DE2345913C3 - Two-chamber cartridge for solidifying rock or coal - Google Patents

Description

Each hole was closed with a plug. The seam wall impregnated in this way proved to be sufficiently consolidated for a smooth dismantling.

Example 2

A cartridge A of 300 mm length and 43 mm diameter contains an inner cartridge of the same Length and 31 mm in diameter, in which there is a diisocyanate component is located. The remaining outer cartridge contains the Folyol component. The walls of the inner and outer cartridges consist of a polyethylene film with a wall thickness of 0.05 mm.

If the cartridge B is the same, the walls of the outer cartridge differ from cartridge A made of polyethylene film and the wall of the inner cartridge made of polyamide / polyethylene composite film a total thickness of 0.1 mm.

Storable. Cartridge A shows signs of solidification after 3 months; Cartridge B was after ίο 3 months still completely unchanged.

Claims (3)

c: - the two-chamber patron ", as a diisocyanate com-patent claims: KaSer ^ d0 ^ 'with 1. ZweUcammerpaJone »^ ₅ ^ OS ^ e ^ fi ^ e
Rock or coal contains 5 % of ^{water by embedding poly- 5 4} _{™ \ owie03} ^ s.
ureman * omponenten in Locher cue ui ds Ge ™ g £ ^ "nylmethane diisocyanate has a stem or the coal are drilled, characterized by υαι> Lnyuauy j ear! that the cartridge in the high flash point of over 200 C and ba 20 ° C In the first chamber, diphenylmethane diisocyanate contains a vapor pressure of only 10 * Torr Seme, while the second chamber has a damaging effect _{that is} significantly less than the polycomponent with an OH number of 200 to the commonly used toluene diisocyanate, 400 and 10 to 20% of an elasticizing agent. In addition, this isocyanate can contain up to 30% by weight of other diisocyanates without any disadvantage, as well as 0.3 to 50% water 2. Two-chamber cartridge according to claim 1, mixed therewith. This can also be Tn and characterized in that the diphenylmethane i5 tetra and higher polyhydric cyanates of diphenyl diisocyanate trade with up to 30 percent by weight of methane. other polyisocyanates is mixed. Polyol components are also used as polyol components 3. Two-chamber cartridge according to claim 1, da- bmdungen and their mixtures in question, the one characterized in that at least the separating OH number have from 200 to 400, e.g. B. that wall between the chambers of a water, ethylene and / or butylene glycol or ester of Vapor-proof film is made up of polyhydroxy compounds, formed from Adipm and Ethylene glycol upd / or glycerine The following elasticizing agents can be used: phatic hydrocarbons, e.g. B. mineral oil, high- a5 mineral oil extracts containing aromatic compounds, free fatty acids, Tall oil distillates, liquid hard coal distillates distillation, such as coal tar oil and ester plasticizers, ζ. B. phosphates or phthalates. Castor oil is particularly suitable. The aforementioned com- It is known. Coal and rock by introducing 3 ° ponenten also have the advantage that they are after Rec of foaming synthetic resins in pre-drilled their mixing do not foam immediately. This Holes of at least about 1 meter depth can be expanded by adding 0.3 to solidify, whereby the synthetic resin leads to the polyol very well only after its 1–5% by weight of water foams, gel in the area around the respective gel. The beginning of foaming is understandable-borehole penetrates and by curing to a 35 licherweise depending on the in the mountains or in Solidification of the borehole area leads. The art of the coal temperatures. About the Resin can enter the water component at relatively high pressures, and the foaming time can be achieved without Drill holes are pressed in and penetrates, as it takes 2 to 12, preferably 3 to 9 minutes, is generally very thin, already partly set in. not in the foamed state in the borehole 40 for the two-chamber cartridges according to the invention surrounding crevices and cracks. there is a risk that the water composition mentioned According to a preferred embodiment, this component through the separating chamber wall in the di-solidification process the synthetic resin is diffused over in the form of isocyanate and urea is introduced into the boreholes by 7 ares of formation of a two-chamber cartridge. leads through a forwarded rod, e.g. B. a 45. According to a preferred embodiment of the Er wooden rod, is destroyed in the borehole. This connection therefore consists of at least one partition between the two variants, which is particularly suitable for providing the chambers with a water vapor seal for strengthening coal. Material, e.g. B. of polyvinylidene chloride or einjr The two-chamber cartridge generally consists of a composite film. This is known from a cartridge with a larger diameter, which is in 50 foil material, z. B. made of polyethylene, coated with interior in addition to a polyol, a second cartridge with polyamide. Of course, the inner gill diameter can also be larger, in which there is a polywall of the two-chamber pair of a water isocyanate. The walls of these cartridges are made of vapor-proof film,
are usually made of a foil material. ". . . . It has now been shown that this can be achieved by foaming 55 B e 1 s ρ 1 e I l Polyurethane formed with a certain physical in one FJözwsnd BMt tends to leak Requirements should be met by the fat charcoal of 20 m * to be more evenly priced Dusocyanates are not met. IS reported boreholes with a depth of 2.50 m owns z. B. the well-known toluene diisocyanate drilled a diameter of 30 mm. In each A cartridge that has a relatively low flash point and a 60 borehole is inserted correspondingly high vapor pressure. Since this di- length of 300 m and a diameter of 22 m isocyanate is very harmful to health, hai owns. The inner chamber of the cartridge contains the the above-mentioned method in practice polyisocyanate component and in the outer chamber not yet widely implemented. the polyol component. In each borehole there is one It has now been found that the disadvantages can be incorporated into the cartridge The harmfulness of the toluene diisocyanate and further destruction of the cartridge and det and in addition to foamed masses VernüV ^ ung their ingredients per 30 sec. With that have a useful elasticity, rotated in 500 U, uim Thereupon all