Classifications

• • E—FIXED CONSTRUCTIONS
  • E21—EARTH OR ROCK DRILLING; MINING
  • E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
  • E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
  • E21F17/18—Special adaptations of signalling or alarm devices
  • E21F17/185—Rock-pressure control devices with or without alarm devices; Alarm devices in case of roof subsidence
• • 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

Definitions

• the invention relates to a method for examining movement processes taking place in solid media, in particular for examining in the vicinity of.
• the invention further relates to a device for the investigation (perception, control) of movement processes taking place in solid media in situ.
• the constantly increasing energy demand makes it increasingly necessary to develop energy sources and raw material sources in mining, the geological conditions of which differ more or less from the usual ones.
• quarry construction is carried out on a broad front, in which the hanging rock immediately above the mineral to be mined is brought to a spontaneous or provoked demolition.
• measuring sites defined according to a specific network are provided with measuring devices - for example with state signal transmitters designed for the risk of an expected gas outbreak or with devices serving for measuring and / or signaling states related to mechanical strength. With these measuring devices, one or more state characteristics of the geological system are measured. Through repeated or continuous measurements, the tendency to change the
• the mining activity is then modified if necessary by means of the forecast based on this.
• the method generally includes observing the conditions of a geological system from certain points of view or influencing the changes in state on this basis. She gives ; However, no concrete solution for the in situ investigation of the partial movement processes taking place inside the rock.
• the aim of the invention was to eliminate the danger and, on the other hand, the uncertainty of the possible conventional investigation and to create a method or a device with which information can be obtained in situ about the movement processes taking place inside the solid rock. This information and also its chronological course enable the inner Track movement changes safely and objectively or take the necessary measures based on the observations.
• the movement processes taking place in the interior of the rock can be perceived, observed and registered by means of electrical sensors arranged appropriately in the solid medium.
• signals can be formed which discontinuously or continuously signal information about the movement processes, their location, size and, if necessary, their acceleration with the desired accuracy. These can then be registered, evaluated and processed under suitable and secure conditions.
• the invention accordingly relates to a method for examining movement processes occurring in solid media in situ, in which 'electrical sensors and / or — if desired outside the medium — signal transmitters are attached and fastened in the solid medium.
• signals corresponding to the location and / or the extent and / or the acceleration of the movement process are formed, these signals are transmitted via lines and / or wirelessly and then received, registered and / or processed.
• signals corresponding to the respective value of the - possibly resulting - impedance of the sensors are formed and the signals are modulated with them.
• the signals are formed in the frequency and / or time division multiplex system and / or with different modulation.
• the invention further relates to a device for the investigation of movement processes taking place in solid media in situ, which supply electrical energy having. It is characteristic of the device that it has sensors arranged and fixed at the examination point (s) of the medium, signal transmitters assembled or connected to the sensors, a signal receiver connected to the signal transmitters via lines or wirelessly, and, if desired, a registration and / or data processing unit.
• the sensors are preferably arranged in bores which are formed in the solid medium. It is further preferred if the sensors are also designed as acceleration sensors.
• the sensors are arranged in the form of a spatial so-called resistance network in which elements of the same impedance are connected in parallel.
• the sensors are designed as resistors deforming due to the movement of the medium or as a continuously divided capacitance which becomes shorter as a result of the movement of the medium.
• a further advantageous embodiment of the device contains electromagnetic signal transmitters and signal receivers, which are preferably designed as radio transmitters and receivers.
• Auoh is regarding the spatial sequence of the rock movements. it is advantageous to use several signal generators at the same time. In this case, the modulation of the signal transmitters is different and they are designed in the frequency and / or time division multiplex system.
• Fig. 1 shows an application of the invention in a deep mine where the observation of rock movements from one in the area of the mine located from or over the day takes place by means of an impedance network, which is arranged in a borehole, while in Fig.
• a bore 2 is provided in the area of the solid medium 1 to be examined, in which a impedance network 8 is attached, which is connected to the signal generator 5 via a line.
• the sensors 4 of the impedance network 8 are arranged at a corresponding distance from each other, parallel-connected elements of the same impedance.
• the signal transmitter 5 is expediently a radio transmitter which has its own current source and whose emitted signal modulation is controlled by the value of the resulting impedance of the impedance network 8.
• the signal generator 5 is connected via lines and / or wirelessly to the signal receiver 6 set up at a securely accessible location - possibly even for days -, expediently a radio receiver and also to the registration unit 7, which can be completed by a data processing unit not shown in the drawing .
• the part of the impedance network 8 concerned is torn off at the subsection 3 where the movement takes place. Because of the torn-off impedance elements, the resulting impedance perceived by the signal generator 5 changes and, accordingly, the modulation of the signal emitted. Since the point at which the bore 2, in which the examination points 3 and the impedance network 8 are located, is known, a change can be made from the signal and from its value be clear about the happening of the movement as well as the location of the rock area concerned. If the sensors 4 are also designed as acceleration sensors, the information mentioned is supplemented by data about the acceleration of the movement process.
• the bore 2 is designed to lead upwards from the excavation in order to examine a corresponding section of the hanging rock.
• the signal transmitters 5 assembled with the sensors 4 are arranged and fastened in the bore 2 at the examination sites 3.
• the signal transmitters 5 are expediently radio transmitters.
• the signal transmitters 5 are in wireless connection with a corresponding antenna 10.
• the antenna 10 is expediently arranged in a further bore drilled from the bore 2 at a distance of a few meters. At its lower end, the antenna 10 is connected to a metallic conductor 11 laid on the sole, via which the signals (if necessary also by wireless) are routed to the signal receiver 6. With an appropriate arrangement, the antenna can also be set up outside a borehole.
• the signal transmitters 5 are radio transmitter devices which emit signals of different frequencies and change the parameters of the emitted signal as a function of the rock movements.
• the signal transmitters 5 have independent current sources.
• the main advantages of the invention can be summarized as follows. a) A device can be placed in the solid rock, at the point to be observed, depending on the respective movement processes taking place inside the rock, its location and its extent - if necessary also from their acceleration - delivers objective signals in situ. These signals can be observed, registered and processed at a suitable location, in the desired frequency and under safe conditions. b) When used in the mine, the spatial and temporal course of the burglary and marking can be determined. Based on this, the later changes to be expected can be forecast.

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• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Mining & Mineral Resources (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Geology (AREA)
• Environmental & Geological Engineering (AREA)
• Acoustics & Sound (AREA)
• Geochemistry & Mineralogy (AREA)
• Remote Sensing (AREA)
• General Physics & Mathematics (AREA)
• Geophysics (AREA)
• Geophysics And Detection Of Objects (AREA)
• Preliminary Treatment Of Fibers (AREA)
• Testing Or Calibration Of Command Recording Devices (AREA)
• Length Measuring Devices With Unspecified Measuring Means (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 1985
  • 1985-01-30 HU HU34185A patent/HU206161B/hu not_active IP Right Cessation
• 1986
  • 1986-01-30 DE DE19863690039 patent/DE3690039D2/de not_active Expired
  • 1986-01-30 WO PCT/HU1986/000008 patent/WO1986004672A1/de not_active Ceased
  • 1986-01-30 DE DE19863690039 patent/DE3690039C1/de not_active Expired
  • 1986-01-30 EP EP19860901118 patent/EP0211061A1/de not_active Withdrawn
  • 1986-01-30 JP JP61500961A patent/JPS62501583A/ja active Pending
  • 1986-01-30 GB GB08622804A patent/GB2183845B/en not_active Expired

Non-Patent Citations (1)

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