CN102830051A - Rock mass fracture occurrence recognizing system in oscillation testing system - Google Patents

Abstract

The invention discloses a system for identifying the occurrence of rock mass fissures in an oscillation test system, which includes: an downhole borehole image recognition and orientation system, a cable counting drawworks system, and a PDA data acquisition system; the downhole borehole image recognition and orientation system 1. The output/input ends of the cable counting winch system are respectively connected to the input/output ends of the PDA data acquisition system; the system of the present invention can obtain the crack image and position depth through the downhole borehole image recognition orientation system and the cable counting winch system Data, so as to obtain the fracture occurrence of fractured rock mass, and provide reliable basic geological information for carrying out oscillation tests in fractured rock mass to determine the permeability coefficient tensor.

Description

An Occurrence Identification System of Rock Mass Fissures in Oscillation Test System

technical field

The invention relates to an oscillation test system in the field of hydrogeology, in particular to an identification system for identifying the occurrence of rock mass fissures.

Background technique

The permeability of rock mass is an important issue involved in many engineering constructions and scientific research in disciplines, especially the permeability of heterogeneous anisotropic fractured rock mass is an important issue in the design, construction and operation of dam foundations, slopes, tunnels and other projects. important parameters that must be mastered. At the same time, to study the interaction of engineering structures, foundations and groundwater, as well as the coupling effects of stress field, temperature field, seepage field and chemical field, it is also necessary to quantitatively determine the permeability of rock mass.

In order to accurately determine the permeability coefficient tensor of anisotropic fractured rock mass through experimental means, it is very important to accurately obtain the development of fractures in boreholes, and to grasp the geometric characteristics of fractures such as their occurrence and width. At present, there are large errors and difficulties in determining the geometric characteristics of fractures in boreholes, which greatly reduces the reliability of the calculated permeability coefficient tensor of anisotropic fractured rock mass.

Contents of the invention

Purpose of the invention: the purpose of the present invention is to solve the problems in the prior art, to provide a kind of rock mass crack occurrence recognition that can not only collect the crack image in the borehole in real time, but also can determine the orientation of the crack image and automatically calculate the crack occurrence At the same time, it can be integrated with the pressure and temperature sensors in the vibration test system to directly provide basic geological information for the determination of the permeability coefficient tensor by the vibration test in the fractured rock mass quickly and accurately.

Technical solution: In order to achieve the above objectives, the present invention provides a system for identifying the occurrence of rock mass fissures in an oscillation test system, including: an underground borehole image recognition and orientation system, a cable counting winch system and a PDA data acquisition system; the underground The drilling image recognition and orientation system, the cable counting winch system are respectively connected with the corresponding PDA data acquisition system;

The downhole borehole image recognition and orientation system finds cracks in the borehole and can determine the orientation of the cracks, and transmits the orientation data of the cracks to the PDA data acquisition system;

The cable counting winch system provides the position and depth data of the crack for calculating the crack occurrence, and transmits the position and depth data of the crack to the PDA data acquisition system;

The PDA data acquisition system calculates the occurrence of fissures, and quickly and accurately provides basic geological information for carrying out oscillation tests in fissure rock mass to determine the permeability coefficient tensor.

The downhole drilling image recognition and orientation system includes: a camera with a cloud platform, an electronic compass and a data processing and transmission module; the camera and the electronic compass with a cloud platform are respectively connected to the data processing and transmission module of the image recognition and orientation system; The data processing and transmission module of the identification and orientation system is connected with the PDA data acquisition system correspondingly;

The cable counting winch system includes: a data transmission interface, a base, a low-speed motor, a bracket, a photosensitive transistor, a light-emitting diode, a light hole, a cable, a pressure plate, and a photoelectric code plate;

The cable counting winch system is fixed on the base, and the upper end of the cable is connected with the PDA data acquisition system, and then passes between the crimping plate and the photoelectric code plate, and the low-speed motor drives the cable to move downward, and the lower end of the cable is identified with the downhole drilling image The orientation system is connected; there are eight light-transmitting holes on the photoelectric code disc, there are light-emitting diodes on the fixed bracket on the left side of the photoelectric code disc, and there are photosensitive transistors, light-emitting diodes and photosensitive triodes on the fixed bracket on the right side of the photoelectric code disc On the same axis, the phototransistor is connected with the data transmission interface.

The PDA data acquisition system includes: a host computer and a data input/output port of the PDA acquisition system; the data input/output port of the host computer is connected with the data output/input port of the PDA acquisition system.

The working principle of the present invention is as follows: the rock mass fissure occurrence recognition system in an oscillation test system of the present invention first performs downhole drilling, and then the downhole drilling image recognition and orientation system goes deep into the borehole, and is controlled by a cloud platform. The camera finds the cracks in the rock mass, and then uses the optical pulse depth counter in the cable counting winch system to measure the depth of the cracks, and then uses the basic principle of three points in geometry to determine a surface, and uses the belt cloud at the position where the cracks are found. The camera controlled by the station selects three points in different positions on the crack, determines the point position through the electronic compass, and at the same time determines the position and depth of the point through the cable counting winch, and transmits the data to the PDA data acquisition system. The PDA data acquisition system calculates the crack production It can quickly and accurately provide basic geological information for determining the permeability coefficient tensor through oscillation tests in fractured rock mass.

Beneficial effect: compared with the prior art, the present invention has the following advantages:

The invention can work integrated with the pressure and temperature sensors in the oscillation test system, accurately and quickly identify the occurrence of rock mass fissures, and directly provide reliable basic geological information for determining the permeability coefficient tensor by carrying out oscillation tests in the fractured rock mass.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic diagram of the principle of determining the occurrence of fractures by the downhole borehole image recognition and orientation system of the present invention.

Fig. 3 is a partial structural diagram of the cable counting winch system in the present invention.

Fig. 4 is a partial structural diagram of the cable counting winch system in the present invention.

Figure 5 is a circuit diagram of the working principle of the electronic compass.

Figure 6 is a circuit diagram of the working principle of the camera.

Figure 7 is a circuit diagram of the working principle of the stepping motor of the miniature pan-tilt.

Detailed ways:

Below in conjunction with accompanying drawing and specific embodiment, further illustrate the present invention, should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention, after reading the present invention, those skilled in the art will understand various aspects of the present invention All modifications of the valence form fall within the scope defined by the appended claims of the present application.

Example

A rock mass fissure occurrence recognition system in an oscillation test system as shown in Figure 1, comprising: downhole borehole image recognition orientation system 1, cable counting drawworks system 2 and PDA data acquisition system 3; described downhole borehole image The identification and orientation system and the cable counting winch system are respectively connected to the corresponding PDA data acquisition system; the downhole borehole image recognition and orientation system 1 finds the crack 4 in the borehole and can determine the orientation of the crack, and transmits the orientation data of the crack To the PDA data acquisition system; the cable counting winch system 2 provides the position depth data of the crack for calculating the crack occurrence, and the position depth data of the crack is transmitted to the PDA data acquisition system; the PDA data acquisition system 3 calculates The occurrence of fractures provides basic geological information for the determination of the permeability coefficient tensor by performing oscillation tests in fractured rock mass quickly and accurately.

The downhole drilling image recognition and orientation system described in this embodiment includes: a camera with a cloud platform, an electronic compass and a data processing transmission module; the camera with a cloud platform and an electronic compass are respectively corresponding to the data processing and transmission module of the image recognition and orientation system Connecting; the data processing and transmission module of the image recognition and orientation system is correspondingly connected with the PDA data acquisition system.

The cable counting winch system described in this embodiment includes: a data transmission interface 8, a base 9, a low-speed motor 10, a bracket 11, a phototransistor 12, a light-emitting diode 13, a light-transmitting hole 14, a cable 15, a pressure plate 16, and a photoelectric code Disc 17 (as shown in Figure 3 and Figure 4); the upper end of the cable 15 is connected to the PDA data acquisition system 3, and then passes between the crimping disc 16 and the photoelectric code disc 17, and the cable 15 is driven downward by the low-speed motor 10 Movement, the lower end of cable 15 links to each other with downhole borehole image recognition orientation system 1; There are eight light-transmitting holes 14 above the photoelectric code disc 17, and the fixed bracket on the left side of the photoelectric code disc 17 has light-emitting diodes 13, and the light-emitting diodes 13 are always Be in energized light-emitting state, there is phototransistor 12 on the fixed bracket on the right side of photoelectric code disc 17, light-emitting diode 13 and phototransistor 12 are on the same axis, phototransistor 12 links to each other with data transmission interface 8; When photoelectric code disc 17 When the low-speed motor 10 rotates, the light emitted by the light-emitting diode 13 will sequentially radiate the light signal on the phototransistor 12 along with the eight light-transmitting holes 14. When the PN pole with photosensitive characteristics in the phototransistor 12 receives light radiation, A photocurrent is formed, and the resulting photocurrent enters the emitter from the base, so that a signal current amplified by β times is obtained in the collector circuit. The amplified signal current is connected to the data output interface of the PDA acquisition system through the data transmission interface 8, and the PDA data acquisition system can obtain eight pulses according to the photoelectric code disc 17 per revolution, according to the total number of pulses, the diameter of the photoelectric code disc Depth data is calculated from the cable diameter.

The camera with the cloud platform described in the present embodiment preferably adopts the micro-camera that front light source is arranged, and the working range of the camera with the cloud platform is horizontally to 0-360 degree, vertically 0-90 degree; The pan/tilt on the camera is controlled, and one-key reset is adopted when the orientation is unknown to ensure that the camera with the pan/tilt is consistent with the true north of the location, and the direction angle of the camera with the pan/tilt in the borehole is displayed on the display clearly displayed on the screen.

In this embodiment, the downhole borehole image recognition and orientation system uses a camera to find a crack in the borehole, then uses a compass to determine the orientation of three points on a certain crack, and then uses the cable counting winch system to determine the three points respectively. Depth, according to the geometric principle of determining a surface by three points, the occurrence (inclination, inclination) of the crack is automatically calculated. The specific calculation method is as follows:

Given that the borehole radius is r, the 5-coordinate is (r cos α ₁ , r sin α ₁ , c ₁ ), the 6-coordinate is (r cos α ₂ , r sin α ₂ , c ₂ ), and the 7-coordinate is (r cos α ₃ , r sin α ₃ , c ₃ ), then $\cos \mathrm{\&alpha;}=\frac{\left|\begin{array}{cc}{x}_1& {\mathrm{the\; y}}_1\\ x_2& {\mathrm{the\; y}}_2\end{array}\right|}{\sqrt{{\left|\begin{array}{cc}{\mathrm{the\; y}}_1& {\mathrm{<figure-callout\; id="1"\; label="z"\; filenames="HDA00001742182800051.png"\; state="\{\{state\}\}">z</figure-callout>}}_1\\ {\mathrm{the\; y}}_2& z_2\end{array}\right|}^2+{\left|\begin{array}{cc}{z}_1& x_1\\ z_2& x_2\end{array}\right|}^2{+\left|\begin{array}{cc}{x}_1& {\mathrm{the\; y}}_1\\ x_2& {\mathrm{the\; y}}_2\end{array}\right|}^2}},$ in,

x ₁ =r cos α ₁ -r cos α ₂ ; y ₁ =r sin α ₁ -r sin α ₂ ; z ₁ =c ₁ -c ₂ ; +x ₂ =r cos α ₁ -r cos α ₃ "y ₂ =r sin α ₁ -r sin α ₃ ; z ₂ =c ₁ -c ₃ .+

$\mathrm{<span\; class="notranslate">\; cos</span>}\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; A</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}<span\; class="notranslate">\; ,</span>$ $\mathrm{<span\; class="notranslate">\; sin</span>}\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; B</span>}}{\mathrm{<span\; class="notranslate">\; R</span>}}$

in, $A=\frac{-\mathrm{ac}}{a^2+b^2}(c_0-c_1),$ $B=\frac{-\mathrm{bc}}{a^2+b^2}(c_0-c_1),R=\sqrt{A^2+B^2},$

$\mathrm{<span\; class="notranslate">\; a</span>}<span\; class="notranslate">\; =</span>\left|\begin{array}{cc}{\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}& {\mathrm{<span\; class="notranslate">\; <figure-callout\; id="1"\; label="z"\; filenames="HDA00001742182800051.png"\; state="\{\{state\}\}">z</figure-callout></span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}\\ {\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}& {\mathrm{<span\; class="notranslate">\; z</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\end{array}\right|<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; b</span>}<span\; class="notranslate">\; =</span>\left|\begin{array}{cc}{\mathrm{<span\; class="notranslate">\; z</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}& {\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}\\ {\mathrm{<span\; class="notranslate">\; z</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}& {\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\end{array}\right|<span\; class="notranslate">\; ,</span>\mathrm{<span\; class="notranslate">\; c</span>}<span\; class="notranslate">\; =</span>\left|\begin{array}{cc}{\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}& {\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 1</span>}}\\ {\mathrm{<span\; class="notranslate">\; x</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}& {\mathrm{<span\; class="notranslate">\; the\; y</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}\end{array}\right|<span\; class="notranslate">\; .</span>$

In the formula "α ₁ , α ₂ , α ₃ are the azimuth angles of 5, 6, 7 respectively 1 c ₁ , c ₂ , c ₃ are the depths of 5, 6, 7 respectively, c ₀ is the depth with c ₁ , c ₂ , Any depth value ranging from c _{to 3} ; α is the inclination angle of the fracture surface; β is the inclination of the fracture surface.+

The purpose of the present invention is achieved in this way. After the downhole equipment enters the borehole, the direction of the camera is unknown due to the twisting of the cable or the operator. Adjust the direction to the true north of the location, and then output control signals to the PTZ through the electronic guide, and you can observe the horizontal 360-degree panoramic geological structure information in the borehole on the display screen of the host computer of the PDA data acquisition system, and at the same time, the optical pulse depth The counter transmits the depth information of the camera in the borehole to the PDA data acquisition system through the control cable and displays it. When a fracture is observed at a certain depth, it captures and saves the geological information of the fracture (depth, orientation and width), and is controlled by the PDA. The data acquisition system calculates the occurrence of this crack.

Claims (3)

1. A system for identifying the occurrence of rock mass fissures in an oscillation test system, characterized in that it includes: an downhole drilling image recognition and orientation system (1), a cable counting winch system (2) and a PDA data acquisition system (3); The downhole drilling image recognition and orientation system and the cable counting winch system are respectively connected with the corresponding PDA data acquisition system; The downhole borehole image recognition and orientation system (1) finds cracks in the borehole and can determine the orientation of the cracks, and transmits the orientation data of the cracks to the PDA data acquisition system; The cable counting winch system (2) provides the position and depth data of the crack for calculating the crack occurrence, and transmits the position and depth data of the crack to the PDA data acquisition system; The PDA data acquisition system (3) calculates the occurrence of fissures, and quickly and accurately provides basic geological information for carrying out oscillation tests in fractured rock mass to determine the permeability coefficient tensor. 2. The rock mass crack occurrence identification system in a kind of vibration test system according to claim 1, is characterized in that: The downhole drilling image recognition and orientation system includes: a camera with a cloud platform, an electronic compass and a data processing and transmission module; the camera and the electronic compass with a cloud platform are respectively connected to the data processing and transmission module of the image recognition and orientation system; The data processing and transmission module of the identification and orientation system is connected with the PDA data acquisition system correspondingly; The cable counting winch system includes: a data transmission interface, a base, a low-speed motor, a bracket, a photosensitive transistor, a light-emitting diode, a light hole, a cable, a pressure plate, and a photoelectric code plate; The cable counting winch system is fixed on the base, and the upper end of the cable is connected with the PDA data acquisition system, and then passes between the crimping plate and the photoelectric code plate, and the low-speed motor drives the cable to move downward, and the lower end of the cable is identified with the downhole drilling image The orientation system is connected; there are eight light-transmitting holes on the photoelectric code disc, there are light-emitting diodes on the fixed bracket on the left side of the photoelectric code disc, and there are photosensitive transistors, light-emitting diodes and photosensitive triodes on the fixed bracket on the right side of the photoelectric code disc On the same axis, the phototransistor is connected with the data transmission interface. 3. the rock mass fissure occurrence identification system in a kind of oscillation test system according to claim 1, is characterized in that: described PDA data acquisition system comprises: host computer, PDA acquisition system data input/output port; Described host computer The data input/output port of the PDA is connected with the data output/input port of the PDA acquisition system.

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