FR2516162A1 - METHOD FOR PROTECTING STAFF WORKING IN A DUSTY ATMOSPHERE - Google Patents

Abstract

1. A method for the protection of personnel working in the dusty atmosphere of headings of underground roadways characterized in that two protective curtains of non-dusty air are produced between the dusty road head and the rear of the heading where the personnel are, these curtains of air being situated in a plane perpendicular to the longitudinal axis of the roadway, the curtains being obtained by delivering filtered air through two slots (26) in an enclosure (25) of a filtered air delivery device disposed at the rear of a dusty air suction device.

Description

The present invention relates to a method of protecting the persons

  working in a dusty atmosphere.

  The main purpose is to maintain a healthy process at the part of the underground worksites in which the personnel works. The digging of underground galleries, in particular digging

  mines or tunnels is made using special machines

  peeled digging machines advancing in the galleries e-i entail-

  These machines generally consist of a rotating head equipped at its end with sharp elements which penetrate

the rocks.

  The felling of rocks, in particular that carried out in the

  Mining is accompanied by voluminous

  The search for better technical and economical results in the digging of underground tunnels leads to the use of increasingly efficient machines, which at the same time produce larger and larger quantities of harmful dust, To protect the working staff in the mining sites, dust removal processes are carried out, which most often consist in sucking the stale air on the side of the face of the face, in purifying it

  then in devices with scouring materials, then at-re

  treading the purified air behind the face of the waist Unfortunately, such methods do not make it possible to purify the environment of the

  staff working on the mine sites.

  To improve the purification of dusty air it is known to put-and work processes according to which fresh air is pulsed from the back of the mining site towards the front of the mining company: in this case we observe turbulence in addition to those created by the hacking head and prevent a good suction of the unpurified air Therefore, much of this unpurified air will pollute the rest of the site We have now found a process which solves these problems and in particular a method for providing protection

  effective staff working in the mine sites.

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-2-

  The present invention relates to a method of protecting the persons

  working in the dusty atmosphere of underground tunneling sites, characterized by the fact that two dust-free protective air curtains are created between the dusty front and the back of the site where the staff are located, these curtains of air being located in a plane perpendicular to the longitudinal axis of

the gallery.

  The method of the present application is implemented by creating two non-dusty air curtains of protection. The creation of more than

  two air curtains is possible but does not bring any signifi-

  nificant; the formation of a single air curtain is insufficient to obtain effective protection of personnel According to the invention the two air curtains can be obtained by using in particular the purified air discharge device described in the dust collector which makes the subject of a patent application filed on the same day by the applicant and which is entitled: dust collector apparatus According to this application, the purified air discharge device consists of an enclosure having the shape of a rectangular parallelepiped provided on each lower and upper face of two straight slots located in

  two planes perpendicular to the axis of the dust collector.

  The attached figure provides a better understanding of the process of the present invention. It is a top view with partial section. It illustrates a preferred embodiment of the invention according to which the air delivery device cited above is used. in the application filed the same day by the applicant and which relates to a dust collector apparatus: the parallelepipedal enclosure 25 is provided with slots 26 arranged on each lower and upper face in a plane perpendicular to the longitudinal axis of the gallery When the dust collector is in operation the purified air enters through the channels 22 and 23 to exit in the form of blades 27, 28, 29 and 30 thus creating

  curtains of separation of the face of the waist and the back of the building site.

  The method of the present application is particularly advantageous because it allows to isolate and effectively protect personnel from dusty areas of underground workings Implementation is performed using special devices that can be integrated later

  in more complex equipment such as dust collectors.

2516162

Claims (1)

  Method of protecting personnel working in the atmosphere   dusty atmosphere of underground tunneling sites characterized in that two non-dusty protective air curtains are created between the dusty face and the rear of the site where the personnel are located, these air curtains being located in   a plane perpendicular to the longitudinal axis of the gallery.