32results about How to "Increase support speed" patented technology

The invention discloses a combined steel temporary supporting excavation method for a tunnel with an extra-large section. The combined steel temporary supporting excavation method comprises the following steps of: firstly excavating and supporting left and right upper pilot tunnels; secondly excavating and supporting left and right middle pilot tunnels, and left and right lower pilot tunnels, and excavating a pilot tunnel on the left lower part of the tunnel section; thirdly, setting temporary mid-partition supports and temporary steel supports for all parts; and finally, dismounting the temporary combined upright post steel supports of the left upper pilot tunnel and the right upper pilot tunnel, and pouring the second liner reinforced concrete, excavating core soil and carrying out inverted arch construction to the middle part of the tunnel. The combined steel temporary supporting excavation method uses a combined steel support to replace a temporary excavation method of the core soil, solves the technical difficulties that the excavation period is long, the construction quality cannot be ensured, the construction is difficult, and the like, and also solves the technical problems of ensuring the quick construction for the super-large section and the construction quality. A steel truss is used to replace the construction for the upper core soil, so that not only the construction safety of the tunnel can be improved, but also the tunnel excavation and the support speed can be quickened.

The invention discloses a construction method of a flexible anchor rod, which is suitable for the field of coal mine roadway support engineering. First construct a stepped bolt hole in the rock mass; push the flexible bolt body against the anchoring agent into the bottom of the bolt stepped hole, rotate the fixed torque nut to drive the flexible bolt body and the anti-twist self-aligning ball head to rotate and advance together, Until the flanging of the limiting cylinder fits closely to the excavation surface, the bolter stops rotating and waits for the anchoring agent to solidify; it drives the fixed torque nut to rotate and destroys the fixed torque structure of the fixed torque nut, so that the fixed torque nut continues to rotate along the connecting sleeve Insert and compress the anti-friction washer, anti-twist self-aligning ball head, and tray, so that the stop column on the tray is stuck to the excavation surface to prevent the tray from rotating. Effectively prevent the rotation of the anti-twist self-aligning ball head. The anti-twist self-aligning ball head restricts the rotation of the connecting sleeve through the protrusion II and then restricts the rotation of the flexible anchor body, so that the flexible anchor body does not occur when the bolter applies pre-tightening force. turn. Its construction speed is fast and its support efficiency is high.

The invention relates to an underground rescue device for coal mines, in particular to an underground fast complete support equipment. The complete set of fast underground support equipment has a variety of combined support functions, which greatly speeds up the rescue speed, reduces the workload of the rescuers, and improves the rescue efficiency; The roadway is reinforced and supported; the complete set of support equipment has a certain degree of unity, and all components such as the complete set of hydraulic portable props, extension rods and ends are universally compatible and can be combined arbitrarily; Rescue requirements; all adjustable devices of the whole set of equipment use the acceleration valve technology, that is, the piston retracts faster before encountering resistance, and the work efficiency is increased by about 35%; the complete set of support equipment is used in conjunction with each other to increase the support speed , increasing the safety factor.