JP3141610U - Work environment improvement device in tunnel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a work environment improving device in a tunnel capable of quickly sedating dust scattering at low cost.
An electric intake fan 12 is attached to a rear end portion of a wind tube 11, and a spray nozzle 13 in which a plurality of spray holes are formed in a narrow tube is straddled across an air outlet 11a of the wind tube 11 across the central portion of the wind port. It is installed in the vertical direction, and it is suspended from the position near the face to the tunnel ceiling across the wellhead. A truck 17 equipped with a water supply pump 14, a pulse sterilizer 15, and a power supply 16 is arranged below the wind pipe 11, and the spray nozzle 13 and the water supply pump 14 are connected by a pressure-resistant water supply hose 18. Water is supplied from a water source such as a river, pond, and water tank outside the tunnel through a water supply pipe 19, sterilized by a pulse sterilizer 15, and then sent out by a water supply pump 14.
[Selection] Figure 1

Description

  The present invention relates to an apparatus for improving the working environment by calming and ventilating dust at the time of slipping work in tunnel blasting work.

  Conventional dust blasting techniques for tunnel blasting are disclosed in Patent Documents 1 and 2. In the technique of Patent Document 1, an extendable wind pipe equipped with an exhaust fan is mounted on a movable carriage, and the number of the wind pipes arranged according to the length of the tunnel is connected to the front and back of each wind pipe. It is characterized in that the exhaust fan is operated to suck dust from the blasting from the front wind pipe and remove it from the rear wind pipe.

  In the technique of Patent Document 2, a telescopic wind pipe equipped with an intake fan that sucks outside air is installed in the tunnel, a dust collector is arranged near the face, and the air intake fan is operated to direct the outside air to the face. It is characterized by being able to purify the air in the mine by blowing air and collecting dust from the blasting with a dust collector.

By the way, each of the above-described techniques needs to suck almost all the air in the mine in order to remove dust, and there is a problem that it takes time to remove the dust. In particular, since fine fine dust floats in the air and is difficult to remove, there is a problem that ventilation tends to be insufficient. In addition, the former technique requires a number of trucks corresponding to the length of the tunnel, and the latter technique also uses an expensive dust collector.
JP 2004-68374 A JP 2003-314200 A

  The problem to be solved by the present invention is to provide a working environment improvement device in a tunnel which can solve these conventional problems and can quickly and quickly settle dust scattering at low cost.

The configuration of the present invention that solves this problem is as follows.
1) A long wind pipe is hung on the ceiling in the tunnel from the position near the face to the wellhead, and an intake fan that sucks outside air is attached to the rear end of the wind pipe to form a plurality of spray holes in the narrow pipe A working environment improvement device in a tunnel provided with a water supply means for supplying water to the spray nozzle, with the spray nozzle attached so as to straddle the opening of the wind tube, and the water supply means applies a high voltage pulse to the water In the apparatus for improving the working environment in the tunnel described in 1) above, the apparatus is equipped with a pulse sterilizing device for sterilizing.

  In the present invention, when the intake fan is operated at the time of slippage and sprayed toward the face by the spray nozzle, fine mist is sprayed on the face by the wind of the intake fan, and the fine mist captures the dust and calms down. The air is pushed out of the mine and ventilated. Therefore, compared with the prior art, the dust is calmed and ventilated in a short time without waiting for total ventilation, and a clean and comfortable work space is obtained. Moreover, the structure of the spray nozzle is simple and can be implemented at low cost.

  In the present invention, when equipped with a pulse sterilization device that sterilizes by applying high voltage pulses to the water supplied to the spray nozzle, bacteria such as Escherichia coli can be sterilized to create a work environment that takes into account the health of workers, This is effective when water is supplied from a water source such as a pond. Embodiments of the present invention will be specifically described below with reference to the drawings.

  FIG. 1 is an explanatory view of a working environment improvement apparatus of the embodiment, FIG. 2 is an explanatory view of a spray nozzle of the embodiment, FIG. 3 is an explanatory view showing a use state of the working environment improvement apparatus of the embodiment, and FIG. It is a graph which shows the change of the amount of dust by spraying. In the figure, 10 is a work environment improvement device, 11 is an air pipe, 11a is a blowout port, 12 is an intake fan, 13 is a spray nozzle, 14 is a water supply pump, 15 is a pulse sterilizer, 16 is a power source, 17 is a truck, 18 Is a water supply hose, 18a is a valve, 19 is a water supply pipe, 20 is a tunnel, 21 is a face, and W is a fine fog.

  As shown in FIGS. 1 and 2, the working environment improving apparatus 10 of the present embodiment has an electric intake fan 12 (contra fan) attached to the rear end portion of the long wind tube 11, and a plurality of spray holes are formed in the narrow tube. The spray nozzle 13 is attached to the air outlet 11a of the wind tube 11 in the vertical direction so as to straddle the center of the opening, and as shown in FIG. (Not shown).

  Below the wind pipe 11, a water supply pump 14 having a nozzle water pressure of 8 MPa, a pulse sterilizer 15, and a truck 17 equipped with a power source 16 are arranged, and the spray nozzle 13 and the water supply pump 14 are connected by a pressure-resistant water supply hose 18. is doing. Water is supplied from a water source such as a river, pond or water tank outside the tunnel 20 through a water supply pipe 19, and a midway position thereof is connected to a water supply pump 14 by a water supply hose 18, and the supplied water is sterilized by a pulse sterilizer 15. It is made to send out with the water supply pump 14 later.

  In this embodiment, as shown in FIG. 3, when discharging the gap after blasting, the door of the wellhead not shown is opened and the intake fan 12 and the water supply pump 14 of the work environment improvement device 10 are operated and taken in through the wind pipe 11. The outside air is blown to the face 21 and sprayed to the face 21 by the spray nozzle 13, and the dust 20 floating in the fine mist W is captured and removed so as to be pushed out of the mine by the force of the air blow. Ventilate the interior.

  In the tunnel 20 at this time, the amount of dust immediately after slipping out and about 30 minutes after that was measured at several locations. As shown in FIG. 4 (a), in the case of no spraying (only air blowing), not only the reference value is greatly exceeded, but also the amount of dust is increased about 30 minutes later than immediately after slipping, and ventilation is not good. Enough and time consuming. As shown in FIG. 4 (b), when the spray amount was maximized during slippage and the spray amount was reduced to about half after slipping, it slightly exceeded the reference value immediately after slipping, but after that the reference value was exceeded. It was far below, and the effect of dust suppression by spraying of this example was recognized.

  The technology of the present invention is useful for tunnel blasting work.

It is explanatory drawing of the working environment improvement apparatus of an Example. It is explanatory drawing of the spray nozzle of an Example. It is explanatory drawing which shows the use condition of the working environment improvement apparatus of an Example. It is a graph which shows the change of the dust amount by spraying of an Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Work environment improvement apparatus 11 Wind pipe 11a Outlet 12 Intake fan 13 Spray nozzle 14 Water supply pump 15 Pulse sterilizer 16 Power supply 17 Truck 18 Water supply hose 18a Valve 19 Water supply pipe 20 Tunnel 21 Face W Fine fog

Claims (2)

  A long wind pipe suspended from the position near the face of the tunnel over the tunnel head, and an air intake fan that sucks outside air is attached to the rear end of the wind pipe, and the spray tube has multiple spray holes A working environment improvement device in a tunnel, in which a nozzle is attached to a blower outlet of a wind pipe so as to straddle the opening, and water supply means for supplying water to the spray nozzle is provided.   The working environment improvement device in a tunnel according to claim 1, wherein the water supply means includes a pulse sterilization device that sterilizes water by applying a high voltage pulse.

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