KR20070008198A - Shaft enlargement excavation method which uses shaft enlargement machine - Google Patents

Abstract

A tunnel enlargement method of a vertical tunnel using a tunnel enlargement machine is provided to save cost of construction and secure the construction reliability by using the tunnel enlargement machine and extending more than 7m-diameter of the tunnel. A tunnel enlargement method of a vertical tunnel using a tunnel enlargement machine comprises a perforation process of perforating the tunnel of 2~3m-diameter and forming a pilot tunnel; a first tunnel enlargement process of firstly extending the inlet of the upper part of the pilot tunnel up to 7m-diameter by human power; a blasting process of installing a machine room at the upper part of the first enlarged pilot tunnel, perforating an empty hole and a charged hole by the tunnel enlargement machine, and blasting the hole; and a waste process of waste-processing the blasted soil by the tunnel enlargement machine. The blasted depth of the tunnel enlargement is within 3~4m.

Description

Shaft enlargement excavation method which uses shaft enlargement machine

1 is a process diagram of the expansion method of the vertical tunnel according to the present invention.

Figure 2a is a plan view of the machine room applied to the present invention.

Figure 2b is a working state showing the expansion of the expansion using the expansion device according to the present invention.

3 is a view showing a blast line.

4 is a view showing a state in which the expansion device according to the present invention is raised.

5 is a view showing a state where the expansion device according to the present invention is lowered.

* Description of symbols on the main parts of the drawings *

10: machine room 12: frame

100: advanced 200: expansion

210: upper platform 214: power plant

216: lift 220: lower platform

230: drill guide 232: drill machine

240: bucket boom 242: bucket

300: expansion gang

The present invention relates to a method for expanding a vertical tunnel, and more particularly to a method for expanding a vertical tunnel using a unique excavation device to expand the ventilation gang and work tools installed in various tunnels and pole tunnels.

In the mines, vertical holes for entry and exit shafts for ventilation and materials for ventilation and vertical holes for excavation purposes were excavated with transverse tunnels, and in the case of pumping power plants, water was supplied from the large-capacity nuclear power and thermal power plants during the period of low electricity use. Vertical hydraulic tunnels are being constructed that pump electricity into reservoirs and produce electricity by discharging water downward during times of high electricity consumption.

In recent years, the construction of pole tunnels has been rapidly increasing in accordance with the expansion and modification of railway and road facilities. As a result, construction of work shafts and vertical holes for ventilation purposes has been gradually increasing for the purpose of shortening the construction period.

However, in order to construct these types of vertical spheres, various excavation equipment should be applied, but in Korea, the construction cost is increased due to the prolonged period of construction as it is designed and constructed in accordance with the old equipment rather than the newly developed mechanized equipment. It has a problem.

The present invention has been made to solve the above problems, the object of the present invention is to drill the advanced shaft of a small cross-section of small diameter, and to provide a method for expanding the vertical tunnel can be expanded to a large diameter vertical tunnel of ø7mm or more by using the expansion device It is.

In one preferred embodiment, the expansion method of the vertical tunnel according to the present invention is a vertical tunnel by a bottom-down excavation method after drilling the advanced shaft on the basis of a depth of 3m in the excavation once repeatedly by drilling, blasting, bagging, lining The winch is installed at the entrance of the platform, and a platform that is raised and lowered by the winch is installed.

The expansion device of the present invention is installed on a platform to perform excavation and baggage treatment of earth and sand.

Other objects and effects of the present invention will become apparent from the following detailed description, and the detailed description and examples showing the preferred embodiments of the present invention do not limit the scope of the present invention.

The present invention for achieving the above object, the drilling process for forming an advanced shaft by drilling in the ø2m-3m size by any one of the RBM method, RC method, Drill & Blast method for drilling vertically in the horizontal tunnel And a first expansion step of expanding the upper inlet of the advanced shaft to an area of ø7 m by manpower after the completion of the drilling step, and installing a machine room on the upper part of the first expanded shaft. It is composed of a blasting process of drilling and blasting the charged and unarmed medicine by the expansion expansion device under control, and a burping process that processes the blasted soil to the advanced shaft by the expansion device when the blasting process is completed. Is achieved.

In addition, the depth of the expansion blasting during the blasting process is characterized in that between 3m-4m.

In addition, after the charge hole and the armed holes are drilled by the expansion device, the expansion device is raised to the vicinity of the machine room, after blasting is characterized in that to perform the step of falling back again.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the accompanying drawings. First, like reference numerals designate functionally identical or similar parts throughout the drawings.

1 is a process diagram of a method for expanding a vertical tunnel according to the present invention, Figure 2a is a plan view of the machine room, Figure 2b is a working state diagram showing that the expansion using the expansion device according to the present invention.

1 to 2b, the expansion method of the vertical tunnel according to the present invention is drilled in the size of ø2m-3m by any one of the RBM method, RC method, Drill & Blast method for drilling vertically in the horizontal tunnel A drilling process for forming the advanced shaft 100, and a primary expansion process for expanding the upper inlet of the advanced shaft 100 to an area of ø7 m by manpower once the drilling process is completed; And a blasting process of installing the machine room 10 on the upper part of the advanced shaft 100, drilling and blasting the pier and the unarmed medicine by the expansion device 200 under the control of the machine room 10, and the blasting. When the process is completed, and the blasted soil is rubbed by the expansion device to the advanced process (100) a rubbing process.

First, briefly described with respect to the drilling process for drilling the advanced shaft 100 applied to the present invention, the drilling method for drilling the advanced shaft 100 is generally divided into a top-down drilling method and a bottom-up drilling method, in particular the present invention Top-down excavation method that can be applied to short step method such as drill & blast is a method that shortly excavates one step to 1.2mm-2.5m and immediately re-opens it. There is no need and a batch plant facility is needed.

  In the case of the bottom-up excavation method, the RC (Raise Climber) method is applied. Using the Alimak Raise Climber developed by ALIMAK, Sweden, it drills and blasts the pilot gang of approximately 3m cross-section upward. After the preliminary construction, the explosives are exploded downward and excavated.

In addition, RBM (Raise Boring Machine) method can be applied, which expands the small diameter guide hole up to 2.4mm-3m in diameter by rotating and crushing after downward drilling and additional blasting downward when the required cross-sectional area is large. In order to apply the excavation method to the advanced shaft 100 as described above, it is natural that the ease of carrying out the bag, water treatment, workability and economical construction period, safety, ground conditions, etc. must be considered in various ways.

Preferably, the RBM method among the advanced drilling method 100 that is commonly applied will be described as an example.

First, after drilling of underground ventilation station for drilling induction hole, install machine room at the bottom of vertical shaft, settle RBM, drill with small diameter (ø 311mm), continuously connect drill pipe and penetrate induction hole. , When the induction hole drilling is completed, remove the drill from the lower underground ventilation station and attach it with a reamer and pull it upward to expand.

At this time, the excavation principle is composed of the combination of the thrust and the rotational torque by the hydraulic and rock crushing is applied to the compression and rotational force of the cutter mounted on the reamer to cause the crack and crushing on the rock to complete the construction of the advanced shaft 100, Continuous casting of linings and intermediate bulkheads to concrete is by conventionally applied methods.

Subsequently, the expansion process of the advanced shaft 100 will be described with reference to FIG. 2.

First, before installing the machine room 10 on the upper part of the advanced shaft 100, a primary expansion process for expanding the advanced shaft 100 to an area of ø7m by manpower is performed, which is described later in the machine chamber 10 and It is for installing the dilation apparatus 200.

That is, the primary expansion process has a circumference and depth of ø7m in the form of a dig by manpower, and installs the machine room 10 by coupling the frame 12 to the upper part of the advanced expansion shaft 100 expanded in this way. do.

The machine room 10 serves to control the expansion device 200 to be described later to operate up and down and serves as a roof to protect the advanced shaft 100.

When the machine room 10 is installed as above and the expansion device 200 is introduced into the expansion shaft 300 which is first expanded, the blasting process is performed by puncturing the masonry and the unarmed medicine by the expansion device 200 and blasting. do.

The above-mentioned dilation apparatus 200 includes an upper platform 210 on which a plurality of winches 212 are mounted so as to operate the dilation apparatus 200 up and down, and located at a lower portion of the upper platform 210 in the advanced shaft. It includes a lower platform 220 that rotates 360 위하여 to drill the medicinal and armed medicinal and to handle the blast after blasting.

Preferably, the upper platform 210 is a structure having a radius of 6.5m, and a power plant 214 serving to control a bucket for a perforator or a bucket mounted on the lower platform 220 is installed, and a falling object. It protects the worker from

The plurality of winches 212 is installed in the above-described machine room 10 to evacuate the expansion device 200 at the time of blasting, and to supply the workers and various equipment to the upper, lower platform (210, 220) And operate the lift 216 described later.

The lower platform 220 is axially connected perpendicular to the upper platform 210, and secures a working space of a radius of 3.5 m, and there is a drill guide 230 for blasting and a bucket boom 240 for a bucket. It is installed.

The drill guide 230 is equipped with a drill machine 232 for drilling the drills and armed holes in the advanced shaft 100, the drill guide 230 can change the working position of the drill machine 232 It is composed of a plurality of joints so that it is characterized by operating by a hydraulic cylinder.

That is, the drill holes and the drill holes drilled by the drill machine 232 are arranged according to the planned blasting technique, preferably as shown in FIG.

In other words, the drilling plan drills a number of medicinal and armed medicinals along the scheduled excavation line to form an artificial fracture surface in the advanced gang 100. It is necessary to make a hole by drilling the line between the lines, and in particular, to make a certain inclination between the hole and the unloading hole for convenience of handling after blasting.

As shown in FIG. 4, when the blast preparation is completed as described above, the expansion device 200 is lifted upward by the winch 212, and the operator and various equipment are lifted or mounted on the lift 216 described above. , Blasting process is carried out. At this time, the depth of the blast blast is suitable between 3m-4m.

Subsequently, when the dust and the gas due to the blasting are removed, the expansion device 200 is lowered again as shown in FIG. 5.

The lowered dilation apparatus 200 is applied to the advanced gangster 100 by rubbing the rock and the like deformed by the earth and out to the outside.

The bucket process for performing such a bucketing process is achieved by the bucket boom 240 equipped with the bucket 242 installed in the expanding apparatus 200.

Bucket boom 240 is a hydraulic excavator applied free 360 ° rotation, the bucket 242 by raising the earth and sand is introduced into the advanced shaft 100 is taken out.

Then, by repeatedly performing the above blasting process and the bagging process to complete the expansion gang 300 to complete the desired vertical tunnel.

That is, as will be apparent from the foregoing description, the present invention can provide rapid expansion method for constructing a vertical tunnel using the expansion device 200, thereby achieving rapid construction and cost reduction in construction cost.

This invention can be implemented in other various forms, without deviating from the mind or main characteristic. For this reason, the above-described embodiments are merely examples in all respects and should not be interpreted limitedly. The scope of the present invention is shown by the scope of the claims, and is not limited by the specification text. Again, all variations and modifications belonging to the equivalent scope of the claims are within the scope of the present invention.

As described in detail above, according to the expansion method of the vertical tunnel using the expansion device according to the present invention, it is possible to drill the advanced shaft of a small cross-section with a small diameter, and to expand to a large diameter vertical tunnel of ø7 mm or more using a simple expansion device. It can save the cost, and can localize the expansion equipment that depended only on the import, so the construction reliability of the vertical tunnel is greatly improved.

Claims (3)

A drilling process for forming an advanced shaft by drilling to a size of ø2m-3m by any one of RBM, RC, and Drill & Blast methods for drilling vertically in a horizontal tunnel, and when the drilling process is completed, the advanced drilling The first expansion process for expanding the entrance of the upper part to ø7m by manpower, and the machinery room is installed on the upper part of the advanced expansion shaft, and the expansion device under the control of the machine room is used for the mechanic and the armed medicine. A blasting process for blasting and blasting by blasting, and a blasting process for blasting the blasted soil into the advanced shaft by the expansion device when the blasting process is completed. .  The method of claim 1, The expansion of the vertical tunnel using the expansion device, characterized in that the depth of the expansion blasting during the blasting process is between 3m-4m. The method of claim 1, After the expansion and arming holes are drilled by the expansion device, the expansion device is raised near the machine room, and after the blasting, the expansion device descends again to perform the rubbing process. .

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