JP3914316B2 - Slipping system in tunnel excavation by mobile conveyor and blasting method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a mobile conveyor used for tunnel excavation by a blasting method using civil engineering technology and a slippage removal system in tunnel excavation by a blasting method.
[0002]
[Prior art]
As shown in FIG. 5, for example, this type of conventional conveyor-type slippage system uses a single heavy machine 102 having a crawler traveling body 102a in a central portion of a conveyor 101 having a configuration similar to that of a normal one. A fixed continuous transfer conveyor 107 connected to a wellhead by connecting a plurality of movable conveyors 103 supported so as to be able to move up and down and tilt, and a connected conveyor formed by connecting a movable crusher 106 arranged near the face 104. After preparing in front of the other subsequent equipment, the gap 105 generated at the face 104 is loaded on the mobile crusher 106 by the wheel loader 108, pulverized to have the particle size, and then a plurality of mobile conveyors 103, and It is to be continuously transported to the wellhead by the continuous transport conveyor 107, and moves following the progress of the face 104. Movement by self crusher 106 and mobile conveyor 103, and the extension of the continuous conveyor 107 are repeated.
[0003]
Therefore, according to such a slipping system, in addition to preventing the deterioration of the working environment in the mine due to the exhaust gas, which has been a problem in the vehicle slipping system, the blasting after the slipping 105 is issued. When shifting to work, the mobile conveyor 103, the wheel loader 108, and the mobile crusher 106 can be retreated to the rear from the continuous transport conveyor 107 by self-running, and the slipping and blasting operations can be performed smoothly and quickly. It is possible to switch to.
[0004]
However, in such a slipping system, when the face 104 advances and the distance between the face 104 and the mobile crusher 106 is about to be increased, the distance between the face 104 and the mobile crusher 106 can be adjusted only intermittently. Therefore, the following inconvenience exists.
[0005]
That is, since the moving conveyor 103 cannot be added unless the cutting face 104 advances at least by a distance corresponding to the length of one moving conveyor 103, the cutting face 104, the moving crusher 106, In the state where the distance is considerably long, the reciprocation by the wheel loader 108 is repeated, and the slip 105 generated on the face 104 must be loaded on the movable crusher 106, and an efficient slipping operation cannot be performed.
[0006]
On the other hand, if the distance between the face 104 and the movable crusher 106 is adjusted by extending the continuous conveyer 107, not only one continuous conveyer 107 is added, but also a work cart, a slide centle, a seat as a subsequent facility. A fairly large-scale setup change such as moving a tension carriage or the like must be frequently performed.
[0007]
On the other hand, from the standpoint of avoiding the above inconvenience, the entire length of the mobile conveyor 103 connected by wrapping the mobile conveyor 103 is expanded and contracted, whereby the distance between the face 104 and the mobile crusher 106 is increased. Assuming the case of continuous adjustment, the following technical problems exist.
[0008]
That is, the mobile conveyor 103 is basically unstable because the central portion is supported by only one heavy machine, and in particular, in the state where the mobile conveyor 103 is wrapped together, When it is bad, the free end side of the conveyor may swing, which is extremely dangerous.
[0009]
Moreover, even if measures to avoid such a danger can be taken, the lap length of the mobile conveyor 103 is mutually increased because the heavy machinery supporting the central portion becomes an obstacle when the mobile conveyor 103 is wrapped together. Since the length of expansion and contraction of the connected mobile conveyor 103 as a whole is shortened, the distance between the face 104 and the mobile crusher 106 can be adjusted only with a short stroke. The above inconvenience cannot be avoided completely.
[0010]
[Problems to be solved by the invention]
Therefore, the present invention can adjust the distance between the face and the foremost part of the connecting conveyor continuously and with a long stroke following the progress of the face, so that the subsequent equipment including the continuous conveyor can be replaced. It is an object of the present invention to provide a mobile conveyor that can reduce the amount and thereby realize an efficient and stable slipping operation and a slipping system in tunnel excavation by a blasting method.
[0011]
[Means for Solving the Problems]
That is, the moving conveyor according to the present invention, one end of the conveyor as well as vertically movably supported by one mobile, mobile to the other end of the conveyor comprising supports the elevating self standing at another mobile It is a conveyor, The said other moving body is movable along the longitudinal direction of the said conveyor, It is comprised so that it can support the different position of the said conveyor. It is.
[0012]
On the other hand, the slipping out system in tunnel excavation by the blasting method according to the present invention is characterized in that a connecting conveyor formed by connecting a plurality of the movable conveyors in a state of being overlapped with each other is provided in front of the continuous conveyor. It is what.
[0013]
In such technical means, from the viewpoint of easily evacuating the connecting conveyor when shifting to the blasting operation and effective utilization of the space in the tunnel during the evacuation, the continuous conveyance is performed. The front of the conveyor is provided with front and rear carriages and a conveyor evacuation pier constructed between the upper parts of the carriage, and the carriage and the conveyor evacuation pier form a space in which a plurality of movable conveyors can be evacuated. It is also preferable, and from the viewpoint of ensuring a stable conveyance state with a uniform grain size, it is preferable to provide a movable crusher at the forefront of the connection conveyor.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.
FIG. 1 shows an embodiment of a tunnel to which the mobile conveyor of the present invention is applied, and shows a schematic longitudinal sectional view.
[0015]
In the figure, reference numeral 1 is a tunnel excavated by a blasting method, reference numeral 2 is a face which is the foremost part of the tunnel 1, reference numeral 3 is a gap generated by crushing at the cutting face 2 due to blasting, and reference numeral 4 is crushing the gap 3. The mobile crusher for aligning the particle size, 5 is a wheel loader for transporting and loading the slip 3 generated at the face 2 to the mobile crusher 4, and 6 is pulverized by the mobile crusher 4 to have the same particle size. It is a mobile conveyor that continuously conveys the scrap 3 in the direction of the wellhead, and is connected to the first mobile conveyor 6a disposed adjacent to the mobile crusher 4 and the first mobile conveyor 6a. It comprises a second movable conveyor 6b that is deployed.
[0016]
Reference numeral 7 denotes a fixed continuous conveyor that is connected to the wellhead without a break, and reference numeral 8 denotes a continuous conveyor 7 mounted on a conveyor retreat pier 8c that is installed between the ventilation carriage 8a and the compressor carriage 8b. The ventilation carriage 8a and the compressor carriage 8b are configured to be movable on a track (not shown). Although not shown in the drawing, the continuous conveyor 7 is connected between the evacuation facility 8 and the wellhead, and a work cart, a slide centle, a seat tension cart, etc., which are the subsequent facilities, play their respective roles. Has been deployed.
[0017]
As shown in FIG. 2, the mobile conveyor 6 according to the present embodiment supports one end of the conveyor 11 by a crawler traveling body 12 as a single moving body so as to be movable up and down via a lifting device 12 a. The other end of 11 is supported on another crawler traveling body 13 via a lifting device 13a so as to be movable up and down and movable via a moving device 13b provided along the longitudinal direction. The connecting portion 14 between the elevating device 12a and the conveyor 11 and the connecting portion 15 between the elevating device 13a and the moving device 13b can be adapted to the inclination of the conveyor 11 by adopting pin joining. Yes.
[0018]
Further, when the first mobile conveyor 6a, the second mobile conveyor 6b, and the mobile crusher 4 are shifted to the blasting operation after taking out the slip 3, as shown in FIG. It passes under the 8a, enters the range of the evacuation equipment 8, and evacuates within the range until the blasting operation is completed.
[0019]
Next, a slipping system using the mobile conveyor 6 according to the present embodiment will be described with reference to FIG.
[0020]
(A) Start of slipping operation First, the crawler traveling bodies 13 of both the first movable conveyor 6a and the second movable conveyor 6b are placed on the crawler traveling body 12 side, and the first movable conveyor 6a and the second movable conveyor The wrap length with 6b and the wrap length between the second mobile conveyor 6b and the continuous transport conveyor 7 are set as large as possible, and the mobile crusher 4 is provided at the end of the first mobile conveyor 6a on the face 2a side. To do.
[0021]
At this time, the distance between the face 2a and the movable crusher 4 is set to a distance X (FIG. 4) that allows the wheel loader 5 to load the slip 3 most efficiently. To be able to work out.
[0022]
If the crawler traveling body 13 is placed on the crawler traveling body 12 side, it seems that the balance is unstable and unstable, but the weight of the crawler traveling bodies 12 and 13 is much larger than the weight of the conveyor 11 and the balance is poor. Since the conveyor 11 is supported at two points by the crawler traveling body 12 and the crawler traveling body 13 that can be ignored, the free end side is not likely to swing and is stable and safe.
[0023]
Next, the gap 3 generated at the face 2a is loaded on the mobile crusher 4 by the wheel loader 5 and pulverized to obtain a uniform particle size. Then, the first mobile conveyor 6a, the second mobile conveyor 6b, and the continuous conveyor 7 To the wellhead.
[0024]
(B) After the blasting operation and the one-span slipping operation are completed, all the heavy machinery existing from the face 2a to the continuous conveyor 7 when moving to the blasting operation, that is, the wheel loader 5 and the mobile crusher 4 After the second mobile conveyor 6b and the first mobile conveyor 6a are retracted from the retreat facility 8 to the wellhead side, a new blasting operation is performed for one span.
[0025]
(C) Slipping operation The above described steps (a) and (b) are repeated to advance the face 2a to the position of the face 2b, and follow the progress of the face 2 so that the first mobile conveyor 6a or the second mobile conveyor 6b and the mobile crusher 4 are allowed to self-run, thereby gradually increasing the wrap length between the first mobile conveyor 6a and the second mobile conveyor 6b or the wrap length between the second mobile conveyor 6b and the continuous transport conveyor 7. The distance between the face 2b and the movable crusher 4 is maintained at the distance X to the extent that the loading operation of the slip 3 by the wheel loader 5 can be performed most efficiently.
[0026]
(D) After completing the blasting operation and the shifting operation for one span, when shifting to the blasting operation, all heavy machinery existing from the face 2b to the continuous conveyance conveyor 7, that is, the wheel loader 5, the mobile crusher 4. After the second movable conveyor 6b and the first movable conveyor 6a are retracted from the retreat facility 8 to the wellhead side, a blasting operation for one span is newly performed.
[0027]
(E) End of slipping The above-described (a) and (b) are repeated to advance the face 2b to the position of the face 2c, and follow the progress of the face 2, so that the first movable conveyor 6a or the second movable conveyor 6b and the mobile crusher 4 are self-propelled, and the wrap length between the first mobile conveyor 6a and the second mobile conveyor 6b or the wrap length between the second mobile conveyor 6b and the continuous transport conveyor 7 is gradually shortened. Then, the distance between the face 2c and the movable crusher 4 is maintained at the distance X to the extent that the loading operation of the slip 3 by the wheel loader 5 can be performed most efficiently.
[0028]
Then, when the wrap length between the first mobile conveyor 6a and the second mobile conveyor 6b and the lap length between the second mobile conveyor 6b and the continuous transport conveyor 7 are both minimized, the gap 3 is processed. , And finish the slipping work.
[0029]
(F) Set-up change and after completion of the shift-out operation, the continuous transfer conveyor 7 is added and extended, and the set-up change is made by moving the work cart, slide centle, seat tension cart, etc. as the subsequent equipment. I do.
Hereinafter, the face 2 is advanced by repeating the above steps (a) to (f).
[0030]
Therefore, according to the slipping system using the mobile conveyor 6 according to the present embodiment, the distance between the face 2 and the mobile crusher 4 can be continuously adjusted following the progress of the face 2. In addition, since the wrap length between the first mobile conveyor 6a and the second mobile conveyor 6b and the wrap length between the second mobile conveyor 6b and the continuous transport conveyor 7 can be considerably increased, the distance can be set with a long stroke. Since it is possible to adjust, it is possible to reduce the setup change of the subsequent equipment including the continuous conveyer 7, and thus it is possible to perform an efficient and stable slipping operation.
[0031]
In the present embodiment, two mobile conveyors 6 are provided. However, the present invention is not limited to this, and any number of mobile conveyors 6 may be used as long as cost and evacuation space conditions are satisfied.
[0032]
【The invention's effect】
As described above, the mobile conveyor according to the present invention supports one end of the conveyor to be movable up and down by one moving body, and the other end of the conveyor can be lifted and lowered by another moving body in the longitudinal direction. The distance between the face and the foremost part of the connecting conveyor can be adjusted continuously and with a long stroke following the progress of the face. Therefore, it is possible to realize an efficient and stable slipping system in tunnel excavation by the blasting method.
[Brief description of the drawings]
FIG. 1 is a schematic longitudinal sectional view showing a tunnel to which an embodiment of a mobile conveyor of the present invention is applied.
FIG. 2 is a schematic sectional side view showing an embodiment of a mobile conveyor according to the present invention.
FIG. 3 is a schematic plan view showing a retreat facility in which an embodiment of the mobile conveyor of the present invention is retreated.
FIG. 4 is a schematic explanatory diagram of a slippage removal system using an embodiment of a mobile conveyor according to the present invention.
FIG. 5 is a schematic longitudinal sectional view showing a tunnel to which an embodiment of a conventional mobile conveyor is applied.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Tunnel 2 ... Face 2a ... Face 2b ... Face 2c ... Face 3 ... Slipping 4 ... Mobile crusher 5 ... Wheel loader 6 ... Mobile conveyor 6a ... 1st mobile conveyor 6b ... 2nd mobile conveyor 7 ... Continuous conveyance Conveyor 8 ... Evacuation facility 8a ... Ventilation carriage 8b ... Compressor carriage 8c ... Conveyor withdrawal pier 11 ... Conveyor 12 ... Crawler traveling body 12a ... Elevating device 13 ... Crawler traveling body 13a ... Elevating device 13b ... Moving device 14 ... Connection portion 15 ... Connection part 101 ... Conveyor 102 ... Heavy machine 102a ... Crawler traveling body 103 ... Mobile conveyor 104 ... Face 105 ... Slipper 106 ... Mobile crusher 107 ... Continuous transport conveyor 108 ... Wheel loader X ... Distance

Claims (4)

One end of the conveyor as well as vertically movably supported by one mobile, a mobile conveyor comprising supports the elevating self standing the other end of the conveyor at another mobile,
The other moving body is configured to be movable along the longitudinal direction of the conveyor and configured to be able to support different positions of the conveyor .
Mobile conveyor. A plurality of mobile conveyors according to claim 1 are provided in front of a continuous conveyance conveyor in a state of being wrapped with each other .
Slitting system in tunnel excavation by blasting method. The front of the continuous conveyor is provided with a front and rear carriage and a conveyor retreat pier constructed between the upper parts of the carriage,
The carriage and the conveyor evacuation pier formed a space in which a plurality of movable conveyors can be evacuated ,
A slippage removal system in tunnel excavation by the blasting method according to claim 2. In the forefront part of the connecting conveyor, a mobile crusher is provided,
A slippage removal system in tunnel excavation by the blasting method according to claim 2 or 3.

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