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

The invention relates to a rotary impact type pneumatic roofbolter. The roofbolter is a drilling tool in a coal mine roadway bolt supporting work. Currently, in the coal mine roadway bolt supporting work, the most common roofbolter is the rotary type pneumatic roofbolter; the current rotary type pneumatic roofbolter only can support a roadway with a hardness f of less than 10 because of uncertainty of the coal mine roadway environment. In order to support the roadway with the hardness f of more than 10, a pneumatic impact structure is integrated into the current rotary type pneumatic roofbolter; and the new rotary impact type pneumatic roofbolter not only can support the tougher roadway, but also can increase a support speed.

The invention relates to mine exploration equipment and provides a crawler-type thin seam anchor rod drill rig. The crawler-type thin seam anchor rod drill rig comprises a workbench and a crawler-typetravelling mechanism base disc, wherein the base disc is connected with the workbench by an arranged lifting mechanism, the base disc enters a middle part of one side of a thin seam and is sunken toform a counter groove, a fixed lug seat is arranged in the counter groove and is used for being hinged with the lifting mechanism, one end of the lifting mechanism is hinged with the fixed lug seat, the other end of the lifting mechanism is hinged with the workbench and is pushed by a hydraulic mechanism in the lifting mechanism so as to ascend and descend in a rotation way, the lifting mechanismis sunk into the counter groove when descending to the lowest part so that the height of the drill rig is 1.1-1.5 meters. By the crawler-type thin seam anchor rod drill rig, the problems of mine resource exploration of the thin seam and application of mine resource in coal mine transportation of a vertical shaft are solved, and the mine resource exploration efficiency and safety of the thin seam is improved.

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 relates to an advanced support device of a coal mine fully mechanized mining working surface lane, in particular to a self-circulation type advanced hydraulic support. The self-circulation type advanced hydraulic support consists of a walking part, a frame part and a plurality of support parts, wherein, the frame part is arranged on the walking part and can be telescopic and supportthe support parts for walking, and a plurality of support parts are supported in the lane; when the self-circulation type advanced hydraulic support needs to be moved forward, the manual handling is unnecessary, only the support parts need to be contracted for being supported on the frame part, the walking part advances and then the support parts are well supported. The self-circulation type advanced hydraulic support can improve the safety of a support environment of the fully mechanized mining working surface ventilation lane, reduce the labor intensity of miners, improve the support speed of a fully mechanized mining working surface and accelerate coal production.

The invention provides a construction method for quickly pouring anti-slide pile protection wall concrete. After a previous section of poured protection wall concrete has a certain strength, a sand cushion layer is cleared, all sand cushions are collected together for standby application, and anti-slide pile excavation is continued; after the pouring height of one section of a protection wall is reached, protection wall steel bars are welded and bound under the poured protection wall; a sand bottom moldboard is laid to the position 3 centimeters above the bottom of a protection wall side moldboard, and the width of the sand bottom moldboard is 30 centimeters or above larger than that of the protection wall side moldboard; the optimized and improved protection wall side moldboard in which concrete feeding holes are pre-formed is erected, after the side moldboard is erected, the bottom of the side moldboard is embedded deep into 3 centimeters in a sand layer to prevent grout runout, the portion 5 centimeters above the top of the side moldboard is closely attached to the face of the previous section of the protection wall, and the protection wall moldboard is reinforced through steel pipes and adjustable lead screws. A concrete lifting bucket is lifted through a small lifting winch, the concrete can be directly poured into the moldboards through a simple movable concrete sliding groove, the concrete pouring speed is high, and the labor intensity of workers is reduced. Through the steps, quick construction of the anti-slide pile sand bottom moldboards is achieved.

The invention relates to a small-section mining roadway mixing type advanced support method and belongs to the technical field of mining roadway supports. The method solves the problems that an existing support method is low in support efficiency, large in labor intensity of workers, high in cost, low in mining efficiency, insufficient in effective construction space and low in operation safety and reliability. The support method comprises the steps that 1, a mining roadway to be supported is determined; 2, a grouting anchor cable and an individual hydraulic prop mixing type advanced support are additionally installed on a top plate of the mining roadway, and a top plate support structure is formed; and 3, in the coal mining process, while the mining working face is propelled forwards, thegrouting anchor cable is additionally installed in the propelling direction constantly, an individual hydraulic prop and a hinge top beam of the working face end are pushed towards the front end of the advanced support constantly, and thus the distance of the advanced support is kept within the safe range. According to the method, the support efficiency and the mining efficiency are improved, thelabor intensity of the workers and the support cost are reduced, the support strength is higher, the support effect is better, and safe and efficiency production is achieved.

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 discloses a length determining method for an anchor rod for roadway supporting. The length determining method includes the steps that according to the shape of a cross section of a roadway, a circumcircle of a contour line of the roadway is made; then an expansion concentric circle of the circumcircle is made according to the development depth of a surrounding-rock plastic zone, and parameters of the reasonable length of the anchor rod are obtained in the mode that the distance from the surface of the roadway to the expansion concentric circle of the plastic zone, the length that the anchor rod is anchored into hard-and-stable surrounding rock and the exposed length of the anchor rod are superposed. According to the length determining method, the process that the reasonable length of the anchor rod is determined is simple, operation is convenient, the accuracy is high, materials of a rod body of the anchor rod are saved, waste is avoided, the construction speed of drilling is increased, the labor strength of workers is reduced, the surrounding-rock control efficiency of the anchor rod is improved, and the favorable condition is provided for mine safety production.

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.