EP 0145540 A2 19850619 - Method of cutting a solid compact material.
Title (en)
Method of cutting a solid compact material.
Title (de)
Verfahren zum Schneiden eines soliden kompakten Materials.
Title (fr)
Procédé de découpage d'une matière solide compacte.
Publication
Application
Priority
FR 8318060 A 19831107
Abstract (en)
1. A process for creating a substantially plane cut in a mass or compact solid material such as a rock block or mass, this process including the drilling, in the plane of the cut which it is desired to create, of at least two holes (101, 110), the sealing (3, 6) of these holes, and the placing under pressure of a fluid contained in their sealed parts, characterised in that these holes (101, 110) are disposed in such a manner that each hole, in a first zone of the plane, is situated at a distance from another hole less than about five times its diameter, or intersects the other hole, and is situated at a greater spacing from this other hole in a second zone of the plane, and that each of two holes (101, 110) is sealed (6) at least between the first zone or the plane and the free extremity or extremities of the said hole or at the level of these (3), in that a first pressure value P1 is determined which is capable of causing the appearance in the said first zone, but not in the second zone, of a fissure (2) into which some of the said fluid is forced, and a second pressure value P2 capable of resulting in the guidance, into the second zone, of a fissure having appeared in the first zone, and in that the pressure is raised simultaneously in both holes, at least in the first zone, to the value P1 and in that the pressure is maintained in the holes, at least in a part of the second zone, at the value P2 until the cut extends as far as desired.
Abstract (fr)
La présente invention est relative au découpage de masses solides, et notamment à l'extraction et à l'équarrissage de roches. Le but de l'invention est de fournir un procédé avantageux et économique pour découper la masse sensiblement suivant un plan choisi à l'avance. Pour celà on fore plusieurs trous (107 à 110) tous dans le plan choisi, et on fait progresser dans ce plan une fissure initiale (2), créée en un point où deux trous se trouvent très proches, par injection de fluide sous pression dans cette fissure, les trous étant tous maintenus sous pression sur une longueur suffisante pour servir de guidage à la propagation de la fissure, qui reste ainsi dans le plan choisi.
IPC 1-7
IPC 8 full level
B28D 1/00 (2006.01); B28D 1/32 (2006.01); E21C 37/12 (2006.01); E21B 43/26 (2006.01)
CPC (source: EP)
B28D 1/00 (2013.01); B28D 1/32 (2013.01); E21C 37/12 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0145540 A2 19850619; EP 0145540 A3 19850710; EP 0145540 B1 19880203; AT E32367 T1 19880215; DE 145540 T1 19851205; DE 3469202 D1 19880310; ES 537474 A0 19860101; ES 8603773 A1 19860101; FR 2554384 A1 19850510; FR 2554384 B1 19870403; NO 163642 B 19900319; NO 163642 C 19900627; NO 844416 L 19850508; PT 79468 A 19841201; PT 79468 B 19860805
DOCDB simple family (application)
EP 84402210 A 19841105; AT 84402210 T 19841105; DE 3469202 T 19841105; DE 84402210 T 19841105; ES 537474 A 19841107; FR 8318060 A 19831107; NO 844416 A 19841106; PT 7946884 A 19841107