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72results about How to "Improve safety conditions" patented technology

Underground on-site explosive dosing and charging truck

The invention relates to the technical field of underground explosive trucks and discloses an underground on-site explosive dosing and charging truck. The underground on-site explosive dosing and charging truck comprises a truck body, a chassis disposed on the truck body, a mechanical arm automatic hole finding mechanism and a charging conveying mixing mechanism which are disposed on the chassis, and a hydraulic system and an electric control system which are matched with the mechanical arm automatic hole finding mechanism and the charging conveying mixing mechanism, wherein the charging conveying mixing mechanism comprises an automatic charging module used for mixing and charging emulsion matrix to form emulsion explosives, a charging tube which is connected with the automatic charging module and used for conveying the emulsion explosives, and an automatic tube conveyor for automatically conveying the charging tube; the mechanical arm automatic hole finding mechanism is matched with the automatic tube conveyor and used for performing blast hole position alignment on the head end of the charging tube. The underground on-site explosive dosing and charging truck has the advantages that mechanical hole finding, automatic tube collecting and conveying and automatic blast hole filling are achieved, charging efficiency is increased, operator labor intensity is lowered, and operator safety conditions are improved effectively.
Owner:SHENZHEN KING EXPLORER SCI & TECH CORP

Mechanized continuous mining method of gently inclined thin veins based on mining machine

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.
Owner:CENT SOUTH UNIV +1

Preparation method of polymer of lipoic acid compound

ActiveCN113214482AFast and efficient ring-opening polymerizationMild reaction conditionsOrganic solventCatalytic method
The invention discloses a preparation method of a polymer of a lipoic acid compound. The preparation method is selected from a solvent-free direct hot-melting catalytic polymerization method or a room-temperature solution catalytic polymerization method. The catalyst used in the method is wide in source, easy to prepare and low in price, catalysis methods are diversified, the process is simple, metal ions are not contained, efficient catalysis can be achieved only through a trace amount of catalyst, and practical industrial feasibility is achieved; catalytic polymerization can be carried out under the condition that no solvent is directly heated and melted, and catalytic polymerization can also be carried out in a solution under the room temperature condition; the direct hot melting catalysis method does not need any organic solvent, has the advantages of rapid catalysis process, mild conditions, simple and safe operation, high atom utilization rate and no three wastes, and meets the green chemical requirements; according to the room-temperature solution catalysis method, heating and complex conditions are not needed, and efficient catalytic polymerization under the room-temperature condition can be achieved by adding a trace amount of catalyst into a monomer solution.
Owner:EAST CHINA UNIV OF SCI & TECH

A method for the expansion and support of return airway in soft rock working face of coal mine

The invention relates to a method for repairing and supporting an air return roadway in a soft rock working face of a coal mine. Firstly, a side loader is used to pull the bottom, and a roadway repair machine is used to carry out roof lifting and side expansion; For the net cable, use steel sheds for inclined miners, trough-type wooden piles and sided wooden piles to strengthen the support; for the U-shaped steel shed support section roadway, re-erect U-shaped steel sheds, trough-type wooden piles and sided wooden piles for reinforcement support. The present invention is mainly to solve the problem that during the mining process of the working face, under the influence of mine pressure and mining disturbance, the soft rock roadway will converge on the roof, floor and two sides, resulting in a significant reduction in the roadway section, affecting ventilation, pedestrians, material transportation, Coal transportation and other problems. Through the implementation of the present invention, it is also possible to effectively reduce the repair frequency of the roadway, reduce the labor intensity of workers, and increase the advancing speed of the working face, which is of great significance for improving the economic benefits of the mine.
Owner:李洪彪
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