Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F42—AMMUNITION; BLASTING
  • F42D—BLASTING
  • F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
  • F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
  • F42D1/20—Tamping cartridges, i.e. cartridges containing tamping material

Definitions

• the invention relates to a system for bracing an explosive charge in a borehole, which has a casing which accommodates the explosive cartridges forming a charging column, a hose body which fills the space between the coated charging column and the borehole wall, which holds a water filling and is closed at one end, and a filling device device for the tube body, the tube body being made of at least stretchable material and equipped in the direction of the mouth of the borehole with an extension extending beyond the charging column.
• a method for blasting in which the explosive cartridges forming a charging station are arranged in a tubular, closed casing and are inserted into a borehole therewith.
• the shell containing the explosive cartridges is arranged within a part of a hose filled with water, so that the charging station itself
• REPLACEMENT LEAF 2 - has no contact with the water.
• the space between the covered charging column and the borehole wall is filled by means of the outer hose filled with water, at least over the entire length of the charging column.
• a hose made of elastic material is used.
• the outer hose is extended in the direction of the mouth of the borehole beyond the charging station, so that it can simultaneously act as water.
• the explosive is not only separated from the water, son ⁇ countries it is also proper condemnation of the explosive charge within 'instead of the borehole by those on all sides surrounding water.
• This known method has proven itself per se, but the introduction of the encased charging station and the hose body filled with water has proven to be comparatively complex since these are parts which are separate from one another.
• DE-PS 32 07 121 proposes a charging system for introducing an explosive charge into a borehole, which has a casing which accommodates the explosive cartridges forming the charging station and a casing which holds a water filling has a hose body closed at one end.
• the sheath receiving the charging station is attached to the hose body receiving the water filling, the sheath extending essentially over the length of the hose body, which is equipped with a valve closure.
• the envelope is closed at its front end and open at its rear end.
• the sheath and the tube body are made of at least stretchable material.
• the loading system further comprises a combined loading and filling stick, in which there is a filling pipe, the front end of which projects outwards on the loading stick and is assigned to the valve closure of the hose body, while the front end of the loading stick can be placed on the loading column .
• a combined loading and filling stick in which there is a filling pipe, the front end of which projects outwards on the loading stick and is assigned to the valve closure of the hose body, while the front end of the loading stick can be placed on the loading column .
• the invention is based on the task of creating a system for bracing an explosive charge in a borehole of the type mentioned at the outset, which avoids introducing the above-mentioned disadvantages and which involves introducing the charging column with a tubular body and filling the Hose body and thus the tensioning of the charging station in a comparatively short time.
• the lengthening of the hose body is dimensioned such that its free end is outside the borehole when the hose body is located deepest in the borehole.
• This configuration of the system makes it possible to use a conventional ramrod to load the encased charging station together with the hose body into the deepest part of a drilling
• REPLACEMENT LEAF Spray gun or the like used. to be attached to the free end of the extension in order to fill the hose body from outside the borehole and thereby tighten the encased charging column, which is sealed watertight against the hose body. In this way, the time required for introducing an encased charging station with hose body and for filling the hose body is reduced to a very considerable extent.
• the extension of the hose body advantageously has a reduced cross section compared to the hose body, which serves to save material.
• the free end of the extension of the hose body is closable.
• the free end of the extension of the tube body can be closed by means of a valve, a lip valve, a knot or the like. respectively.
• the extension of the hose body has at least one section with an enlarged cross section.
• the section with an enlarged cross section also occupies a larger space than the extension, so that
• a section with an enlarged cross section is advantageously located in the region of the mouth of the borehole.
• Conventional spray guns which are connected to the pressurized water supply can be used as the filling device. In this way it is possible to fill several tubular bodies arranged in adjacent boreholes at the same time, or it is also possible to carry out a method in which one person pushes the encased charging stations with tubular bodies into a borehole using a ramrod ⁇ the and then a second of the filling process is carried out by means of a spray gun.
• the filling device can be connected to the water supply via a reducing valve, so that there is considerable water saving compared to the known method of operation.
• connection fittings used for filling the hose body with water are designed as plug-in fittings, so that these system parts can be coupled and uncoupled easily and quickly.
• the sleeve accommodating the charging station is attached to the tube body, the same width foil sections being connected to one another at their longitudinal edges, for example by welding, gluing or the like.
• the film section forming the envelope which serves to receive the charging station, has a greater width than the film sections forming the tubular body, but this runs flush with those of the tubular body along the longitudinal edge. This results in a pocket-like shell, which considerably simplifies the insertion of the explosive cartridges, regardless of whether they are inserted individually into the pocket-like shell or already combined to form a charging station.
• a means for controlling dust and / or nitrous gases is added to the water filling of the hose body, so that the dust which has already been achieved by the proper dam is reduced.
• FIG. 1 shows a sectional side view of a borehole with the charging station located deepest in the borehole and the tubular body located
• FIG. 2 shows a plan view of the tubular body
• FIG. 3 shows a sectional side view of the same according to line II-II of FIG. 2.
• the sleeve 3 is formed by a film section 4, which is attached to the tube body 5, which consists of the two film sections 6.
• the film sections 4, 6 lie on one another with their longitudinal edges and are flush with one another, the longitudinal edges being welded, glued or the like. are connected to each other.
• the sheath 3 extends essentially over the length of the hose body 5, this forming an attached pocket into which the explosive cartridges 1 can be inserted individually or already combined as a charging station.
• the film section 4 forming the sleeve 3 has a greater width than the film sections 6 forming the tube body 5, the longitudinal edges, however, being flush with one another, with the result that, due to the greater width of the film section 4, a pocket-like Extended recording is available, which significantly simplifies and facilitates the insertion of the explosive cartridge 1.
• At least the hose body 5 is made of stretchable or elastic material in order to achieve the desired expansion for damaging the charging station 2 when it is filled.
• the encased loading column 2 with the hose body 5 is located in the deepest of the borehole 7.
• the insertion is carried out with the aid of a conventional loading stick.
• the hose body 5 is provided with a
• REPLACEMENT LEAF Extension 8 equipped, the length of which is dimensioned such that its free end 9 is located outside the borehole 7 when the tubular body 5 is located deepest in the borehole. At the free end 9, the extension 8 of the tube body 5 is closed, for example with a lip valve 10.
• the extension 8 has a substantially smaller cross-section than the hose body 5, so that material savings are achieved. However, it is also possible to lead the tube body 5 out of the mouth of the borehole with an unchanged cross section.
• the extension 8 of the hose body 5 can be provided with a section 11 which has a considerably larger cross-section than the extension 8, for example that of the actual hose body 5 Section 11 a corresponding expansion, so that additional bracing in the borehole 7 is achieved.
• This effect can be further increased by several such sections 11, in particular one in the area of the mouth of the borehole, so that a chamber-like bracing and partitioning of the borehole is effected.
• the explosive cartridges 1 are inserted individually or already combined into a column in the pocket-like, expanded and formed casing 3. Then the encased charging station 2 with the tubular body 5 is pushed into the deepest hole of the borehole by means of a conventional ramrod. After reaching the intended location, a spray gun or the like. attached to the free end 9 of the extension 8 hanging out of the borehole 7, whereupon the hose body 5 and possibly the section (s) 11 are filled by actuating the spray gun. At the free end 9 there is, for example, a lip valve 10 which closes automatically after filling the hose body 5, including any sections 11 present, so that the spray gun is removed and placed on the free end 9 of the extension 8 of the hose body 9 in a next borehole 7 can.
• a lip valve 10 which closes automatically after filling the hose body 5, including any sections 11 present, so that the spray gun is removed and placed on the free end 9 of the extension 8 of the hose body 9 in a next borehole 7 can.
• the explosive cartridges 1 are separated from the filling of the hose body 5 in the casing 3, so that it is ensured that they cannot come into contact with water.

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• Life Sciences & Earth Sciences (AREA)
• General Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Earth Drilling (AREA)
• Drilling And Exploitation, And Mining Machines And Methods (AREA)

Applications Claiming Priority (2)

Publications (1)

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ID=42260311

Family Applications (1)

Country Status (3)

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• 1988
  • 1988-04-30 DE DE3814746A patent/DE3814746A1/de active Granted
• 1989
  • 1989-07-27 EP EP89908420A patent/EP0436548A1/de not_active Withdrawn
  • 1989-07-27 WO PCT/EP1989/000886 patent/WO1991002212A1/de not_active Application Discontinuation

Non-Patent Citations (1)

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