WO2021134929A1 - Système de surveillance et procédé de surveillance d'activation de structure à deux paramètres - Google Patents

Système de surveillance et procédé de surveillance d'activation de structure à deux paramètres Download PDF

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Publication number
WO2021134929A1
WO2021134929A1 PCT/CN2020/080578 CN2020080578W WO2021134929A1 WO 2021134929 A1 WO2021134929 A1 WO 2021134929A1 CN 2020080578 W CN2020080578 W CN 2020080578W WO 2021134929 A1 WO2021134929 A1 WO 2021134929A1
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WIPO (PCT)
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apparent
borehole
polarizability
resistivity
data
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PCT/CN2020/080578
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English (en)
Chinese (zh)
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刘伟韬
孟祥喜
杜衍辉
秦月云
于师建
刘玉本
申建军
宋增谋
高传朋
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山东科技大学
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Publication of WO2021134929A1 publication Critical patent/WO2021134929A1/fr

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/26—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with magnetic or electric fields produced or modified either by the surrounding earth formation or by the detecting device
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
    • G01V3/20—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
    • G01V3/38—Processing data, e.g. for analysis, for interpretation, for correction

Definitions

  • the invention belongs to the technical field of mine safety monitoring, and specifically relates to a structure activation dual-parameter monitoring system and method suitable for the tunneling process of coal mines, and in particular relates to whether structures such as adjacent faults or joints are activated during tunneling and working face mining. Real-time detection and prediction technology.
  • Geological structures such as faults, collapsed columns, and high-angle fissure zones are easily activated by mining and excavation deflection, which can induce geological disasters such as permeation. Therefore, real-time monitoring of the activation of these geological structures during the mining process, and mastering of their damage mechanism and activation law have important economic and practical significance for predicting and preventing the occurrence of geological disasters.
  • the purpose of the present invention is to provide a structure activation dual-parameter monitoring system and monitoring method.
  • the monitoring system can monitor the activation degree of structures such as interrupted layers and collapsed columns in the process of roadway excavation and working face stoping in real time, and monitor the dual-parameter monitoring system according to the structure activation Obtained dual-parameter data of apparent resistivity and apparent polarizability, comprehensively judge the degree of structural activation, and provide technical support for mine roadway excavation and working face mining.
  • One of the tasks of the present invention is to provide a structured activation dual parameter monitoring system, which adopts the following technical solutions:
  • a structure activation dual-parameter monitoring system which includes a preliminary geological detection system, a borehole detection system, a data collection system, a data conversion system, a data analysis system, a data storage device and a host system,
  • the borehole detection system includes a borehole detection device and related circuits.
  • the borehole detection device includes two parts: a fixed detection device and a mobile detection device.
  • the fixed detection device includes a guide probe, a measuring electrode, and a power supply electrode.
  • the measurement electrode is connected with a signal transmission device, and the electric field change signal received by the measurement electrode is transmitted through the signal transmission device; the movement detection device is measured along the borehole after the installation of the fixed detection device is completed. Point, accurate signal detection with a step distance of 2-4 meters;
  • the data collection system is connected to the measurement electrode, and the data collection system is mainly used to collect the electric field change signal received through the measuring electrode, and perform screening and screening, and then collect and store the interfering electric field signal after eliminating the interference electric field signal;
  • the data conversion system is used to convert the electric field change signal stored by the data collection system into a digital signal through the A/D in the host, so as to calculate the apparent resistivity and apparent polarizability of the detection structure.
  • the form is stored in the said data storage device;
  • the data analysis system is used to draw the apparent resistivity-time curve and the apparent polarizability-time curve through the display screen of the host system or export the digital signal source to draw the apparent resistivity-time curve and the apparent polarizability-time curve through the digital signal converted by the data conversion system.
  • the changes in resistivity and polarizability can be monitored and forecasted in real time on the activation state of the structure.
  • the above-mentioned related lines include a signal transmission line and a power supply cable.
  • the above-mentioned data collection system is connected to the above-mentioned measuring electrode through the above-mentioned signal transmission line.
  • the above-mentioned guide probe, The measuring electrode and the power supply electrode are fixed together on the distance measuring push rod, and the distance measuring push rod described above pushes them to a fixed position in the borehole.
  • the above-mentioned fixed detection device is arranged at the front end of the borehole 10-15 meters away from the construction area, and the borehole is sealed by grouting after the arrangement.
  • the above-mentioned bore diameter is larger than the diameter of the measuring electrode, and the ratio of the bore diameter to the diameter of the measuring electrode should be 1.4-1.6:1.
  • Another task of the present invention is to provide a structure activation dual-parameter monitoring method, which adopts the above-mentioned structure activation dual-parameter monitoring system, and the monitoring method sequentially includes the following steps:
  • the fixed detection device is installed at a distance from the geology Construct a 15-20m front end of the borehole, connect it to the data collection system placed in the trough through a signal transmission line, connect the signal transmission line and power supply line to the data collection system through trenching and shallow burying, and fix the measuring electrode in the detection device
  • the power supply electrode and the transmission line are all fixed on the distance measuring push rod. Through the distance measuring push rod, they are accurately placed in the borehole and sealed by grouting. They are sealed in the front end of the borehole as a long-term detection, and the rest of the borehole layout is the same as this hole. the same;
  • the monitoring system use the power supply electrode to supply power to the earth, measure the electric field change signal through the arranged fixed detection device, the measured electric field change signal will enter the data collection system through the signal transmission line, and the data collection system will perform according to the collected signals Screening and filtering, collecting and storing data after eliminating interference;
  • the digital signal mainly includes the apparent resistivity and apparent polarizability parameters in the detection structure
  • step g Determining the structural abnormal area: according to the apparent resistivity and apparent polarizability contour map of the borehole, combined with the structural activation judgment standard in step g, delimit the structural abnormal area and the stable area;
  • Determination of structural activation zone comprehensively analyze the apparent resistivity and apparent polarizability contour maps of the borehole to delimit the structural activation zone.
  • the collection system can adjust the data collection frequency according to actual needs. Generally, it can be collected once a day. When the structure is unstable, it can be collected every half hour to every hour. The number and frequency of collection can be based on the structure. The degree of activation and work need to be set flexibly.
  • step g The above-mentioned structural activation judgment standards in step g are:
  • the geological structure may contain water and may be in an activated state. At this time, the main precautions should be taken, or corresponding measures should be taken based on the on-site work situation;
  • the geological structure may contain water and may be in an activated state. At this time, the main precautions should be taken, or corresponding measures should be taken in conjunction with the on-site work situation;
  • Figure 1 is a schematic diagram of the system workflow
  • Figure 2 is a schematic diagram of the working principle of the system
  • Figure 3 is a schematic diagram of the principle structure of the drilling detection system
  • Figure 4 is a schematic diagram of the drilling layout of the working face
  • Figure 5 shows the line graphs of apparent resistivity-time and apparent polarizability-time of borehole 1, borehole 2, borehole 3, borehole 4, borehole 5, and borehole 6, respectively;
  • Figure 6 is a geological plan of polarizability data
  • Figure 7 is a geological plan of resistivity data
  • Figure 8 is a plan view of the structural activation zone determination.
  • the present invention proposes a structured activation dual-parameter monitoring system and monitoring method.
  • the present invention will be further described below in conjunction with specific embodiments.
  • Figure 1 is a schematic diagram of the system's working flow
  • Figure 2 is a schematic diagram of the system's working principle
  • Figure 3 is a schematic diagram of the principle structure of the borehole detection system.
  • Detected faults, collapsed columns, joints and other geological structures are monitored and forecasted in real time under conditions affected by mining.
  • Exploration boreholes are set up around the geological structure, and measurement electrodes are installed by using a fixed probe at the front end of the borehole.
  • the measuring electrode is connected to the data collection system and the on-site analysis host through a signal transmission device.
  • the invention constructs and activates a dual-parameter monitoring system, which includes a preliminary geological detection system, a borehole detection system, a data collection system, a data conversion system, a data analysis system, a data storage device and a host system.
  • the above-mentioned early geological detection system mainly refers to the use of high-density electrical method, transient electromagnetic method and other detection technologies to accurately detect the geological structure around the mining roadway and working face through detection equipment, and record the detected faults, collapse columns and other structural areas And marks, provide a basis for drilling detection.
  • the above-mentioned borehole detection system includes a borehole detection device, a signal transmission line, a power supply cable, and a ranging push rod.
  • the borehole detection device includes two parts: a fixed detection device and a mobile detection device.
  • the fixed detection device and the mobile detection device have the same structure.
  • the detection device includes a guide probe, a measuring electrode and a power supply electrode. When a fixed detection device is required, the guide probe, measuring electrode and power supply electrode are fixed together on the ranging push rod and pushed into the borehole by the ranging push rod. Fixed position.
  • the measurement electrode is connected with a signal transmission device, which transmits the electric field change signal received by the measurement electrode through the signal transmission device; the mobile detection device measures points along the borehole after the installation of the fixed detection device, with a step distance of 2-4 meters for accuracy Signal detection.
  • the above-mentioned mobile detection device is composed of measuring electrodes and power supply electrodes arranged in a borehole, and is used for detecting mobile measuring points. According to the depth of the borehole, the distance between the measuring points is 2-4 meters for detection.
  • the above-mentioned fixed detection device is arranged at the front end of the borehole 10-15 meters away from the structure area, and the borehole is sealed by grouting after it is arranged.
  • the above-mentioned hole diameter is larger than the diameter of the measuring electrode, and the ratio of the hole diameter to the diameter of the measuring electrode should be 1.4-1.6:1.
  • the power supply electrode of the present invention is provided with two groups, one is located behind the tunnel excavation or the working face advancement, and the other is located in the construction borehole, thereby forming a closed loop.
  • the drilling of the tunnel excavation or the working face advancement is used for structural activation water exploration detection.
  • Construct a dual-parameter monitoring method for activation, the specific monitoring and judgment methods include:
  • step a carry out on-site drilling operations.
  • the specific steps include: when roadway excavation and working face mining advance to the adjacent geological structure 15-20 meters, the excavation roadway and goaf area are separated in the direction of advancement. Select 3-5 borehole observation points, and drill holes with a certain inclination into the roadway or the roof, floor and coal wall of the goaf. The depth of the hole depends on the location and scope of the geological structure. The general hole depth is 40- Ranging from 80m;
  • the drilling detection system After the drilling operation is ready, install the drilling detection system.
  • the specific steps include: cleaning the construction drilling to prevent the debris in the hole from affecting the detection system.
  • select the number of monitoring points of the mobile detection device According to the drilling depth, select the number of monitoring points of the mobile detection device and Fixed detection device installation location.
  • the fixed detection device is installed at the front end of the borehole 15-20 meters away from the geological structure. It is connected to the data collection system placed in the trough through the signal transmission line.
  • the signal transmission line and the power supply line are shallowly buried by trenching
  • the measuring electrode, power supply electrode and transmission line in the fixed detection device are all fixed on the ranging push rod, which is accurately placed in the borehole through the ranging push rod, and sealed with grouting as a long-term detection and storage
  • the other drilling arrangements are the same as this hole;
  • the specific steps include: use the power supply electrode to supply power to the earth, measure the electric field change signal through the arranged fixed detection device, and the measured electric field change signal will enter the data collection system through the signal transmission line.
  • the collection system will screen and filter according to the collected signals, and collect and store the interference data after eliminating the interference.
  • the collection system can adjust the data collection frequency according to actual needs. Generally, it can be collected once a day, and it can be carried out every half an hour when the structure is unstable. To collect once every hour, the number and frequency of collection can be flexibly set according to the activation degree of the structure and work needs;
  • Data collection the specific steps include: pre-processing and A/D conversion of the electric field signals collected and stored by the data collection system into digital signals, and at the same time outputting the digital signals to the data analysis system and storing them in the data storage device.
  • the system is effective Establish a mine structure monitoring database and use big data for analysis and research.
  • the digital signal mainly contains the apparent resistivity and apparent polarizability parameters in the detection structure;
  • the geological structure may contain water and may be in an activated state. At this time, the main precautions should be taken, or corresponding measures should be taken in conjunction with the on-site work situation;
  • the geological structure may contain water and may be in an activated state. At this time, the main precautions should be taken, or corresponding measures should be taken in conjunction with the on-site work situation;
  • step g Determining the structural abnormal area: According to the apparent resistivity and apparent polarizability contour map of the borehole, combined with the structural activation judgment standard in step g, delimit the structural abnormal area and the stable area;
  • Determination of structural activation zone comprehensively analyze the apparent resistivity and apparent polarizability contour maps of the borehole to delimit the structural activation zone.
  • the mobile detection device can still be used as an independent detection device to divide the borehole into a number of detection points according to the depth.
  • the step distance of the detection points is 2-4 meters, and then follow steps d, e, f can establish the apparent resistivity-time curve and the apparent polarizability-distance curve, so that it can be obtained whether there is geological structure activation in the detection range of a cylindrical space with a radius of 20-30 meters centered on the borehole axis.
  • Step 1 Perform fine detection of adjacent areas at different distances from the working face along the trench to detect the specific geological structure distribution and specific location and range near the working face. It can be found that there are two faulted geological structures on the floor of the working face. Depending on the aquifer, the upper part of the fault has strong water richness;
  • Step 2 According to the distribution of the fault structure, carry out the drilling detection and layout, respectively arrange 2 drilling holes on the left fault, and 4 drilling holes on the larger fault on the right, as shown in Figure 4, respectively with dip angles Drill 45° to the vicinity of the fault.
  • the depth of the borehole is 10-20 meters from the edge of the fault.
  • the fixed detection device is installed at the front end of the borehole 15-20 meters away from the geological structure.
  • the measuring electrode and the power supply electrode and the transmission line in the fixed detection device are fixed on the distance measuring push rod. Through the distance measuring push rod, they are accurately placed in the borehole and are grouted and sealed.
  • the other drilling arrangements are the same as this hole;
  • Step 3 Turn on the power supply, measure the electric field change signal through the fixed detection device arranged in the borehole, and transmit the electric field change signal to the data collection system through the signal transmission line.
  • the data collection system is carried out every half a day when the roadway is tunneling. Data collection, when the working face is mining, it will be changed to a data collection every 20-30 minutes;
  • Step 4 The electric field change signal collected and stored by the data collection system is pre-processed and A/D converted into a digital signal.
  • the digital signal mainly contains the dual parameters of apparent resistivity and apparent polarizability in the geological structure.
  • Step 5 Collect the dual parameters of apparent resistivity and apparent polarizability after being processed by the constructed and activated dual-parameter monitoring system;
  • Step 6 Analyze and process the changes in the dual-parameter digital signal of the apparent resistivity and apparent susceptibility after the system has collected and converted, and construct a diagram of the relationship between apparent resistivity, apparent susceptibility and time, as shown in Figure 5 .
  • Step 7 According to the structural activation criterion, it can be known that the structures near borehole 5 and borehole 6 are in an activated state, the structures near borehole 1 and borehole 2 are in a stable state, and borehole 3 and borehole 4 are in an abnormal state. More in-depth analysis should be carried out in conjunction with other measures;
  • Step 8 Use surf software to draw contour lines of apparent resistivity and apparent susceptibility data of different boreholes at the same time to delimit the range of structural anomalies and stable regions, as shown in Figures 6 and 7;
  • Step 9 Comprehensively analyze the apparent resistivity and apparent polarizability contour maps of the borehole, and delimit the structural activation zone, as shown in Figure 8.

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  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
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  • General Physics & Mathematics (AREA)
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Abstract

L'invention concerne un système de surveillance et un procédé de surveillance d'activation de structure à deux paramètres, se rapportant au domaine technique de la surveillance de la sécurité d'une mine. Le système comprend un système de détection de trou de forage, un système de collecte de données, un système de conversion de données, un système d'analyse de données et un dispositif de stockage de données. Le système de détection de trou de forage comprend un dispositif de détection de trou de forage. Le système de collecte de données est utilisé pour collecter un signal de changement de champ électrique reçu par une électrode de mesure, et effectuer une discrimination et un criblage. Le système de conversion de données est utilisé pour convertir le signal de changement de champ électrique en un signal numérique au moyen du convertisseur A/N dans un hôte, le signal numérique étant stocké sous la forme d'un calcul de deux paramètres, c'est-à-dire la résistivité apparente et la polarisabilité apparente, dans une structure détectée. Le système d'analyse de données est utilisé pour tracer une courbe de résistivité apparente en fonction du temps et une courbe de polarisabilité apparente en fonction du temps pour le signal numérique au moyen de l'écran d'affichage d'un système hôte ou l'exporter à partir d'une source de signal numérique, et en analysant des changements de la résistivité et de la polarisabilité, surveiller et prévoir un état d'activation de structure en temps utile. Une assistance technique peut être fournie pour l'excavation de tunnels de mine et le travail d'abattage de face de travail.
PCT/CN2020/080578 2019-12-31 2020-03-23 Système de surveillance et procédé de surveillance d'activation de structure à deux paramètres WO2021134929A1 (fr)

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CN201911402106.3A CN111077583B (zh) 2019-12-31 2019-12-31 构造活化双参数监测系统及监测方法
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CN114415245A (zh) * 2022-01-21 2022-04-29 山东省地质矿产勘查开发局第六地质大队(山东省第六地质矿产勘查院) 一种适用于中深部蚀变岩型金矿找矿方法
CN117607973B (zh) * 2024-01-23 2024-04-12 山东科技大学 一种可判别陷落柱时空动态活化程度的方法

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