BOPI 04 BR/2024 REPERTOIRE NUMERIQUE 40 (57) A rock bolt (1) comprising a wedge-based expansion mechanism. The expansion mechanism comprises drive wedge (8) acting to expand an intermediate wedge (9) upon tensioning of the rock bolt (1), wherein the intermediate wedge (9) acts to expand a wedge means attached to an outer tube (4) of the rock bolt (1). The use of the intermediate wedge (9) enables greater expansion of the rock bolt (1). To be published with Fig. 2b ________________________________________ (11) 21524 Consulter le mémoire (51) A23K 20/163 (2018.01); A23K 20/24 (2018.01); A23K 50/90 (2018.01); A23L 29/256 (2018.01) (21) 1202400014 - PCT/FR2022/051384 (22) 08/07/2022 (30) FR n° FR2107607 du 13/07/2021 (54) Method for preparing a gel block. (72) SARTON DU JONCHAY, Thibault (FR) (73) YNSECT, 1 Rue Pierre Fontaine, 91058 EVRY-COURCOURONNES Cedex (FR) (74) S.C.P. AKKUM AKKUM & Associates, No. 1777, Rue 6.261, Auditorium Jean Paul II, Quartier Mbankolo B.P. 4966, YAOUNDE (CM). (57) The present invention relates to a method for preparing a gel block comprising the following steps: - providing an alginate and calcium carbonate preparation (SI), - providing a buffer solution (S2), - mixing (E4) the alginate and calcium carbonate preparation (SI) with the buffer solution (S2) using a mixing tee comprising an outlet duct, and subsequently, - gelling said mixture in a gelator formed by the outlet duct, and/or a duct connected to the outlet duct, to form a gel block. Fig. 1
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