Device and method for rapid and fine determination of parameters of joint filling in weak interlayer

Abstract

A kind of soft interlayer filling joint parameter fine fast determination device, including joint rock mass surveying system, track frame system and soft interlayer filling medium surveying system, the joint rock mass surveying system and soft interlayer filling medium surveying system are installed in track frame system.And provide a kind of soft interlayer filling joint parameter fine fast determination method.The present application draws the fluctuation topography curve of upper and lower disc joint of soft interlayer and measures the thickness of soft interlayer, and the mechanical properties of joint rock mass are evaluated according to the thickness of soft interlayer and the fluctuation topography curve of upper and lower disc joint of soft interlayer.

Description

Technical Field

[0001] This invention belongs to the field of experimental measurement technology and relates to a device and method for precise and rapid determination of joint parameters of weak interlayer filling. It is mainly used for drawing the joint morphology of the upper and lower plates and measuring the thickness of weak interlayers. Background Technology

[0002] Weak interlayers within slopes and underground engineering rock masses are a major cause of instability and failure in jointed rock masses. Weak interlayer filling media refers to weak filling materials of a certain thickness within joints, which, compared to the footwall and hanging wall rock masses, typically exhibit low strength, high compressibility, and high fluidity. The mechanical properties and parameters of jointed rock masses are mainly influenced by factors such as the degree of filling of weak interlayers, the undulation morphology of the footwall and hanging wall joints, the composition of the weak interlayer filling material, and groundwater. Among these, the degree of filling of weak interlayers and the undulation morphology of the footwall and hanging wall joints are crucial factors affecting the mechanical properties of jointed rock masses. To evaluate the influence of the degree of filling of weak interlayers and the undulation morphology of the footwall and hanging wall joints on the parameters of weak interlayer filling joints, it is necessary to plot the undulation morphology curves of the footwall and hanging wall joints and measure the thickness of the weak interlayers. Currently, there is no suitable measuring device for the parameters of weak interlayer filling joints. Summary of the Invention

[0003] In order to overcome the shortcomings of existing technologies and to obtain the thickness of weak interlayers and the joint undulation morphology curves of the upper and lower footwalls to evaluate the mechanical properties of jointed rock masses, this invention provides a device and method for precise and rapid determination of joint parameters of weak interlayer filling, which can plot the joint undulation morphology curves of the upper and lower footwalls of weak interlayers and measure the thickness of weak interlayers.

[0004] The technical solution adopted by this invention to solve its technical problem is:

[0005] A device for precise and rapid determination of joint parameters in weak interlayer filling includes a jointed rock mass mapping system, a track frame system, and a weak interlayer filling medium mapping system, wherein the jointed rock mass mapping system and the weak interlayer filling medium mapping system are installed within the track frame system.

[0006] Furthermore, the jointed rock mass mapping system includes a drawing storage slot, a left-hand rotating shaft, a probe bar stylus groove, a sliding ball bearing, a jointed rock mass drawing pen, a probe bar stylus, a jointed rock mass mapping frame, a graduated fixed circular shaft, jointed rock mass drawing paper, a right-hand rotating shaft, a drawing extension groove, a rotating gear, a roller, and an adjusting spring. The drawing storage slot, probe bar stylus groove, and drawing extension groove are located within the jointed rock mass mapping frame. The graduated fixed circular shaft is located at the top of the probe bar stylus and is installed within the jointed rock mass mapping frame via the adjusting spring. The roller is located at the bottom of the probe bar stylus. The jointed rock mass drawing pen and sliding ball bearing are located at the side of the probe bar stylus. The right-hand rotating shaft is located within the drawing extension groove, and the left-hand rotating shaft is located within the drawing storage slot. The jointed rock mass drawing paper is located within the jointed rock mass mapping frame and is connected to the left-hand and right-hand rotating shafts. The rotating gear is located at the ends of the left-hand and right-hand rotating shafts, respectively.

[0007] Furthermore, the weak interlayer filling medium mapping system includes a lightweight roller, a left lightweight rod, a right lightweight rod, a weak interlayer filling medium drawing pen, a weak interlayer filling medium drawing paper, a movable mapping frame, an embedded gear, and a drawing shaft. The left and right lightweight rods are installed at both ends of the lightweight roller and connected to the movable mapping frame. The weak interlayer filling medium drawing pen is located inside the movable mapping frame and connected to the end of the left lightweight rod. The weak interlayer filling medium drawing paper is connected to the drawing shaft and installed inside the movable mapping frame. The embedded gear is installed at the top of the drawing shaft and located inside the movable mapping frame.

[0008] Furthermore, the track frame system includes a cone, a fixed rod, a rotating hinge, a moving track, and a rack. The cone is mounted on the bottom of the fixed rod, the fixed rod is mounted on both ends of the moving track via the rotating hinge, and the rack is located on both sides of the moving track.

[0009] A method for precise and rapid determination of joint parameters in weak interlayer filling includes the following steps:

[0010] Step 1: Select the measurement area size of the jointed rock mass according to the stability evaluation requirements;

[0011] Step 2: Based on the dimensions of the jointed rock mass measurement area, determine the measurement direction of the joint parameters according to the azimuth angle, and record the joint measurement length;

[0012] Step 3: Determine the dimensions of the track frame system based on the dimensions of the jointed rock mass measurement area;

[0013] Step 4: Install the fine and rapid measurement device for weak interlayer filling joint parameters. The measurement device includes a jointed rock mass mapping system, a track frame system, and a weak interlayer filling medium mapping system. The jointed rock mass mapping system and the weak interlayer filling medium mapping system are installed in the track frame system. After installation, record the initial positions of the jointed rock mass mapping system and the weak interlayer filling medium mapping system.

[0014] Step 5: Begin the experiment and plot the joint morphology curves of the hanging wall and the footwall along the joint parameter measurement direction;

[0015] Step 6: Adjust the measuring device and repeat step 5 to determine the joint parameters in different measurement directions;

[0016] Step 7: End the test, remove and dismantle the measuring device from the weak interlayer filling medium;

[0017] Step 8: Process the joint morphology curves of the upper and lower plates. Calculate the thickness function of the weak interlayer based on the relative positions of the joint morphology curves, and then use the formula... Calculate the average thickness of the weak interlayer;

[0018] Step 9: Calculate the joint undulation amplitude of the upper and lower plates based on the joint morphology curves, and calculate the ratio of the joint undulation amplitude to the measured length to obtain the relative amplitude of the joint surface. Substitute this value into the modified straight edge formula to calculate the joint roughness coefficient.

[0019] Step 10: Calculate the integral value of the joint morphology curves of the upper and lower plates along the measurement length direction to the ratio of the joint measurement length to obtain the average value of the joint undulation of the upper and lower plates. Sum the average values ​​of the joint undulation of the upper and lower plates to obtain the average difference between the peaks and valleys within the joint measurement length range. Then calculate the ratio of the average thickness of the weak interlayer to the average difference between the peaks and valleys of the joint, which is the filling degree of the weak interlayer.

[0020] Step 11: Calculate joint parameters such as the surface undulation angle and basic friction angle of the joint, and combine them with the weak interlayer filling degree and the average joint roughness coefficient to calculate the peak shear strength of the joint using the Barton formula. Then, reduce the peak shear strength of the joint according to the joint filling degree to obtain the shear strength of the weak interlayer filled joint.

[0021] Step 12: Calculate the joint parameters for filling weak interlayers at different azimuth angles.

[0022] Furthermore, in step 12, a rose diagram of the joint parameters of the weak interlayer filling is drawn, and then the stability of the jointed rock mass is evaluated using the rose diagram.

[0023] The beneficial effects of the present invention are mainly reflected in: (1) the joint morphology curves of the upper and lower footwalls of the weak interlayer filled jointed rock mass can be drawn; (2) the surface morphology curves of the weak interlayer filling medium can be drawn; (3) the parameters such as the thickness of the weak interlayer, the degree of filling and the joint roughness coefficient can be obtained by data analysis of the joint undulation morphology curves of the upper and lower footwalls. Attached Figure Description

[0024] Figure 1 This is a front view of a jointed rock mass mapping system.

[0025] Figure 2 yes Figure 1 BB cross-sectional view.

[0026] Figure 3 This is a top view of the jointed rock mass mapping system.

[0027] Figure 4 yes Figure 3 AA sectional view.

[0028] Figure 5 This is the left view of the jointed rock mass mapping system.

[0029] Figure 6 This is the right view of the jointed rock mass mapping system.

[0030] Figure 7 This is a front view of a device for the precise and rapid determination of joint parameters in the filling of weak interlayers.

[0031] Figure 8 This is the right view of a device for precise and rapid determination of joint parameters in weak interlayer filling.

[0032] Figure 9 This is a front view of a mapping system for weak interlayer filling media.

[0033] Figure 10 This is the right view of the mapping system for weak interlayer filling media.

[0034] Figure 11 yes Figure 10 CC section view.

[0035] The components include: 1. Drawing storage slot; 2. Left rotating shaft; 3. Probe strip stylus groove; 4. Sliding ball bearing; 5. Jointed rock mass drawing pen; 6. Probe strip stylus; 7. Jointed rock mass mapping frame; 8. Graduated fixed round shaft; 9. Jointed rock mass drawing drawing; 10. Right rotating shaft; 11. Drawing extension slot; 12. Rotating gear; 13. Roller; 14. Adjusting spring; 15. Cone; 16. Fixed rod; 17. Rotating hinge; 18. Moving track; 19. Rack; 20. Lightweight roller; 21. Left lightweight rod; 22. Right lightweight rod; 23. Soft interlayer filling medium drawing pen; 24. Soft interlayer filling medium drawing drawing; 25. Moving mapping frame; 26. Embedded gear; 27. Drawing rotating shaft. Detailed Implementation

[0036] The present invention will now be further described with reference to the accompanying drawings.

[0037] Reference Figures 1 to 11 A device for precise and rapid determination of joint parameters in weak interlayer filling includes a jointed rock mass mapping system, a track frame system, and a weak interlayer filling medium mapping system, wherein the jointed rock mass mapping system and the weak interlayer filling medium mapping system are installed within the track frame system.

[0038] Furthermore, the jointed rock mass mapping system includes: a drawing storage slot 1, a left-hand rotating shaft 2, a probe strip stylus groove 3, a sliding ball bearing 4, a jointed rock mass drawing pen 5, a probe strip stylus 6, a joint mapping frame 7, a graduated fixed circular shaft 8, jointed rock mass drawing paper 9, a right-hand rotating shaft 10, a drawing extension groove 11, a rotating gear 12, a roller 13, and an adjusting spring 14. The drawing storage slot, the probe strip stylus groove, and the drawing extension groove are located within the joint mapping frame, and the graduated fixed circular shaft is located within... The probe bar stylus is mounted at its top end and within the joint mapping frame via the adjusting spring. The roller is located at the bottom end of the probe bar stylus. The joint rock mass drawing pen and sliding ball are located at the side end of the probe bar stylus. The right rotating shaft is located within the drawing extension groove, and the left rotating shaft is located within the drawing storage groove. The joint rock mass drawing paper is located within the joint mapping frame and connected to the left and right rotating shafts. The rotating gears are located at the ends of the left and right rotating shafts, respectively.

[0039] Furthermore, the weak interlayer filling medium mapping system includes a lightweight roller 20, a left lightweight rod 21, a right lightweight rod 22, a weak interlayer filling medium drawing pen 23, a weak interlayer filling medium drawing paper 24, a mobile mapping frame 25, an embedded gear 26, and a drawing shaft 27. The left and right lightweight rods are installed at both ends of the lightweight roller and connected to the mobile mapping frame. The weak interlayer filling medium drawing pen is located inside the mobile mapping frame and connected to the end of the left lightweight rod. The weak interlayer filling medium drawing paper is connected to the drawing shaft and installed inside the mobile mapping frame. The embedded gear is installed at the top of the drawing shaft and located inside the mobile mapping frame.

[0040] Furthermore, the track frame system includes a cone 15, a fixed rod 16, a rotating hinge 17, a moving track 18, and a rack 19. The cone is installed at the bottom of the fixed rod, the fixed rod is installed at both ends of the moving track through the rotating hinge, and the rack is located on both sides of the moving track.

[0041] A method for precise and rapid determination of joint parameters in weak interlayer filling includes the following steps:

[0042] Step 1: Select the measurement area size of the jointed rock mass according to the stability evaluation requirements;

[0043] Step 2: Based on the dimensions of the jointed rock mass measurement area, determine the measurement direction of the joint parameters according to the azimuth angle, and record the joint measurement length;

[0044] Step 3: Determine the dimensions of the track frame system based on the dimensions of the jointed rock mass measurement area;

[0045] Step 4: Install the fine and rapid measurement device for weak interlayer filling joint parameters. The measurement device includes a jointed rock mass mapping system, a track frame system, and a weak interlayer filling medium mapping system. The jointed rock mass mapping system and the weak interlayer filling medium mapping system are installed in the track frame system. After installation, record the initial positions of the jointed rock mass mapping system and the weak interlayer filling medium mapping system.

[0046] Step 5: Begin the experiment and plot the joint morphology curves of the hanging wall and the footwall along the joint parameter measurement direction;

[0047] Step 6: Adjust the measuring device and repeat step 5 to determine the joint parameters in different measurement directions;

[0048] Step 7: End the test, remove and dismantle the measuring device from the weak interlayer filling medium;

[0049] Step 8: Process the joint morphology curves of the upper and lower plates. Calculate the thickness function of the weak interlayer based on the relative positions of the joint morphology curves, and then use the formula... Calculate the average thickness of the weak interlayer;

[0050] Step 9: Calculate the joint undulation amplitude of the upper and lower plates based on the joint morphology curves, and calculate the ratio of the joint undulation amplitude to the measured length to obtain the relative amplitude of the joint surface. Substitute this value into the modified straight edge formula to calculate the joint roughness coefficient.

[0051] Step 10: Calculate the integral value of the joint morphology curves of the upper and lower plates along the measurement length direction to the ratio of the joint measurement length to obtain the average value of the joint undulation of the upper and lower plates. Sum the average values ​​of the joint undulation of the upper and lower plates to obtain the average difference between the peaks and valleys within the joint measurement length range. Then calculate the ratio of the average thickness of the weak interlayer to the average difference between the peaks and valleys of the joint, which is the filling degree of the weak interlayer.

[0052] Step 11: Calculate joint parameters such as the surface undulation angle and basic friction angle of the joint, and combine them with the weak interlayer filling degree and the average joint roughness coefficient to calculate the peak shear strength of the joint using the Barton formula. Then, reduce the peak shear strength of the joint according to the joint filling degree to obtain the shear strength of the weak interlayer filled joint.

[0053] Step 12: Calculate the parameters of weak interlayer filling joints at different azimuth angles and draw the rose diagram of the weak interlayer filling joint parameters. Then, use the rose diagram to evaluate the stability of the jointed rock mass.

[0054] In this embodiment, preliminary exploration of a certain slope rock mass revealed the presence of weak interlayers of varying thickness, affecting the stability of the jointed rock mass. Therefore, it is necessary to obtain parameters such as the morphology of the hanging wall and footwall of the weak interlayer-filled joint, and the thickness of the weak interlayer. Using the precise and rapid measurement device and operating method for weak interlayer-filled joint parameters provided by this invention, the surface undulation morphology of the hanging wall, footwall, and filling medium of the weak interlayer-filled joint can be quickly obtained, thereby obtaining parameters such as the joint roughness coefficient, weak interlayer thickness, and filling degree that affect the stability of the rock mass.

[0055] In this embodiment, the slope rock strata dip at 120° to 130° with a dip angle of 35°. There are weak interlayers of silty clay within the joints. The upper and lower footwalls are made of limestone, with the upper layer being thinner and the lower layer thicker. The rock mass is moderately weathered.

[0056] The embodiment of the present invention includes the following steps:

[0057] (1) Selecting the rock mass measurement area. In this embodiment, a jointed rock mass is selected from the field. Based on the stability evaluation requirements of the jointed rock mass, a region with densely filled weak interlayers is selected for determining the joint parameters of the weak interlayers. The area to be measured is 2.5m × 2.0m in size. The hanging wall of the weak interlayer in the area to be measured is removed.

[0058] (2) Determine the measurement direction of joint parameters. With the center of the area to be measured as the center, divide the area to be measured from 0° to 360° into 12 equal parts, with the angle between each dividing line being 30°. The initial measurement direction is 0° azimuth, and the joint measurement length is 1m.

[0059] (3) Determine the dimensions of the track frame system based on the selected measurement area. Two 0.5m moving tracks 18 are selected based on the dimensions of the jointed rock mass in this embodiment. Four 0.2m fixed rods 16 are selected based on the degree of joint filling.

[0060] (4) Assemble the track frame system and place it in the soft interlayer filling medium through the fixing rod 16. Splice the two sections of moving track 18, and then install the spliced ​​fixing rod 16 at both ends of the moving track 18 through the rotating hinge 17. Then install the pointed cone 15 at the bottom of the fixing rod 16, and then pass through the soft interlayer filling medium to contact the surface of the footwall rock mass. Adjust the height of the fixing rod 16 so that the moving track 18 is parallel to the dip of the jointed rock mass.

[0061] (5) Assemble the soft interlayer filling medium mapping system. Install the soft interlayer filling medium drawing paper 24 in the mobile mapping frame 25 through two drawing shafts 27, and install the embedded gear 26 at the top of the two drawing shafts 27. Then, install the soft interlayer filling medium drawing pen 23 on the left lightweight rod 21, and connect the lightweight roller 20 to the mobile mapping frame 25 through the left lightweight rod 21 and the right lightweight rod 22.

[0062] (6) Assemble the jointed rock mass mapping system. First, install the right-hand rotating shaft 10 in the drawing extension slot 11 and the left-hand rotating shaft 2 in the drawing storage slot 1. Then, install the rolled jointed rock mass drawing paper 9 on the right-hand rotating shaft 10, and pull one end of the rolled jointed rock mass drawing paper 9 on the left-hand rotating shaft 2. Next, install the graduated fixed round shaft 8 on the top of the probe bar stylus 6, and install the jointed rock mass drawing pen 5 and the sliding ball 4 on the side of the probe bar stylus 6. Adjust the spring 14 to install the assembled parts into the probe bar stylus slide groove 3. Finally, install the two rotating gears 12 on the left-hand rotating shaft 2 and the right-hand rotating shaft 10 respectively.

[0063] (7) The assembled jointed rock mass mapping system is installed in the track frame system via roller 13, and the position of roller 13 relative to fixed rod 16 is recorded. The jointed rock mass mapping system is installed in the track frame system by rotating gear 12, so that the bottom roller 13 contacts the footwall rock mass. The height of roller 13 relative to fixed rod 16 is recorded at this time by using graduated fixed shaft 8, thus obtaining the initial position of the footwall joint undulation morphology curve.

[0064] (8) The assembled soft interlayer filling medium mapping system is installed in the track frame system via the embedded gear 26, and the position of the lightweight roller 20 relative to the fixed rod 16 is recorded. The soft interlayer filling medium mapping system is installed on the moving track 18 in the track frame system via the embedded gear 26, and the height of the lightweight roller 20 relative to the fixed rod 16 is recorded at this time to obtain the initial position of the joint undulation morphology curve of the upper plate.

[0065] (9) The surface morphology curve of the weak interlayer filling medium is drawn using the weak interlayer filling mapping system. The weak interlayer filling medium mapping system is slid along the 0° azimuth angle, so that the lightweight roller 20 in the weak interlayer filling medium mapping system moves up and down with the undulation of the weak interlayer filling medium morphology, driving the weak interlayer filling medium drawing pen 23 at the end of the left lightweight rod 21, so that the weak interlayer filling medium drawing pen 23 draws the surface morphology curve of the weak interlayer filling medium and the joint plate on the weak interlayer filling medium drawing paper 24.

[0066] (10) The joint morphology curve of the footwall is drawn using the jointed rock mass mapping system. The jointed rock mass mapping system is slid along the 0° azimuth angle, so that the probe bar stylus 6 in the jointed rock mass mapping system moves up and down with the undulating morphology of the footwall rock mass, thereby driving the jointed rock mass drawing pen 5, so that the jointed rock mass drawing pen 5 draws the footwall joint morphology curve on the jointed rock mass drawing paper 9.

[0067] (11) Remove the fixed rod 16 at the end furthest from the center of the measurement area, rotate the moving track 18 to adjust the track system to the required azimuth angle, and place the track system back into the soft interlayer filling medium through the fixed rod 16. Keep the position of the fixed rod 16 at the center of the measurement area unchanged, remove the fixed rod 16 at the other end from the soft interlayer filling medium, then rotate the moving track 18 at the required angle, and place the track frame system back into the soft interlayer filling medium through the fixed rod 16. Finally, adjust the height of the fixed rods 16 at both ends so that the track system 18 is parallel to the dip of the jointed rock mass.

[0068] (12) Repeat steps (7) to (11) to obtain the joint parameters of the weak interlayer filling in different measurement directions.

[0069] (13) After completing the measurement of joint parameters of the weak interlayer filling, remove the entire measuring device from the weak interlayer filling medium, and then disassemble the joint rock mass mapping system, the weak interlayer filling medium mapping system, and the track frame system. First, remove the entire measuring device from the weak interlayer filling medium, then remove the joint rock mass mapping system and the weak interlayer filling medium mapping system from the track frame system, and finally disassemble the joint rock mass mapping system, the weak interlayer filling medium mapping system, and the track frame system respectively.

[0070] (14) Data processing was performed on the joint morphology curves of the upper and lower hanging walls to calculate the thickness function of the weak interlayers and the average thickness of the weak interlayers. The joint undulation morphology curve f of the upper hanging wall was scanned. up (x) and the curve of the joint undulation of the lower plateau f down (x) is digitized, and then, according to the initial positions of the joint undulation morphology curves of the upper and lower plates, the difference between the two morphology curves along the measurement length direction is calculated to obtain the thickness function h(x) of the weak interlayer. Finally, the formula is used... Calculate the average thickness of the weak interlayer Where x is the abscissa of the measurement length direction.

[0071] (15) Calculate the joint undulation amplitude based on the joint morphology curve, and calculate the ratio of the joint undulation amplitude to the measured length to obtain the relative amplitude of the joint surface. Substitute this value into the modified straight-edge formula to calculate the joint roughness coefficient. Calculate the joint undulation amplitude of the upper and lower plates using the joint morphology curves of the upper and lower plates, and calculate the ratio of the joint undulation amplitude of the upper and lower plates to the joint measured length to obtain the relative amplitude of the joint surface of the upper and lower plates. Then, substitute the relative amplitude of the joint surface and the joint measured length into the modified straight-edge formula to obtain the joint roughness coefficient of the upper and lower plates. Next, assign different weighting coefficients to the joint roughness coefficient according to the joint undulation amplitude, and calculate the sum of the weighted values ​​of the joint roughness coefficients of the upper and lower plates to obtain the mean value of the joint roughness coefficient.

[0072] (16) Calculate the integral value of the joint morphology curve of the upper and lower plates along the measurement length direction to the joint measurement length, and obtain the average value of the joint undulation of the upper and lower plates. Sum the average values ​​of the joint undulation of the upper and lower plates to obtain the average difference between the peaks and valleys within the joint measurement length range. Then calculate the ratio of the average thickness of the weak interlayer to the average difference between the peaks and valleys of the joint, which is the filling degree of the weak interlayer.

[0073] (17) Calculate joint parameters such as the joint surface undulation angle and the basic friction angle, and combine them with the weak interlayer filling degree and the average joint roughness coefficient to calculate the peak joint shear strength using the Barton formula. Then, reduce the peak joint shear strength according to the joint filling degree to obtain the shear strength of the weak interlayer filled joint. Calculate the joint surface undulation angle using the joint morphology curve, and obtain joint parameters such as the basic friction angle according to the direct shear test. Then, combine them with the average joint roughness coefficient to obtain the peak joint shear strength using the Barton formula. Next, calculate the joint shear strength reduction factor using the weak interlayer filling degree. Finally, multiply the peak joint shear strength by the reduction factor to calculate the shear strength of the weak interlayer filled joint.

[0074] (18) Calculate the parameters of weak interlayer filling joints at different azimuth angles and draw the weak interlayer filling joint parameter rose diagram. Use the rose diagram to evaluate the stability of the jointed rock mass. Repeat steps (14) to (17) to calculate the parameters of weak interlayer filling joints at different azimuth angles. Then draw the weak interlayer filling joint parameter rose diagram, which includes the joint roughness coefficient, weak interlayer thickness, weak interlayer filling degree and weak interlayer filling joint shear strength. Then, determine the weak surface in the area based on the weak interlayer filling joint parameter rose diagram. Take the weak interlayer filling joint parameter of the weak surface as the representative value of the weak interlayer filling joint parameter in the measurement area to determine the stability of the jointed rock mass.

[0075] The embodiments described in this specification are merely examples of implementations of the inventive concept and are for illustrative purposes only. The scope of protection of this invention should not be considered limited to the specific forms described in these embodiments; rather, it extends to equivalent technical means conceived by those skilled in the art based on the inventive concept.

Claims

1. A method for rapid and accurate determination of the parameters of a weak interlayer filling joint, characterized in that, The determination method comprises the following steps: Step 1, according to the requirement of jointed rock mass stability evaluation, the size of jointed rock mass measurement area is selected; Step 2, according to the size of jointed rock mass measurement area, the measurement direction of joint parameters is determined according to the azimuth angle, and the joint measurement length is recorded; Step 3, according to the size of jointed rock mass measurement area, the size of track frame system is determined; Step 4, the soft interlayer filling joint parameter fine and rapid determination device is installed, the determination device comprises a jointed rock mass surveying system, a track frame system and a soft interlayer filling medium surveying system, the jointed rock mass surveying system and the soft interlayer filling medium surveying system are installed in the track frame system, after installation, the initial positions of the jointed rock mass surveying system and the soft interlayer filling medium surveying system are recorded; Step 5, the test is started, the upper disc joint topography curve and the lower disc joint topography curve are drawn along the joint parameter measurement direction; Step 6, the measurement device is adjusted, step 5 is repeated to realize the determination of joint parameters in different measurement directions; Step 7, the test is ended, the measurement device is taken out from the soft interlayer filling medium and removed; Step 8, data processing of the upper and lower disc joint topography curve, according to the relative position of the joint topography curve, the thickness function h(x) of the weak interlayer is calculated, and then the formula The average value of the thickness of the weak interlayer is calculated x is the horizontal coordinate in the direction of the measurement length; Step 9, the upper disc joint fluctuation amplitude and the lower disc joint fluctuation amplitude are calculated according to the upper disc joint topography curve and the lower disc joint topography curve, the ratio of joint fluctuation amplitude to measurement length is obtained to obtain the relative amplitude of joint surface, the joint roughness coefficient is calculated by substituting the correction straight edge formula; Step 10, the ratio of the integral value of the upper disc joint topography curve and the lower disc joint topography curve in the measurement length direction to the joint measurement length is calculated to obtain the average value of the upper disc joint fluctuation and the lower disc joint fluctuation, the average value of the upper disc joint fluctuation and the lower disc joint fluctuation is summed to obtain the average difference value of the peak and valley in the joint measurement length range, then the ratio of the average value of the soft interlayer thickness to the average difference value of the joint peak and valley is calculated, which is the soft interlayer filling degree; Step 11, the joint surface fluctuation angle and the basic friction angle joint parameters are calculated, the soft interlayer filling degree and the average value of the joint roughness coefficient are combined, the Barton formula is used to calculate the peak value of the joint shear strength, then the joint peak shear strength is reduced according to the joint filling degree to obtain the shear strength of the soft interlayer filling joint; Step 12, the soft interlayer filling joint parameters in different azimuth angles are calculated.

2. The method for rapid and accurate determination of the parameters of the joint filling of soft interlayers according to claim 1, characterized in that, The jointed rock mass surveying system comprises a drawing paper storage groove, a left rotating shaft, a detection strip-shaped stylus sliding groove, a sliding ball, a jointed rock mass drawing pen, a detection strip-shaped stylus, a joint surveying frame, a fixed circular shaft with scales, jointed rock mass drawing paper, a right rotating shaft, a drawing paper stretching groove, a rotating gear, a roller and an adjusting spring, the drawing paper storage groove, the detection strip-shaped stylus sliding groove and the drawing paper stretching groove are located in the joint surveying frame, the fixed circular shaft with scales is located at the top end of the detection strip-shaped stylus and is installed in the joint surveying frame through the adjusting spring, the roller is located at the bottom end of the detection strip-shaped stylus, the jointed rock mass drawing pen and the sliding ball are located at the side end of the detection strip-shaped stylus, the right rotating shaft is located in the drawing paper stretching groove, the left rotating shaft is located in the drawing paper storage groove, the jointed rock mass drawing paper is located in the joint surveying frame and is connected with the left rotating shaft and the right rotating shaft, and the rotating gears are respectively located at the end portions of the left rotating shaft and the right rotating shaft.

3. The method for fast and fine determination of the parameters of the joint filling of soft interlayers according to claim 1 or 2, characterized in that, The weak interlayer filling medium mapping system comprises a light roller, a left light bar, a right light bar, a weak interlayer filling medium drawing pen, a weak interlayer filling medium drawing paper, a moving mapping frame, an embedded gear and a paper shaft, the left light bar and the right light bar are installed at both ends of the light roller and connected with the moving mapping frame, the weak interlayer filling medium drawing pen is located in the moving mapping frame and connected with the end of the left light bar, the weak interlayer filling medium drawing paper is connected with the paper shaft and installed in the moving mapping frame, and the embedded gear is installed at the top of the paper shaft and located in the moving mapping frame.

4. The method for quickly and finely determining the filled-joint parameters of a soft interlayer according to claim 1 or 2, characterized in that, The track frame system comprises a sharp cone, a fixed rod, a rotating hinge, a moving track and a rack, the sharp cone is installed at the bottom of the fixed rod, the fixed rod is installed at both ends of the moving track through the rotating hinge, and the rack is located at both sides of the moving track.

5. The method of claim 1, wherein the method is a rapid and accurate method for determining the parameters of the filled-joint of the weak interlayer, characterized by, In step 12, a weak interlayer filling joint parameter rose diagram is drawn, and then the rose diagram is used to evaluate the stability of the joint rock mass.

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