JP2913042B2 - Underground excavator propulsion management surveying device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a propulsion management surveying device for underground joining of an underground machine.

[Conventional technology] Conventionally, underground joining by two opposing underground excavators or underground joining by one underground excavator and a shaft, both construction lines match the planned line with high accuracy It is desired to do. Failure to do this correctly will result in losses such as increased overburden, increased drilling volume, and rumors of in-wall injection. In order to perform such underground joining with high accuracy and high efficiency, although not shown in the prior art, for example, underground propulsion management and surveying by transit, etc., optical oscillation to generate coherent light such as laser in the downhole An underground propulsion management survey or azimuth gyro that installs a device, irradiates a planning line from the device, reads the light spot on the target attached to the shield excavator, and determines the deviation and declination of the underground excavator Underground propulsion management surveying, in which a relative position from a reference position is determined by combining a pressure sinkometer, an inclinometer, and an odometer based on a segment length, is known. As a result, recently, even under long tunnels, the underground joint error is within about 100 mm.
In recent years, a surveying method for directly underground bonding with high accuracy has been used. This will be described with reference to FIGS. 2 and 3. This is, for example, as shown in FIG.
Two underground excavators 11 and 12 trying to join underground
When approaching at a distance of about 0 to 40 m, drill a pilot hole 20 from one of the underground excavators and from the reference point on the planning line to the other underground excavator by small-diameter boring. A reference point on a planning line in either mine
The underwater propulsion survey in which the laser beam 32 of the laser projector 31 provided in the P10 is irradiated through the pilot hole 20 to the light receiver 33 provided in the other well, and errors such as eccentricity and declination of both holes are visually recognized. The light receiver 33 is installed on a reference point P20 on the planning line on the installation side, and its light receiving surface has, for example, as shown in FIG. Several circles are drawn. If the planning lines of both mines are the same (that is, there is no relative eccentricity and relative declination, that is, if there is no relative error), the irradiation point P21 of the laser beam 32 coincides with the reference point P20. However, normally, as shown in the figure, the irradiation point P21 and the reference point P20 are usually different (that is, there is a relative error). Therefore, based on this result, one or both of the underground excavators 11 and 12 are appropriately steered and
We are trying to make accurate underground joints.

[Problems to be Solved by the Invention] However, the above-mentioned conventional techniques have the following disadvantages. There is an inconvenience that the accuracy of the underground connection cannot be known unless the tunnel penetrates. Furthermore, as mentioned above, there is still an error of about 100 mm or less when connecting underground today. Specifically, it is as follows.

Underground propulsion management surveying by transit or the like has the disadvantage that when a tunnel is bent and excavated, it is necessary to have many measurement points, and it is not possible to perform surveying in real time.

Underground propulsion management surveying using laser light may not be able to irradiate laser light to the target if the planning line is bent,
The optical oscillating device must be moved to an appropriate position.
In addition, since the laser beam cannot be directly radiated to the entire planning line,
After measuring the angle and distance between the target optical measurement device and the plan line, the deviation and angle of the shield excavator are calculated after calculating the plan line. Therefore, there is a drawback in that the transfer, measurement, and calculation of the optical oscillation device require labor and the efficiency of the excavation work is reduced.

Underground propulsion management surveying using a gyro has a problem of accumulated errors, is unsuitable for long-distance excavation, and similarly unsuitable for continuous curves with small curvatures.

Underground propulsion management surveying using a pilot hole and a laser beam is a direct surveying in comparison with the above, and high-precision underground joining can be expected. However,
There is a drawback in that the installation of the pilot hole, the laser projector and the light receiver requires human labor, which is far from the automation (or labor saving) expected recently.

The disadvantage common to the above is that these propulsion control surveys cannot be applied to underground excavation of a pit diameter that humans cannot enter.

The present invention focuses on the above-mentioned conventional problems, and can be applied to underground excavation of a small diameter that humans cannot enter, and an underground excavator suitable for automation (labor saving). An object of the present invention is to provide a propulsion management surveying device for underground connection.

[Means for Solving the Problems] In order to achieve the above object, the first of the underground joint propulsion management and surveying devices of the underground excavator according to the present invention will be described with reference to FIG. A magnetic field generator 42 is provided at the tip of a boring 41 drilled from the underground excavator 12, and a matrix is formed on the front surface of the other underground excavator 11 that has excavated in opposition to the one underground excavator 12. The magnetic field receiver 50 is provided. Further, although not shown, a boring 41 drilled from one of a shaft and an underground excavator that excavates toward the shaft, and a magnetic field generator 42 provided at the tip of the boring 41 are also shown. And a matrix-shaped magnetic field receiver 50 provided on the other front surface of the shaft and an underground machine that excavates toward the shaft.

[Operation] The above-described first configuration is applied to the case of two underground excavators whose underground joints face each other. The matrix-shaped magnetic field receiver 50 in front of the underground excavator 11 on the other side is connected to the underground excavator 12 on one side.
The most intense reaction occurs at the matrix point closest to the magnetic field generator 42 at the tip of the boring 41 excavated from above. By expressing this in a bird's-eye view, the operator can immediately visually confirm the underground joining accuracy.
Further, the magnetic field receiver 50 can always grasp each point of the matrix as coordinates with respect to the excavation planning line on the other side, while the magnetic field generator 42 can always grasp each point as coordinates with respect to the excavation planning line on one side. . Therefore, by comparing the two coordinate systems, it is possible to quantitatively grasp the relative eccentricity and the relative eccentricity, that is, the relative error.

The second configuration is applied to a case where the underground connection is one underground excavator and a shaft, and the operation is the same as that of the first configuration.

Example An example will be described with reference to FIG. Embodiment 1
As shown in the figure, when the two excavated rotary excavating shield machines 11 and 12 are separated from each other by about 30 to 40 m and approach each other, the small rotary excavating shield machine 12 provided on the front of Of the rotary excavating shield machine 12 from the predetermined reference point of the drilling machine (not shown). That is, as mentioned above,
With recent surveying technology, both rotary drilling shield machines 11,1
Although some eccentricity and declination occur between the two excavation planning lines, the tip of the boring 41 comes into contact with the front surface of the rotary excavation type shield machine 11 on the other side which has excavated oppositely.
A position detecting device is provided on the boring 41 and the front surface of the rotary excavating shield machine 11 on the other side. First, the boring 41 has a built-in magnetic field generator 42 at its tip (specifically, a predetermined portion slightly away from the leading edge). More specifically, the magnetic field generator 42 is a single coil, and is arranged such that the magnetic field axis of the coil is in the direction of excavation. On the other hand, the rotary excavating shield machine 11 on the other side has a magnetic field receiver 50 arranged in a matrix on the front surface (or inside the front surface). Specifically, the magnetic field receiver 50 has a plurality of vertical and horizontal coils arranged in a matrix.
The coils are arranged so that the magnetic field axis of each coil is in the direction of excavation.

The operation of the embodiment will be described. The received voltage of each coil of the magnetic field receiver 50 increases as the extension of the center axis of the coil is closer to the center axis of the coil of the magnetic field generator 42. Therefore, the coil of the magnetic field generator 42 is located on an extension of the center axis of the coil having the largest received voltage among the coils in the matrix. Therefore, if the coordinates of the magnetic field generator 42 and the coordinates of each coil of the magnetic field receiver 50 are prepared in advance, the relative error can be easily grasped by calculation.

By using the embodiment and connecting each output of the matrix of the magnetic field receiver 50 to a microcomputer and a CRT display, a relative error can be quantitatively calculated and displayed visually, and the operator can be displayed visually. It is also easy to display a very easy-to-understand bird's-eye view or the like.

[Effects of the Invention] As described above, the propulsion management surveying device for underground excavation of an underground excavator according to the present invention has a difference in the first and second configurations, but this depends on the use conditions. . That is, claim 1 is applied to a case where two underground excavators are opposed to each other, and claim 2 is applied to a case where one underground joint is an underground excavator and a shaft. In any case, a matrix-shaped magnetic field receiver is provided inside one of the pits, and a boring provided with a magnetic field generator at the tip is penetrated from the other opposing pit, and the magnetic field generator is used by the magnetic field receiver. This is a configuration for detecting the position of. Both these magnetic field receivers and magnetic field generators
Since the position is known in advance and the received signal of the magnetic field receiver is an easy-to-handle electric signal, the present invention can be freely used (for example, display on a CRT display). That is, according to the present invention, the present invention can be applied to underground excavation of a small diameter that humans cannot enter, and it is possible to further contribute to automation (labor saving).

[Brief description of the drawings]

FIG. 1 is a perspective view of two underground excavators whose underground joints are opposed to each other, and the implementation of the propulsion management and surveying device for underground excavation of underground excavators according to claim 1 of the present invention. Example configuration diagram Fig. 2: Perspective drawing of underground bonding based on conventional technology Fig. 3: Front view of light receiving surface of laser receiver based on conventional technology 11,12: Underground excavator, 41: Boring, 42 : Magnetic field leprosy, 5
0: Matrix magnetic field receiver

Continuing on the front page (72) Inventor Shoichi Sakanishi 1200 Manda, Hiratsuka-shi, Kanagawa Prefecture, Komatsu Ltd.Laboratory (72) Inventor Tetsuya Shinbo 1200, Manda, Hiratsuka-shi, Kanagawa Komatsu Ltd., Laboratory (56) References 1-274769 (JP, A) JP-A-62-5117 (JP, A) JP-A-3-246483 (JP, A) JP-B-51-30972 (JP, B1) (58) Fields investigated (Int. Cl ^6, DB name) G01C 15/00 G01V 3/08 -. 3/11 E21D 9/06 - 9/10

Claims (2)

(57) [Claims] 1. A magnetic field generator (42) is provided at the tip of a boring (41) drilled from one underground excavator (12), and excavates in opposition to said one underground excavator (12). A submersible underground joint propulsion management and surveying device, wherein a matrix magnetic field receiver (50) is provided in front of the other underground excavator (11). 2. A boring (41) drilled from one of a shaft and an underground excavator excavating toward the shaft, and a magnetic field generator (41) provided at the tip of the boring (41). 42), and a matrix-shaped magnetic field receiver (50) provided on the other front surface of the shaft and an underground machine that excavates toward the shaft. For propulsion management surveying equipment.