Devices for accumulating material within a limited space, such that at most insignificant amount of material leaves the device prior to the device being at full capacity. One embodiment comprises an expandable structure to be filled, comprising a material receiving member for receiving expansible material, such that the expansible material is inserted into the member and expands within the member prior to part of the material exiting the material receiving member into another member, wherein the expansible material expands and rigidizes within the material receiving member and within the another member to form a rigid structure having a required form.

A pumpable mine ventilation stopping wall structure comprised of a pumpable bag having spaced walls of generally parallel nonporous and flexible sheets with the sheets retained in spaced relationship with spaced flexible cross ties. The perimeter of the spaced walls may be closed off with a permeable mesh having a mesh size which will permit restricted flow of cementitious grout therethrough for sealing the wall structure to surrounding rough mine faces. The bag is provided with at least one grout fill port for filling the bag by pumping cementitious grout into the bag.

A pumpable mine ventilation stopping wall structure comprised of a pumpable bag having spaced walls of generally parallel nonporous and flexible sheets with the sheets retained in spaced relationship with spaced flexible cross ties. The perimeter of the spaced walls may be closed off with a permeable mesh having a mesh size which will permit restricted flow of cementitious grout therethrough for sealing the wall structure to surrounding rough mine faces. The bag is provided with at least one grout fill port for filling the bag by pumping cementitious grout into the bag.

A pumpable mine ventilation stopping wall structure comprised of a pumpable bag having spaced walls of generally parallel nonporous and flexible sheets with the sheets retained in spaced relationship with spaced flexible cross ties. The perimeter of the spaced walls may be closed off with a permeable mesh having a mesh size which will permit restricted flow of cementitious grout therethrough for sealing the wall structure to surrounding rough mine faces. The bag is provided with at least one grout fill port for filling the bag by pumping cementitious grout into the bag.

A system for preventing fluid from entering a walled structure includes a support structure configured for fixing to at least one surface of the walled structure; and a barrier apparatus attachable and anchorable to the support structure, the barrier apparatus including a fluid retention member configured for intercepting a fluid entering the walled structure, and a collar for holding the fluid retention member against an interior surface of the walled structure, proximate the opening. As fluid enters the barrier apparatus, the pressure increases against the interior surface of the fluid retention member, pressing it against the walled structure. The collar in combination with the fluid retention member to which it is attached acts like a gasket to tighten a seal between the barrier apparatus and the walled structure.

A system for preventing fluid from entering a walled structure includes a support structure configured for fixing to at least one surface of the walled structure; and a barrier apparatus attachable and anchorable to the support structure, the barrier apparatus including a fluid retention member configured for intercepting a fluid entering the walled structure, and a collar for holding the fluid retention member against an interior surface of the walled structure, proximate the opening. As fluid enters the barrier apparatus, the pressure increases against the interior surface of the fluid retention member, pressing it against the walled structure. The collar in combination with the fluid retention member to which it is attached acts like a gasket to tighten a seal between the barrier apparatus and the walled structure.

The present invention relates to collapsible hoses and inflatable structures such as pneumatic actuators for water control gates that are manufactured on and incorporate into their structure a flexible internal mandrel with rounded edges. One face of the mandrel and all of its rounded edges separate from the inflatable membrane during pressurization, while the remaining face of the flexible mandrel remains bonded to the remaining face of the inflatable envelope. Sharp internal edges (in the deflated condition) and their associated stress concentrations (in the inflated condition) are thus eliminated.

The present invention relates to collapsible hoses and inflatable structures such as pneumatic actuators for water control gates that are manufactured on and incorporate into their structure a flexible internal mandrel with rounded edges. One face of the mandrel and all of its rounded edges separate from the inflatable membrane during pressurization, while the remaining face of the flexible mandrel remains bonded to the remaining face of the inflatable envelope. Sharp internal edges (in the deflated condition) and their associated stress concentrations (in the inflated condition) are thus eliminated.

A tunnel seal including a body, inflatable from a folded position to an inflated position, multiple positioning straps coupled to the body, an inflow port fluidly connected to the body, a pressure relief valve fluidly connected to the body, and a hot stab receptacle fluidly connected to the inflow port.

A tunnel seal including a body, inflatable from a folded position to an inflated position, multiple positioning straps coupled to the body, an inflow port fluidly connected to the body, a pressure relief valve fluidly connected to the body, and a hot stab receptacle fluidly connected to the inflow port.