact stiffness and tangential contact stiffness of the structural surface in the numerical model, The longitudinal wave time consumption and shear wave time consumption obtained by numerical calculation are consistent with the calculated time consumption. The normal contact stiffness and tangential contact stiffness are the contact stiffness of the structural surface in the test area. Therefore, the contact stiffness of the test rock mass structural surface The method can directly measure and analyze structural surface rock mass in the field, has high test accuracy, simple testing procedure, can reflect the influence of original rock stress on structural surface stiffness, and can measure the contact stiffness of large structural surfaces.

Description of drawings

Fig. 1 shows the layout diagram of the single-structure surface hammering experiment system according to the present invention.

Fig. 2 shows the layout diagram of the double-structure surface hammering experiment system according to the present invention.

Fig. 3 shows a flowchart of a method for testing the contact stiffness of a rock mass structural surface according to the present invention.

Detailed ways

As can be seen from Fig. 3, the method for testing the contact stiffness of the rock mass structural surface comprises the following steps:

(1) Select the rock mass with better structural surface as the test area, and remove (using a brush, etc.) the dust and loose broken bodies on the surface of the test area;

(2) Vibration sensors are installed on both sides with the rock mass structural surface as the symmetrical center, and each vibration sensor is kept on a straight line;

(3) Utilize the data line to connect the vibration sensor with the acquisition instrument, open the acquisition instrument to make it in the sampling state;

(4) Hammering is performed on one side of the structural surface of the rock mass, and by adjusting the direction of the hammering, the longitudinal wave and the transverse wave propagating along the direction of the vibration sensor connection line are generated;

(5) Utilize each vibration sensor to perceive the vibration signal generated by hammering, and record it through the acquisition instrument;

(6) According to the start-up time and distance of each vibration sensor, calculate the longitudinal wave velocity, shear wave velocity, time consumption of longitudinal wave passing through the structural surface, and time consumption of shear wave passing through the structural surface of the complete rock mass;

(7) Test the density of the complete rock mass where the test area is located, and calculate the elastic modulus and Poisson's ratio of the complete rock mass;

(8) Inversion analysis is carried out by means of numerical methods, and a numerical model similar to that of the test area is established. The density, elastic modulus and Poisson's ratio of the complete rock mass are all measured on site;

(9) Apply an impact load on one side of the numerical model, and obtain the different time consumption of the stress wave passing through the structural surface by continuously adjusting the normal contact stiffness and tangential contact stiffness of the structural surface in the numerical model. When the time consumption is the same as that of step (6), the normal contact stiffness and tangential contact stiffness at this time are the contact stiffness of the structural surface in the test area.

In addition, the structural surface includes a dry structural surface without thickness and a structural surface with a weak interlayer.

In addition, the number of vibration sensors on each side of the structural surface is greater than or equal to 2, the distance between the sensors on the same side of the structural surface is greater than or equal to 50cm, and the distance from the sensors closest to the structural surface on both sides of the structural surface to the structural surface is less than or equal to 10cm.

In addition, the vibration sensor includes an acceleration sensor and a speed sensor, and the frequency response of the vibration sensor is greater than or equal to 1KHz.

In addition, the vibration sensor is installed to the rock mass through gypsum bonding, quick-setting cement bonding, chemical glue bonding or expansion bolt connection.

In addition, in the step (4), longitudinal waves are generated when the hammering direction is perpendicular to the structural surface, and transverse waves are generated when the hammering direction is parallel to the structural surface.

In addition, in the step (7), the Poisson's ratio of the complete rock mass is calculated according to the formula (1), and the modulus of elasticity is calculated according to the formula (2):

$\mathrm{<span\; class="notranslate">\; \&nu;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; c</span>}}_{\mathrm{<span\; class="notranslate">\; p</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; /</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}{\mathrm{<span\; class="notranslate">\; c</span>}}_{\mathrm{<span\; class="notranslate">\; p</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>\mathrm{<span\; class="notranslate">\; 2</span>}{\mathrm{<span\; class="notranslate">\; c</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; )</span>$

$\mathrm{<span\; class="notranslate">\; E.</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 2</span>}\mathrm{<span\; class="notranslate">\; \&rho;</span>}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 1</span>}<span\; class="notranslate">\; +</span>\mathrm{<span\; class="notranslate">\; \&nu;</span>}<span\; class="notranslate">\; )</span>{\mathrm{<span\; class="notranslate">\; c</span>}}_{\mathrm{<span\; class="notranslate">\; the\; s</span>}}^{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

Among them, ν is Poisson's ratio, E is elastic modulus, ρ is density, c _p is longitudinal wave velocity, c _s is transverse wave

wave speed.

In addition, the numerical methods in the step (8) include finite element method, discrete element method, finite volume method, finite difference method, and meshless method.

In addition, the method for adjusting the normal contact stiffness and tangential contact stiffness of the structural surface in the numerical model in the step (9) includes the dichotomy method, the steepest descent method, the conjugate gradient method, and the simulated annealing algorithm.

Also provided is a device using the method for testing the contact stiffness of a rock mass structural surface, which includes a hammering tool, several vibration sensors, an acquisition instrument, and a data processing unit;

The vibration sensor is configured to install on both sides with the rock mass structure plane as the symmetrical center, keep in a straight line, and sense the vibration signal generated by the hammering;

The acquisition instrument is configured to use the data line to connect with the vibration sensor to record the vibration signal generated by the hammer;

The hammering tool is configured to hammer on one side of the structural surface of the rock mass, and by adjusting the hammering direction, the longitudinal wave and the transverse wave propagating along the direction of the vibration sensor connection line are generated;

The data processing unit is configured to calculate the longitudinal wave velocity of the complete rock mass, the shear wave velocity, the time consumption of the longitudinal wave passing through the structural surface, and the time consumption of the shear wave passing through the structural surface; calculate the elastic modulus and Poisson's ratio of the complete rock mass; use the numerical method to inverse Perform analysis and establish a numerical model similar to the test area; constantly adjust the normal contact stiffness and tangential contact stiffness of the structural surface in the numerical model. When the time consumption of the structural surface is consistent, the normal contact stiffness and tangential contact stiffness at this time are the contact stiffness of the structural surface in the test area.

The present invention hammers the rock mass in two directions perpendicular to the structural surface and parallel to the structural surface on one side of the structural surface, so that the longitudinal waves and transverse waves propagating along the direction of the sensor connection line are respectively generated, and the sensors sensed by the acquisition instrument are captured. According to the distance between the sensors, calculate the longitudinal wave velocity, shear wave velocity, time consumption of longitudinal wave passing through the structural surface and time consumption of shear wave passing through the structural surface of the complete rock mass, according to the density of rock mass, longitudinal wave velocity and shear wave velocity Calculate the elastic modulus and Poisson's ratio of the complete rock mass, and use the numerical calculation method to analyze and calculate the time-consuming time for longitudinal waves and shear waves to pass through the structural surface. By continuously adjusting the normal contact stiffness and tangential contact stiffness of the structural surface in the numerical model, The longitudinal wave time consumption and shear wave time consumption obtained by numerical calculation are consistent with the calculated time consumption. The normal contact stiffness and tangential contact stiffness are the contact stiffness of the structural surface in the test area. Therefore, the contact stiffness of the test rock mass structural surface The method can directly measure and analyze structural surface rock mass in the field, has high test accuracy, simple testing procedure, can reflect the influence of original rock stress on structural surface stiffness, and can measure the contact stiffness of large structural surfaces.

Two specific examples of the present invention are given below.

Example 1:

The normal contact stiffness and tangential contact stiffness of a limestone structural plane in an open-pit mine were tested and analyzed. The experimental process is shown in Figure 1. Select an area with better outcropping on the structural surface 2, and use a brush to clean the structural surface 2 and the complete rock mass 1 on both sides to remove floating dust and loose broken bodies on the surface. Using gypsum, fix the vibration acceleration sensors 3 to 6 on the complete rock mass 1 on both sides of the structural surface 2 at a certain distance. The distances from acceleration sensors 4 and 5 to the structural surface 2 are both 5 cm, and the distances from acceleration sensors 3 and 6 to the structural surface are both 50 cm. Use the data line 7 to connect the acceleration sensors 3 to 6 to the acquisition instrument 8, and turn on the acquisition instrument 8 to make it in the sampling state. Select two hammering points, hammering point 9 and hammering point 11, and perform hammering according to hammering direction 10 at hammering point 9 to generate longitudinal waves propagating in the direction of structural surface 2; at hammering point 11, follow hammering direction 12 Hammering is performed to generate shear waves propagating in the direction of structural surface 2. Acceleration sensors 3 to 6 are used to pick up the vibration signals, and the acquisition instrument 8 is used to record the vibration signals. According to the start-up time of sensors 3 to 6 and the distance between sensors 3 to 6, it is calculated that the longitudinal wave velocity of the complete rock mass 1 is 3917m/s, the shear wave velocity is 2165m/s, and the time taken for the longitudinal wave to pass through the structural surface 2 is 0.21ms , the shear wave takes 0.65ms to pass through the structural surface. The density of the rock mass 1 in the test area was tested with a balance and a measuring cylinder, and it was 2500kg/m ³ . From this, the elastic modulus of the completed rock mass 1 on both sides of the structural surface 2 was calculated to be 30GPa, and the Poisson's ratio was 0.28. The deformable block discrete element method is used for numerical inversion, and the dichotomy method is selected as the parameter adjustment strategy. After calculation and analysis, the normal contact stiffness of structural surface 2 is 10.1GPa/m, and the tangential contact stiffness is 3.5GPa/m.

Example 2:

The normal contact stiffness and tangential contact stiffness were tested and analyzed for the granite structural surface exposed by the excavation of a certain slope. The experimental process is shown in Figure 2. Clean up the two structural surfaces 2 exposed by the excavation and the surrounding complete rock mass 1 to remove surface impurities. Use expansion bolts to install the vibration velocity sensors 3, 4, 5, 6, 13, 14 to the corresponding positions of the complete rock mass 1 around the structural surface 2; and ensure that the sensors 3, 4, 5, 6, 13, 14 are on a straight line , and perpendicular to the structural plane 2. The distances from sensor 4 and sensor 5 to the left structural surface 2 are both 10 cm, and the distances from sensor 6 and sensor 13 to the right structural surface 2 are also 10 cm. Between sensor 3 and sensor 4, between sensor 5 and sensor 6, The distance between sensor 13 and sensor 14 is 5 m. The sensors 3, 4, 5, 6, 13, 14 are connected to the acquisition instrument 8 by the data line 7, and the acquisition instrument 8 is turned on to make it in the sampling state. Hammering at the hammering point 9 in the hammering direction 10 generates longitudinal waves propagating to the two structural surfaces 2 ; hammering at the hammering point 11 in the hammering direction 12 generates transverse waves propagating to the two structural surfaces 2 . Calculated based on the vibration take-off time recorded by sensors 3, 4, 5, 6, 13, and 14 and the distance between the sensors, the time taken for the longitudinal wave to pass through the structural surface 2 on the right is 0.33ms, and the time for the longitudinal wave to pass through the structural surface 2 on the left It takes 0.24ms for the shear wave to pass through the structural surface 2 on the right, 0.78ms, and 0.65ms for the shear wave to pass through the structural surface 2 on the left. According to the rock mass density of 2600kg/m ³ obtained from the field test, the elastic modulus of the granite is calculated to be 41GPa, and the Poisson's ratio is 0.24. The numerical analysis was carried out by using the finite volume method with structural surface model, and the parameter adjustment method was selected as the conjugate gradient method. After calculation and analysis, the normal contact stiffness of structural surface 2 on the right and structural surface 2 on the left were 9.4GPa/m, 15GPa/m, the tangential contact stiffness of the right structural surface 2 and the left structural surface 2 are 2.8GPa/m and 6.4GPa/m respectively.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical essence of the present invention are still within the scope of this invention. The protection scope of the technical solution of the invention.

Claims (10)

1. test a method for rock mass discontinuity contact stiffness, it is characterized in that: the method comprises the following steps:

(1) choose good structural plane rock mass of appearing as test zone, remove dust and the loose crushing body on test zone surface;

(2) be that symcenter installs vibration transducer in both sides with rock mass discontinuity, each vibration transducer keeps point-blank;

(3) utilize data line to be connected with Acquisition Instrument by vibration transducer, open Acquisition Instrument and make it be in sample states;

(4) carry out hammering in the side of rock mass discontinuity, and produced the compressional wave and shear wave propagated along vibration transducer line direction by adjustment hammering direction;

(5) vibration signal utilizing each vibration transducer perception hammering to produce, and carry out record by Acquisition Instrument;

(6) according to Induction Peried and the distance of each vibration transducer, the longitudinal wave velocity of rockmass, transverse wave speed, compressional wave is calculated by consuming time by structural plane of consuming time, the shear wave of structural plane;

(7) density of the rockmass at test zone place is tested, and calculate elastic modulus and the Poisson ratio of rockmass;

(8) carry out back analysis by numerical method, set up the numerical model similar to test zone, the density of rockmass, elastic modulus and Poisson ratio all get field measurement parameter;

(9) shock load is applied in the side of numerical model, difference consuming time by structural plane of stress wave is obtained by the normal contact stiffness that constantly adjusts structural plane in numerical model and tangential contact stiffness, when stress wave is by the consuming time and step (6) of structural plane consuming time consistent, normal contact stiffness now and tangential contact stiffness are the contact stiffness of test zone structural plane.

2. the method for test rock mass discontinuity contact stiffness according to claim 1, is characterized in that: described structural plane comprises the dry structure face without thickness and the structural plane containing weak intercalated layer.

3. the method for test rock mass discontinuity contact stiffness according to claim 2, it is characterized in that: the vibration transducer quantity of the every side of described structural plane is more than or equal to 2, structural plane is more than or equal to 50cm with the spacing of side senser, and structural plane both sides are less than or equal to 10cm from the nearest sensor of structural plane to the distance of structural plane.

4. the method for test rock mass discontinuity contact stiffness according to claim 3, it is characterized in that: described vibration transducer comprises acceleration transducer, speed pickup, the frequency response of vibration transducer is more than or equal to 1KHz.

5. the method for test rock mass discontinuity contact stiffness according to claim 4, is characterized in that: described vibration transducer is bonding by gypsum, accelerated cement is bonding, and chemical glue mode that is bonding or expansion bolt connection is installed to rock mass.

6. the method for test rock mass discontinuity contact stiffness according to claim 5, is characterized in that: in described step (4), produce compressional wave when hammering direction is vertical with structural plane, produce shear wave when hammering direction is parallel with structural plane.

7. the method for test rock mass discontinuity contact stiffness according to claim 6, it is characterized in that: in described step (7), the Poisson ratio of rockmass is calculated, according to formula (2) calculating elastic modulus according to formula (1):

$\mathrm{\&nu;}=1-c_p^2/(2c_p^2-2c_s^2)---\left(1\right)$

$E=2\mathrm{\&rho;}(1+v)c_s^2---\left(2\right)$

Wherein ν is Poisson ratio, E is elastic modulus, ρ is density, c _pfor longitudinal wave velocity, c _sfor transverse wave speed.

8. the method for test rock mass discontinuity contact stiffness according to claim 7, is characterized in that: the numerical method in described step (8) comprises finite element method, distinct element method, finite volume method, method of finite difference, gridless routing.

9. the method for test rock mass discontinuity contact stiffness according to claim 8, is characterized in that: in the adjustment numerical model in described step (9), the normal contact stiffness of structural plane and the method for tangential contact stiffness comprise dichotomy, line of steepest descent method, method of conjugate gradient, simulated annealing.

10. use a device for the method for test rock mass discontinuity contact stiffness according to claim 9, it is characterized in that: it comprises fullering tool, some vibration transducers, Acquisition Instrument, data processing unit;

Vibration transducer configuration is that symcenter is installed in both sides with rock mass discontinuity, keeps point-blank, the vibration signal that perception hammering produces;

Acquisition Instrument configuration utilizes data line to be connected with vibration transducer, the vibration signal that record hammering produces;

Fullering tool configuration carries out hammering in the side of rock mass discontinuity, and is produced the compressional wave and shear wave propagated along vibration transducer line direction by adjustment hammering direction;

Data processing unit configuration calculates the longitudinal wave velocity of rockmass, transverse wave speed, compressional wave by consuming time by structural plane of consuming time, the shear wave of structural plane; Calculate elastic modulus and the Poisson ratio of rockmass; Carry out back analysis by numerical method, set up the numerical model similar to test zone; The normal contact stiffness of structural plane and tangential contact stiffness in continuous adjustment numerical model, when stress wave by the consuming time and compressional wave of structural plane by consuming time, the shear wave of structural plane by structural plane consuming time consistent time, normal contact stiffness now and tangential contact stiffness are the contact stiffness of test zone structural plane.