CN108766175B - Model device for demonstrating redirection of core and fracture paleo-geomagnetism - Google Patents
Model device for demonstrating redirection of core and fracture paleo-geomagnetism Download PDFInfo
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- CN108766175B CN108766175B CN201810648308.5A CN201810648308A CN108766175B CN 108766175 B CN108766175 B CN 108766175B CN 201810648308 A CN201810648308 A CN 201810648308A CN 108766175 B CN108766175 B CN 108766175B
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Abstract
The invention provides a model device for demonstrating the redirection of the paleogeomagnetism of a rock core and a fracture, which comprises a supporting plate; be equipped with upright bracing piece in the backup pad, still include a demonstration platform base, the demonstration platform base is unsettled to be set up on the bracing piece through the horizontal pole, is equipped with the first angle adjustment mechanism that can adjust rotation angle on the horizontal plane on the demonstration platform base, still includes the upper end opening that is used for placing the core of core fixed cylinder, and the below of core fixed cylinder is equipped with the second angle adjustment mechanism that can adjust rotation angle at longitudinal plane, second angle adjustment mechanism pass through the link with core fixed cylinder is connected, second angle adjustment mechanism connects in first angle adjustment mechanism's top.
Description
Technical Field
The invention relates to the field of restoration of a field drilling core of ancient geomagnetism, in particular to a core and fracture ancient geomagnetism redirection demonstration model device for a specific process of redirecting the field drilling core and fracture ancient geomagnetism.
Background
The recovery of the core orientation can solve a plurality of geological problems, such as judging the development rule of underground cracks, the ancient water flow direction and the like. However, the core obtained in general cannot be positioned underground due to the rotation occurring during extraction. Some core redirection methods are as follows: the 'photographic tool' method, the inclinometer method and the like are not applicable due to too high cost or too large error, and compared with other methods, the ancient geomagnetic rock core redirection method is relatively accurate in data and low in cost. Understanding the process of borehole core redirection is critical to interpretation of the results of the paleomagnetic data, however, the borehole core redirection process is abstract, affecting human understanding of core azimuth recovery and further understanding of subsurface constituent ore features. Therefore, a process demonstration problem of redirecting the drilled core and the fracture is needed to be solved at present.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, adapt to the actual needs, and provide a core and fracture paleogeomagnetic redirection demonstration model device for demonstrating the redirection process of a drilling core.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows:
the model device for demonstrating the redirection of the paleogeomagnetism of the rock core and the fracture is designed and comprises a supporting plate; be equipped with upright bracing piece in the backup pad, still include a demonstration platform base, the demonstration platform base is unsettled to be set up on the bracing piece through the horizontal pole, is equipped with the first angle adjustment mechanism that can adjust rotation angle on the horizontal plane on the demonstration platform base, still includes the upper end opening that is used for placing the core of core fixed cylinder, and the below of core fixed cylinder is equipped with the second angle adjustment mechanism that can adjust rotation angle at longitudinal plane, second angle adjustment mechanism pass through the link with core fixed cylinder is connected, second angle adjustment mechanism connects in first angle adjustment mechanism's top.
Preferably, the first angle adjusting mechanism comprises a first adjusting screw rod arranged on the base of the demonstration table and a circular horizontal adjusting nut sleeved on the first adjusting screw rod in a threaded manner, the circular horizontal adjusting nut rotates around the first adjusting screw rod, a circular horizontal adjusting dial is arranged on the core demonstration table, scale values are arranged on the horizontal adjusting dial, and a horizontal alignment pointer is arranged on the circular horizontal adjusting nut; the second angle adjusting mechanism is arranged on the round horizontal adjusting nut.
Preferably, the second angle adjustment mechanism comprises two fixing plates fixed on the circular horizontal adjusting nut, the two fixing plates are arranged at intervals, two ends of the two fixing plates are respectively fixed with a nut, the second angle adjustment mechanism further comprises a second adjusting screw rod penetrating through the two nuts and in threaded connection with the two nuts, a semicircular inclination angle adjusting dial is fixed on one fixing plate, scale values are arranged on the inclination angle adjusting dial, a cross-shaped mark is attached to the end part of the second adjusting screw rod, and the lower end of the connecting frame is connected with the middle part of the second adjusting screw rod.
Preferably, the side wall of the core fixing barrel is provided with at least two core fixing screws, the core fixing screws penetrate through the core fixing barrel and are in threaded connection with the side wall of the core fixing barrel, and the core fixing screws are symmetrically arranged about the axis of the core fixing barrel.
Preferably, a direction marking line with an arrow is arranged on the supporting plate.
Preferably, a rotary lifting base is respectively arranged at four corners of the supporting plate, and the rotary lifting base is a screw rod and is in threaded connection with the supporting plate.
Preferably, the device further comprises a circular track, wherein the track is supported by at least three crack measuring brackets, the track is arranged around the rock core fixing cylinder, and the rock core fixing cylinder is positioned at the central position of the track; the sliding groove on the track is internally provided with a sliding block which can slide in the sliding groove, the sliding block is provided with a through hole, the sliding block also comprises a telescopic adjusting rod which penetrates through the through hole, the sliding block also comprises a crack dip angle measuring device which is arranged on the outer side wall of the sliding block, the crack dip angle measuring device is provided with a scale value, the adjusting rod passes through the center of the crack dip angle measuring device, and an arrow is arranged on the adjusting rod at the side part of the crack dip angle measuring device; the adjusting fork is sleeved on the side wall of the rock core fixing cylinder, and the middle part of the adjusting fork is connected with the end part of the adjusting rod.
Preferably, the cross section of the track is U-shaped or [ shaped ].
Preferably, the height of the crack measuring bracket is adjustable.
The invention has the beneficial effects that:
1. the device can help understand the process of redirecting the paleogeomagnetic rock core better, and greatly improves the use of the paleogeomagnetic rock core redirecting method.
2. For a borehole core paleogeomagnetic sample, an abstract borehole core redirection process can be embodied, and the specific orientation of the fracture can be determined. The method helps understand the complex process of redirecting the core by the paleogeomagnetic method, improves the utilization rate of the method, and has important value for correctly processing paleogeomagnetic data and finding ores in the later period.
3. For the open-air paleo-magnetic small sample with outcrop, the specific process of how the open-air paleo-magnetic small sample is converted from the sample coordinate system to the geographic coordinate system and from the geographic coordinate system to the stratum coordinate system can be simulated truly. The redirection process of the small sample of the field geomagnetism is fully understood, and the process of the data processing of the geomagnetism is clearer and more thorough.
Drawings
FIG. 1 is a schematic diagram of the main structure of the present invention;
FIG. 2 is a schematic cross-sectional view of a first angle adjusting mechanism and a second angle adjusting mechanism according to the present invention;
FIG. 3 is a schematic plan view of a second adjusting screw of the second angle adjusting mechanism of the present invention after being engaged with an inclination adjusting dial;
FIG. 4 is a schematic plan view of the first angle adjusting mechanism of the present invention after the first adjusting screw section is matched with the horizontal adjusting dial;
FIG. 5 is a schematic view of another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a cross-sectional state of the slider and the chute after being matched.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
example 1: a model device for demonstrating the redirection of the geomagnetism of a rock core and a fracture is disclosed, and is shown in fig. 1 to 4.
The rock core and fracture paleogeomagnetic redirection demonstration model device 1 in the design comprises a supporting plate 2, wherein a direction marking line 4 with an arrow is arranged on the supporting plate, a rotary lifting base 3 is respectively arranged at four corners of the supporting plate 2, and the rotary lifting base 3 is a screw and is in threaded connection with the supporting plate. Meanwhile, the support plate 2 is provided with an upright support rod 11 and further comprises a demonstration table base 5, and the demonstration table base 5 is suspended and fixed through the support rod 11.
Further, this design still be equipped with the first angle adjustment mechanism that can adjust rotation angle on the horizontal plane on the demonstration table base 5, specifically, first angle adjustment mechanism is including setting up the circular horizontal adjustment nut 6 on first adjustment screw 7, the thread bush on demonstration table base 5, circular horizontal adjustment nut 6 rotates round first adjustment screw 7, demonstration table base 5 on be equipped with one set of circular horizontal adjustment calibrated scale 23, be equipped with scale value 21 on the horizontal adjustment calibrated scale 23, simultaneously, be equipped with the horizontal alignment pointer 19 on the circular horizontal adjustment nut 6.
The device also comprises a rock core fixing barrel 9 for placing a rock core, wherein the upper end of the rock core fixing barrel 9 is provided with an opening, a second angle adjusting mechanism 12 capable of adjusting the rotation angle on a longitudinal plane is arranged below the rock core fixing barrel 9, and the second angle adjusting mechanism 12 is connected with the rock core fixing barrel 9 through a connecting frame 25.
Specifically, the second angle adjusting mechanism 12 includes two fixing plates 8 fixed on the circular horizontal adjusting nut 6, the two fixing plates 8 are arranged at intervals, the top ends of the two fixing plates 8 are respectively fixed with a nut 24, the second angle adjusting mechanism further includes a second adjusting screw 16 penetrating through the two nuts 24 and in threaded connection with the two nuts 24, a semicircular inclination angle adjusting dial 15 is fixed on one fixing plate, a scale value 17 is arranged on the inclination angle adjusting dial 15, a cross-shaped mark is attached to the end part of the second adjusting screw 16, and the lower end of the connecting frame 25 is connected with the middle part of the second adjusting screw 16.
Further, the design is that at least two core fixing screws 13 are arranged on the side wall of the core fixing barrel 9, the core fixing screws 13 penetrate through the core fixing barrel and are in threaded connection with the side wall of the core fixing barrel, and the core fixing screws are symmetrically arranged about the axis of the core fixing barrel.
Referring to fig. 5 and 6, the device further comprises a circular track 33, the track 33 is supported by at least three crack measuring brackets 31, the height of each crack measuring bracket 31 is adjustable, specifically, each crack measuring bracket comprises a sleeve arranged on the base 5 of the demonstration table, the top end of each sleeve is internally connected with a threaded rod, and the track is arranged in each threaded rod 32. The track 33 is arranged around the core fixing cylinder 9, and the core fixing cylinder 9 is positioned at the central position of the track; the section of the track is U-shaped or [ shaped ], a sliding block 34 capable of sliding in the sliding groove is arranged in the sliding groove on the track 33, a through hole is formed in the sliding block 34, an adjusting rod 35 penetrating through the through hole is further included, preferably, the adjusting rod 35 is a telescopic rod with variable length (in the prior art), the adjusting rod 35 can rotate in the through hole, the device further comprises a crack inclination angle measuring device 37 arranged on the outer side wall of the sliding block 34, a scale value is arranged on the crack inclination angle measuring device 37, the adjusting rod 35 penetrates through the center of the crack inclination angle measuring device, and an arrow 38 is arranged on the adjusting rod at the side part of the crack inclination angle measuring device; the device also comprises a C-shaped adjusting fork 36, wherein the adjusting fork 36 is sleeved on the side wall of the core fixing cylinder 9, and the middle part of the adjusting fork is connected with the end part of the adjusting rod.
The first mode of use of this device:
the process for redirecting the paleogeomagnetic rock core by the rock core and fracture paleogeomagnetic redirection demonstration model device comprises the following steps of:
firstly, determining the direction marking line 4, the north orientation of the supporting plate 2 and the adjustment level, determining the geographic north orientation by utilizing the geological compass and the direction marking line 4 on the supporting plate 2, and placing the device in the level by adjusting 4 rotary lifting bases 3.
Secondly, fixing the core; the ancient geomagnetic rock core is fixed in the rock core fixing barrel 9, the top surface of the rock core faces upwards and the bottom surface of the rock core faces downwards during fixing, the superposition alignment of the rock core axis and the rock core fixing barrel 9 axis 10 is ensured, and then the rock core is fixed by adjusting the rock core fixing screw 13.
Then, correcting; specifically, according to the dip angle of the formation shape at the position of the field drilling core, the second angle adjusting mechanism 12 is adjusted, so that the cross-shaped mark on the end part of the second adjusting screw 16 is aligned with the corresponding scale on the dip angle adjusting dial 15.
According to the azimuth angle of the stratum attitude of the field drilling core position, the round horizontal adjusting nut 6 on the first angle adjusting mechanism is adjusted to enable the round horizontal adjusting nut 6 to rotate around the first adjusting screw rod 7, and then the horizontal alignment pointer 19 on the round horizontal adjusting nut 6 is aligned with the scale corresponding to the scale value 21 on the horizontal adjusting dial 23. So far, the redirection process of the drilling core paleo-magnetic sample is completed.
After the demonstration is completed, the core fixing barrel 9 is placed in the horizontal state by rotating the second angle adjusting mechanism 12, and the core is taken down by rotating the core fixing screw 13.
The second mode of use of this device:
the invention relates to a process for redirecting a small sample of field paleo-magnetic by using a core and fracture paleo-magnetic redirection demonstration model device, which specifically comprises the following steps:
firstly, determining a direction marking line 4, the north orientation of a supporting plate 2 and adjusting the level, determining the north orientation of the geography by utilizing a geological compass and the direction marking line 4 on the supporting plate 2, and placing the device in the level by adjusting 4 rotary lifting bases 3.
Next, fix the small sample of the field geomagnetism. Fix the small sample of open-air paleo-magnetic in core fixed cylinder 9, open-air paleo-magnetic small sample top is upwards, the end is down when fixed to guarantee the Z axle marking line of the small sample of open-air paleo-magnetic and the fixed cylinder 9 axis 10 of core and align, then fix the core through adjusting core fixing screw 13.
And secondly, converting the field paleogeomagnetic small sample from a sample coordinate system to a geographic coordinate system. The method can simulate the real situation of the field sampling according to the occurrence of the field paleogeomagnetic small sample during the sampling, and the small sample is restored to the original position during the field sampling just at the beginning.
According to the inclination angle of the output shape of the field paleo-magnetic small sample, the cross-shaped mark on the end part of the second adjusting screw 16 is aligned with the corresponding scale on the inclination angle adjusting dial 15 by adjusting the second angle adjusting mechanism 12; then according to the azimuth angle of the output shape of the field paleo-magnetic small sample, the round horizontal adjusting nut 6 on the first angle adjusting mechanism is adjusted to enable the round horizontal adjusting nut 6 to rotate around the first adjusting screw 7, and then the horizontal alignment pointer 19 on the round horizontal adjusting nut 6 is aligned with the scale corresponding to the scale value 21 on the horizontal adjusting dial 23. So far, the conversion from a sample coordinate system to a geographic coordinate system is realized by the field paleogeomagnetic small sample.
And thirdly, converting the field paleogeomagnetic small sample from a geographic coordinate system to stratum coordinates. According to the dip angle of stratum shape of the sampling position of the field paleo-magnetic small sample, the cross mark on the end part of the second adjusting screw 16 is aligned with the corresponding scale on the dip angle adjusting dial 15 by adjusting the second angle adjusting mechanism 12; according to the azimuth angle of stratum shape of the sampling position of the field paleo-magnetic small sample, the round horizontal adjusting nut 6 on the first angle adjusting mechanism is adjusted to enable the round horizontal adjusting nut 6 to rotate around the first adjusting screw 7, and then the horizontal alignment pointer 19 on the round horizontal adjusting nut 6 is aligned with the scale corresponding to the scale value 21 on the horizontal adjusting dial 23. So far, the conversion from a geographic coordinate system to a stratum coordinate system is realized by the field paleogeomagnetic small sample.
After the demonstration is completed, the core fixing barrel 9 is placed in the horizontal state by rotating the second angle adjusting mechanism 12, and the core is taken down by rotating the core fixing screw 13.
The third mode of use of this device:
utilize rock core and this device demonstration rock core paleo-magnetic small sample's redirection process and crack measurement, specifically include the following step:
firstly, determining a direction marking line 4, the north orientation of a supporting plate 2 and adjusting the level, determining the north orientation of the geography by utilizing a geological compass and the direction marking line 4 on the supporting plate 2, and placing the device in the level by adjusting 4 rotary lifting bases 3.
Next, the core is secured. First, the cracks on the core are traced once with a stylus, and for those cracks that do not penetrate the core, the cracks are propagated along the crack to the sides of the core with the stylus, the middle of the crack is drawn with a ruler according to the highest and lowest points of the core crack and is traced with the stylus. Secondly, fixing the core paleo-magnetic sample in the core fixing barrel 9, wherein the top surface of the core paleo-magnetic sample faces upwards and the bottom surface of the core paleo-magnetic sample faces downwards during fixing, and guaranteeing that a Z-axis marking line of the core paleo-magnetic sample is aligned with the axis 10 of the core fixing barrel 9, and then fixing the core by adjusting the core fixing screw 13.
And converting the core paleogeomagnetic sample from a geographic coordinate system to a stratum coordinate system. According to the dip angle of the stratum shape of the field drilling core position, the cross mark on the end part of the second adjusting screw 16 is aligned with the corresponding scale on the dip angle adjusting dial 15 by adjusting the second angle adjusting mechanism 12; then according to the azimuth angle of the output shape of the field paleo-magnetic small sample, the round horizontal adjusting nut 6 on the first angle adjusting mechanism is adjusted to enable the round horizontal adjusting nut 6 to rotate around the first adjusting screw 7, and then the horizontal alignment pointer 19 on the round horizontal adjusting nut 6 is aligned with the scale corresponding to the scale value 21 on the horizontal adjusting dial 23. So far, the redirection process of the drilling core paleo-magnetic sample is completed.
After the rock core is corrected to the stratum coordinate system from the geographic coordinate system, the center of the track 33 and the center position of the rock core crack are overlapped by adjusting 4 crack measuring brackets 31, the ring center on the adjusting fork 36 and the center position of the rock core crack are positioned on the same horizontal plane by adjusting the telescopic adjusting rod 35 and the adjusting fork 36 with variable lengths, the ring center on the adjusting fork 36 and the plane where the rock core crack (the rock core crack is positioned at the middle position of the rock core and is a transverse crack) are positioned on the same position by manually and directly adjusting the adjusting fork, and at the moment, the trend size on the track 33 and the dip angle on the crack dip angle measuring device 37 are read.
Finally, after the measurement is completed, the device is restored to the original state.
In conclusion, 1, the device can better help understand the process of redirecting the paleogeomagnetic core, and greatly improves the use of the paleogeomagnetic core redirecting method; 2. for a borehole core paleogeomagnetic sample, an abstract borehole core redirection process can be embodied, and the specific orientation of the fracture can be determined. The method helps understand the complex process of redirecting the core by the paleogeomagnetic method, improves the utilization rate of the method, and has important value for correctly processing paleogeomagnetic data and finding ores in the later period. 3. For the open-air paleo-magnetic small sample with outcrop, the specific process of how the open-air paleo-magnetic small sample is converted from the sample coordinate system to the geographic coordinate system and from the geographic coordinate system to the stratum coordinate system can be simulated truly. The redirection process of the small sample of the field geomagnetism is fully understood, and the process of the data processing of the geomagnetism is clearer and more thorough.
The embodiments of the present invention are disclosed as preferred embodiments, but not limited thereto, and those skilled in the art will readily appreciate from the foregoing description that various extensions and modifications can be made without departing from the spirit of the present invention.
Claims (6)
1. A model device for redirecting and demonstrating the paleogeomagnetism of a rock core and a fracture comprises a supporting plate; the method is characterized in that: the support plate is provided with an upright support rod, the demonstration table comprises a demonstration table base, the demonstration table base is arranged on the support rod in a suspended manner through a cross rod, a first angle adjusting mechanism capable of adjusting the rotation angle on the horizontal plane is arranged on the demonstration table base, the demonstration table further comprises a core fixing barrel for placing a core, the upper end of the core fixing barrel is provided with an opening, a second angle adjusting mechanism capable of adjusting the rotation angle on the longitudinal plane is arranged below the core fixing barrel, the second angle adjusting mechanism is connected with the core fixing barrel through a connecting frame, and the second angle adjusting mechanism is connected above the first angle adjusting mechanism;
the first angle adjusting mechanism comprises a first adjusting screw rod arranged on the base of the demonstration table and a round horizontal adjusting nut sleeved on the first adjusting screw rod in a threaded manner, the round horizontal adjusting nut rotates around the first adjusting screw rod, a round horizontal adjusting dial is arranged on the core demonstration table, scale values are arranged on the horizontal adjusting dial, and a horizontal alignment pointer is arranged on the round horizontal adjusting nut; the second angle adjusting mechanism is arranged on the round horizontal adjusting nut; the second angle adjusting mechanism comprises two fixed plates fixed on the round horizontal adjusting nut, the two fixed plates are arranged at intervals, two ends of the two fixed plates are respectively fixed with a nut, the second angle adjusting mechanism also comprises a second adjusting screw rod penetrating through the two nuts and in threaded connection with the two nuts, a semicircular inclination angle adjusting dial is arranged on one fixed plate, scale values are arranged on the inclination angle adjusting dial, a cross-shaped mark is attached to the end part of the second adjusting screw rod, and the lower end of the connecting frame is connected with the middle part of the second adjusting screw rod;
the device comprises a rock core fixing barrel, a circular track and a crack measuring bracket, wherein the circular track is supported by the at least three crack measuring brackets, the track is arranged around the rock core fixing barrel, and the rock core fixing barrel is positioned at the central position of the track; the sliding groove on the track is internally provided with a sliding block capable of sliding in the sliding groove, the sliding block is provided with a through hole, the sliding block further comprises an adjusting rod penetrating through the through hole, the sliding block further comprises a crack inclination angle measuring device arranged on the outer side wall of the sliding block, the crack inclination angle measuring device is provided with scale values, the adjusting rod penetrates through the center of the crack inclination angle measuring device, and an arrow is arranged on the adjusting rod at the side part of the crack inclination angle measuring device; the adjusting fork is sleeved on the side wall of the rock core fixing cylinder, and the middle part of the adjusting fork is connected with the end part of the adjusting rod.
2. The core and fracture paleo-magnetic redirection demonstration model device of claim 1, wherein: the side wall of the rock core fixing barrel is provided with at least two rock core fixing screws, the rock core fixing screws penetrate through the rock core fixing barrel and are in threaded connection with the side wall of the rock core fixing barrel, and the rock core fixing screws are symmetrically arranged relative to the axis of the rock core fixing barrel.
3. The core and fracture paleo-magnetic redirection demonstration model device of claim 1, wherein: the supporting plate is provided with a direction marking line with an arrow.
4. The core and fracture paleo-magnetic redirection demonstration model device of claim 1, wherein: the four corners of the supporting plate are respectively provided with a rotary lifting base, and the rotary lifting bases are screw rods and are in threaded connection with the supporting plate.
5. The core and fracture paleo-magnetic redirection demonstration model device of claim 1, wherein the cross section of the track is U-shaped or [ shaped.
6. The core and fracture paleo-magnetic redirection demonstration model device of claim 1, the fracture measurement support being height-adjustable.
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| CN113281401B (en) * | 2021-04-29 | 2022-08-19 | 同济大学 | Detection method, system and device for hidden diseases of ballastless track |
| CN113482592A (en) * | 2021-05-20 | 2021-10-08 | 东华理工大学 | Directional recovery method for well core, fracture and magnetic structure |
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