39results about How to "Avoid mining" patented technology

A control system for continuous mining machine to control the mining horizons of roof and floor horizons relative to the rock boundaries of an underground coal seam or ore vein. The mining machine is provided with a cutting drum mounted on a pivoted arm to allow for vertical displacement of the cutter to control the mining height. A plurality of sensors is carried on the rotatable arm to locate the roof and floor boundaries. Attitude sensors are mounted on the machine for providing signals indicative of the inclinations of the body of the machine, and, a microprocessor receives the signals from the boundary sensors and the attitude sensors for calculating the required roof cut and floor cut. A display device receives the signals from the microprocessor and displays the calculated results to the machine operator.

A method for making hydrophilic homopolymers and copolymers of poly 2-hydroxyethyl methacrylate. Also disclosed are coatings, films, hydrogels, cosmetic compositions, dermatological compositions, pressure sensitive adhesives containing the hydrophilic homopolymers or copolymers of poly 2-hydroxyethylmethacrylate. Further disclosed are methods of coating substrates with the hydrophilic homopolymers and copolymers of poly 2-hydroxyethyl methacrylate and hydrophilic pressure sensitive adhesives.

The invention discloses a nutrient solution matrix-free seedling raising and cultivating system and a seedling raising method. The system comprises a nutrient solution seedling raising tank, a seedling grid plate, seeding paper and covering paper, wherein the nutrient solution seedling raising tank is filled with water or nutrient solution; the seedling raising grid plate is arranged on the nutrient solution seedling raising tank, and water through holes are formed on the side faces of the grid plate holes of the seedling raising grid plate; the seeding paper is laid on the seedling raising grid plate; and after seeding, the covering paper is covered on the seeding paper bearing seeds. The method comprises: sowing seeds on the seeding paper, covering the covering paper with high water absorbing performance and breathability and covering the perlite or vermiculite on the covering paper; and after the seeds germinate, the roots of the seedlings penetrate the seeding paper to grow downward to absorb water and nutrients from the nutrient solution below. When the system is used, a matrix which is adopted by the conventional industrial seeding raising technique is not used, the overall accurate control over the temperature, water, nutrient and oxygen required by plants for growth in the whole seedling raising process is realized, the industrialization of the seedling raising processis realized, and the uniformity, strong seedling rate and robust degree of the seedlings are improved.

The invention relates to an assembly type anti-seismic anti-freeze-thaw deformation self-adaptive corrugated plate rigid-flexible retaining wall. The retaining wall comprises a bottom plate and a retaining plate above the bottom plate, and the cross section of the retaining wall is in an inverted T shape; the bottom plate transversely comprises a plurality of rows of unit plates which are sequentially a front end bottom plate, a middle connecting bottom plate and a foundation bottom plate from inside to outside and are assembled and connected through inserting grooves and inserting strips in the end faces; the retaining plate comprises a plurality of stand columns and an arched steel corrugated retaining plate among the stand columns, strip-shaped grooves are formed in the two longitudinalside faces of each stand column, and the ends of the arched steel corrugated retaining plate are inserted into the strip-shaped grooves of the stand columns; and the longitudinal inserting grooves are formed in the surface of the foundation bottom plate, and the bottoms of the stand columns and the arched steel corrugated retaining plate are inserted into the inserting grooves of the foundation bottom plate. According to the retaining well, a prefabricated assembly type construction method is adopted, foundation deformation caused by huge horizontal seismic force and frost heaving force and vertical frost heaving force can be adapted, and the cyclic deformation adaptive capacity is achieved.

The invention discloses a complex travertine. The complex travertine is made of the following materials in weight percentage: 15 to 45 percent of gelled material, 55 to 85 percent of filler, 1.5 and 2.5 percent of additive and the balance being proper quantity of toners. The invention also discloses a method for preparing the complex travertine, and the method comprises the steps of mixture making, blending, material distribution, heating, demolding, cutting and fine grinding treatment, etc. All cutting faces of the complex travertine of the invention have clear, regular and uniform textures, and the products with different textures, patterns and holes can be made according to the requirements of a customer, and the product is beautiful and elegant in appearance; at the same time, the natural rocks in nature are avoided form being exploited, and the mining waste materials can be recovered, thereby protecting the ecological environment.

A window roller blind assembly for motor vehicles which includes a roller blind that can be drawn from a wind-up shaft by a motor driven driving element engageable with a pull rod of the roller blind. To prevent pinching as a result of the pull rod engaging an obstacle during operation of the roller blind assembly, an electrical system is provided for monitoring operation of the roller blind motor. The system is operable for switching off current to the motor when a preset value is exceed, which is interpreted as a signal that pinching or squeezing of an obstacle is occurring.

The invention discloses a method for purification of dichlorosilane from dry method recovered materials, and comprises the following steps of: a) obtaining a dry-method recovered material by recovering from reduction tail gas of the polysilicon production process by a dry method, feeding the recovered material into a first dry method rectifying tower for rectification, recovering a first low-boiling-point substance from the tower top of the first dry method rectifying tower, and recovering intermediate chlorosilane from the tower bottom of the first dry method rectifying tower; b) feeding the first low-boiling-point substance into a separation column for separation, recovering boron impurity from the top of the separation column, and recovering dichlorosilane from the bottom of the separation column; c) feeding the intermediate chlorosilane into a second dry method rectifying tower for rectification, recovering a second low-boiling-point substance from the tower top of the second dry method rectifying tower, and recovering silicon tetrachloride from the tower bottom of the second dry method rectifying tower. According to the method of the invention, the second low-boiling-point substance is a mixture of dichlorosilane and trichlorosilane which can be directly fed into a reducing furnace for reduction reaction, thereby saving the process of mixing the dichlorosilane and the trichlorosilane.

The invention discloses a green low-carbon environment-friendly road structure adopting regenerative material. The structure comprises a subgrade and a pavement which are sequentially arranged from bottom to top; the subgrade comprises an embankment and a road bed which are sequentially arranged from bottom to top, wherein the embankment is prepared from urban building waste regenerative mixture,and the road bed is prepared from urban building waste regenerative grading mixture; and the pavement comprises a cushion layer, a bottom base layer, a base layer, a lower layer, a middle layer and anupper layer which are sequentially arranged from bottom to top, and the cushion layer is prepared from building waste regenerative grading aggregate. According to the structure, the requirements of the existing traffic development can be guaranteed, the environmental problems left due to the urban development are resolved, and the problem of destructive mining on natural resources due to the foundation engineering construction is solved.

The invention discloses a formula for a polyolefin foaming building template and a technology and relates to the technical field of high polymer materials. The technology comprises the steps of mixing, granulation, drying, stirring, extrusion, cooling, shaping and cutting. A side feed manner is adopted, so that the product performance of the polyolefin foaming building template is improved; the problems of poor toughness, low strength, high possibility of contraction deformation and nonuniform product foaming density of a polyolefin foaming material are solved; a prepared product can be widelyapplied the field of buildings and the like; a high infrared radiation foaming oven is adopted for foaming of an extruded plate; the product quality and production efficiency are improved; and the formula and the technology have good market prospects.

The invention provides a device and a method for restoring hexavalent chromium polluted soil in situ. The device comprises a pipe body with one closed end, a carbon brush anode, a carbon cloth cathode, a cation exchange membrane and a load resistor; a plurality of communicating holes are uniformly formed in the side wall of the pipe body, the cation exchange membrane coats the outer side wall of the pipe body, the carbon cloth cathode coats the outer side of the cation exchange membrane, the carbon brush anode is inserted into the pipe body, the interior of the pipe body is also used for containing an anode liquid, one end of the carbon brush anode is connected with the carbon cloth cathode through a titanium wire, and the load resistor is connected with the titanium wire in series. According to the device, the structure is simple, the hexavalent chromium polluted soil can be restored in situ, hexavalent chromium in the soil is reduced into trivalent chromium which is low in toxicity and is not easy to migrate, the restoring process is simple, and the restoring effect is thorough.

The invention provides a carbon dioxide trapping agent and a preparation method thereof, and relates to the technical field of energy conservation and emission reduction. The carbon dioxide trapping agent comprises the following raw materials: calcium orthosilicate and an alkali metal carbonate, wherein the molar quantity of the alkali metal carbonate accounts for 60% or more of the total molar quantity of the calcium orthosilicate and the alkali metal carbonate. The method has the advantages that the carbon dioxide trapping agent is wide in raw material source, low in preparation cost, low intrapping temperature and capable of achieving rapid regeneration, and no pollutant is generated in the whole process.

An embodiment of the invention discloses an environment-friendly food material edge-wrapped honeycomb and a production and packing method. The honeycomb comprises a bottom supporting plate and throughholes formed in four corners of a bottom supporting plate, a supporting vertical rod is fixedly mounted in each through hole, a vertical through hole is formed in each supporting vertical rod, a foodmaterial edge wrapping plate is arranged between each two adjacent supporting vertical rods, and a plurality of layers of protective films wrap the outer side of each food material edge wrapping plate. The production and packing method specifically comprises the following steps: placing the food material edge-wrapped honeycomb into a beehive, and making beehives and producing honey by bees in thefood material edge-wrapped honeycomb; forming a beeswax honeycomb by waxing the food material edge wrapping plates, and taking out the food material edge-wrapped honeycomb after honey brewing is finished; taking out the food material edge-wrapped honeycomb to drive out the bees, and directly placing the food material edge-wrapped honeycomb into a packaging box. An edible material is adopted as the design of wrapping edges around the honey, so that the honey can be directly fed into the mouth to be eaten, and meanwhile, the circumstance that the honey is damaged and leaked during transportation is prevented.

An endoscopic or laparoscopic introducer, a medical device to assist the surgeon with the insertion, maneuvering, and removal of an endoscope, laparoscope, biopsy device, or medical device from a patient's body during endoscopic or laparoscopic surgery. The advancement relates to an introducer and specifically to an autoclavable modular introducer. Introducer is modular and is capable of attachment to numerous types of fittings and thereby capable of coupling and decoupling to numerous types of endoscopes, cannulas, insufflation flow sources, biopsy devices, and other medical devices. Introducer is autoclavable in that it is capable of sterilization by autoclave without incurring deterioration or degradation. This invention incorporates a biopsy port in the modular introducer system for the surgeon to extract cells and tissues for biopsy procedure.

The invention discloses a GIS spatio-temporal data model for underground illegal mining identification. The GIS spatio-temporal data model comprises a geometric element model layer, a spatio-temporal process model layer, a spatio-temporal inversion model layer and an illegal identification model layer.The four model hierarchies are mutually associated and interacted, expression of spatio-temporal processes of mine geological objects such as ore bodies, roadways, rock masses, mining right ranges, underground mining faces and goaf under the multi-time granularity and multi-space scale, fusion of multi-level and multi-source earth observation data and response of multi-level illegal mining events can be comprehensively supported. The GIS spatio-temporal data model for underground illegal mining identification is established by combining actual requirements of real-time monitoring of underground illegal mining and simulating and describing a mining subsidence spatio-temporal change process on the basis of analyzing and expressing mining subsidence spatio-temporal change, and a platform guarantee is provided for subsequent identification and monitoring of different types of illegal mining events.