59 results about "Internal fracture" patented technology

The invention discloses an integrated monitoring and early warning system and early warning method for dynamic condition of deep well drivage construction. The system comprises a monitoring and controlling system platform and a system signal collection unit. The method comprises collecting geological condition data about the deep well drivage construction, arranging an acoustic emission signal sensor and a microseismic pick up seismic station on the roadway to collect internal fracture and instability precursor signals of surrounding rocks, arranging a macroscope deformation and pressure data collecting device for surrounding rocks is arranged, transmitting the internal fracture and instability precursor signals of surrounding rocks, crustal stress, impacting tendency of coal-rock mass, drilling yield, construction geological condition data, support pressure, surface convergence deformation, drilling inner stress and drilling inner damage signal to a monitoring system unit, laying out controlling scheme and construction solving method by the system when an early warning unit delivers early warning. The integrated monitoring and early warning system and early warning method for dynamic condition of deep well drivage construction is scientific in system, safe and practical, and strong in effectiveness. In-time monitoring and early warning for well construction under high stress is realized.

The invention discloses a method for forcedly draining gas from underground gas and liquid alternate phase-drive fracture coal of a coal mine. The method includes constructing a fracture drilled hole and a water guide hole in a local coal seam or across seams and performing high-pressure-resistance sealing on the two drilled holes; connecting fracture equipment with the fracture drilled hole, injecting pressure water under the pressure not higher than 3MPa into the fracture drilled hole, performing hydraulic fracture on the fracture drilled hole for 10 minutes, then shutting off a water pump and stopping hydraulic fracture; starting a gas booster to perform gas-phase fracture on the fracture drilled hole, shutting off the gas booster when the pressure reaches 3MPa and stopping gas-phase fracture; repeating the same procedure by multiple times, stopping hydraulic fracture when water flows out of the water guide hole distanced from one side of the fracture drilled hole, continuing gas-phase fracture and finishing gas-phase fracture when water stops flowing out of the water guide hole or gas flows out; connecting the fracture drilled hole and the water guide hole into a gas drainage pipe network and draining the gas. The method has the advantages that the problem that water remains after single hydraulic fracture and prevents gas from being released and desorbed can be effectively solved, internal fracture of the coal can be developed sufficiently, and the gas permeability of the coal seams and a gas drainage effect can be improved.

The present invention features processes of making tablets having reduced internal fractures. In one aspect, the processes comprise the steps of (1) compressing a pre-tabletting material in a die to form a tablet, where an internal surface of the die is lubricated with at least one lubricant and the pre-tabletting material comprises at least one therapeutic agent and at least one pharmaceutically acceptable polymer; and (2) ejecting said tablet from said die. In another aspect, the processes employ a granular or powdery pre-tabletting material which comprises at least one therapeutic agent and at least one pharmaceutically acceptable polymer, wherein 90% of the particles in the pre-tabletting material are smaller than 400 μm.

An object of this invention is to get a circuit board and a semiconductor module with high endurance against thermal cycles, and which is hard to be broken under thermal cycles, even if thick metal circuit board and thick metal heat sink are used, corresponding to high power operation of semiconductor chip. This circuit board comprises, an insulating-ceramic substrate, a metal circuit plate bonded to one face of the insulating-ceramic substrate, a metal heat sink bonded to another face of the insulating-ceramic substrate, wherein (t12−t22) / tc2 / K<1.5, here, thickness of the insulating ceramics substrate is tc, thickness of the metal circuit plate is t1, thickness of the metal heat sink is t2, and internal fracture toughness value of the insulating ceramics substrate is K.

The continuous carbon fiber reinforced composite material for bone repair is prepared with continuous carbon fiber, continuous carbon fiber felt or continuous carbon fiber, cloth through soaking in methyl methacrylate monomer or pre-polymer and subsequent extruding or bulk molding. The composite material of the present invention includes methyl methacrylate and carbon fiber, and the carbon fiber content is 20-80 wt%. The composite material may be used as the external fracture fixing material, internal fracture fixing material and bone repairing material. The composite material has the features of light weight, no interference on NMR examination and excellent biocompatibility. It may be implanted inside life body without negative effect on tissue, blood, etc.

The invention discloses an ultrahigh-pressure hydraulic device integrating drilling, reaming and cutting. The ultrahigh-pressure hydraulic device comprises a drilling machine, a rotary water tail, a drill pipe, a rubber pipe, a drill bit, a water pump and a water tank, wherein the drill pipe is mounted on the drilling machine and driven to rotate by a rotating machine, and the drill bit is fixed at the front end of the drill pipe; the rubber pipe is connected to the rear end of the drill pipe through the rotary water tail; the water pump is connected between the water tank and the rubber pipe and is used for supplying water into the drill pipe and the drill bit through the rubber pipe. The ultrahigh-pressure hydraulic device integrating drilling, reaming and cutting has the advantages that low-pressure drilling, medium-pressure reaming and high-pressure seam cutting are combined, drilling, reaming and seam cutting are integrated, coal free face is increased, coal internal fracture is increased, sufficient pressure relief and permeability increasing of coal are achieved, gas release difficulty is improved, the effective influence range of drilling is increased, gas extraction rate is increased evidently, extraction drilling construction quantity is reduced greatly, and the device is simple to operate, high in efficiency, evident in application effect and worthy of popularization and application.

The invention discloses an acoustic emission monitoring method used for recognizing a rock slope glide plane. A waveguide rod array is arranged inside a rock slope; one waveguide rod embedded in a monitoring hole is filled with 0.1 m thick of cement mortar every other 3 m length of the waveguide rod; an acoustic emission sensor is installed at the end, on the ground, of each waveguide rod; acoustic emission signals generated from rock internal fractures are sent to cement mortar filling parts and then to the waveguide rods; the sensors at the ends of the waveguide rods receive the signals, and finally transmit the signals to an indoor wireless receiving base station through a wireless transmission device; positions, where the signals come from, of the waveguide rods can be fast determined through data analysis and marked with circles; and the trend of the glide plane can be inferred by connecting points with the densest circles on the waveguide rods. According to the acoustic emission monitoring method used for recognizing the rock slope glide plane, a large amount of workload of conventional slope monitoring can be omitted, all-weather automatic recording of the slope can be achieved and are not affected by the climate and weather, and reliable quantitative evaluation can be made on the glide trend of the slope.

The invention discloses a laboratory staged hydraulic fracturing test method for large-size natural rock. The method comprises the following steps: 1) selecting natural rock, processing the rock into a standard-size test piece, drilling a hole of desired depth in an end face of the test piece, and cutting multiple ring grooves in the drill-hole, wherein a cavity between the ring grooves is a glue injection cavity; 2) placing a liquid injection pipe at a predetermined ring groove, filling the ring groove with coarse sand, filling the glue injection cavity with glue, sealing two ends of glue with foraminous separator plates until the glue is solidified; 3) repeating the Step 2; 4) placing the standard test piece onto a test rack, connecting the liquid injection pipe, applying three-dimensional confining pressure, and carrying out a staged fracturing test; and 5) unloading three-dimensional confining pressure off the standard test piece, dismounting the liquid injection pipe, and sectioning the standard test piece to observe the internal fracture morphology so as to end the test. The method provided by the invention can be adopted to carry out a staged fracturing test on natural rock under laboratory conditions so as to obtain fracture morphology under experimental conditions.

The invention provides a preparation method for a navigation template for guiding implantation of an internal fracture fixation steel plate. The preparation method comprises the following steps: (1), analogue simulation, performing three-dimensional reconstruction according to fracture cases to obtain a three-dimension reconstruction fracture model, and performing fracture virtual restoration; on the basis of a virtual restoration model, performing a virtual steel plate internal fixation implantation operation consisting of nail way locking design and virtual steel plate positioning; (2), navigation template design, consisting of (2.1), stable component design of the navigation template, (2.2), stable component obtaining, and (2.3), preparation of a navigation tunnel; (3), three-dimensional printing, printing the navigation template by utilizing a three-dimensional printing apparatus. According to the preparation method for the navigation template for guiding the implantation of the internal fracture fixation steel plate, the navigation template is obtained by utilizing an osseous marker at the circumference of a steel plate implantation position as positioning guiding, so that the preparation is simple; the prepared navigation template can accurately navigate a steel plate during an internal fixation operation, the accuracy is high, and the safety performance is excellent.

The invention discloses coated magnesium alloy bone nails, bone plates and cancellous bone screws. The magnesium alloy consists of Mg of which the purity is more than 99.99wt%, Zn and adding elements, wherein the adding elements refer to one, two or three in Zr, Sr, Ca and Ag; and the magnesium alloy comprises the following components in percentage by mass: 3 percent of Zn, 0.2-1.0 percent of Zr, 0-1.0 percent of Sr, 0-1.0 percent of Ca, 0.0-1.0 percent of Ag and the balance of Mg. The coated magnesium alloy bone nails, bone plates and cancellous bone screws have the advantages that after being subjected to comprehensive treatment, the magnesium alloy bone nails, bone plates and cancellous bone screws have reasonable degradation rate, capacity of promoting new bone growth in the living body and high biocompatibility; particularly, after the bone nails, bone plates and cancellous bone screws are treated by the mixed aqueous solution of hydrofluoric acid and calcium and phosphorus compounds, the corrosion rate can be regulated by virtue of the thickness of the surface fluorides and fluorapatite layer, and the requirement on rigid fixation time of the bone nails, bone plates and cancellous bone screws before internal fracture fixation within 3 months can be met.

The invention provides a dynamic-static loading variable-scale similar material test and multi-field dynamic monitoring analysis system, and relates to the technical field of similar material simulation tests. The system comprises a similar simulation test frame, a dynamic-static loading system, a multi-node dynamic internal displacement response monitoring system, a multi-node dynamic surface displacement digital measurement system, a full-domain whole-process internal fracture evolution monitoring system and a multi-node dynamic stress response monitoring system. The multi-field time-varyingmonitoring and analysis of the stope overlying rock structure characteristics and migration law, the rock fracture development degree, the ground surface settlement characteristics, the mine pressure, the mine pressure display, and the like can be realized in a dynamic-static loading variable-scale similar material test; the problems in collection and vectorization processing of multi-field multi-node dynamic data of full-domain and whole-process stress, displacement, fracture and the like in the existing similar material test can be solved; the real-time monitoring and analysis of the internal deformation damage characteristics and a stress evolution law of a rock-soil model under the action of dynamic and static loads are realized; and therefore, the system has important practical research guiding values.

The invention relates to the technical field of ball fracturing sliding sleeves, in particular to a rotary control stepless ball fracturing sliding sleeve. The rotary control stepless ball fracturing sliding sleeve comprises an upper connector, a sliding sleeve body, a lower connector, an inner sliding sleeve and a rotary control sliding sleeve. The outer side of the lower portion of the upper connector and the inner side of the upper portion of the sliding sleeve body are fixedly installed together. The inner side of the lower portion of the sliding sleeve body and the outer side of the upper portion of the lower connector are fixedly installed together. The lower portion of the inner sliding sleeve and the sliding sleeve body are fixedly installed together through shear pins. Two or more internal fracturing holes are distributed in the upper portion of the inner sliding sleeve along the circumference. The rotary control stepless ball fracturing sliding sleeve is reasonable and compact in structure and convenient to use, stepless ball fracturing is achieved, technical support is provided for opening all fracturing reservoirs through fracturing balls in the same size, the number of fracturing layers is not restrained by the diameters of fracturing balls, pressure loss at ball seats with different diameters in the existing fracturing operation process is reduced, ball seat grinding and milling procedures are omitted, fracturing efficiency is improved, fracturing cost is reduced, and the rotary control stepless ball fracturing sliding sleeve can be applied to underground fracturing production increase operation.

The invention provides an evaluation method for fracturing and anti-reflection effects of a low-permeability coal and rock mass under a microscopic scale. A set of system for visually, accurately and quantitatively evaluating the fracturing and anti-reflection effects of a coal and rock mass under a micro-scale is established by combining a crack propagation gauge (CPG) and an ultrasonic detection system with CT scanning and image processing software, pore characteristic analysis system software (PCAS) and space three-dimensional reconstruction software. According to the evaluation method disclosed by the invention, comprehensive, overall and visual three-dimensional observation can be performed on internal fractures of a fractured coal and rock mass from different angles, the shape, size, position and distribution of the internal fractures of the coal and rock mass are deeply analyzed, so that the internal fractures are transparent, the spatial distribution form and quantitative characteristics of the internal fractures of the fractured coal and rock mass are further analyzed, and the problems of coal seam fracturing technology optimization and construction parameter optimization are further solved.

The invention discloses an asymmetric anchor bolt support test table and test method of a gob-side entry driving roof at tunnel top; a test table wall is composed of an inner nesting structure and anouter nesting structure and capable of realizing horizontal and vertical stretching and suitable for requirements of various large and small tests; the matching is performed according to the strengthobtained through the conventional rock dynamic test and the similar analog test requirement to obtain the transparent rock material capable of satisfying the strength commuted strength through similarity ratio. Through the method disclosed by the invention, the support research on the gob-side entry driving asymmetric roof at the tunnel top can be realized, the entity model top edge is an arc, andthe test can accomplish the asymmetric anchor bolt support test, that is, the lengths of the left anchor bolt and the right anchor bolt are unequal; the growth condition of the internal fracture of the rock under the asymmetric anchor bolt support can be observed through the transparent rock, and a black box problem which cannot be observed in the rock is overcome. In consideration of the influence on the top load by a goaf gangue being at the upper part of the gob-side entry driving at the tunnel top, the research on the asymmetric anchor bolt support mechanism of the asymmetric surroundingrock of the gob-side entry driving at the tunnel top at the staggered position is realized.

The invention relates to a pre-forming technology of a high-strength aluminum alloy stock, which can effectively solve the weaknesses that the internal fracture and surface coarse grain caused by adopting the free forging stretching, can reduce the pre-forming forming heating number, can improve the production efficiency, can reduce the energy consumption and can reduce the production cost. The pre-forming technology comprises the following steps: (1) feeding: the feeding length is calculated according to an equal volume conversion principle; (2) heating: rod material is heated to a forging temperature and is heat preserved; (3) stretching: the small-diameter circular part on the middle part of the stock after being heated is stretched and formed; (4) heating: the stock after being stretched is melted down and heated to the forging temperature and is heat preserved; (5) blocker-type forging upsetting: two ends of the stock are undertaken the upsetting processing through a forming die. The production method is characterized in that the stretching adopts a rolling forging stretching process.

The invention relates to an embedded type ultrasonic sensor arranged in a cement concrete structure. In the embedded type ultrasonic sensor, a front sound wave intensifier (2) is arranged in the middle part of a matching layer (1), and a PZT piezoelectric ceramic wafer (3) is arranged behind the front sound wave intensifier (2). A back lining layer (4) is arranged behind the PZT piezoelectric ceramic wafer (3). A packaging layer (5) is arranged on the periphery of the back lining layer (4). The PZT piezoelectric ceramic wafer (3) leads out an electric signal through a wire (7). The outlet endof the wire (7) is provided with a compression spring (9) and a tail-end wire protector (10). A shielding wire (6) is arranged on the outer layer of the wire (7). According to the invention, the prepared ultrasonic sensor is good in compatibility with the cement concrete. Meanwhile, the ultrasonic sensor is good in directivity, strong in signal strength and high in sensitivity. The packaging material is relatively good in waterproof performance and excellent in ageing resistance. The embedded type ultrasonic sensor, which has the same service life with the cement concrete, can be used for thelong-term and dynamic monitoring of the hydration hardening process of the cement concrete and the internal fracture damage monitoring of the cement concrete structure on active service.

By increasing the quantity of resin binder of at least one of conductive paste and ceramic green sheet, adhesion between conductive film and the ceramic green sheet is improved when an intaglio filled with the conductive paste is hot pressed on the ceramic green sheet. As a result, transfer failure at intaglio transfer is removed and internal fracture of the ceramic green sheet is suppressed. Also, by coating an adhesive layer on an intaglio filled with conductive paste, adhesion with ceramic green sheet is improved and transfer failure at intaglio transfer is suppressed.

The invention relates to an internal fracture fixator which comprises locking screws, a connecting rod and fastening nuts. The traditional operational process of internal fracture fixation is changed by the internal fracture fixator, surgical operation is simplified, the direct contact area proportion of the internal fracture fixator with skeletons of four limbs of a patient is low, and the internal fracture fixator is free of contact with the skeleton at a fracture position of the patient, so that interference on the fracture position and interference on blood supply to bones below the internal fracture fixator are avoided, and the internal fracture fixator is beneficial to fracture healing; a system adopts a corner fixation mode, a fixation effect is good, and probable pulling-out and loosening of the screws and the like are avoided; minimally invasive surgery can be carried out via a subcutaneous tunnel, traumas are small, bleeding is rare, recovery is fast, and complications can be greatly reduced; and the fracture position can be pressurized again after the patient is subjected to fracture fixation, so that fixation is stable, and fracture healing is facilitated.

The invention provides high-intensity multi-degradation-resistant-protection degradable internal fracture fixation materials and a preparation method of the materials. The internal fracture fixation materials are formed by a degradable braided rope structure and a surface-layer multi-hole structure. The preparation method of the high-intensity multi-degradation-resistant-protection degradable internal fracture fixation materials includes the steps of preparing the braided rope structure through degradable fibers with degradation-resistant protective layers on the surfaces, and then coating the surface of the braided rope structure by degradation-resistant materials to form a multi-hole surface layer. According to the high-intensity multi-degradation-resistant-protection degradable internal fracture fixation materials, the biocompatible degradable materials are completely used, the special inner supporting braided rope structure and multi-degradation-resistant protections on the surface enable a support to have high mechanical intensity and slow intensity losses and also have good biocompatibility and excellent bone conduction performance, and the problems that the internal fracture fixation materials in a use process are not high in intensity, rapid in intensity loss, poor in bone conduction performance and the like are solved.

The invention relates to a method for monitoring and determining the position of an internal fracture surface of a rock and soil body based on a multi-point displacement meter. The method comprises through the analysis of the data of multiple horizontal multi-displacement meters, screening out two adjacent measurement points with a maximum cumulative absolute displacement per unit length between two measurement points of each displacement meter, and preliminarily determining that the fracture surface is between the adjacent measurement points; by using the fracture surface of an area where three displacement meters are located as a reference plane and by supposing that a reference fracture surface is planar and the displacement variation values at both ends are the same, establishing an equation that includes the coordinates of the intersection point between the fracture surface and the displacement meter, solving the coordinates of the intersection point; by using the coordinates ofthe two ends of the reference fracture surface as a reference, successively positioning the intersection points of the rest fracture surfaces and the displacement meters; solving the coordinates of the intersection points of all the displacement meters and the fracture surface; and obtaining the specific location of the entire fracture surface by connecting the intersection points. The method canquickly determine the specific location of the fracture surface, and has great significance in the stability evaluation and reinforcement design of slopes.

The invention discloses a fracture internal fixing device. The fracture internal fixing device comprises: a steel plate and fixing nails, wherein the steel plate is fixedly connected with a bone through the fixing nails; a plurality of stress sensors, which are fixedly arranged on the outer surface of the steel plate and annularly distributed around the fixing nails; a built-in acquisition module,which is electrically connected with the plurality of the stress sensors; a built-in battery, which is arranged on the outer surface of the steel plate and is electrically connected with the stress sensors and the built-in acquisition module; and an external display, which is in wireless connection with the built-in acquisition module and is used for displaying data of the stress sensors. According to the invention, through arrangement of the stress sensors on the steel plate, the stress value of the steel plate can be detected and further visually displayed through the external display, so medical staff can conveniently judge whether the steel plate is broken or not in advance according to the change of the stress value to take preventive measures in advance; meanwhile, the steel plate taking-out opportunity can be roughly judged, and the treatment effect and efficiency are improved.

The invention belongs to the technical field of underground stope simulation indoor tests, and particularly relates to a rock mass internal fracture visualization three-dimensional similar model device, which comprises a horizontally arranged rectangular base platform, a test box and a loading portal, the test box is internally compacted and filled with a simulation rock mass, and the test box isarranged below the loading portal, and is arranged on an experiment site in a rolling mode. The loading portal comprises a horizontal top cross beam and a pair of stand columns. A pair of groove seatsare correspondingly mounted on the opposite sides of the pair of stand columns, a pair of jacks are correspondingly mounted on the pair of groove seats, and a plunger at one end of each jack makes contact with the side face of the test box body; a plunger at one end of the third jack is in contact with the middle part of the lower end surface of the top cross beam; three or more rubber inflationcore mold holes which are formed in a staggered mode are horizontally formed in the upper portion of the test box body in a penetrating mode, and a rectangular stope excavation opening is formed in the lower portion of the test box body. The rock mass fracture development and evolution characteristics and the experimental process under the action of the external load can be visually displayed in real time.

The invention discloses a tibia locking nail plate external fixator and a using method thereof. The tibia locking nail plate external fixator comprises a fixing plate and locking screws, wherein screwholes and threads are evenly formed in the fixing plate; the locking screws are installed in the screw holes, and the locking screws can be screwed into the screw holes for locking and fixing; the surface, directly facing and parallel to the front inner side of the tibia, of the fixing plate is an inner bottom arc surface; and the side surface, parallel to the front edge of the tibia, of the fixing plate is a peripheral arc surface consistent with the radian of the tibial axis. The external fixator has the advantages of serving as both an external fixator (external fracture fixation) and a locking bone fracture plate (internal fracture fixation), the tibia locking nail plate external fixator is used for treatment of a tibial distal fracture operation, closed reduction or minimally invasive incision reduction, the minimally invasive concept is embodied, the rapid rehabilitation surgery concept is embodied, and the fixator has high biomechanical stability through biomechanical measurement.

The invention provides a woven film, a woven bag and a preparation method, aiming at solving the problems that an internal fracture fixator only plays a role in fixing and cannot provide space for bone tissue growth in time so as to achieve the aims of guiding and efficiently promoting fracture healing. The woven film is characterized in that the woven film comprises a core layer, a middle layer and an outer layer, wherein the core layer is made of a non-degradable high polymer material, and the middle layer and the outer layer are formed by mixing and weaving a degradable material and the non-degradable high polymer material; the degradation time of the degradable material used by the middle layer is greater than or equal to the degradation time of the degradable material used by the outer layer; and the woven bag adopts a cylindrical woven film with openings at two ends and comprises a first port and a second port, wherein the first port seals and fixes the opening at one end of thewoven film, and the second port seals and fixes the opening at the other end of the woven film and has a loosening effect.

The invention discloses a method for evaluating the development degree of microscopic fractures of shale based on a nanoindentation experiment. The method comprises the following steps: firstly, carrying out a nanoindentation experiment, and drawing a fitting curve and a theoretical curve of H / Er and Ue / Ut according to obtained related data; calculating a vertical distance from the indentation point to the theoretical curve and an average value of the vertical distance; calculating a first evaluation value; calculating a second evaluation value according to the slope of the fitting curve and the slope of the theoretical curve; then calculating the average value of the vertical distances within the threshold range, and calculating a third evaluation value; and finally, calculating a fracture development degree evaluation value according to the three evaluation values, evaluating the shale microcosmic fracture development degree , and judging that the larger the fracture development degree evaluation value is, the better the shale microcosmic fracture development degree is. The problems of complex internal fracture observation means, long period and difficulty in in-situ monitoring in the existing nanoindentation technology are solved, and the internal fracture of the sample can be evaluated only by acquiring displacement load data through an in-situ indentation experiment.

A cylindrical tension band pressurizing fixing apparatus for patellar fracture mainly comprises an outer sleeve, an inner rod, a primary tension band and a secondary tension band. The outer sleeve and the inner rod can be axially and freely sleeved together in a pluggable manner, and the primary tension band and the secondary tension band are sleeved on the outer sleeve and the inner rod. The cylindrical tension band pressurizing fixing apparatus for patellar fracture is a human body internal fracture inner fixing apparatus mainly used for patella transverse fracture or slightly comminuted patella fracture. The distance between the outer sleeve and the inner rod is shortened by the aid of tensioning of the tension bands, so that two fracture ends are fixed in a pressurized manner and are prevented from moving laterally, deformity of the two fracture ends is avoided, and fracture stability is maintained. Fracture boundaries can contact tightly, friction force is increased, fracture stability is increased, joints of a patient can be trained early, and fracture union is promoted.