34results about How to "Reduce mining difficulty" patented technology

The invention discloses a safe, high-speed and lightweight blockchain system and method, wherein the system comprises an initialization module, a registration and transaction module and a block generation module; the initialization module runs when the system is initialized, and is used for setting relative parameters of the blockchain system and deploying a point-to-point network, so that the system function is initialized and reaches a steady state through block generation in an initial stage; the registration and transaction module is used for calling a user registration function when a user joins in the system, generating a public/private key pair of the user, sending a trading card into a blockchain network, verifying the validity of the trading card through a network node, and continuously broadcasting legal transaction to the whole network; the block generation module is used for determining a miner candidate set of a current block according to the trading participant address ina specific block in a target blockchain system appointed by the system; and a candidate in the miner candidate set generates a new block by competition by utilization of a consensus mechanism. By means of the system, the problem of low verification efficiency ubiquitous in the blockchain system can be effectively solved.

The invention relates to the technical field of underground brine mining, and specifically provides a closed underground brine mining system and a construction method thereof. The closed underground brine mining system includes a gas compression device, a first water isolation layer, a second water isolation layer, a brine storage layer, partition walls, brine drainage wells and water isolation dams, wherein the brine storage layer, the partition walls, the brine drainage wells and the water isolation dams are located between the first water isolation layer and the second water isolation layer. The upper ends of the partition walls extend to the first water isolation layer, the lower ends of the partition walls extend to the second water isolation layer, and the partition walls, the firstwater isolation layer, the second water isolation layer and the water isolation dams divide the brine storage layer into a plurality of enclosed spaces. Each enclosed space is a brine mining block. Agas compression well is arranged at the position, near the center of a lake, in each brine mining block, the brine drainage wells are arranged at the positions, near the edge of the lake, in the brinemining blocks, the brine drainage wells are provided with brine drainage pipes, and brine can be drained through the brine drainage pipes and then directly transported to salt pans or grit chambers.The closed underground brine mining system can reduce the cost of brine mining, greatly increases the mining amount of the brine, and improves the mining efficiency and increases the recovery rate.

The invention belongs to the field of catalyst synthesis, and particularly relates to a preparation method and an application of a catalyst for visbreaking behavior of heavy oil by aquathermolysis. The method comprises specific steps as follows: ferric chloride is weighed and added to a three-neck beaker, ethanol, water, n-hexane and oleic acid are added to the three-neck beaker in sequence, magnetic stirring is performed, NaOH is added, heating and reflux condensation are performed, after a ferric oleate compound and an oleic acid mixture are synthesized and added to sodium alkylbenzene sulfonate, a mixture is dissolved in octyl ether, 1-octadecene or 1-eicosylene, a mixed solution is subjected to temperature programming and then cooled to the room temperature, ethanol is added to the solution, centrifugal separation is performed, and the target product, namely, the catalyst for visbreaking behavior of the heavy oil by aquathermolysis is obtained. The target product is cheap and easily available and has low energy consumption and excellent visbreaking effect, and physical properties and nanoscale can be set by selecting correct reaction temperature, reaction solvent or reaction time.

The invention discloses a blockchain-based multi-currency transaction fee collection method. The method comprises the following steps of calculating a commission according to a transaction size, preferentially using gas billing and directly switching the token billing if a gas payment fee is insufficient, and completely transferring normal transaction gas and using token billing if a transaction currency is token. According to the method, the transaction cost is reduced by optimizing a transaction fee, the billing token is distinguished to be in a relatively stable range, and the price fluctuation is small. The participation of the mining machine is reduced, resources are saved, the difficulty of mining is reduced, a mining reward mechanism is canceled, the time of block out is improved, speculative behaviors are reduced, the transaction cost can be flexibly set, and the method is suitable for different business needs.

The invention provides a method for combined exploitation of coal and its associated oil shales. The method comprises the construction steps that when the coal and its associated oil shales are located in a reasonable exploitation bed separation distance range, coal resources located at the lower portion are firstly exploited, a mine bearing pressure is fully utilized to destroy associated oil shales located in an overlying rock layer and reduce the strength; then, the associated oil shales at the upper portion are exploited later to achieve combined exploitation of coal and its associated oil shales. Therefore, the shortcoming that when oil shales are independently exploited, the oil shale strength is higher and accordingly a coal cutter difficultly break rocks can be overcome. According to the exploitation method, existing infrastructures and sinking and driving engineering can be fully utilized, the roadway tunneling amount can be decreased, investment can be reduced, the costs are low, the phenomenon that the oil shales associated with coal are severely abandoned can be effectively completely eradicated or decreased, the resource utilization rate can be improved, an economic value is huge, and the method has the important practical significance on relieving of conventional energy source supply and demand pressure, energy structure adjustment and energy guaranteeing.

The invention discloses a high section trend wall-type fully mechanized caving mining method for a large inclined super high seam. The method conducts respective mining on a plurality of mining sections in the same section from top to bottom, and the mining process is as follows: first, determination of a coal face: the coal face of a mining section in the current mining section is determined; the coal face is a high section trend wall-type inclined coal face and is the actual mining face; the coal face is divided into a lower section coal face and an upper section coal face above the lower section coal face; and the lower section coal face is a polyline section coal face, and the upper section coal face is a linear section coal face; 2, determination of the height of the section; and 3, coal seam mining: a plurality of coal seam sections are mined respectively. The method of the invention has the advantages of simpleness, reasonable design, simple construction and high-efficiency safe and reliable mining process, and can effectively solve the problems of severe mining difficulty, low safety factor and incapability of efficient mining in the mining process of large inclined super high seam.

The invention relates to a semi-closed underground brine mining system and a construction method thereof. The semi-closed underground brine mining system comprises a gas pressing device, a first waterresisting layer, a second water resisting layer, a brine storage layer positioned between the first water resisting layer and the second water resisting layer, a partition wall and brine collecting channels. The upper end of the partition wall extends to the first water resisting layer, and the lower end extends to the second water resisting layer; and the brine storage layer is divided into multiple closed spaces by the partition wall, the first water resisting layer and the second water resisting layer. The brine collecting channels and brine outlets are excavated in a top salt rock layersof the closed spaces; the closed spaces are horizontally penetrated by the brine collecting channels to form semi-closed spaces; and the semi-closed spaces are brine collecting blocks. A gas pressingwell is arranged in each brine collecting block; brine outlets are excavated in the opening sides of the brine collecting blocks; and the brine outlets penetrate to the brine storage layer, and communicate the brine storage layer with the brine collecting channels. The semi-closed underground brine mining system can reduce the brine collecting cost, greatly improves the brine collecting amount, improves the mining efficiency, and improves the recovery rate.

The invention provides an FRP pipe composite bar sea sand concrete column and a preparation method thereof. The concrete column includes an FRP-steel composite bar cage, an FRP pipe and concrete. TheFRP steel-composite bar cage is formed by an FRP-steel composite bar and a spiral stirrup wound around the outside of the FRP-steel composite bar. The FRP steel-composite bar includes a steel bar andan FRP fiber layer coated on the outer surface of the steel bar. When the concrete column is subjected to axial pressure, the steel bar in the FRP-steel composite bar exerts the compression resistance. When the column is biased, the FRP-steel composite bar placed on the tension side can not only exert high tensile strength of an FRP material but also take advantages of the high tensile strength and good ductility of the steel. Correspondingly, the steel bar in the FRP-steel composite bar on the pressure side exerts the compression resistance, high modulus of elasticity, good ductility and outstanding anti-corrosion performance can be achieved, and seawater and sea sand not desalinated can be used directly.

The invention provides a method for exploiting high-viscosity oil. According to the method, high-temperature low-viscosity oil or a combination of the high-temperature low-viscosity oil and gas is injected into a high-viscosity oil reservoir for huff-puff exploitation; the high-temperature low-viscosity oil or the combination of the high-temperature low-viscosity oil and the gas is used for reducing the viscosity of the high-viscosity oil in the stratum by dissolving and heating, and increasing the stratum pressure; the high-temperature low-viscosity oil comprises one or a combination of morethan two of a light fraction and a middle fraction obtained by on-site distillation of the high-viscosity oil; the light fraction is obtained by carrying out atmospheric distillation on high-viscosityoil subjected to dehydration and desalination treatment; and the middle fraction is obtained by performing reduced pressure distillation on a heavy fraction obtained by performing normal pressure distillation on high-viscosity oil subjected to dehydration and desalination treatment.

The invention discloses an ore drawing mining method for an inclined layered solid ore deposit. The ore drawing mining method comprises the following steps of firstly arranging an air return roadway, a transportation roadway and a pseudo inclined working face, carrying out advanced presplitting blasting, then utilizing a mining machine to mine, propelling along the trend of an inclined ore body, carrying out ore falling and transporting to the ground, sequentially moving and supporting an ore drawing bracket after the mining is finished, then drawing and transporting the ore on a top layer ore body, and finally processing the goaf by using a filling method. The mining process can be propelled along the trend of an ore bed, the arrangement of the working face is simple, the false bevel angle of the working face is 20-30 degrees, the mining preparation engineering is simplified, the mining preparation cutting engineering amount is reduced, the mining efficiency is improved, the occurrence of roof accidents is reduced, and the problems of large mining preparation workload and low mining rate in an existing non-coal solid ore deposit mining technology are solved. The mining method is suitable for the non-coal solid ore deposit with the dip angle of 35-65 degrees and the thickness of 5-15 m.