WO1998008113A1 - Procede et dispositif servant a controler les vibrations du sol et les deflagrations aeriennes - Google Patents

Procede et dispositif servant a controler les vibrations du sol et les deflagrations aeriennes Download PDF

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Publication number
WO1998008113A1
WO1998008113A1 PCT/AU1997/000538 AU9700538W WO9808113A1 WO 1998008113 A1 WO1998008113 A1 WO 1998008113A1 AU 9700538 W AU9700538 W AU 9700538W WO 9808113 A1 WO9808113 A1 WO 9808113A1
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WO
WIPO (PCT)
Prior art keywords
blast
monitors
air
ground vibration
monitor
Prior art date
Application number
PCT/AU1997/000538
Other languages
English (en)
Inventor
Allan Coyne
Original Assignee
Allan Coyne
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Allan Coyne filed Critical Allan Coyne
Priority to AU38416/97A priority Critical patent/AU3841697A/en
Publication of WO1998008113A1 publication Critical patent/WO1998008113A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
    • G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
    • G01V1/16—Receiving elements for seismic signals; Arrangements or adaptations of receiving elements
    • G01V1/20—Arrangements of receiving elements, e.g. geophone pattern

Definitions

  • the present invention relates, in general terms, to an improved method and apparatus for use in the monitoring of ground vibrations, air-blast and/or the like. More particularly, but not exclusively, the present invention relates to an improved method, and associated apparatus, for detecting, monitoring and perhaps ultimately minimising the effects of blasting and the like procedures, of the type often employed in mining operations, ground clearing operations, pre-construction clearing of land sites, etc. It should be realised, however, that the method and apparatus in accordance with the present invention may also be utilised where ground vibration is produced by operations where blasting, as by means of explosives, does not occur, for example in pile driving operations, where compacting machinery is being used etc.. These operations do not normally produce air-blast, but can produce significant levels of ground vibration. Often, conditions are imposed by regulatory authorities with respect to these operations. These conditions usually take forms that require:
  • explosives of any known type enjoy frequent usage in such operations, by virtue of such explosives being by far the most efficient and effective way of gaining access to the relevant material being mined, quarried or the like.
  • the effects of blasting, in operations such as open-cut mining, quarrying etc. are and can be many and various, dependent upon the site of the overall operation.
  • the overall impact of such blasting on the environment in general, not to mention the creatures of all types, animal as well as human, occupying that environment, as well as on any and all structures within that environment, can neither be underestimated nor neglected. This is most especially the case in situations wherein the relevant mining or like operation, including blasting, is taking place in close proximity to inhabited areas.
  • the air- blast and/or ground vibration epicentre (2) the point from which the air-blast and/or ground vibration event emanates will be referred to hereinafter as "the air- blast and/or ground vibration epicentre";
  • the monitored site the area over which the air-blast and/or ground vibration event monitors are stationed.
  • one or more monitors can be set up more or less permanently at specific monitoring sites around or in the vicinity of the mine, quarry or the like, with the threshold levels of such monitors being set sufficiently low to ensure that all air-blast and/or ground vibration events are captured. Locating such monitors permanently at given sites, whilst removing the need for them to be separately set prior to any air-blast and/or ground vibration event, nonetheless gives rise to its own problems. Field trips by appropriate personnel are still required to collect the results from the various monitoring equipment. Furthermore, in the instance of there being any failure in any of the equipment, in the worst possible scenario such failure can perhaps go undetected for long periods of time.
  • the present invention seeks to improve over the known techniques and apparatus by providing a method and apparatus for continuously and accurately monitoring air-blast and/or ground vibration events.
  • a method for monitoring and recordal of air-blast and/or ground vibration from an operation which produces these effects, said method including the steps of: locating or disposing a plurality of monitors for air-blast and/or ground vibration in predetermined positions over a given area, at least one of said monitors being located in closer proximity to said operation than the remainder of said monitors; setting the operating mode of said at least one monitor relatively high, when compared with the remainder of said monitors, such that said at least one monitor is triggered or activated only by significant air- blast and/or ground vibration; all said monitors being in communication with one another such that, when said at least one monitor is activated, said at least one monitor also triggers the remaining monitors.
  • a method for monitoring and recordal of air-blast and/or ground vibration phenomena from an operation which produces these effects including the steps of: locating or disposing a plurality of monitors for air-blast and/or ground vibration in predetermined positions over a given area, at least one of said monitors being located in closer proximity to the air-blast and/or ground vibration epicentre than the others; setting the trigger level or operating mod of said at least one monitor to such a high level that, by virtue of its close proximity to the air- blast and/or ground vibration epicentre, these thresholds will only be exceeded by an air-blast and/or ground vibration event; all said monitors being in communication with one another such that, when said at least one monitor is activated, said at least one monitor generates a control signal which is transmitted to the remainder of said monitors.
  • a method for monitoring and recordal of air-blast and/or ground vibration phenomena which result from various operations such as blasting, pile-driving, use of compacting machinery and the like, said method including the steps of: locating or disposing a plurality of air-blast and/or ground vibration event monitors in predetermined positions over a given area, at least one of said monitors being located in closer proximity to the air-blast and/or ground vibration epicentre than the remainder of said monitors; setting the operating mode of said at least one monitor such that when air-blast and/or ground vibration levels exceed the respective preset thresholds of said at least one monitor, said at least one monitor issues a trigger signal- setting the respective air-blast and/or vibration thresholds of said at least one monitor to such a high level that, by virtue of its close proximity to the air-blast and/or ground vibration epicentre, these thresholds will only be exceeded by an air-blast and/or ground vibration event; setting an additional operating mode of said at least one monitor such that, on receipt
  • apparatus for the monitoring and recordal of air-blast and/or ground vibration events said apparatus being made up of a plurality of monitors for air-blast and/or ground vibration effects, adapted to be disposed in a predetermined manner or pattern around and in the vicinity of an air-blast and/or ground vibration event, said monitors being in communication with one another and with a suitable processing unit (of any given type), and wherein at least one of said monitors, disposed in close proximity to said air-blast and/or ground vibration epicentre, acts as a trigger for the remaining monitors, said at least one monitor, in the event of an air-blast and/or ground vibration event, also serving to generate a control signal for the remainder of said monitors.
  • FIG 1 shows, not to scale but in schematic form, a proposed lay-out for use in practising the method of the present invention.
  • FIG 2 illustrates, in schematic form and in side elevation, a monitoring unit for use with the present methods.
  • Fig 1 there is set out thereon a proposed lay-out employing the method and apparatus in accordance with the present invention.
  • a plurality of monitors preferably of the type illustrated in Fig 2 of the drawings, are disposed in a pre-determined manner.
  • the monitors involved can be made up of two types dependent upon their actual location.
  • a first type, generally designated 1 is adapted to be located in reasonably close proximity to the air-blast and/or ground vibration epicentre.
  • a second type is adapted to be located at positions more remote from the air-blast and/or ground vibration epicentre and are intended to give constructive data concerning the air-blast and/or ground vibration event at such sites which are more remote from the air-blast and/or ground vibration epicentre.
  • the first type of monitor 1 will hereinafter be referred to as an early warning unit.
  • the second type of monitor 2 will be referred to hereinafter as a slave unit.
  • the various monitors 1 ,2 are in communication with one another using any known technology, such as for example radio-based telemetry, electronic means etc.
  • the or each monitor 1 ,2 is similarly linked to an appropriate recording means of any given type, as for example a personal computer, also disposed at a position remote from the air-blast and/or ground vibration epicentre.
  • the or each early warning unit being disposed relatively close to the air-blast and/or ground vibration epicentre, can have the air-blast and/or vibration threshold levels thereof adjusted to or set at a relatively high level, thereby eliminating the possibility of false triggering through the medium of localised high winds, passage of heavy traffic, etc.
  • the or each early warning unit 1 is preferably so disposed and set as to only be triggered for purposes of recording the air-blast and/or ground vibration event by the air-blast and/or ground vibration event itself.
  • Fig 2 thereon there is illustrated a preferred form of monitoring unit, suitable for use as either a slave unit or an early warning unit.
  • Such monitoring unit is preferably solar powered (to avoid the possibility of failure through lack of power) .
  • the unit preferably includes a transceiver of any known type - as for example a high speed data radio - for the transmission of signals to and from a central processing unit and/or to and from other monitors as desired.
  • the typical monitoring unit is adapted to be located at a given site in any known manner.
  • a monitoring unit includes, as its principal components, a mast 30, a microphone 31 for the detection of air-blast, a geophone 32 for the detection of ground vibration, a data logging unit 33 of the type available under the trade mark DYNAMATE, high speed data radio transmission means 34, an antenna 35 to facilitate reception and transmission of signals, and suitable cabling 36 for electrically/electronically interconnecting the various components.
  • a solar panel or the like means 37 may be included.
  • the principle of operation of the method in accordance with the present invention is that, within milliseconds of any early warning unit 1 detecting excedence of either of its air-blast and/or ground vibration thresholds by an air-blast and/or ground vibration event, such unit 1 directs a triggering signal - via radio telemetry or other electronic means - to all other units, both early warning and slave units 1 ,2, which can then begin to record the air-blast and/or ground vibration event.
  • all monitoring units 1 ,2 can be triggered so as to be in monitoring mode long prior to the arrival at the site of such units of the air-blast and/or ground vibration data.
  • the information regarding the air-blast and/or ground vibration event is received by a Central Recording Unit, which automatically displays results on a geographic map of the monitored site, and surrounds, within a finite time of the air-blast and/or ground vibration event, thus providing immediate feedback of air-blast and/or ground vibration event measurements.
  • a Central Recording Unit which automatically displays results on a geographic map of the monitored site, and surrounds, within a finite time of the air-blast and/or ground vibration event, thus providing immediate feedback of air-blast and/or ground vibration event measurements.
  • the Central Recording Unit in communication with the radio telemetry network automatically collects the air- blast and/or ground vibration event data from each monitor, early warning type 1 and slave type 2, displaying the peak air-blast and/or ground vibration event results on the aforementioned screen map and adding those results to an existing database.
  • Appropriate software can be employed to allow for analysis of the results thus recorded.
  • data representing the variation of the air-blast and/or ground vibration event with respect to time is also retrieved from each monitor, early warning type 1 and/or slave type 2. This data used to produce time scaled graphical waveforms of the air- blast and/or ground vibration event recorded by each monitor.
  • the Central Recording Unit also continually interrogates and records the status of each monitor, early warning type 1 and slave type 2, and reports any condition of any monitor which could cause it to be incapable of performing its designated function. This feature enables personnel to take appropriate action to correct the condition as soon as it occurs.
  • the thresholds or other settings of the or each monitor unit can be controlled/adjusted by, and from, the Central Recording Unit, through the medium of an appropriate remote signal, thus eliminating the need to have personnel in regular attendance at each monitor site.
  • the operation of any monitor as either an early warning unit or a slave unit can be varied dependent upon the location of the air-blast and/or ground vibration epicentre relative to that monitor.
  • each monitor unit has the capability of also acting as a relay, whereby to assist in transmission of comments, early warning unit trigger signals and/or data between the various monitor units - both early warning and slave type.
  • the communication network, and monitoring system in general, may also be used for the capture, transmission and analysis of other types of data which can be collected, as for example: dust levels at any given site at any time, both before and subsequent to an air-blast and/or ground vibration event; noise level measurement; wind speed and direction; temperature; numidity; and water quality. In fact any number of different environmental parameters can be monitored, recorded and then analysed.
  • the early warning type units are intended to serve a variety of purposes, and principally to activate the monitoring units so as to allow for recordal of relevant information. To do this, or achieve this result, the sensitivity of such early warning units is (are) appropriately adjusted by means of their threshold levels.
  • the principle of operation of the method and apparatus in accordance with the present invention is that, upon detecting an air-blast and/or ground vibration event the early warning unit issues a "go" signal to all slave or monitor units, in fact to all other monitoring units re the circuit or system, thereby initiating recordal procedures.
  • the air-blast and/or ground vibration data retained by all units would be that collected during , say, the previous 60 seconds of time.
  • all units Upon receipt of a "go" signal, all units continue to collect air-blast and/or ground vibration data until the expiration of their predetermined logging periods.
  • the operator located at a site remote from the air-blast and/or ground vibration epicentre, will himself detect that an air-blast and/or ground vibration event has occurred, by sensing the ground vibration and/or air-blast resulting therefrom. Alternatively, the operator can be informed by another observer that an air-blast and/or ground vibration event has occurred.
  • a prearranged countdown communicated by means of a two-way radio from the shotfirer to the operator.
  • the operator can then intervene to manually transmit, to a selected early warning unit, a command to force it to issue a "go" signal.
  • the result of this action is that all other units respond as if the "go" signal was the result of the air-blast and/or ground vibration event exceeding either of the respective thresholds of an early warning unit. Since the Central Recording Unit automatically collects all data retained by the monitors, the forced "go" signal ensures that the data pertaining to the air-blast and/or ground vibration event is captured.
  • the early warning facility made available by the method and apparatus in accordance with the present invention should not be limited to detecting whether ground vibration or air-blast thresholds are exceeded.

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  • Physics & Mathematics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Environmental & Geological Engineering (AREA)
  • Geology (AREA)
  • Remote Sensing (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

Procédé amélioré servant à contrôler et à enregistrer soit les vibrations du sol, soit les déflagrations aériennes provenant d'une opération produisant ces effets, ce qui consiste à disposer une pluralité de moniteurs sensibles aux vibrations ou aux déflagrations à des positions prédéterminées sur une zone donnée, au moins un desdits moniteurs étant placé à proximité plus étroite de l'opération que le reste desdits moniteurs; à régler le mode de fonctionnement dudit moniteur relativement élevé par rapport au reste desdits moniteurs, de sorte que ledit moniteur n'est déclenché ou activé que par une vibration ou par une déflagration importantes; la totalité desdits moniteurs étant en communication les uns avec les autres, de telle façon que, quand au moins un moniteur est excité, ledit moniteur le plus proche génère un signal de commande qui déclenche également le reste des moniteurs. Dispositif servant à mettre en application ce procédé et comprenant une pluralité de moniteurs sensibles aux effets produits par des déflagrations ou des vibrations du sol et conçus pour être placés d'une manière ou selon une configuration prédéterminées, ainsi qu'à proximité d'un emplacement sur lequel vont se produire une déflagration ou des vibrations du sol, ces moniteurs étant en communication les uns avec les autres et avec une unité de traitement appropriée (de tout type donné), au moins un desdits moniteurs, situé à proximité étroite de l'épicentre de ladite déflagration ou desdites vibrations, servant de déclencheur pour le reste des moniteurs, ledit moniteur, un au moins, dans le cas d'une déflagration ou de vibrations du sol, servant également à générer un signal de commande vers le reste desdits moniteurs.
PCT/AU1997/000538 1996-08-21 1997-08-21 Procede et dispositif servant a controler les vibrations du sol et les deflagrations aeriennes WO1998008113A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU38416/97A AU3841697A (en) 1996-08-21 1997-08-21 Method and apparatus for monitoring ground vibration and air-blast

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPO1784 1996-08-21
AUPO1784A AUPO178496A0 (en) 1996-08-21 1996-08-21 Method and apparatus for monitoring ground vibration and air-blast

Publications (1)

Publication Number Publication Date
WO1998008113A1 true WO1998008113A1 (fr) 1998-02-26

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WO (1) WO1998008113A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113252114A (zh) * 2021-06-11 2021-08-13 中国煤炭科工集团太原研究院有限公司 隔爆型电气设备的内部环境状态监测方法及其装置
US11681062B2 (en) 2019-11-12 2023-06-20 Systemes De Controle Actif Soft Db Inc. System and a method for vibration monitoring

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110598312A (zh) * 2019-09-09 2019-12-20 武汉安保通科技有限公司 一种地下振动事件类型识别方法及系统

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5789673A (en) * 1972-08-21 1975-01-09 Texas Instruments Incorporated Seismic recording method using separate recording units for each group
US3886494A (en) * 1972-11-13 1975-05-27 Exxon Production Research Co System for gathering and recording seismic signals
FR2435730A1 (fr) * 1978-07-12 1980-04-04 Geostock Procede et dispositif de surveillance sismique des sols
EP0182452A1 (fr) * 1984-11-23 1986-05-28 Western Atlas International, Inc. Système à télémétrie RF

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5789673A (en) * 1972-08-21 1975-01-09 Texas Instruments Incorporated Seismic recording method using separate recording units for each group
US3886494A (en) * 1972-11-13 1975-05-27 Exxon Production Research Co System for gathering and recording seismic signals
FR2435730A1 (fr) * 1978-07-12 1980-04-04 Geostock Procede et dispositif de surveillance sismique des sols
EP0182452A1 (fr) * 1984-11-23 1986-05-28 Western Atlas International, Inc. Système à télémétrie RF

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11681062B2 (en) 2019-11-12 2023-06-20 Systemes De Controle Actif Soft Db Inc. System and a method for vibration monitoring
CN113252114A (zh) * 2021-06-11 2021-08-13 中国煤炭科工集团太原研究院有限公司 隔爆型电气设备的内部环境状态监测方法及其装置
CN113252114B (zh) * 2021-06-11 2023-09-29 中国煤炭科工集团太原研究院有限公司 隔爆型电气设备的内部环境状态监测方法及其装置

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Publication number Publication date
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