DE1062195B - Device for quantitative sampling of minerals and rocks in the production of blasting holes and other boreholes - Google Patents

Description

GERMAN

INTERNAT. KL. £ 21c

PATENT OFFICE

REGISTRATION DAY:

A 23984 VI / 5b

DECEMBER 19, 1955

NOTICE
THE REGISTRATION
AND ISSUE OF THE
EDITORIAL: JULY 30, 1959

The invention relates to a device for quantitative sampling of minerals and rocks in the production of blasting holes and other boreholes with hydraulic fluid flushing for the cuttings.

In such drilling devices, the fluid flush is designed so that the borehole through a central channel in the drill rod is supplied with water and this as it flows past the Outside of the drill rod promotes the drilling dust in the direction of the borehole opening.

This method has already been proposed to drill holes (see Swedish magazine »Teknisk Tidskrift«, 1953, issue 12, special edition »Inventering genom borrning av fyndigheter for dagbrytning «by Carl-Olof Mo r feld), the drilling dust quantitatively retrieve from the borehole by means of a device that extracts the drill rod from one there is concentrically surrounding tube, on its outside a device for sealing the Has pipe wall against the borehole mouth; a vessel also belongs to this device an overflow outlet for collecting the drilling fluid containing the drilling dust flowing out of the pipe and a separator for separating the drilling dust from the overflow outlet outflowing rinsing liquid by gravity separation. By the aforementioned sealing device it ensures that all drilling dust at the bottom of the borehole is covered by the flushing fluid Pressure is conveyed to the borehole opening and on the way to the collecting vessel through the pipe in the Gap between the inside of the pipe and the outside of the drill rod flows. The collecting vessel used, to which the above-mentioned pipe was firmly connected, had a side door through which it it was partly possible and partly necessary to remove or scrape off drilling dust and rinsing fluid quantitatively, when the drilling dust should be collected quantitatively. The wall of the collection vessel possessed furthermore a row of holes arranged vertically one above the other, which served as an overflow outlet; However there was a lack of specially designed means for the quantitative extraction of those flowing out of those holes Mud fluid, although efforts were made to collect this fluid and its drilling dust content separated by gravity separation in a vessel.

The sampling device described above had certain deficiencies in that it was a complete one Obtaining all of the drilling dust belonging to a certain borehole length was and was difficult It took effort and time.

A device for sampling rock drilling is also known (see USA patent device

for quantitative sampling

of minerals and rocks

in the manufacture of explosive

and other boreholes

Applicant:
Aktiebolaget Separator, Stockholm

Representative: E. Kipp and Dipl.-Ing. Ms. Baumbach,
Patentanwälte, Hamburg 1, Glockengießerwall 2-4

Claimed priority:
Sweden December 20, 1954

Dipl.-Ing. Nils Edvin Svensjö, Bromma,

Dr. phil. Henrik Hagerman Gate, Stockholm,

and Carl-Olof Oskar Morfeldt, Lidingö (Sweden),

have been named as inventors

writing 1559 709), in which the borehole mixes is fed with water into a sack, from which the water drips off and is collected in buckets. There With this water a not insignificant part of the drilling dust flows off, is a with this device Complete collection of the drilling dust and thus quantitative sampling impossible.

Another already known device (see "Bergbautechnik", 1954, p. 453) works with air as a means of conveyance for the drilling dust and is therefore only in dry rock, so only in exceptional cases can be used, because when working in the rocks, which are usually wet inside, the drilling dust agglomerates and then cannot be conveyed by air; in addition, the filter bag provided there is for the fine fractions of the drilling dust permeable, so that the drilling dust is not collected in its entirety and thus an even approximately reliable quantitative analysis is excluded, especially since When drilling, certain minerals produce a particularly fine dust, which is all the more easily removed from the The filter bag is blown out and is lost.

The invention aims at overcoming these difficulties, the whole, from a certain one Drilling length of the borehole originating drilling dust quickly and effectively by causing little effort

909 579/4

To gain measures so that the composition of the pierced rock in one Laboratory, for example, can be analyzed and examined half a meter. The received Investigation results naturally represent mean values of the borehole lengths in question represent.

The invention is based on such a system with hydraulic fluid flushing working device for quantitative sampling, in which one against the borehole mouth sealed outlet for the rinsing liquid and a vessel provided with an overflow for Collection of the drilling fluid containing the drilling cuttings is provided and the drilling cuttings by gravity separation is deposited. According to the invention, the desired results with such Formation of the aforementioned device achieved, which is essentially characterized in that the The outlet sealed against the borehole mouth opens into a funnel vessel, the outlet of which is downward is directed and opens into the collecting vessel provided with outlets, and that below the outlets another funnel is provided, the outlet of which is also directed downwards and with the inlet a dewatering centrifuge with a removable drum is in connection.

The operation of the device according to the invention is based on the idea that after the Drilling through the rock layer to be examined, the supply of the flowing to the sampling device Rinsing liquid and drilling occasionally interrupts or, without interrupting it, merely drains the rinsing liquid from the sampling device, shuts down the centrifugal dehydrator, the collecting vessel removes from the sampling device, the drum with the accumulated therein Removes drilling dust from the centrifugal dehydrator and the collecting vessel, for example one easily portable bucket, together with the one conveniently placed in this vessel or bucket Drum, sent to the laboratory to examine the drilling dust. In practice it is useful to use a number of matching shaped collection vessels and drums so that each a new vessel and drum can be inserted while the others are out for examination of the drilling dust are in the laboratory. This makes it possible after an interruption just to replace the parts concerned immediately take a sample over a new borehole length to continue.

The drilling fluid flowing from the borehole mouth into the funnel vessel has the tendency in which Funnel jar to splash; to prevent this and also to allow the liquid to flow in one direction To deflect outlet, you can in the funnel vessel a flushing liquid plate, for example in the form a rubber shield with a hole for inserting the drill rod.

Despite this spray protection device, the inflowing rinsing liquid has a tendency to especially when drilling in the horizontal or in a more or less upward direction, continue along the drill rod and out of the funnel housing, whereby some of the drilling dust would be lost. In order to avoid this, compressed air nozzles can be arranged in the funnel vessel be that the air jets emerging from them the continuous flow of .Spüliquid along the drill rod blow away. In order not to use the funnel underneath this vessel when removing the collecting vessel The funnel can have to be placed on the floor, which can cause certain difficulties be suspended on the funnel vessel, adjustable in height, so that the collecting vessel - as above mentioned - can consist of a bucket, can easily be removed from the funnel without doing this the funnel-shaped bottom outlet of the funnel vessel to be obstructed.

ίο The rinsing liquid flowing into the collecting vessel creates strong eddies in the contents of the vessel. These currents act a calm settling in the Vessel against; therefore, according to a further feature of the invention, the vessel is in its upper part provided with a removable insert of approximately radially extending wings, which the mentioned Effectively dampen eddy currents.

A device for sampling according to the invention which can be used with horizontally extending bores is explained in more detail below using an exemplary embodiment that in the drawing in

Fig. 1 in vertical section through the upper part of the device and in

FIG. 2 in a perpendicular section at right angles to FIG. 1 through the underlying removable part of the facility is illustrated while

Fig. 3 shows a side view of the entire device on a smaller scale.

In Fig. 1, the joint is denoted by 1 and the borehole by 2. The outer part 3 of the borehole has a larger diameter than the rest of the borehole and serves to accommodate the tube 4 of the sampling device.

The outer wall of the pipe is resilient against the inner wall of the borehole, for example made of rubber expansion ring 5 sealed. A socket 6 concentrically surrounds the pipe and is screwed onto this so that it is moved towards the ring 5 and away from it can be, wherein it is movable by means of a lever 8 mounted in holes 7 in it. When moving the bush 6 in the direction of the ring 5 transmits a tube 4 concentrically surrounding it Tube 9 the contact pressure of the socket on the ring, so that it is compressed in the longitudinal direction of the tubes is, whereby it spreads in the radial direction and thus seals against the inside of the hole 3. Two intermediate disks 10 are also used to transmit pressure. One screwed onto the tube 4 Ring 11, together with a washer 12, absorbs the contact pressure and holds the ring 5 in its position. A rubber shield 14 with a hole 13 for inserting the drill rod is used to deflect the from the tube 4 in the housing 15 flowing flushing liquid downward in the direction of the funnel-shaped Bottom outlet 16 of the housing. The shield 14 is fixed to the housing by a rod 17 held. Two legs 18, one of which is shown in Figure 1, support the housing 15. The support legs are designed to be extendable and provided with a screw 19 for locking in the correct length. Such supports are z. B. known in rock drilling machines with dust prevention device (s. German Patent 451 588). So that flushing liquid from the rubber shield 14 does not run along the drill rod flows, air jets coming from compressed air nozzles 20 prevent the rinsing liquid from flowing further into this direction. The nozzles are directed so that they

blow in the direction of the indicated lines 21 against the drill rod. Four compressed air nozzles can expediently be used be provided, the uniformly on one shown in the drawing only in cross section Annular tube 22 are distributed. The compressed air is fed to the nozzles 20 via a connection piece 23. In the the side wall of the housing 15 facing away from the borehole is one for guiding and mounting the through it Inserted boring bar serving bushing 24 is provided. There is a pair at the top of the case Support pin 25 for a funnel located below the housing, which is held by a pair of rods each of which has an eyelet 26 for the associated pin 25 at its upper end. In Fig. 1 only one pin and one eyelet are shown.

Fig. 2 shows the funnel 27 provided with a cylindrical neck 28, which by means of rods 29 on Housing 15 can be suspended. In order to be able to lift the funnel 27 easily, the rods 29 have handles 30. In the funnel 27 is a bucket 31, for example by three evenly along the funnel circumference distributed supports 32 held. This results in drainage slots for the rinsing liquid between the bottom of the bucket and the inside wall of the funnel. The bucket can have a capacity of preferably have 15 l. The funnel carries at its lower end a drain pipe 33, which is used for connection is intended for a centrifugal dehydrator. For example, there are twenty-four on the top of the bucket Holes 34 arranged in a horizontal ring, which expediently have a diameter of 2 to 3 mm to have. These holes form the overflow outlet of the collection vessel, i.e. H. of the bucket. At a deeper one In place, the bucket has a pair of holes about 8 mm in diameter, which can be closed by rubber stoppers 35 and through which the liquid in the bucket above them is drained before the Bucket is removed from the sampling device.

In the upper part of the bucket there is a preferably one-piece and different one Purposeful use. It consists of a funnel-shaped part 36, which is formed by the funnel-shaped Bottom outlet 16 of the housing 15 catches the rinsing liquid flowing down. At its bottom goes the part 36 into a cylindrical outlet pipe 37 over. A cylindrical one extends from the upper edge of the funnel 36 Baffle 38 downwards, which jets the liquid jets coming from the holes 34 downwards in the direction steers to the funnel 27. Wings 39, preferably four in number, extend radially from the outlet pipe 37 and from the lower part of the funnel 36 and are firmly connected to these parts. This evenly around the circumference of the outlet pipe 37 distributed wings, which the eddy currents in the bucket located Should soften the liquid, protrude up to the inner wall of the bucket; the outer edges of the wings have the same slope as the bucket wall. In this way, the bucket 31 carries the entire insert 36 to 39 in that the wing outer edges rest on the inclined inner wall of the bucket. It can therefore be used easily be lifted up and out of the bucket when it is to be sent to the laboratory. The handle of the bucket, which is shown placed down, is denoted by 40.

In the overall view of Fig. 3, a pair of pins 41 is shown, on which the funnel 27 by means of the rods 29 can be hung in an optional lower position when the bucket 31 is out of the Sampling device is to be removed.

The actual drilling machine, which is provided with supports 43, is denoted by 42. The supply of rinsing liquid takes place in a known manner through the flushing head 44, with which the drill rod 45 in the drill is used. The flexible hose used to supply rinsing liquid is denoted by 46.

The hopper 27 is of such construction through a flexible pipe 47 with a dewatering centrifuge 48 connected, in which the mud is in the drum

ίο accumulates, in turn, easily from the sling can be lifted out. The ones in the sling from the mud, d. H. the drilling dust, separated liquid leaves it through an outlet 49. The dehydrator is driven by an electric motor 50 driven, which is formed in one piece with the sling and by an adjustable feet 52 standing base plate 51 is arranged. The base plate 51 is also provided with handles 53 which, if necessary, can be easily lifted and carried along with the sling.

The mode of operation of the sampling device, which at

can be seen from the description above, but will be briefly summarized below.

The flushing fluid emerges from the hollow drill rod 45 at the end of the borehole 2 and flows under Drilling dust is taken back to the mouth of the borehole. As a result of the seal between the Outer wall of the tube 4 and the inner wall of the hole 3, the flushing liquid is forced through the Pipe 4 to flow in the annular gap between the inner wall of the pipe and the outside of the drill rod, and enters the housing 15. The liquid flows further down through the funnel-shaped parts 16 and 36 in the bucket 31, in which the main part of the drilling dust settles, while a smaller part of the Drilling dust with the liquid on its way through the holes 34 and down into the funnel 27 past the bottom of the bucket and through the flexible hose 47 into the slingshot 48, in whose drum the centrifuged drilling dust is collected.

After the rock under investigation is drilled through, either the drilling and the supply of Rinsing liquid interrupted or only diverted the rinsing liquid into a suitable drainage pipe while the sludge collecting vessel and the centrifuge drum after removing the rubber stoppers 35 and Shutting down and releasing the centrifuge can be removed from the funnel 27. The rods 29 are of the Pin 25 removed and hung on pin 41. The insert 36 to 39 is lifted out of the bucket 31, which is then removed from the funnel 27. The drum is removed from the centrifuge and brought to the laboratory together with the bucket. Another bucket and one other drums are put into place in the facility, which is then used for new sampling ready.

Claims (5)

Patent claims: 1. Equipment for quantitative sampling of minerals and rocks during manufacture of blasting holes and other boreholes with hydraulic fluid flushing for the cuttings an outlet sealed against the borehole mouth for the drilling fluid and one with an overflow vessel for collecting the drilling fluid containing the drilling cuttings as well as for separating the cuttings through Gravity separation, characterized in that the outlet (4) sealed against the borehole mouth (3) opens into a funnel vessel (15, 16), the outlet of which is directed downwards and into the collecting vessel (31) provided with outlets (34) opens, and that a further funnel (27) is provided below the outlets, the outlet of which is also directed downwards and with the inlet (47) of a dewatering centrifuge (48) with removable Drum is in communication. 2. Device according to claim 1, characterized in that the funnel vessel (15,16) has a having a drilling fluid baffle plate (14) provided with a hole (13) for the drill rod. 3. Device according to claim 1 or 2, characterized by compressed air nozzles (20) for advancing blowing the flushing fluid adhering to the drill rod, wherein the exit direction of the nozzles runs in the longitudinal extension of the drill rod. 4. Device according to claim 1, characterized in that the further funnel (27) on Funnel vessel (15,16) is suspended adjustable in height. 5. Device according to claim 1, characterized in that the collecting vessel (31) in his Upper part has a removable insert with radially extending wings (39). Considered publications:
German Patent No. 451 588;
U.S. Patent No. 1,559,709;
"Bergbautechnik" magazine, 1954, p. 453. 1 sheet of drawings ι 909 579/4 7. 59