USRE12923E - Fgxkk t - Google Patents

Description

.- P. T. 'BYERS; METHOD OI REMOVING LOOSE MATERIALS, DUST, ARI) GASES PROM MINES.

APPLIOATIOI FILED D30. 24, 1908.

Reissued Feb. 23, 1909.

MFA I 0a twat i STATES. PATENT OFFICE,

rams T. BYEBs, oF MoUirr PENNSYLVANIA.

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icnaeaa Specification of Rois-nod Letters Patent. lei-sued 191x38, 1909.

i nun-i Io. macs, ma September :9, 1008, Serial Io. 44:317. Application 1: at; fled December 24, mos.

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" whim it may concern: .Be it known that I, FRANK T. Brass, a citimen of the United States, residing at Mount Pleasant, in the county of Westmoreland and State of Pennsylvama, have inventedi eertain new and useful Im rovements in at aterials, Dust,

, audGasesfrom Mines, of which the following is I} specification.

jfly invention relates to mine ventilation, particularly to a method of removing 1 loose materials, dust and gases, and other from the separate compartments,

jects of my invention are to avoid and reduce the number of accidcl'lts to miners employed in operating the of such miles andto prevent the accumulation of exgases and com ounds. The d r explosions has en very greatly m- I in coal-mines by the introduction of for the cutting of the coal, and

o gunpowder and other blastin compounds used in throwing down the coa from the face of the rooms or passages. The cutachine causes lar e quantities of fine H ust, an when a su clent amount has accumulated a dange ex losive mixrousl tare-results. It has been Foun that recent exfiosionsare due largely to this cause.

carnedout, and for the clearly describing my met of removing dust and reference is made to the accom anying drawings, in whichre 1 illustrates a horizontal section threugh'the headings and rooms ofa mind,

one arr ment for carryin out my' invention; and igs. 2 and 3 are etail views of the entrance to a heading, showing form of a door by which the heading may be bealed.

The exhaust pump 1, together with its on e or other motor 2, may be conveniently cated in a room 3 excavated .f'ofljhis at the bottom of shaft 4 and be trance is obtained into the mine throu h the main he 5. The branch hea 6 and 7 lead to I, e various rooms 8 cut into the face of the coal vein, the coal being removed from the ends of these rooms in which the cutting machinery is located. Fans or blowers are operated at the entrances of the several headings for the purpose of sup lying fresh air and'ventilating the rooms, hut it has been found that it is impossible to remove the dust and uses which accumulate in the inner ends 0 the rooms and this accumulation results in the explosive mixtures which endanger the lives of the miners as well as the property of the A s stem of piping is led from the main shaft aving the mam i or conduits 10 suspended from the roo o the headings with branch pipes 12 leading therefrom into the several rooms and into proximity to the face of the coal where the cutting machinery is in operation. A branch main 13 leads from the main 10 into the settling chamber 15, from which the exhaust pipe 16 leads to the pump 1.

At the entrance to the headers and at intermediate points if desirable, there are placed sliding doors 20 by means of which the may be closed and sealed airtight. Similar (lioors 21 also ioutiirol the assages 22an 23 eadmg' intot e ustset 'ng and collecting chamber 15.

The thorough cl of the mine and the removal of practically of the dust, sees, and impurities is preferably accomp had at night, as must be done when the mine is not in operation. For this urpose the door 20*at the entrance to the mam headi is closed, thus sealing theentrance airt i gfiit, the other doors remaining open in their lowered position. The valve 25 is closed, shutting voff the main 10 from the outside atmosphere. The exhaust ump is set in operation and withdraws t e air and gases from the passages of the mine until the atmospheric pressure has been very much reduced, say to five pounds or square inch, as shown by the pressure in cator 27. As the air pressure is reduced, becoming lighter in' weight, the gases will be drawn out of the crevices falls, and old workings and places where there is no circulation of air and will mix with the light air now in the mine and be drawn out therewith throu the exhaust channels by the operation of 0 pump. The 1 10 e l lu'tmnd' A dust end dirt maybe order tl t the M "w nterim t through them- 4; of wen Mmmtemb 43 which extends around the sides, top I 1 03mm of the The door may be by means of com mm w h o ratlon of the oor shall 7t K the track whioh the mine, a pit or being bl bal I? h ti l snitay an weigtsan uloya or otherwise so theta may be was loweged into the Max-Poised htqrigqmwnp mao me :mmm ak y b er that l other 1m hrities WhlOh .medeswzm wnu i mthodmb may b mocked mm the v 1 M 01; mm

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ucg' airata her ressure into the z the vicinity o the inner rooms and y the mine, thereby crea strong drafts from the rooms into the headlihgi, and causing the dust and gases to pass hto exhaust channels 3. The method of removing dust and from mines, which consists in sealing mine, withdrawing the air and gases an tmosp eric pressure therein, fitroducing air at a higher pressure than .llid reduced pressure at a plurality of points within the mine, thereby causing stro drafts to traverse and drive out the dust an 5 3 from the passages of the mine into exust channels. 4. The method of removing dust and from mines, which consists in reducing e atmospheric pressure within-the mine,

20 introducing air at a higher pressure into the mine in the vicinity of the mner ends of the rooms or pass es of the mine, thereby causing strong rafts from the rooms into ting the headings, and causing the dust and gases to pass into dust settling and collecting chambers.

5. The method of withdrawing loose materials from the roofs and walls of mines, which consists in sealing the mine and exhausting a ortion of the air and gases, thus reducing t e atmospheric pressure therein, thereby drawing the occluded gases and loose materials from the roof, walls, and crevices in the mine, the dust and finer particles being carried out with the exhaust.

In testimony whereof I aflix my signature in presence of two witnesses.

v FRANK T. BYERS. Witnesses:

DAVID C. Bums, EDGAR M. BYERS.

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