34results about How to "Save excavation costs" patented technology

In this excavation tool, an embedding hole (8) is provided piercing the tip of a tool main body (1) that rotates around an axis line (O) and progresses towards the tip in the axis line (O) direction, an excavation tip (5A) wherein a cylindrically-contoured embedding section (6) and a blade tip section (7) are integrally formed is inserted into the embedding hole (8) causing the embedding section (6) to be inserted into the embedding hole (8) and the blade tip section (7) to protrude from the embedding hole (8), and the excavation tip (5A) is attached in a manner so as to be able to rotate around the center line (C) of the embedding section (6) during excavation and in a manner so as to be prevented from dislocating towards the tip in the direction of the center line (C).

The present invention discloses a mining- machine- based slowly inclined thin ore vein mechanized continuous mining method, a middle-section tape transport lane is arranged along an ore body, false inclination uphill is tunneled at intervals of a certain distance; a continuous rib pillar and a top pillar or a bottom pillar are arranged between adjacent back- mining units; accurate mining cutting is started from the lower middle section tape transport lane, a mining machine passes, from the back- mining unit edge position, through the top pillar or the bottom pillar for tunneling left and right false inclination uphill to the upper middle section tape transport lane; back- mining is started from the position of the tape transport lane uphill from the right side, the ore body is back mined by the mining machine to left side uphill, the mining machine is in no load, and descends along the left false inclination uphill to the bottom of the back- mining units, the ore body is back mined by the mining machine from left side uphill position to right side uphill, then the mining machine is in no load, and ascends from the right side uphill to the position near the tape transport lane, the mining is performed in the anti-clockwise direction circulation way, a central position reserved ore pillar is left; ores are loaded onto a belt by a carry-scraper for conveying to a ground surface main ore bin. The conveying is easy, work security is high, back- mining efficiency is high, and production capacity is large.

A high-temperature flame assistant intelligent drilling machine is used for baking front rock stratums to enable rocks to be cracked because of uneven heating and then reduces excavation and drilling difficulty when the drilling machine carries out drilling. The high-temperature flame assistant intelligent drilling machine is composed of a drilling machine unit, a drill platform and a master control system. The drilling machine unit comprises a body, a track advancing system and a hydraulic supporting system. The drill platform comprises a sleeve shaft, a drill, a drill base, a drill motor, a drill platform motor and a flame nozzle. The master control system comprises a control center arranged in the drilling machine unit, a position sensor arranged in the track advancing system, a temperature sensor arranged near the drill, and a pressure sensor arranged on the drill platform. The high-temperature flame assistant intelligent drilling machine can greatly reduce tunnel excavation cost and improve construction speed.

A multi-head cemented carbide composite column tooth and a preparation method thereof, wherein the cemented carbide composite column tooth is designed into a tooth head and a tooth body in the height direction, the tooth head includes 2 to 3 tooth heads, and the tooth head It is axisymmetrically distributed, including the steps: Step 1: Prepare the tooth body raw material and the tooth head raw material; the tooth head includes 10~20wt% carbonized spherical cast tungsten carbide particles, 1~7wt% wax-based composite molding agent, and the balance is Tooth material. Step 2: Inject the tooth head raw material and the tooth body raw material into the mold respectively through a co-injection molding method to obtain a soft cylindrical tooth blank with a composite structure. Step 3: Carrying out high-temperature and low-pressure sintering on the soft billet of the column tooth with a composite structure, the metallurgical reaction at the bonding interface of the tooth head and the tooth body forms a transition layer, and integrally forms a cemented carbide composite column tooth with multiple tooth heads. It solves the technical problem that the existing cemented carbide column tooth cannot take into account both wear resistance and toughness at the same time, and significantly improves the wear resistance and rock breaking efficiency of the column tooth, thereby improving the service life and drilling speed of the drilling tool.

The invention discloses a tunneling method capable of weakening hard rock strength. According to the method, a tunneling machine, an integrated grinding jetting drilling machine with the tunneling machine as a carrier, and a high-pressure water pump are arranged on a tunneling working surface; the integrated grinding jetting drilling machine is adopted to form drilled holes in a rock body, and a series of conical crack clusters are formed through cracking cutting on the basis of hole drilling; a high-pressure hole sealing device is used for sealing the tunneling surface for a distance, the high-pressure hole sealing device is communicated with a high-pressure water pump through a water inlet pipe, the characteristic that the rock body is resistant to pressure but not resistant to drawing is utilized, the conical crack clusters in the rock body are expanded to form a dense conical crack net, and therefore the rock strength is weakened; a tunneling machine cutting head is adopted to cutthe rock which has an internal conical crack net, the tunneling efficiency is greatly improved, the service life of the tunneling machine can be prolonged, and the tunneling cost is reduced.

The invention discloses an auger mining machine continuous mining method for soft rock ore bodies with gently inclined extremely thin veins. Interval ore pillars are reserved between the panel and the panel; stage transportation roadways are arranged along the ore body in the ore vein, the top pillar is reserved on the top of the ore block, and the mining is carried out in the center of the ore block along the inclination to go up the mountain, and the back mining up the mountain is supported by bolts; The drilling and mining machine enters the back mining from the stage transportation roadway, starting from the position of the top pillar of the ore block, from top to bottom, the left and right sides are retreated at the same time, and the roof is supported by hydraulic props. The wind presses towards the ore pile, and this is repeated, and the extremely thin ore body is continuously mined, and the ore is discharged through the scraper. When the entire ore block is mined, the hydraulic prop is removed, and the ground pressure is controlled by the gravity of the roof. The invention has low ore dilution rate, high mining efficiency and safety, and low construction cost.

The invention relates to a gob-side entry retaining method of a solid filling coal mining half-section one-leg shed, which comprises the steps of supporting the coal side and the top plate of a roadway entity, filling a gob with a coal mining filling hydraulic support and a fill mining conveyor behind a filling coal mining working surface, and then fixing a row of H-shaped steel with an anchor rod and an anchor rope at the 1 / 3 point of the distance from an end top plate of the working surface to the gob; with the forward movement of one pace of the coal mining filling hydraulic support, a metal net is paved and side-wall I-beams are bridged firstly on the outer side of the gob; simultaneously, a metal net is paved within 1 / 3 of the distance from the top plate to the gob, and then a stull I-beam is bridged so as to form a reverse L-shaped one-leg shed steel structure support body; and with the forward movement of the coal mining filling hydraulic support, the side wall I-beams are connected and fixed via steel bars, and one-leg shed steel structure support bodies are connected into sheets which are matched with the support of the coal side and the top plate of a roadway entity to realize the gob-side entry retaining of a filling mining work surface mining roadway. The method is simple, has high support strength and low cost, is implemented easily and has high efficiency.

The invention discloses a reinforced concrete cast-in-place pile construction method free of excavation of earth among piles. The reinforced concrete cast-in-place pile construction method includes the steps that firstly, foundation pit excavation and support construction are conducted, wherein a construction foundation pit is excavated from top to bottom, and the excavated and formed foundation pit is supported; secondly, construction of a concrete cushion layer at the bottom of the foundation pit is conducted; thirdly, pile position measurement and pay-off are conducted, wherein measurement and pay-off are conducted on pile positions of all reinforced concrete cast-in-place piles needing to be constructed in the foundation pit; and fourthly, reinforced concrete cast-in-place pile construction is conducted, wherein when construction of any reinforced concrete cast-in-place pile is conducted, the process includes the following steps of breaking of the concrete cushion layer at the pile positions, hole drilling, reinforcement cage hoisting and placing, pile head forming mold installation, concrete cast-in-place construction and pile head forming mold detachment. The method is simple in step, reasonable in design, easy and convenient to construct and good in use effect; and by adjusting the construction procedures of pile foundations, the earth-among-pile excavation process in the traditional reinforced concrete cast-in-place pile foundation construction process is omitted, the construction period can be effectively shortened, and the construction cost is saved.

The invention discloses a smoothwall blasting method for digging a tunnel. The method includes the basic processes of marking the shot point, digging and drilling holes, installing the blasting devices, connecting all the blasting devices through detonating fuses, connecting a millsecond detanator and an electric detonator, and finally detonating through a blaster. The method solves the problem of big damage to the wall rocks in the process of digging and blasting the tunnel and is particularly good for controlling over-excavation and under-excavation. The method saves the digging cost and atthe same time makes the late support construction of the tunnel simpler and more economic.

The invention relates to the pipeline construction method field of a metallurgy system, in particular to a pull pipe mounting method of a passing pipeline, which comprises the following steps of: unreeling a pipeline; digging pilot trenches; making the pipeline; popping conducts; connecting steel wires; pulling the conducts and the steel wires; pulling sleeves; and penetrating and mounting a construction pipe. The pull pipe mounting method of a passing pipeline is characterized in that when the conducts are popped, the front conduct is popped in by top pressing equipment (4); and then, the rear conduct (12) is popped in; and when the sleeves are pulled, the conducts and the sleeves are connected, the front conduct (11) is pulled, and the rear sleeve (22) is popped in until the front sleeve (21)passes out of a pilot trench (2) at the other side. The invention has low construction cost, short construction period, high mounting quality and high production efficiency.