Abstract

The present invention describes a method for breaking solid material, said method comprising the steps of - inserting at least one expansion device 1, said expansion device 1 having the ability of exerting a breaking force when being pressurized, into at least one drilling hole; - filling at least one substance 2 into said drilling hole around said inserted expansion device 1, said substance having the ability of conveying the breaking force from said expansion device 1 when said expansion device 1 is being pressurized; and - pressurizing said expansion device 1.

IPC Classes  ?

• E21C 37/10 - Devices with expanding elastic casings

Abstract

According to the present invention there is disclosed an expansion device for breaking solid materials, wherein the expansion device according to the present invention comprises at least one hose elements, each hose element comprising an inner expansion chamber having a non-circular cross section before pressurization or having an inner pressuring means and/or a reinforcement arranged on the outside of the inner expansion chamber which have a non-circular cross section before pressurization; the inner pressuring means which is arranged around the inner expansion chamber; the reinforcement which is arranged around the inner pressuring means; optionally an outer layer arranged around the reinforcement; optionally at least one "directional-breaking-force amending" material portion which is arranged outside the reinforcement; and wherein the at least one hose element comprises a coupling connection on a first end of the hose element, and optionally a second coupling connection on a second end of the hose element.

IPC Classes  ?

• E21C 37/06 - Other methods or devices for dislodging with or without loading by making use of hydraulic or pneumatic pressure in a borehole
• E21C 37/10 - Devices with expanding elastic casings

Abstract

The present invention relates to methods for manufacturing expansion devices for breaking of solid material, whereby the expansion device is placed into predrilled holes in the solid material and expands with pressurisation. The methods of execution can differ, but the collective main function is to enable for significant radial expansion, with a reinforced hose element with a non-cylindrical expansion chamber as a point of departure. This is obtained with modifications in various stages of the manufacturing process, where the reinforced core is shaped into apt cross-sections before the hose construction is finally vulcanized, in cases where unvulcanized rubber is used.

IPC Classes  ?

• E21C 37/10 - Devices with expanding elastic casings
• F16L 11/08 - Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall