32results about How to "Shorten support time" patented technology

The invention relates to a combined type pneumatic pick suspended on an I-steel support of a coal mine. Four pneumatic picks are combined into the combined type pneumatic pick which is hung on the I-steel support of a coal mine roadway, and a hydraulic system is used for driving the combined type pneumatic pick to move so as to carry out coal seam tunneling, so that a conventional manual coal breaking manner is replaced, the labor intensity of workers is alleviated, the speed is increased, the efficiency is improved, the input of manpower and material resources is reduced, and the safety factors are improved. The combined type pneumatic pick swings from side to side by adjusting a direction adjustment air cylinder, so that the width range of tunneling of the combined type pneumatic pick is extended; the combined type pneumatic pick swings up and down by adjusting an upper height adjustment oil cylinder and a lower height adjustment air cylinder, so that the height range of tunneling of the combined type pneumatic pick is extended; the height range of tunneling of the combined type pneumatic pick can also be extended by an upper oil cylinder; the combined type pneumatic pick is pushed to tunnel continuously and forwards by pushing an oil cylinder and a telescopic cylinder.

The invention relates to a shed upper beam device of an I-beam shed for a coal mine laneway, which includes a cantilever, wherein the cantilever is arranged in a sleeve; the sleeve is hung on an erected I-beam shed upper beam through a fixator; a propulsion support is hung on the erected I-beam shed upper beam; the rear end of the cantilever is connected with the propulsion support through a propulsion device; the front end of the cantilever is hinged with the rear end of a height adjusting arm; the height adjusting arm adopts a hollow structure, and is internally provided with a width adjusting device, a connecting rod and an outrigger device; the rear end of the width adjusting device is fixed with the inner bottom surface of the height adjusting arm; the front end of the width adjusting device is connected with one end of the connecting rod through a width universal joint; the other end of the connecting rod is fixed with the outrigger device; and the bottom of the height adjusting arm is connected with the front lower part of the cantilever through a height adjusting device. The I-beam shed upper beam can be installed through firstly adjusting the mounting position of the I-beam shed upper beam through the width adjusting device and the height adjusting device, and finally through manually fixing the I-beam shed upper beam.

The invention discloses an automatic rod feeding device for a mine anchor rod drilling machine. The device comprises an anchor rod storing mechanism, a first manipulator, a second manipulator and a fixing seat. According to the device, an anchor rod is stored into semicircular grooves in an upper index plate and a lower index plate through the anchor rod storing mechanism; the anchor rod is grasped, conveyed and positioned through the first manipulator and the second manipulator; therefore, automatic conveying of the anchor rod is achieved; the replacing efficiency of the anchor rod and a drilling rod can be increased; the time of supporting the tunnel is reduced; the risk of collapse of the tunnel is reduced.

Movable equipment used for a down hole heavy support comprises a conveying track mounted in the supporting range of the heavy support, and the conveying track is formed by segmented tracks through connecting cards in a lapped and joint mode; on the side, where the heavy support is located, of the conveying track and in the position where the connecting cards are located; the conveying track is further fixed to a top beam of the roadway through a plurality of connecting chains located above, and the horizontal of the track surface is maintained; the two ends of the conveying track are provided with two curved track segments with opposite turning directions, and the track surfaces of the two curved track segments are maintained horizontal, and connected back to the track surface of the conveying track in return after being bent toward one side of the conveying track; and the conveying track is provided with a draft device, the draft device is provided with a connecting piece for installing the heavy support. According to the movable equipment used for the down hole heavy support, the need of the fast moving of the mine hole hydraulic pillar can be met, the labor intensity of the workers can be relieved, the security is improved, the production efficiency of the fully mechanized coal mining face is improved, and the drawback that a top plate is repeatedly supported by a traditional moving support can be avoided.

The invention discloses an integral casting process for a reinforced concrete wastewater tank in predrilling engineering. The integral casting process comprises the following steps of a, construction of a foundation and a bedding layer, digging a foundation pit, and casting the concrete bedding layer after determining that the foundation bearing force meets the design requirements; b, manufacturing and installation of reinforced bars, manufacturing and installing on site, wherein the overlapping length of the reinforced bars should not be less than 40 times of the diameter (mm) of each reinforced bar, and the overlapping area of the reinforced bars same in cross section should not be more than 50% of the total area; c, supporting of die plates, binding the die plates into the shapes of the bottom and the wall of a concrete tank; d, casting of concrete, after completing the construction of the reinforced bars and the die plates, carrying out the casting construction of concrete, firstly casting the bottom of the concrete tank and the wall with the height less than 1m, leveling the top of the wall of the concrete tank, and reserving no step to complete the first time of casing; casting the residual wall of the concrete tank in at least one hour after completing the first time of casting; and e, removal of the die plates, removing the die plates when the strength of the cast concrete being more than 1.2MPa. The integral casting process has the advantages that the construction time of the wastewater tank in the predrilling engineering is reduced, the construction period of the whole predrilling engineering is shortened, the condition of drilling machines not waiting for well fields is ensured, the construction seams are not reserved in the construction, and the leakage problem caused by the construction seams is avoided.

A reaming and self-rotating anchor rod includes a rod body, a drill bit, a connecting member, a tray, and a nut. One end the connecting member is snap-fixed to the tail part of the rod body, the other end of the connecting member is connected to an anchor rod bolter. The rod body has an annular protrusion at its middle part to block powder so that the powder fills up the clearance between the rod body and the coal mass. The drill bit has female threads and can be screwed into the front part of the rod body, and the drill bit has baffle pawls and spiral grooves on its side surface.

The invention relates to a moving and recycling method of comprehensive collecting equipment, in particular to a method for supporting a triangular area in a coal mine support-dismantling process and solves the problem of low efficiency of a maintenance method of a support-dismantling space top plate in a support-dismantling process of the traditional comprehensive collecting working face. Three shielding frames are arranged at the original triangular area; after a support is dismantled, two frame canopies are arranged at the place of the original support in a direction vertical to the shielding frames; three columns are used for supporting; plate beams are used for supporting above a single column, and then the shielding frames are drawn, wherein the drawing sequence of the shielding frames is that: the shielding frame close to a coal upper side is drawn firstly to bear the plate beams on the front ends of the supports to be dismantled, after chocks are piled behind the shielding frame and the shielding frame is returned to the back of a coal upper column, the middle shielding frame is drawn secondly to make the ends of the beams bear the plate beams in the triangular area, and the shielding frame close to an old pond side is drawn finally to bear the plate beams; and after an old pond and the single column affecting the dismantling of the support are returned back, the supporting and circulating process of shielding the support is finished. By the method, the working efficiency is improved and materials are saved.

The invention relates to an incipient support method of a newly built tunnel, in particular to the incipient support method of the newly built tunnel applied to the field of supporting engineering under a geological condition of poor surrounding rock. The invention provides the incipient support method of the newly built tunnel which can restrain an oversized and distortional surrounding rock ahead and in time, reduce tunnel overbreak quantity, prevent safety risks of disengagement, reduce supporting amount and save investment. The method comprises the steps of a, arranging vertical steel bar holes along a tunnel excavation contour surface; b, steel bar blanking; c, cramming an anchoring agent; d, inserting vertical steel bars; e, connecting and fixing external exposed parts of the steel bars; f, excavating the tunnel; g, removing dangers; h, incipient concrete spraying support; i, supporting construction system anchor bolt; j, installing annular steel bars; k, installing steel frames; l, respraying concrete. The incipient support method of the newly built tunnel can restrain an oversized and distortional tunnel, reduce tunnel overbreak quantity, reduce steel frame support amount, reduce spray layer thickness, reduce incipient support time and reduce safety risks.

The invention discloses a breaking-resistant anchoring apparatus suitable for large-deformation roadway surrounding rock and a construction method of the breaking-resistant anchoring apparatus. The breaking-resistant anchoring apparatus comprises an anchor rod and a plurality of anchor ropes; a plurality of grooves are formed in the side wall of the rear end of the anchor rod, and the rear ends of the anchor ropes are embedded inside the corresponding grooves; a nut, a base plate and a supporting plate are arranged at the position, adjacent to the rear end, of the anchor rod, the nut is arranged adjacent to the rear end of the anchor rod, and the base plate is disposed between the supporting plate and the nut; a plurality of anchor rope through holes are respectively formed in the base plate and the supporting plate, and the anchor ropes are fixed in the anchor rope through holes of the base plate by virtue of anchorage devices; and a retainer ring is arranged at the front end of the anchor rod, a plurality of anchor rope through holes are formed in the retainer ring, the front end of each anchor rope penetrates through the anchor rope through hole, a clamp is arranged in each anchor rope through hole, and the front end of each anchor rope is fixed by virtue of the clamp; and a part, disposed between the supporting plate and the retainer ring, of the anchor rope is wound at the outer side of the anchor rod. The breaking-resistant anchoring apparatus is simple in structure, convenient to install, and low in supporting cost; and the elongation percentage is large, the deformation of the roadway surrounding rock can be effectively controlled, and the long-term stability and normal use of the roadway surrounding rock can be ensured.