JP6672671B2 - Drilling monitoring device - Google Patents

Description

The present invention, tunnel boring machine (Tunnel Boring Machine: hereinafter, referred to as TBM) about the drilling monitoring equipment for monitoring the rock drilling due.

  The TBM is generally an excavator suitable for excavating medium soft rock such as a mountain tunnel. The cutter drum provided at the tip of the TBM is provided with a plurality of disk cutters that rotate to break rock. The chips crushed by the disk cutter are sequentially taken into the chamber by the rotation of the cutter drum, and are discharged backward by a screw conveyor or a belt conveyor.

  A technique for estimating the rock mass strength of the ground using such a TBM has been proposed (for example, see Patent Document 1). In Patent Literature 1, the compressive strength of the rock is estimated from the detected hydraulic pressure and the amount of protrusion of the propulsion cylinder device.

JP-A-11-303583

  However, the compressive strength estimated by the prior art does not take into account the damage of the disk cutter. That is, if the rock to be excavated cannot obtain a sufficient reaction force, the disk cutter causes uneven wear and extremely shortens its life. Then, if the cutting is continued with the disk cutter as it is, the bearing (bearing) supporting the disk cutter may be damaged, and finally, there is a danger that the cutter head face plate main body may be damaged. The impact on such damage, the removal of debris in the face, the securing of work space, the repair and construction of the faceplate, is immense.

The present invention has been made in view of such a situation is to solve the problems described above, provides a drilling monitoring equipment that can determine the damage of the disc cutter with high probability.

An excavation monitoring device of the present invention is an excavation monitoring device that monitors an excavation operation of a tunnel excavator equipped with a disk cutter, and excavation information for collecting excavation data that is a measurement value obtained by measuring an excavation operation of the tunnel excavator. A collecting unit, an input unit for receiving an input of the brittleness of the shears excavated by the tunnel excavator, and storage for storing the brittleness input from the input unit as brittleness data together with the data of the tunnel excavator. Department and
Using the excavation data collected by the excavation information collection unit, the specification data and the brittleness data stored in the storage unit, a value obtained by dividing the excavation speed of the tunnel excavator by the rotation speed of the disk cutter. A uniaxial compressive stress calculating unit for sequentially calculating a uniaxial compressive stress of a rock showing a rock strength in a rock mass state at a face before excavation by a calculation model in which a cutting amount of the disc cutter is used, and the uniaxial compressive stress calculating unit sequentially calculates An output unit that outputs the calculated uniaxial compressive stress, and a damage of the disk cutter based on the uniaxial compressive stress sequentially calculated by the uniaxial compressive stress calculator and the brittleness input to the input unit. A digging situation determination unit that determines the presence or absence of a digging situation, wherein the digging situation determination unit is sequentially calculated by the uniaxial compressive stress calculation unit. Even if the change amount of the uniaxial compressive stress increases or decreases beyond the UCS threshold, the change in the brittleness input to the input unit exceeds the brittleness threshold with respect to the brittleness stored in the storage unit. If there is no, instructs the tunnel excavator to change the rotation speed of the disk cutter, and the uniaxial compression stress sequentially calculated by the uniaxial compression stress calculation unit does not change with the change in the rotation speed of the disk cutter. In this case, the disc cutter is determined to be damaged .
Et al is, in drilling monitoring device of the present invention, the drilling state determination section, together with the variation of the uniaxial compressive stress sequentially calculated by the uniaxial compressive stress calculating unit is increased beyond the UCS threshold, the input If the brittleness which is input to the section is reduced beyond the brittleness threshold to the brittleness stored in the storage unit, it has dropped further drilling speed of the tunneling machine, as the drilling situation It may be determined that the tunnel excavator is fastened by a bad ground .

  According to the present invention, damage to the disk cutter can be determined with a high probability by monitoring the uniaxial compressive stress (UCS) output to the output unit 35.

It is a sectional side view showing the composition of the tunnel excavator which the excavation monitoring device concerning the present invention monitors. It is a block diagram showing composition of an excavation monitoring device concerning the present invention. FIG. 2 is a diagram illustrating a relationship between a cutting angle and a cutting amount of the disk cutter illustrated in FIG. 1. FIG. 3 is a diagram illustrating a display example of an output unit illustrated in FIG. 2. FIG. 3 is a diagram illustrating a correlation between a uniaxial compressive stress (UCS) calculated by a UCS calculation unit shown in FIG. 2 and a degree of brittleness. 3 is a flowchart illustrating an operation of determining an excavation state by an excavation state determination unit illustrated in FIG. 2.

Next, embodiments for implementing the present invention (hereinafter, simply referred to as “embodiments”) will be specifically described with reference to the drawings.
The excavation monitoring device according to the present embodiment is an information processing device such as a computer that monitors rock excavation by a tunnel excavator 1 (tunnel boring machine: hereinafter, referred to as TBM1).

  The TBM 1 includes a front trunk 2 and a rear trunk 3. A cutter drum 4 provided for a plurality of disk cutters 20 is rotatably disposed at the tip of the front body 2. A chamber 6 partitioned by a partition wall 5 is formed on the rear side of the cutter drum 4. In the chamber 6, a screw conveyor 7 having a front end inlet located in the chamber 6 is provided through the partition wall 5. As a result, the excavation waste taken into the chamber 6 with the rotation of the cutter drum 4 is taken out of the chamber 6 by the screw conveyor 7, and is discharged backward.

  An erector 9 for assembling the segment 8 is arranged on the rear trunk 3. Further, a shield jack 10 for propelling the TBM 1 is disposed in the rear trunk portion 3. By extending the shield jack 10 and pressing the tip of the assembled segment 8 via the spreader 11, the entire TBM 1 is advanced and the cutter drum 4 is pressed against the bedrock (face). An operating sled 12 is provided on the front body 2 so as to be able to protrude and retract toward the outer periphery of the front body 2. Further, the front trunk portion 2 and the rear trunk portion 3 are extended and contracted by a center-folding jack 13.

  Referring to FIG. 2, the excavation monitoring device 30 is an information processing device such as a personal computer, and includes an excavation information collection unit 31, an input unit 32, a storage unit 33, a UCS calculation unit 34, an output unit 35, A brittleness comparison unit 36 and an excavation status determination unit 37 are provided.

  The excavation information collection unit 31, the UCS calculation unit 34, the brittleness comparison unit 36, and the excavation status determination unit 37 are microcomputers including a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. And the like. A control program for controlling the operation of the excavation monitoring device 30 is stored in the ROM. The CPU reads the control program stored in the ROM and expands the control program in the RAM, thereby functioning as the excavation information collection unit 31, the UCS calculation unit 34, the brittleness comparison unit 36, and the excavation state determination unit 37.

The excavation information collecting unit 31 calculates the excavation speed of the TBM 1: v [mm / min], the rotation speed of the disc cutter 20: R _pm [rev / min], and the thrust of the disc cutter 20 as the measurement values measured during the excavation operation. (The force with which one disc cutter 20 is pressed against the rock): Fn [MPa] is collected from the TBM control device 40 that controls the operation of the TBM 1 as excavation data. Note that the excavation speed: v of the TBM 1 is, for example, the extension speed of the shield jack 10. Alternatively, the displacement amount of the shield jack 10 may be collected from the TBM control device 40 as a numerical value obtained during excavation, and the excavation information collection unit 31 may calculate the excavation speed: v of the TBM 1. Further, the shield jack 10 is a hydraulic jack. Therefore, the thrust Fn of the disk cutter 20 is obtained by collecting the oil pressure of the shield jack 10 from the TBM control device 40 to obtain the thrust Fs of the cutter drum 4 and converting the obtained thrust Fs of the cutter drum 4 to the disk cutter 20. The total number can be calculated by dividing by N. If necessary, a soil pressure gauge for measuring the soil pressure of the face may be provided, and the measured soil pressure of the face may be subtracted from the thrust Fn.

  The input unit 32 is input means such as a keyboard. The storage unit 33 is a non-volatile storage unit such as an HDD and a semiconductor memory. The input unit 32 receives input of a blade edge width of the disk cutter 20: T [mm], a radius of the disk cutter 20: R [mm], a constant: C, and a distance between the disk cutters 20: S [mm]. The inputted blade edge width of the disk cutter 20: T, the radius of the disk cutter 20: R, the constant: C, and the distance between the disk cutters 20: S are stored in the storage unit 33 as specification data 331 of the TBM1. Is done. The input unit 32 receives an input of the degree of brittleness of the rock: K, and the inputted degree of brittleness of the rock: K is stored in the storage unit 33 as brittleness data 332. Rock embrittlement: K is measured by a uniaxial compression test or a crack-tension test using waste as a rock sample. For example, for the uniaxial compression test, a point load tester (point load tester) that can easily determine rock strength can be used. The storage unit 33 may store the brittleness: K of the rock sample collected before excavation as an initial value of the brittleness data 332.

  The UCS calculation unit 34 uses the excavation data collected by the excavation information collection unit 31, the specification data 331 and the brittleness data 332 stored in the storage unit 33, and performs real-time uniaxial compressive stress (UCS) during excavation. Is calculated.

The operation of calculating the uniaxial compressive stress (UCS) by the UCS calculator 34 will be described.
According to a calculation model derived from data analysis of Colorado Mining University (CSM), the cutting depth of the disk cutter 20: P [mm / rev] is determined by the excavation speed of the TBM 1: v and the rotation speed of the disk cutter 20: R It is expressed by the following equation [Equation 1] using _pm .

  Further, as shown in FIG. 3, when the angle from the forefront of the disk cutter 20 cut into the rock to the face face is a cutting angle: θ [rad], the cutting angle: θ is Using the depth of cut: P and the radius of the disk cutter 20: R, it is expressed by the following equation [Equation 2].

When the cutting angle: θ is used, the thrust: Fn and the required rock crushing power: P ^* [MPa] required for the disk cutter 20 to crush the rock are represented by the following equation [Equation 3]. In [Equation 3], T is the blade width [mm], C is a constant of 2.1 to 2.7, S is the distance [mm] between the disc cutters 20, and σc is the uniaxial compressive stress [MPa]. ], Σt is the tensile strength at break [MPa].

  Here, X, Y, and Z are defined as shown in the following equation [Equation 4]. In [Equation 4], the edge width of the disk cutter 20: T, the radius of the disk cutter 20: R, the constant: C, and the distance between the disk cutters 20: S are the specification data 331 of the TBM1. Therefore, X and Y are determined by the cutting angle: θ.

  Then, the thrust Fn is expressed by the following equation [Equation 5] using X, Y, and Z.

  The uniaxial compressive stress: σc [MPa] and the rupture tensile strength: σt [MPa], which are terms of Z, are expressed by the following formula [Equation 6] using the brittleness of rock: K.

  Therefore, Z defined by [Equation 4] is expressed by the following equation [Equation 7] using the uniaxial compressive stress: σc and the brittleness of rock: K.

  By substituting [Equation 7] into [Equation 5] and adjusting the form to an expression for obtaining the uniaxial compressive stress: σc [MPa], the following expression [Equation 8] is obtained.

  The UCS calculation unit 34 calculates the [Equation 8] using the excavation data collected by the excavation information collection unit 31 and the specification data 331 and the brittleness data 332 stored in the storage unit 33, thereby obtaining one axis. Calculate the compressive stress (UCS). Note that the UCS calculation unit 34 sequentially calculates the uniaxial compressive stress (UCS) every predetermined time or every time the TBM 1 advances a predetermined distance.

  The output unit 35 is a display device such as a liquid crystal display. As shown in FIG. 4, the uniaxial compressive stress (UCS) calculated by the UCS calculation unit 34 is displayed as a graph in real time. Although the graph shown in FIG. 4 shows an example in which the vertical axis represents uniaxial compressive stress (UCS) and the horizontal axis represents excavation distance, the horizontal axis may represent time. The section A shown in FIG. 4 is a section in which it is considered that the disk cutter 20 has been damaged. Section B shown in FIG. 4 is a bedrock section where the joining state between the face and the disc cutter 20 is incomplete after the disc cutter 20 is replaced.

  The brittleness comparison unit 36 compares the brittleness: K input from the input unit 32 with the brittleness: K (previous measurement result) stored as the brittleness data 332 in the storage unit 33, and compares the comparison result. It outputs to the excavation situation judgment part 37. After performing the comparison, the brittleness comparing unit 36 updates and stores the brittleness: K input from the input unit 32 as brittleness data 332 in the storage unit 33.

  The excavation condition determination unit 37 determines the excavation condition based on the uniaxial compressive stress (UCS) calculated by the UCS calculation unit 34 and the comparison result of the brittleness comparison unit 36 on the brittleness degree: K. The excavation situation determination unit 37 distinguishes and determines the excavation situation from “failure of a sensor or the like”, “tightening due to bad ground”, and “damage to a disk cutter”. Stops the excavation operation of the TBM1. Note that, in the rock surface uneven section indicated by B in FIG. 4, the uniaxial compressive stress (UCS) greatly changes even in a normal excavation operation. Therefore, in a predetermined section after the replacement of the disk cutter 20, the determination operation by the excavation status determination unit 37 may be stopped.

Here, the correlation between the change in brittleness: K (change in lithology) and the change in uniaxial compressive stress (UCS) will be described with reference to FIG.
According to [Equation 8], when the brittleness: K increases, the uniaxial compressive stress (UCS) also increases, and when the brittleness: K decreases, the uniaxial compressive stress (UCS) also decreases. Therefore, the case where the uniaxial compressive stress (UCS) and the degree of brittleness: K both increase and the case where both decrease are the states where the excavation operation of the TBM 1 is normally performed.

  On the other hand, when the uniaxial compressive stress (UCS) increases or decreases in spite of the fact that the brittleness: K does not change, the cut amount: P may be changed, and the disc cutter 20 may be damaged. There is.

  Further, it is originally impossible that the uniaxial compressive stress (UCS) decreases as the brittleness: K increases, and it is considered that some trouble such as a failure of a sensor for collecting excavation data has occurred in the TBM1. .

  Furthermore, when the brittleness: K decreases, the uniaxial compressive stress (UCS) increases with the decrease in the brittleness: K, although the excavation speed: v of the TBM1 should originally increase, and the excavation of the TBM1 When the speed: v decreases, it is conceivable that the TBM 1 is tightened by a defective ground. Further, even if the uniaxial compressive stress (UCS) increases with a decrease in the brittleness: K, if the excavation speed: v of the TBM 1 does not decrease, this is essentially impossible, and a failure of the sensor that collects excavation data. Is considered to have occurred in the TBM1. In the excavation operation of the TBM 1, a constant amount of oil is supplied to the shield jack 10 per unit time so that the oil pressure is not varied. Therefore, when the excavation speed: v of the TBM 1 increases, the thrust Fn decreases, and when the excavation speed: v of the TBM 1 decreases, the thrust Fn increases. Therefore, the thrust: Fn can be used for the determination instead of the excavation speed: v.

  The excavation situation determination unit 37 performs an excavation situation determination operation based on the correlation shown in FIG. Hereinafter, the operation of determining the excavation status by the excavation status determination unit 37 will be described in detail with reference to FIG.

  The excavation condition determination unit 37 monitors a change in the uniaxial compressive stress (UCS) calculated by the UCS calculation unit 34 (Step A1). For example, the excavation situation determination unit 37 determines that there is a change in the uniaxial compressive stress (UCS) when the amount of change in the uniaxial compressive stress (UCS) per unit excavation distance or unit time exceeds a preset UCS threshold.

  When the excavation condition determination unit 37 determines that there is a change in the uniaxial compressive stress (UCS) in step A1, it outputs a message requesting a retest of the brittleness to the output unit 35 (step A2), and the brittleness to the input unit 32. It waits for the input of a degree (step A3). The output from the output unit 35 of the message requesting the re-test of the brittleness in step A2 is based on the premise that the brittleness test is performed manually. When the brittleness test is performed mechanically by a brittleness tester, the brittleness tester is instructed to the brittleness tester in step A2.

  When the brittleness is input to the input unit 32 in step A3, the brittleness comparing unit 36 determines the brittleness: K input from the input unit 32 and the brittleness stored as the brittleness data 332 in the storage unit 33: K (the previous measurement result), and outputs the comparison result to the excavation status determination unit 37. Then, the excavation situation determining unit 37 determines whether or not there is a change in the brittleness based on the comparison result by the brittleness comparing unit 36 (step A4). The excavation situation determining unit 37 determines that the brittleness has changed when the brittleness changes beyond the brittleness threshold. Note that the brittleness threshold value may be a preset value or may be changed according to the amount of change in uniaxial compressive stress (UCS). When the brittleness threshold is changed according to the change in the uniaxial compressive stress (UCS), the brittleness threshold may be changed to a larger value as the change in the uniaxial compressive stress (UCS) increases.

  If there is a change in the brittleness in step A4, the excavation situation determination unit 37 determines whether the change in the uniaxial compressive stress (UCS) in step A1 is an increase in the uniaxial compressive stress (UCS) (step A5).

  If the uniaxial compressive stress (UCS) is increased in step A5, the excavation situation determination unit 37 determines whether the change in brittleness in step A4 is an increase in brittleness (step A6).

  If the brittleness is increased in step A6, the uniaxial compressive stress (UCS) and the brittleness: K are both increased, so the excavation condition determination unit 37 determines that the excavation operation of the TBM 1 is normal, Returning to A1, the change in uniaxial compressive stress (UCS) is monitored.

  When the brittleness is decreased in step A6, the excavation condition determination unit 37 determines whether the excavation speed: v of the TBM 1 is reduced (step A7).

  When the excavation speed: v of the TBM 1 is decreased in step A7, the excavation condition determination unit 37 increases the uniaxial compressive stress (UCS) as the brittleness: K decreases, and the excavation speed: v of the TBM 1 decreases. Therefore, it is determined that the TBM 1 is being tightened by the defective ground ("tightening by the defective ground") (step A8). Then, the excavation condition determination unit 37 outputs a “tightening warning” notifying that the TBM 1 is tightened by the defective ground from the output unit 35 (step A9), and instructs the TBM control device 40 to stop the excavation operation. (Step A10). With the “tightening warning”, the worker can confirm the “tightening due to bad ground” of the TBM 1 at an early stage and take measures.

  In step A7, when the excavation speed: v of the TBM1 is increased, the excavation speed: v of the TBM1 is not decreased even if the uniaxial compressive stress (UCS) is increased due to the decrease in the brittleness: K. The situation determination unit 37 determines that the sensor or the like that collects the excavation data is in a failure state, that is, “the failure of the sensor or the like” (step A11). Then, the excavation status determination unit 37 outputs a “failure warning” from the output unit 35 to notify that the sensor for collecting the excavation data has failed (step A12), and the excavation operation is performed by the TBM control device 40 in step A10. To stop. The “failure warning” allows the worker to confirm and deal with the TBM1 (such as a failure of a sensor for collecting excavation data) at an early stage.

  If the uniaxial compressive stress (UCS) is decreased in step A5, the excavation situation determination unit 37 determines whether the change in brittleness in step A4 is an increase in brittleness (step A13).

  If the brittleness is decreased in step A13, the uniaxial compressive stress (UCS) and the brittleness: K are both reduced, so the excavation condition determination unit 37 determines that the excavation operation of the TBM1 is normal, and proceeds to step A13. Returning to A1, the change in uniaxial compressive stress (UCS) is monitored.

  If the brittleness is increased in step A13, the uniaxial compressive stress (UCS) is reduced with an increase in the brittleness: K, so the excavation condition determination unit 37 proceeds to step A11 to collect excavation data. Failure of sensor etc. ".

  If there is no change in the brittleness in step A4, the excavation situation determination unit 37 determines whether the change in uniaxial compressive stress (UCS) in step A1 is an increase in uniaxial compressive stress (UCS) (step A14).

If the uniaxial compressive stress (UCS) is increased in step A14, the excavation situation determination unit 37 instructs to decrease the rotation speed: R _pm [rev / min] of the disk cutter 20 (step A15). Then, the excavation situation determination unit 37 determines whether the uniaxial compressive stress (UCS) calculated by the UCS calculation unit 34 decreases (step A16).

If the uniaxial compressive stress (UCS) decreases in step A16, the excavation condition determining unit 37 determines that the excavation operation of the TBM 1 is normal, returns to step A1, and monitors the change in the uniaxial compressive stress (UCS). . That is, if the disk cutter 20 is functioning normally, the rotational speed of the disk cutter 20: R _pm [rev / min] is decreased, so that the cutting amount P of the disk cutter 20 increases, and the uniaxial compressive stress ( UCS) decreases.

If the uniaxial compressive stress (UCS) does not decrease in step A16, the digging situation determination unit 37 determines that the disk cutter 20 is damaged, that is, the disk cutter is damaged (step A17). That is, if the uniaxial compressive stress (UCS) does not decrease even when the rotation speed of the disk cutter 20: R _pm [rev / min] is reduced, the cutting of the disk cutter 20 into the face is normally performed. This means that the disk cutter 20 is not functioning properly. Then, the excavation status determination unit 37 outputs a “cutter damage warning” from the output unit 35 to notify that the disc cutter 20 may be damaged (step A18), and proceeds to step A10 where the TBM control device 40 stops the excavation operation. Instruct. The "cutter damage warning" allows the operator to grasp the damage of the disk cutter 20 at an early stage, and to replace the disk cutter 20 before it becomes important.

If the uniaxial compressive stress (UCS) is decreased in step A14, the excavation situation determination unit 37 instructs to increase the rotation speed: R _pm [rev / min] of the disk cutter 20 (step A19). Then, the excavation situation determination unit 37 determines whether the uniaxial compressive stress (UCS) calculated by the UCS calculation unit 34 increases (step A20).

When the uniaxial compressive stress (UCS) increases in step A20, the excavation condition determination unit 37 determines that the excavation operation of the TBM 1 is normal, returns to step A1, and monitors the change in the uniaxial compressive stress (UCS). . That is, if the disk cutter 20 is functioning normally, the rotational speed of the disk cutter 20: R _pm [rev / min] is increased, so that the cutting amount P of the disk cutter 20 decreases, and the uniaxial compressive stress ( UCS) increases.

If the uniaxial compressive stress (UCS) does not increase in step A20, the excavation condition determination unit 37 determines in step A17 that the disk cutter 20 is damaged, that is, the disk cutter 20 is damaged. That is, if the uniaxial compressive stress (UCS) does not increase even when the rotation speed of the disk cutter 20: R _pm [rev / min] is increased, the cutting of the disk cutter 20 into the face is normally performed. This means that the disk cutter 20 is not functioning properly.

As described above, the present embodiment is an excavation monitoring device 30 that monitors the excavation operation of the TBM 1 provided with the disc cutter 20, and excavation information that collects excavation data that is a measurement value obtained by measuring the excavation operation of the TBM 1. The brittleness: K input from the input unit 32 is stored as the brittleness data 332 along with the collection unit 31, the input unit 32 that receives the input of the brittleness: K of the waste excavated by the TBM1, and the specification data 331 of the TBM1. Using the storage unit 33, the excavation data collected by the excavation information collection unit 31, and the specification data 331 and the brittleness data 332 stored in the storage unit 33, the excavation speed of the TBM 1: v is changed to the rotation speed of the disk cutter 20: Using a calculation model in which the value obtained by dividing the value divided by Rpm is the depth of cut of the disc cutter 20: P, the uniaxial compressive stress (UC ) And UCS calculator 34 sequentially calculates a, and an output unit 35 for outputting a uniaxial compressive stress (UCS), which is sequentially calculated by the UCS calculator 34.
With this configuration, by monitoring the uniaxial compressive stress (UCS) output to the output unit 35, the damage of the disk cutter 20 can be determined with a high probability. That is, the uniaxial compressive stress (UCS) calculated by the UCS calculation unit 34 is calculated by dividing a value obtained by dividing the excavation speed: v of the TBM 1 by the rotation speed of the disk cutter 20: Rpm into a cutting amount: P of the disk cutter 20. Calculated by model. Therefore, the uniaxial compressive stress (UCS) calculated by the UCS calculator 34 changes due to the damage of the disk cutter 20, and the damage of the disk cutter 20 can be determined with high probability by paying attention to this change.

Further, in the present embodiment, there is provided an excavation status determination unit 37 that determines the excavation status based on the uniaxial compressive stress (UCS) sequentially calculated by the UCS calculation unit 34 and the brittleness: K input to the input unit 32. ing.
With this configuration, it is possible to make a determination in consideration of a change in the bedrock.

Furthermore, in the present embodiment, the excavation situation determination unit 37 inputs the input to the input unit 32 even if the change amount of the uniaxial compressive stress (UCS) sequentially calculated by the UCS calculation unit 34 increases or decreases beyond the UCS threshold value. If there is no change in the brittleness: K that exceeds the brittleness threshold with respect to the brittleness data 332 stored in the storage unit 33, the TBM 1 is instructed to change the rotation speed: R _pm of the disk cutter 20, and the disk cutter rotation rate of _20: when the uniaxial compressive stress with the change of the _{R pm} is sequentially calculated by the UCS calculator 34 (UCS) is not changed, it is determined that damage to the disc cutter 20.
With this configuration, the operator can grasp the damage of the disk cutter 20 at an early stage, and can exchange the disk cutter 20 before it becomes important.

Furthermore, in the present embodiment, the excavation situation determination unit 37 determines that the amount of change in the uniaxial compressive stress (UCS) sequentially calculated by the UCS calculation unit 34 exceeds the UCS threshold and increases the brittleness input to the input unit 32. Degree: K is determined to be smaller than the brittleness threshold with respect to the brittleness data 332 stored in the storage unit 33, and if the excavation speed of the TBM1 is further reduced, the TBM1 is tightened by the defective ground. I do.
With this configuration, the worker can confirm the "tightening due to the bad ground" of the TBM 1 at an early stage, and can take measures such as enlarging the outer diameter of the excavation.

  The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to the combination of the components, and that such modifications are also within the scope of the present invention.

1 Tunnel excavator (TBM)
2 Front trunk 3 Rear trunk 4 Cutter drum 5 Partition wall 6 Chamber 7 Screw conveyor 8 Segment 9 Electa 10 Shield jack 11 Spreader 12 Operating sled 13 Bending jack 20 Disk cutter 30 Excavation monitoring device 31 Excavation information collecting unit 32 Input unit 33 Storage unit 34 UCS calculation unit 35 Output unit 36 Brittleness comparison unit 37 Excavation situation determination unit 40 TBM control device 331 Specifications data 332 Brittleness data

Claims (2)

An excavation monitoring device for monitoring the excavation operation of a tunnel excavator having a disk cutter,
An excavation information collecting unit that collects excavation data that is a measurement value obtained by measuring an excavation operation of the tunnel excavator,
An input unit that receives an input of brittleness of a shear excavated by the tunnel excavator,
A storage unit that stores the brittleness inputted from the input unit as brittleness data, together with the data of the tunnel excavator,
Using the excavation data collected by the excavation information collection unit, the specification data and the brittleness data stored in the storage unit, a value obtained by dividing the excavation speed of the tunnel excavator by the rotation speed of the disk cutter. A uniaxial compressive stress calculation unit that sequentially calculates the uniaxial compressive stress of the rock indicating the rock strength in the rock mass state at the face before excavation in a calculation model with the cutting amount of the disc cutter as
An output unit that outputs the uniaxial compressive stress sequentially calculated by the uniaxial compressive stress calculation unit,
An excavation situation determination unit that determines whether the disk cutter is damaged as an excavation situation based on the uniaxial compression stress sequentially calculated by the uniaxial compression stress calculation unit and the brittleness input to the input unit. And
The excavation situation determination unit, even if the change amount of the uniaxial compressive stress sequentially calculated by the uniaxial compressive stress calculation unit increases or decreases beyond the UCS threshold, the brittleness input to the input unit is the brittleness If there is no change exceeding the brittleness threshold value for the brittleness stored in the storage unit, instruct the tunnel excavator to change the rotation speed of the disk cutter, and with the change in the rotation speed of the disk cutter. An excavation monitoring device characterized in that when the uniaxial compressive stress sequentially calculated by the uniaxial compressive stress calculator does not change, it is determined that the disc cutter is damaged . The excavation situation determination unit is configured such that the amount of change in the uniaxial compressive stress sequentially calculated by the uniaxial compressive stress calculator increases beyond the UCS threshold, and the degree of brittleness input to the input unit is the storage unit. In the case where the brittleness stored above is reduced beyond the brittleness threshold and the excavation speed of the tunnel excavator is further reduced, the tunnel excavator is tightened by a bad ground as the excavation situation. The excavation monitoring device according to claim 1 , wherein the excavation monitoring device is determined to be in operation.

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