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.

A composite support system based on a steel-concrete (concrete-filled steel tube) support and a shotcrete arch includes an anchor mesh layer provided on an inner wall of a roadway. A flexible compressible layer is provided on the outer side of the anchor mesh layer; a support frame is erected on the outer side of the flexible compressible layer; reinforcement meshes are respectively arranged on an inner side and an outer side of the support frame; the support frame and the reinforcement meshes form a framework to construct an arch spray layer; the reinforcement meshes and the support frame are embedded into an arch structure to form a rigid layer; the flexible compressible layer is provided between the rigid layer and the anchor spray layer. When the flexible compressible layer is compressed, the flexible compressible layer is deformed toward a reserved deformation space for a yielding purpose.

The present disclosure discloses a multi-functional intelligent tunneling apparatus and method for simulating partial excavation of tunnel. The apparatus comprises an operating platform, a multi-functional rotary tunneling system, a precision power propulsion system, an information acquiring and processing system, a digital display control box and a slurry pumping device, wherein, the multi-functional rotary tunneling system includes a plurality of independent operating channels, and can realize multi-functional simulation of a tunnel construction process, including drilling, slurry injecting, and partial excavation under real-time monitoring; under the control of the digital display control box, the precision power propulsion system can realize the fine control of the multi-functional rotary tunneling system by means of hydraulic monitoring and preset advance distance. The present disclosure can simulate partial excavation steps of tunnel well, ranging from drilling, slurry injecting, different partial excavation methods, supporting and data postprocessing and analyzing of test. The operating and testing method are easy, and with high reliability and high degree of automation and intelligence.

The present disclosure discloses a multi-functional intelligent tunneling apparatus and method for simulating partial excavation of tunnel. The apparatus comprises an operating platform, a multi-functional rotary tunneling system, a precision power propulsion system, an information acquiring and processing system, a digital display control box and a slurry pumping device, wherein, the multi-functional rotary tunneling system includes a plurality of independent operating channels, and can realize multi-functional simulation of a tunnel construction process, including drilling, slurry injecting, and partial excavation under real-time monitoring; under the control of the digital display control box, the precision power propulsion system can realize the fine control of the multi-functional rotary tunneling system by means of hydraulic monitoring and preset advance distance. The present disclosure can simulate partial excavation steps of tunnel well, ranging from drilling, slurry injecting, different partial excavation methods, supporting and data postprocessing and analyzing of test. The operating and testing method are easy, and with high reliability and high degree of automation and intelligence.

A composite support system based on a steel-concrete (concrete-filled steel tube) support and a shotcrete arch includes an anchor mesh layer provided on an inner wall of a roadway. A flexible compressible layer is provided on the outer side of the anchor mesh layer; a support frame is erected on the outer side of the flexible compressible layer; reinforcement meshes are respectively arranged on an inner side and an outer side of the support frame; the support frame and the reinforcement meshes form a framework to construct an arch spray layer; the reinforcement meshes and the support frame are embedded into an arch structure to form a rigid layer; the flexible compressible layer is provided between the rigid layer and the anchor spray layer. When the flexible compressible layer is compressed, the flexible compressible layer is deformed toward a reserved deformation space for a yielding purpose.

A method of treating tunnel collapse includes leveling a collapse body and moving a pavilion support under the collapse cavity, lifting a shield plate until a lower edge of the shield plate surpasses a contour line of an initial supporting arch of a tunnel, connecting a bottom column and inserting a padding plate under a column. If the hydraulic prop retracts, the column, the bottom column, the padding plate and the hydraulic prop bear a load from the shield plate. Mounting and connecting the initial supporting arch, welding the intersection point of the column and the initial supporting arch, cutting off the column in the initial supporting arch. Transferring the load of the shield plate from the pavilion support to an initial supporting shed, spraying fast-setting concrete to a grid arch to form a closed shell, and pumping filling material to fill the space of the collapse cavity.

A polymer sheet adapted to attach to a material body such as a ceiling of a geological cavity and provide protective cover. The sheet comprises: a webbing portion defining a plurality of primary openings; and two margin portions extending along opposite edges of the sheet on either side of the webbing portion along a length of the sheet, each margin portion defining a plurality of secondary openings, wherein the margin portions are angled relative to the webbing portion.

A polymer sheet adapted to attach to a material body such as a ceiling of a geological cavity and provide protective cover. The sheet comprises: a webbing portion defining a plurality of primary openings; and two margin portions extending along opposite edges of the sheet on either side of the webbing portion along a length of the sheet, each margin portion defining a plurality of secondary openings, wherein the margin portions are angled relative to the webbing portion.

A mesh handler for a mining machine includes a generally U-shaped frame arranged for receiving and positioning at least one mesh against a roof portion of an underground tunnel. The frame includes at least one generally U-shaped rail and a guide mechanism arranged for guiding the mesh along the rail in a direction substantially perpendicular to a longitudinal direction of the mining machine. Moreover, a mining machine including the mesh handler is provided.

A method for producing a tube segment and a tube for an evacuated tube transport system and a method for producing the tube segment.