A method of installing a fill fence system at a predetermined location to at least partially cover an opening defined by a back, a floor, and side walls. The method includes providing a carrier system including a carrier assembly, locating the carrier assembly in a safe zone adjacent to the unsafe zone, and positioning an assembled fill fence assembly on the carrier assembly. The carrier assembly and the full fence assembly are moved to a preselected location. With the carrier assembly at the preselected location, the fill fence assembly is positioned at the predetermined location, and installed at least partially to cover the opening. The carrier assembly is disengaged from the fill fence assembly and removed from the preselected location. The fill fence system includes a securing element is applied to help secure the fill fence assembly in the opening.

A method of installing a fill fence system at a predetermined location to at least partially cover an opening defined by a back, a floor, and side walls. The method includes providing a carrier system including a carrier assembly, locating the carrier assembly in a safe zone adjacent to the unsafe zone, and positioning an assembled fill fence assembly on the carrier assembly. The carrier assembly and the full fence assembly are moved to a preselected location. With the carrier assembly at the preselected location, the fill fence assembly is positioned at the predetermined location, and installed at least partially to cover the opening. The carrier assembly is disengaged from the fill fence assembly and removed from the preselected location. The fill fence system includes a securing element is applied to help secure the fill fence assembly in the opening.

A method for removing a hydraulic support for solid filling coal mining includes digging a support removing channel (3) in a coal body (2) in front of the hydraulic support (1), and laying a support removing track (4), then removing the hydraulic support from a coal conveying gateway (11) to a track gateway (5), temporary supporting is carried out by matching a single supporting column with a n-type steel beam before each hydraulic support is removed. A supporting roof is reinforced in time by means of erecting a crib (13) and grouting after each hydraulic support is removed, three grouting pipelines (12) are laid after the supports of the whole work surface are removed, and grouting is carried out in the whole finishing cut space. The roof of the support removing space of the work surface is stable so that the hydraulic supports on the work surface of solid filling coal mining are ensured to be safely and efficiently removed.

A method for removing a hydraulic support for solid filling coal mining includes digging a support removing channel (3) in a coal body (2) in front of the hydraulic support (1), and laying a support removing track (4), then removing the hydraulic support from a coal conveying gateway (11) to a track gateway (5), temporary supporting is carried out by matching a single supporting column with a n-type steel beam before each hydraulic support is removed. A supporting roof is reinforced in time by means of erecting a crib (13) and grouting after each hydraulic support is removed, three grouting pipelines (12) are laid after the supports of the whole work surface are removed, and grouting is carried out in the whole finishing cut space. The roof of the support removing space of the work surface is stable so that the hydraulic supports on the work surface of solid filling coal mining are ensured to be safely and efficiently removed.

Provided are a storable box-shaped casting and curing device for a filler and a casting and curing method for a filler. The casting and curing device includes multiple L-shaped frames which are detachably connected, a positioning frame assembly and multiple storage boxes. Each frame includes two splice plates perpendicular to each other, is symmetrically provided with multiple casting gates along longitudinal and horizontal center lines thereof, and is provided with two through grooves up and down along the longitudinal center line thereof. Every two frames may be spliced into a mold which is square and has a cavity where a filler can be cast. Connectors are arranged at top corners of each mold to change a height of the device. Free ends of the positioning frame assembly are clamped into first through grooves. Multiple storage boxes are uniformly arranged in the mold.

Provided are a storable box-shaped casting and curing device for a filler and a casting and curing method for a filler. The casting and curing device includes multiple L-shaped frames which are detachably connected, a positioning frame assembly and multiple storage boxes. Each frame includes two splice plates perpendicular to each other, is symmetrically provided with multiple casting gates along longitudinal and horizontal center lines thereof, and is provided with two through grooves up and down along the longitudinal center line thereof. Every two frames may be spliced into a mold which is square and has a cavity where a filler can be cast. Connectors are arranged at top corners of each mold to change a height of the device. Free ends of the positioning frame assembly are clamped into first through grooves. Multiple storage boxes are uniformly arranged in the mold.

A method for forming a passage in stope backfill material includes steps of: a) providing an expandable void forming apparatus at a lower level relative to an unexcavated stope; b) expanding the void forming apparatus, such that a substantially liquid-impermeable seal is formed between the void forming apparatus and the unexcavated stope; c) pouring backfill material into a void formed by the excavation of a stope adjacent to the unexcavated stope, and allowing the backfill material to at least partially cure such that the void forming apparatus forms a passage between the unexcavated stope and the backfill material; and d) contracting the void forming apparatus and removing the void forming apparatus from the passage.

A method for forming a passage in stope backfill material includes steps of: a) providing an expandable void forming apparatus at a lower level relative to an unexcavated stope; b) expanding the void forming apparatus, such that a substantially liquid-impermeable seal is formed between the void forming apparatus and the unexcavated stope; c) pouring backfill material into a void formed by the excavation of a stope adjacent to the unexcavated stope, and allowing the backfill material to at least partially cure such that the void forming apparatus forms a passage between the unexcavated stope and the backfill material; and d) contracting the void forming apparatus and removing the void forming apparatus from the passage.