An asymmetric support structure of entry driven along gob-side (EDG) under unstable roof in deep mines and construction method thereof. The asymmetric support structure includes roadway roof support structure, a gob-side support structure and a solid coal seam-side support structure. The roadway roof support structure includes a reinforcing wire mesh, a W-section steel strap, high-strength pretensioned bolts, and cable bolts and matching steel straps. The gob-side support structure includes a reinforcing wire mesh, a W-section steel strap, high-strength pretensioned yielding bolts and grouting cable bolts and its matching steel straps. The solid coal seam-side support structure includes a reinforcing wire mesh, a reinforced beam and steel strap pallet subassembly, high-strength pretensioned yielding bolts and cable bolts and its matching steel straps. The roadway roof support structure, gob-side support structure and solid coal seam-side support structure beneficially together form the asymmetric support structure.

The Helical segmental lining is an invention in tunneling industry wherein segments are designed in helical shape that are connected by interlocking system. The proposed helical tunnel lining method allows for segment erection and excavation to be completed concurrently and continuously by Tunnel Boring Machine (TBM) which will result in increasing the tunneling speed. The segments have tongue projection on the two trailing sides (circumferential and radial) and similar groove recess in the opposite two leading sides. This forms a tongue-and-groove joint at both circumferential and radial joints. The system allows for optional post-tensioning (PT) strand to be inserted into the leading circumferential side of the segments. The optional PT strand is fitted into a continuous groove located at the leading circumferential side of the segments. The system has solutions for the alignment curves and turning of the helical segmental lining, sealing of the system as well as terminating the strand and beginning another due to limitation of the strand length. The method is eliminating bolt connection between segments and increase tunnel advancement rate. The system allows for using typical (identical) segments.

The Helical segmental lining is an invention in tunneling industry wherein segments are designed in helical shape that are connected by interlocking system. The proposed helical tunnel lining method allows for segment erection and excavation to be completed concurrently and continuously by Tunnel Boring Machine (TBM) which will result in increasing the tunneling speed. The segments have tongue projection on the two trailing sides (circumferential and radial) and similar groove recess in the opposite two leading sides. This forms a tongue-and-groove joint at both circumferential and radial joints. The system allows for optional post-tensioning (PT) strand to be inserted into the leading circumferential side of the segments. The optional PT strand is fitted into a continuous groove located at the leading circumferential side of the segments. The system has solutions for the alignment curves and turning of the helical segmental lining, sealing of the system as well as terminating the strand and beginning another due to limitation of the strand length. The method is eliminating bolt connection between segments and increase tunnel advancement rate. The system allows for using typical (identical) segments.

An asymmetric support structure of entry driven along, gob-side (EDG) under unstable roof in deep mines and construction method thereof. The asymmetric support structure includes roadway roof support structure, a gob-side support structure and a solid coal seam-side support structure. The roadway roof support structure includes a reinforcing wire mesh, a W-section steel strap, high-strength pretensioned bolts, and cable bolts and matching steel straps. The gob-side support structure includes a reinforcing wire mesh, a W-section steel strap, high-strength pretensioned yielding bolts and grouting cable bolts and its matching steel straps. The solid coal seam-side support structure includes a reinforcing wire mesh, a reinforced beam and steel strap pallet subassembly, high-strength pretensioned yielding bolts and cable bolts and its matching steel straps. The roadway roof support structure, gob-side support structure and solid coal seam-side support structure beneficially together form the asymmetric support structure.

A segmental tube section structure having a length and a circumference, the segmental tube section structure including a plurality of tube segments extending the length in a longitudinal direction of the segmental tube section structure and extending in a circumferential direction of the segmental tube section structure, wherein each tube segment of the plurality of tube segments extends in the circumferential direction to span an equal arc of the circumference of the segmental tube section, and wherein each of the plurality of tube segments are connected to adjacent tube segments of the plurality of tube segments in the circumferential direction to form the segmental tube section structure.

A rock burst active prevention and control mechanism, which includes: a NPR reinforcing mesh, rod bodies, NPR steel panels, an embedding reinforcement and a NPR steel fibre concrete, the NPR reinforcing mesh is formed by horizontal and vertical interlacing of NPR steel bars, and is provided against a surrounding rock of a tunnel, extending ends of the rod bodies are penetrated out of a hole of the NPR reinforcing mesh, the NPR steel panels are provided with multiple through-holes, the rod bodies, which are located on a same radial plane in the tunnel, are connected to one of corresponding NPR steel panels, the embedding reinforcement is connected between the extending ends of two adjacent rod bodies, the NPR steel fibre concrete is overlaid on the extending ends of the rod bodies and the embedding reinforcement.

A feeding device for subway grille main reinforcement conveying includes two-layer chain plate conveyor arranged at an upper and a lower interval, and the chain plate conveyor is a climbing structure with one end high and one end low, two ends of the chain plate conveyor are fixedly connected to a support frame, and the chain plate conveyor is erected on a working plane through the support frame. The chain plate conveyor provides power through a motor reducer connected to a drive sprocket of the chain plate conveyor, and a higher end of the chain plate conveyor is provided with a position detection sensor. The position detection sensor can detect the position of the main reinforcement, and control the start and stop of the motor reducer and the grasping of the main reinforcement by a manipulator through feeding back the position of the main reinforcement to a main control system.

A feeding device for subway grille main reinforcement conveying includes two-layer chain plate conveyor arranged at an upper and a lower interval, and the chain plate conveyor is a climbing structure with one end high and one end low, two ends of the chain plate conveyor are fixedly connected to a support frame, and the chain plate conveyor is erected on a working plane through the support frame. The chain plate conveyor provides power through a motor reducer connected to a drive sprocket of the chain plate conveyor, and a higher end of the chain plate conveyor is provided with a position detection sensor. The position detection sensor can detect the position of the main reinforcement, and control the start and stop of the motor reducer and the grasping of the main reinforcement by a manipulator through feeding back the position of the main reinforcement to a main control system.

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.

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.