CN102830051A - Rock mass fracture occurrence recognizing system in oscillation testing system - Google Patents
Rock mass fracture occurrence recognizing system in oscillation testing system Download PDFInfo
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Abstract
The invention discloses a rock mass fracture occurrence recognizing system in an oscillation testing system. The rock mass fracture occurrence recognizing system comprises an underground drilling image recognition orientating system, a cable counting winch system and a PDA (personal digital assistant) data acquisition system, wherein output ends/input ends of the underground drilling image recognition orientating system and the cable counting winch system are respectively connected with the input end/output end of the PDA data acquisition system correspondingly. With the adoption of the system, fracture images and position and depth data can be obtained through the underground drilling image recognition orientating system and the cable counting winch system, thereby the fracture occurrence of fractured rock mass is obtained, and reliable basic geologic information is provided for determining permeability coefficient tensors for having oscillation tests in the fractured rock mass.
Description
Technical Field
The invention relates to an oscillation test system in the field of hydrogeology, in particular to an identification system for identifying the fracture occurrence of a rock mass.
Background
The permeability of rock mass is an important problem related to scientific research in many engineering construction and subject fields, especially the permeability of inhomogeneous anisotropic fractured rock mass is an important parameter which must be mastered in engineering design, construction and operation of dam foundation, side slope, tunnel and the like. Meanwhile, the research on the interaction of engineering structures, foundations and underground water and the coupling effect of stress fields, temperature fields, seepage fields and chemical fields also needs to quantitatively determine the permeability of rock masses.
The permeability coefficient tensor of the anisotropic fractured rock mass is accurately determined through a test means, wherein the development condition of the fractures in the drill holes is accurately obtained, and the important importance is to master the geometrical characteristics of the fracture, such as the occurrence state, the width and the like. At present, great errors exist in determination of geometrical characteristics of cracks in a drilled hole, and determination is difficult, so that the reliability of calculated permeability coefficient tensor of the anisotropic fractured rock mass is greatly reduced.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to solve the problems in the prior art, and provides a rock mass fracture occurrence identification system which can acquire fracture images in a drill hole in real time, can determine the acquired fracture image orientation and automatically calculate fracture occurrence, can be integrated with a pressure sensor and a temperature sensor in an oscillation test system to work, and can directly provide basic geological information for rapidly and accurately determining permeability coefficient tensor for carrying out an oscillation test in a fractured rock mass.
The technical scheme is as follows: in order to achieve the above object, the present invention provides a rock mass fracture occurrence identification system in an oscillation test system, comprising: the system comprises an underground drilling image identification and orientation system, a cable counting winch system and a PDA data acquisition system; the underground drilling image identification and orientation system and the cable counting winch system are respectively connected with the PDA data acquisition system correspondingly;
the underground drilling image identification and orientation system finds the cracks in the drilling holes, can determine the positions of the cracks and transmits position data of the cracks to the PDA data acquisition system;
the cable counting winch system provides fracture position depth data for calculating fracture occurrence, and transmits the fracture position depth data to the PDA data acquisition system;
the PDA data acquisition system calculates fracture occurrence, and provides basic geological information for the rapid and accurate determination of permeability coefficient tensor in the fractured rock mass by carrying out an oscillation test.
The downhole borehole image recognition orientation system comprises: the device comprises a camera with a holder, an electronic compass and a data processing and transmitting module; the camera with the holder and the electronic compass are respectively and correspondingly connected with the data processing and transmitting module of the image identification and orientation system; the data processing and transmitting module of the image identification and orientation system is correspondingly connected with the PDA data acquisition system;
the cable counting winch system comprises: the device comprises a data transmission interface, a base, a low-speed motor, a bracket, a phototriode, a light-emitting diode, a light hole, a cable, a wire pressing disc and a photoelectric coded disc;
the cable counting winch system is fixed on the base, the upper end of the cable is connected with the PDA data acquisition system, then the cable penetrates through the space between the wire pressing disc and the photoelectric coded disc, the cable is driven to move downwards by the low-speed motor, and the lower end of the cable is connected with the underground drilling image identification and orientation system; eight light holes are formed in the photoelectric coded disc, the light emitting diode is arranged on the fixed support on the left side of the photoelectric coded disc, the phototriode is arranged on the fixed support on the right side of the photoelectric coded disc, the light emitting diode and the phototriode are located on the same axis, and the phototriode is connected with the data transmission interface.
The PDA data acquisition system comprises: the host and the PDA acquire a system data input/output port; the data input/output port of the host is connected with the data input/output port of the PDA acquisition system.
The working principle of the invention is as follows: the rock mass fracture occurrence identification system in the oscillation test system firstly carries out underground drilling, then the underground drilling hole image identification and orientation system is deeply drilled into the drilling hole, the camera controlled by the cloud platform is used for finding the cracks in the rock mass, then the depth of the crack at the position is measured by using a light pulse depth counter in a cable counting winch system, and the basic principle of determining one surface by using three points in geometry is utilized, the camera with the holder control is used for selecting three points at different positions on the crack when the crack is found, the point position is determined by the electronic compass, and meanwhile, the position depth of the point is determined by a cable counting winch, the data is transmitted to a PDA data acquisition system, the PDA data acquisition system calculates the fracture occurrence, and basic geological information is provided for the rapid and accurate determination of the permeability coefficient tensor of the fractured rock mass by carrying out the oscillation test.
Has the advantages that: compared with the prior art, the invention has the following advantages:
the method can be integrated with pressure and temperature sensors in an oscillation test system to work, accurately and quickly identify the fracture occurrence of the rock mass, and directly provide reliable basic geological information for determining the permeability coefficient tensor of the fractured rock mass in the oscillation test.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a schematic diagram of the fracture occurrence determination principle of the underground borehole image recognition and orientation system.
FIG. 3 is a schematic view of a portion of the cable counting winch system of the present invention.
FIG. 4 is a schematic view of a portion of the cable counting winch system of the present invention.
Fig. 5 is a circuit diagram of the working principle of the electronic compass.
Fig. 6 is a circuit diagram of the working principle of the camera.
Fig. 7 is a circuit diagram of the working principle of the micro cloud platform stepping motor.
The specific implementation mode is as follows:
the present invention is further illustrated by the following figures and specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, which is to be given the full breadth of the appended claims and any and all equivalent modifications thereof which may occur to those skilled in the art upon reading the present specification.
Examples
A rock mass fracture occurrence identification system in an oscillatory testing system as shown in figure 1, comprising: the system comprises an underground drilling image identification and orientation system 1, a cable counting winch system 2 and a PDA data acquisition system 3; the underground drilling image identification and orientation system and the cable counting winch system are respectively connected with the PDA data acquisition system correspondingly; the underground drilling image recognition and orientation system 1 finds the crack 4 in the drilling hole, can determine the position of the crack, and transmits the position data of the crack to the PDA data acquisition system; the cable counting winch system 2 provides fracture position depth data for calculating fracture occurrence, and transmits the fracture position depth data to the PDA data acquisition system; the PDA data acquisition system 3 calculates fracture occurrence, and provides basic geological information for the rapid and accurate determination of permeability coefficient tensor in the fractured rock mass by carrying out an oscillation test.
In this embodiment, the system for identifying and orienting borehole images comprises: the device comprises a camera with a holder, an electronic compass and a data processing and transmitting module; the camera with the holder and the electronic compass are respectively and correspondingly connected with the data processing and transmitting module of the image identification and orientation system; the data processing and transmitting module of the image identification and orientation system is correspondingly connected with the PDA data acquisition system.
The cable counting winch system in the embodiment comprises: the device comprises a data transmission interface 8, a base 9, a low-speed motor 10, a bracket 11, a phototriode 12, a light-emitting diode 13, a light hole 14, a cable 15, a wire pressing disc 16 and a photoelectric coded disc 17 (shown in figures 3 and 4); the upper end of the cable 15 is connected with the PDA data acquisition system 3, then the cable passes through a wire pressing disc 16 and a photoelectric coded disc 17, the low-speed motor 10 drives the cable 15 to move downwards, and the lower end of the cable 15 is connected with the underground drilling image identification and orientation system 1; eight light holes 14 are formed in the photoelectric coded disc 17, a light emitting diode 13 is arranged on a fixed support on the left side of the photoelectric coded disc 17, the light emitting diode 13 is always in a power-on light-emitting state, a phototriode 12 is arranged on a fixed support on the right side of the photoelectric coded disc 17, the light emitting diode 13 and the phototriode 12 are on the same axis, and the phototriode 12 is connected with a data transmission interface 8; when the photoelectric code disc 17 rotates along with the low-speed motor 10, the light emitted by the light emitting diode 13 can radiate optical signals on the phototriode 12 along with the eight light holes 14 in sequence, when the PN pole with photosensitive characteristic in the phototriode 12 is radiated by light, a photocurrent is formed, the generated photocurrent enters the emitter from the base, and a signal current which is amplified by beta times is obtained in the collector circuit. The amplified signal current is connected to a data output interface of a PDA acquisition system through a data transmission interface 8, the PDA acquisition system can obtain eight pulses every turn of a photoelectric coded disc 17, and depth data can be obtained through calculation according to the total pulse number, the diameter of the photoelectric coded disc and the diameter of a cable.
In the embodiment, the camera with the holder preferably adopts a miniature camera with a front light source, and the working range of the camera with the holder is 0-360 degrees horizontally and 0-90 degrees vertically; the electronic compass controls the tripod head on the camera with the tripod head, adopts one-key reset under the condition of unknown azimuth, ensures that the camera with the tripod head is consistent with the true north of the location, and can clearly display the direction angle of the camera with the tripod head in the drill hole on the display screen.
In this embodiment, the underground borehole image recognition and orientation system determines the orientations of three points on a certain fracture through a compass after a crack is found in a borehole by using a camera, determines the depths of the three points through a cable counting winch system, and automatically calculates the attitude (inclination and dip angle) of the crack according to the geometric principle that three points determine one surface, and the specific calculation method is as follows:
given a borehole radius of r, the 5 coordinate is (r cos α)1，r sin α1，c1) 6 coordinate is (r cos alpha)2，r sin α2，c2) And 7 has the coordinate of (r cos alpha)3，r sin α3，c3) Then, then <math>
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</math> Wherein,
x1＝r cos α1-r cos α2；y1＝r sin α1-r sin α2；z1＝c1-c2；+x2＝r cos α1-r cos α3“y2＝r sin α1-r sin α3；z2＝c1-c3.+
wherein,
in the formula,' alpha1，α2，α3Azimuth angles 1 c of 5, 6 and 7, respectively1，c2，c3Depth of 5, 6, 7, respectively, c0Is a and c1，c2，c3Any depth value that is not equal; alpha is the inclination angle of the crack surface; β is a tendency of a crack surface. +
The invention is realized in such a way that after underground equipment enters a borehole, the direction of a camera is unknown due to the twisting of a cable or an operator to the cable, the direction of the camera can be adjusted to the true north direction of the place through the control of an electronic guide to a tripod head, then a control signal is output to the tripod head through the electronic guide, the horizontal 360-degree panoramic geological structure information in the borehole can be observed on a display screen of a host computer of a PDA data acquisition system, meanwhile, a light pulse depth counter transmits the depth information of the camera in the borehole to the PDA data acquisition system through a control cable and displays the information, when a crack is observed at a certain depth, the crack geological information (depth, direction and width) is captured and stored, and the production state of the crack is calculated by the PDA data acquisition system.
Claims (3)
1. The utility model provides a rock mass crack occurrence identification system among vibration test system which characterized in that: the method comprises the following steps: the system comprises an underground drilling image identification and orientation system (1), a cable counting winch system (2) and a PDA data acquisition system (3); the underground drilling image identification and orientation system and the cable counting winch system are respectively connected with the PDA data acquisition system correspondingly;
the underground drilling image identification and orientation system (1) finds cracks in the drilling holes, can determine the positions of the cracks and transmits position data of the cracks to the PDA data acquisition system;
the cable counting winch system (2) provides fracture position depth data for calculating fracture occurrence, and transmits the fracture position depth data to the PDA data acquisition system;
the PDA data acquisition system (3) calculates fracture occurrence, and provides basic geological information for rapid and accurate determination of permeability coefficient tensor in a fractured rock mass by carrying out an oscillation test.
2. A rock mass fracture occurrence identification system in an oscillatory testing system, in accordance with claim 1, wherein:
the downhole borehole image recognition orientation system comprises: the device comprises a camera with a holder, an electronic compass and a data processing and transmitting module; the camera with the holder and the electronic compass are respectively and correspondingly connected with the data processing and transmitting module of the image identification and orientation system; the data processing and transmitting module of the image identification and orientation system is correspondingly connected with the PDA data acquisition system;
the cable counting winch system comprises: the device comprises a data transmission interface, a base, a low-speed motor, a bracket, a phototriode, a light-emitting diode, a light hole, a cable, a wire pressing disc and a photoelectric coded disc;
the cable counting winch system is fixed on the base, the upper end of the cable is connected with the PDA data acquisition system, then the cable penetrates through the space between the wire pressing disc and the photoelectric coded disc, the cable is driven to move downwards by the low-speed motor, and the lower end of the cable is connected with the underground drilling image identification and orientation system; eight light holes are formed in the photoelectric coded disc, the light emitting diode is arranged on the fixed support on the left side of the photoelectric coded disc, the phototriode is arranged on the fixed support on the right side of the photoelectric coded disc, the light emitting diode and the phototriode are located on the same axis, and the phototriode is connected with the data transmission interface.
3. A rock mass fracture occurrence identification system in an oscillatory testing system, in accordance with claim 1, wherein: the PDA data acquisition system comprises: the host and the PDA acquire a system data input/output port; the data input/output port of the host is connected with the data input/output port of the PDA acquisition system.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103983228A (en) * | 2014-06-04 | 2014-08-13 | 长江工程地球物理勘测武汉有限公司 | Method for measuring borehole fracture attitude by use of electronic rock core |
| CN109374497A (en) * | 2018-10-29 | 2019-02-22 | 河海大学 | A kind of rock micropore structure test method |
| CN109882156A (en) * | 2019-04-01 | 2019-06-14 | 四川大学 | A kind of drill hole information acquisition method and device based on DIC technology |
| CN110243254A (en) * | 2019-05-09 | 2019-09-17 | 湖州华科建设工程质量检测有限公司 | A kind of construction project crack detection system |
| CN110318807A (en) * | 2019-06-24 | 2019-10-11 | 太原理工大学 | Determine the endoscope orientation system and its application method of crack attitude in drilling |
| CN111830030A (en) * | 2020-03-27 | 2020-10-27 | 中国恩菲工程技术有限公司 | Investigation system and method for joint fracture of mine rock mass |
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| CN111830030A (en) * | 2020-03-27 | 2020-10-27 | 中国恩菲工程技术有限公司 | Investigation system and method for joint fracture of mine rock mass |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20170608 |