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.

The invention relates to a protective element (20) for connecting to a concrete element (10) of a tunnel lining, to the concrete element (10) and to the method for producing the concrete element (10). It is an object of the invention to provide a protective element (20) for a tunnel lining, or the associated concrete element, which ensures that the protective casing of the tunnel lining is better safeguarded against corrosive gases or liquids. The solution of the invention provides that the protective element (20) is produced from an injection-moldable plastics material, that a protective portion (21, 22, 23) is connected in a single piece to a seal (30), wherein the connection is gas-tight and liquid-tight, that the protective portion (21, 22, 23) is connected in a single piece to a connecting element (24, 25, 26, 27, 28), and that the single-piece connection is produced by injection molding of the plastics material.

The invention relates to a protective element (20) for connecting to a concrete element (10) of a tunnel lining, to the concrete element (10) and to the method for producing the concrete element (10). It is an object of the invention to provide a protective element (20) for a tunnel lining, or the associated concrete element, which ensures that the protective casing of the tunnel lining is better safeguarded against corrosive gases or liquids. The solution of the invention provides that the protective element (20) is produced from an injection-moldable plastics material, that a protective portion (21, 22, 23) is connected in a single piece to a seal (30), wherein the connection is gas-tight and liquid-tight, that the protective portion (21, 22, 23) is connected in a single piece to a connecting element (24, 25, 26, 27, 28), and that the single-piece connection is produced by injection molding of the plastics material.

A screen handling system is provided for a rock drilling device including a feed assembly, at least one rail system supporting the feed assembly for translational movement relative to a boom along a first axis, and an actuator for advancing a bit or bolt into a rock face parallel to the first axis. The screen handling system includes a pad disposed proximate the bit or bolt, a block having a bore that defines a second axis parallel to the first axis, a gripper at least partially disposed within and axially moveable relative to the bore in a direction along the second axis, and a drive mechanism coupled to the block that is capable of continuously rotating the pad about the second axis to a desired orientation.

A polymer mesh for skin control in hard rock mining conditions is provided. The polymer mesh is manufactured using a knitted or woven design that further includes one or more pairs of solid cut-resistant bands. The bands are positioned in pairs, each band in a pair having a width of at least about 2.5 and being generally parallel with the other band. The bands are spaced from one another at a distance of between about 1.5 and about 4 to create a reinforced aperture between the bands. One or more reinforcement bolts are installed within the aperture with the bands on opposing sides of each bolt buffering the edges of the steel plates associated with the bolts to prevent the plates from tearing the polymer mesh.

The present disclosure provides a device and a method for real-time monitoring the movement trajectory of mine roof strata, which relates to the technical field of the movement monitoring of mine roof strata. The device described in the present disclosure has fewer components, and the assembly process is simple and fast during use. It can be assembled and used according to the actual length of the monitoring borehole; the structure of the device is relatively simple, easy to manufacture, uses fewer precision instruments, and has a lower cost; by using the device of the present disclosure for real-time monitoring of mine roof strata, the movement trajectory of mine roof strata can be monitored in real-time, accurately, and continuously, providing more detailed strata information for disaster prevention and control such as mine pressure, strata control, and rock burst.

The present disclosure provides a device and a method for real-time monitoring the movement trajectory of mine roof strata, which relates to the technical field of the movement monitoring of mine roof strata. The device described in the present disclosure has fewer components, and the assembly process is simple and fast during use. It can be assembled and used according to the actual length of the monitoring borehole; the structure of the device is relatively simple, easy to manufacture, uses fewer precision instruments, and has a lower cost; by using the device of the present disclosure for real-time monitoring of mine roof strata, the movement trajectory of mine roof strata can be monitored in real-time, accurately, and continuously, providing more detailed strata information for disaster prevention and control such as mine pressure, strata control, and rock burst.

A tunnel supporting force adjusting device, comprising a fixed component, a movable supporting component and a driving component, wherein the fixed component is connected with section steel; the movable supporting component is connected with the fixed component and used for connecting with a tunnel trunk, and the movable supporting component, the fixed component and the section steel are fixedly connected with the tunnel trunk by pouring; and the driving component is detachably connected with the fixed component and the movable supporting component respectively to adjust the supporting force of the movable supporting component on the tunnel trunk. The present invention also discloses a tunnel supporting force adjusting method, in which adjusting devices are arranged in different positions of the section steel of the arch section of a tunnel to achieve fixed-point adjustment of the force in each position so as to form optimum supporting force and supporting effect.