48 results about "Rock blasting" patented technology

A method for predicting in-situ leaching effects of sandstone-type uranium mining deposits after blasting is provided, which comprises: based on a finite element analysis platform, establishing an HJC rock-blasting constitutive model, and carrying out a blasting numerical simulation; calibrating a cloud map of blasting crack damage by using a Kriging interpolation algorithm; establishing a COMSOL multiphysics model; establishing a coupling interface between the COMSOL multiphysics model and PHREEQC based on MATLAB, and optimizing a cycle duration and a time step; performing a geochemical reaction calculation and saving results, running COMSOL files, and inputting the results of geochemical reaction calculation into PHREEQC to obtain a dynamic cyclic iterative simulation; dynamically correcting migration coefficients of uranyl complexes by integrating an LSTM neural network, and stopping the cycle to output multi-scale dynamic simulation results of migration of uranium.

The invention provides a rock porosity adaptive modeling and blasting crack expansion calculation method based on key-type near-field dynamics, and the method comprises the steps: constructing a unified near-field dynamics model containing pore adaptive generation and blasting dynamic response; dynamic simulation of the rock blasting process is realized through pore distribution control, blasting load time history application and crack evolution judgment, and crack initiation, expansion and penetration rules can be accurately reproduced while the calculation stability is ensured. By introducing a pore adaptive discrete algorithm, the construction of rock models under different porosity conditions is automatically realized, and the initiation, expansion and penetration processes of cracks in the rock mass are accurately predicted in combination with near-field dynamics mechanical calculation under the action of an explosion load. According to the method, the heterogeneous characteristic of the rock and the discontinuous effect of the blasting load can be considered at the same time under a unified dynamic framework.

The invention discloses a rock blasting load transfer and throwing simulation method which comprises the following steps: S1, acquiring field parameters of a target blasting project, the field parameters comprising rock mass mechanical parameters, explosive parameters, blast hole parameters and charging structure parameters; and S2, based on the field parameters, constructing a three-dimensional explosive-rock calculation model by adopting pretreatment software, dividing grids, importing the grids into finite element software, setting a material model, a state equation and boundary conditions, and simulating an explosive detonation process. The limitation of a single numerical value method is solved; quantitative analysis and accurate prediction of rock blasting lumpiness are achieved, inclined joints are adopted in the discretization process, actual rock mass joint distribution is better fitted, and the reliability of a simulation result is improved; bulk rocks and excessive crushing phenomena are effectively reduced, the explosion energy utilization rate is improved, the engineering cost is reduced, and a scientific basis is provided for explosion design of projects such as mining and water conservancy and hydropower.

The invention provides an FDEM-based rock blasting process simulation method and system considering blasting gas, and the method comprises the steps: building a jointed rock blasting numerical model comprising a blast hole, a rock mass and a joint network based on a finite element-discrete element coupling method; setting a static-dynamic unified boundary condition for the jointed rock mass blasting numerical model, and applying a blasting stress wave load; constructing an explosion gas action model, and dynamically calculating a transient explosion cavity area and transient gas pressure; transient gas pressure is coupled and applied to the boundary of the crack and the surface of the isolated rock; and operating the solver, simulating the whole process from stress wave propagation, joint attenuation effect, crack initiation and propagation to blasting gas driven crushing and throwing, and analyzing the result. The method provided by the invention overcomes the defect that the existing method is difficult to simultaneously and accurately characterize the joint effect and the action of the blasting gas, obviously improves the authenticity and reliability of the simulation of the blasting rupture process of the jointed rock mass, and provides an effective tool for blasting mechanism research and engineering optimization design.

The invention provides a rock mass blasting parameter inversion method, electronic equipment and a storage medium, and belongs to the technical field of blasting parameter design. The method comprises the steps that the damage tolerance and first blasting parameters of a rock mass are determined; the explosion process of the explosive is divided into a first stage dominated by stress waves and a second stage dominated by detonation gas. In the first stage, damage factors of the rock mass under stress wave damage are calculated. In the second stage, based on the damage factors, the crack expansion degree of the rock mass under the explosion gas damage is calculated, the damage prediction radius of the rock mass is obtained, and a damage prediction model is constructed. And calculating a first damage radius of the rock mass under the first blasting parameter based on the damage prediction model. When the first damage radius is smaller than or equal to the damage tolerance, the first blasting parameter is output, otherwise, the first blasting parameter is adjusted to be a second blasting parameter, and when the second damage radius is smaller than or equal to the damage tolerance, the second blasting parameter is output. The inversion method provided by the invention can improve the precision degree of controlling the blasting damage range.

The invention discloses a rock blasting lumpiness simulation and grading prediction method based on image processing, and the method comprises the following steps: S1, constructing a three-dimensional numerical calculation model by adopting pretreatment software HYPERMESH based on the on-site actual rock mass mechanical parameters and blasting design parameters, dividing grids, and importing the grids into finite element software LS-DYNA; the on-site actual rock mass mechanical parameters comprise rock density, elastic modulus, Poisson's ratio, yield strength and tangential modulus, and the blasting design parameters comprise blast hole spacing, row spacing, charging structure, explosive type and charging amount. According to the invention, through combination of finite element simulation and image processing, rock lumpiness simulation and grading prediction before blasting are realized, and a prediction result is highly matched with a field test; blasting parameters can be optimized in advance, secondary blasting or excessive smashing is avoided, and the engineering cost is reduced; the operation process is standardized, software is easy to obtain, engineering popularization and application are facilitated, and the method has great significance in improving the rock blasting fine design level.

The embodiment of the utility model discloses a joint-cutting fracturing device assembly, relates to the technical field of rock blasting, and can effectively improve the positioning precision of a joint-cutting fracturing device during construction and installation. The assembly comprises a joint-cutting fracturing device, an identifier, a lifting rope and a distance-measuring illumination instrument, the kerf fracturing device is provided with a tubular structure, and a kerf is formed in the pipe wall of the tubular structure. The mark is used for being arranged at the first end of the joint cutting fracturing device; the lifting rope is used for being connected with the joint-cutting fracturing device so as to lift the joint-cutting fracturing device into a blast hole; the distance measuring illuminator is used for measuring the distance of the joint cutting fracturing device and can provide illumination. The method is suitable for the slope boundary presplitting blasting scene of the surface mine.

This invention discloses a blasting device and a rock blasting method, relating to the field of rock blasting technology, which can improve construction efficiency. The blasting device includes a shell, a first shaped charge liner, and a second shaped charge liner, the first and second shaped charge liners being disposed opposite to each other; both the first and second shaped charge liners are parabolic metal liners; the shell includes a first outer wall and a second outer wall, the first and second outer walls being disposed opposite to each other, the first shaped charge liner being fixedly connected to the left side of the first outer wall and the left side of the second outer wall respectively, and the second shaped charge liner being fixedly connected to the right side of the first outer wall and the right side of the second outer wall respectively; the cavity formed by the first outer wall, the second outer wall, the first shaped charge liner, and the second shaped charge liner is used to store explosives. This invention is applied to rock blasting scenarios.

The application provides a method and system for determining millisecond millisecond differential blasting time of frozen rock, which can reasonably determine the millisecond differential blasting time of frozen rock in cold regions and accurately predict the blasting effect. The method comprises the following steps: step 1, considering the influence of temperature on wave velocity, calculating the stress wave propagation velocity of frozen rock, wherein T represents the temperature of rock; A, B, C and D are parameters related to the longitudinal wave velocity of rock, which are obtained by fitting the wave velocity data of rock at different temperatures; step 2, calculating the frozen rock blasting millisecond differential time based on the stress wave propagation velocity. The system comprises: a wave velocity acquisition unit, which considers the influence of temperature on wave velocity and adopts the stress wave propagation velocity of frozen rock; a blasting millisecond differential time calculation unit, which calculates the frozen rock blasting millisecond differential time based on the stress wave propagation velocity; an input display unit, which inputs the operation instruction of the operator and displays the corresponding information according to the operation instruction; and a control unit, which is in communication with each unit and controls the operation of each unit.

The invention discloses an ore rock mass blasting displacement field testing method based on 3D-DIC. The method comprises the following steps that S1, an on-site blasting 3D-DIC in-situ testing system is built, wherein the testing system comprises an ultra-high-speed image acquisition unit, a synchronous control unit, a data transmission and storage unit, a safety protection unit and a power supply unit; the ultra-high-speed image acquisition unit adopts two ultra-high-speed cameras which are connected through a coaxial cable to achieve synchronous shooting, the cameras are arranged at the position 180-185m away from an ore rock blasting test slope, the distance between the cameras is 30-40m, and the included angle between the cameras is 12-15 degrees. According to the invention, the problem that test equipment is damaged by an on-site blasting environment is solved, and stable test under severe conditions is realized; three-dimensional displacement field data in the whole process of ore rock mass blasting can be obtained, and the blank of on-site blasting three-dimensional displacement testing is filled up; reliable data support is provided for blasting parameter optimization and new free surface evolution analysis, and the safety and efficiency of blasting engineering are improved.

The utility model discloses an explosive filling rod for ore rock blasting, which belongs to the technical field of explosive filling rods, and comprises a connecting plate, the bottom of the connecting plate is fixedly connected with a handle, one side of the top of the connecting plate is fixedly connected with a supporting piece, one side of the outer wall of the supporting piece is fixedly connected with a material guide pipe, and the other side of the outer wall of the supporting piece is fixedly connected with an explosive filling rod. Two fixing plates are fixedly connected to one side of the outer wall of the connecting plate, a feeding assembly is installed between the two fixing plates, and a feeding port is formed in the top of the material guiding pipe. By arranging the feeding assembly, the amount of explosives entering the filling rod each time can be accurately controlled, it is ensured that the amount of the explosives filled each time meets the blasting design requirement, and the explosive filling efficiency is improved. By accurately metering and controlling the feeding amount, the influence on the explosive performance and the blasting effect due to too much or too little feeding can be avoided, the explosive filling process can be operated within a relatively safe distance by arranging the pushing assembly, and the safety risk caused by direct manual contact with the explosive is avoided.

The invention relates to the technical field of coal mine safety, and provides a deep well roadway surrounding rock blasting measure optimization design method and system. According to the determined residual mine earthquake energy of the migration of the key layer of each layer covering the target working face to the roadway supporting system and the theoretical impact resistance of the roadway supporting system of the target working face, determining a threat factor of the migration of the key layer of each layer to the roadway supporting system so as to identify a top plate blasting layer of the target working face; and then, a construction path and blasting parameters of target working face roof blasting are generated based on the recognized roof blasting position, and threat factors of migration of all key layers covering the target working face to a roadway supporting system are cyclically updated. Therefore, the impact resistance of a roadway support system is constrained, the'disaster-inducing-disaster-bearing 'matching of the blasting horizon is realized, the quantitative screening of the target blasting horizon is realized, the identification efficiency and accuracy are improved, and the rock burst and mine earthquake risks caused by misjudgment or missed judgment are reduced.

The invention is suitable for the technical field of geotechnical engineering blasting, and provides a rock mass blasting parameter determination method based on sound wave velocity, hole depth and explosive load and a measuring plate, the method comprises the following steps: firstly, through multiple rounds of blasting tests, obtaining a data sample set of a sound wave longitudinal wave velocity Vp before blasting, a hole depth h of a blasting hole, an explosive load Q, a wave velocity loss rate eta and a relaxation depth d; then, on the basis of the data sample set, Vp and h serve as variables, and a visual measuring plate of the explosive load Q is constructed through triangular meshing and isoline tracking; before actual blasting, according to the actually measured Vp before blasting and the designed hole depth h, the optimal explosive loading amount can be rapidly determined by searching the measuring plate. The method solves the problem that in the prior art, the explosive load cannot be directly and accurately determined before blasting, quantitative design and accurate control of blasting parameters are achieved, and the method has the advantages of being efficient, visual, objective and capable of being dynamically optimized.

The utility model discloses a movable protective shed for earth-rock blasting of a foundation pit, which realizes smooth movement of a protective shed main body by arranging rail wheels matched with a rail frame at the bottom of a supporting structure, greatly simplifies the moving process of the protective shed, reduces the use of manpower or machinery, and reduces the moving cost and time cost. The rail frame is fixedly installed on the top beam, a stable foundation is provided for movement of the protective shed, an operator only needs to control the protective shed body to move along the rail, position adjustment can be easily achieved, operation convenience and efficiency are improved, and the protective shed can be conveniently and rapidly moved along with blasting operation. The position of the protective shed can be rapidly adjusted according to the position of a blasting point so as to meet different blasting protection requirements, so that the protective shed can be rapidly and accurately moved to a designated position, timely and effective protection is provided for blasting operation, and the overall operation efficiency is improved.

The utility model discloses a rock static blasting device, which belongs to the technical field of rock blasting and comprises a body, two clamping blocks are fixedly connected to the outer wall of the body, two connecting blocks are fixedly connected to the outer wall of a mounting cylinder, fixing assemblies are mounted on the two connecting blocks, and the fixing assemblies are fixedly connected to the outer wall of the mounting cylinder. According to the utility model, the transportation assembly is arranged, so that the precise parts in the equipment can be prevented from breaking down due to collision with rocks, meanwhile, a stable transportation environment can be provided for the precise parts, and the influence of collision on the precise parts is reduced; by arranging the fixing assembly, all parts of the equipment can be firmly fixed to the positions of the equipment, mutual collision between the parts is avoided, and therefore it is guaranteed that the equipment can be normally used when transported to the construction site.

The utility model relates to a gas blasting mining device, which belongs to the technical field of ore body rock blasting mining devices, and comprises a protective bag, a paper block, a gas filling pipe, a detonating lead and an exhaust pipe, one end of the protective bag is a closed end, and the other end of the protective bag is a necking end; the paper block comprises a plurality of pieces of first roll paper and second roll paper which are alternately inserted in the protective bag, and the lengths of the plurality of pieces of first roll paper are greater than those of the plurality of pieces of second roll paper; one end of the inflation tube sequentially penetrates through the first roll paper and the second roll paper, a plurality of inflation holes are formed in the corresponding tube wall of the inflation tube, and the other end of the inflation tube penetrates out of the necking end in a sealed mode. According to the utility model, the plurality of pieces of first roll paper and the plurality of pieces of second roll paper are alternately inserted into the protection bag, and then the inflation tube sequentially penetrates through the plurality of pieces of first roll paper and the plurality of pieces of second roll paper, so that the length of a paper block can be increased, the assembly time can be shortened, bending transportation of a blasting mining device is facilitated, filling gaps are increased, and the filling amount of a liquid bag of the protection bag is increased; the ecological environment is protected, and the use safety is improved.

The invention discloses a blasting process simulation method and system based on bidirectional fluid-solid coupling, and relates to the technical field of rock blasting. The method comprises the following steps: firstly, modeling a solid computational domain by adopting a discrete element method, and modeling a fluid computational domain by adopting a finite volume method; and then applying a dynamic load to simulate an initial crack in a shock wave stage, mapping crack information to a fluid computational domain grid, dynamically updating local permeability, solving a compressible gas diffusion equation, applying a pressure field to the surface of a solid computational domain particle through an interpolation method, and driving the crack to continuously expand. A fluid-solid two-way feedback mechanism covering detonation gas and rock is established, through closed-loop coupling of crack-permeability-gas pressure-new crack, the driving effect of gas at the tip of the crack is accurately captured, the experimental crack form can be accurately reproduced, and the experiment precision is improved. And the influence of the initial air pressure on the crushing range, the crack number and the damage mode can be quantitatively analyzed, and the method is suitable for blasting optimization design under the condition of high-gas-yield explosives.

The invention discloses a rock blasting crack propagation prediction method, system and equipment and a medium, and relates to the technical field of rock crack prediction. The rock blasting crack propagation prediction method comprises the following steps: acquiring rock mass state data of a plurality of measurement points of a target rock mass area, and performing preprocessing; constructing a state distribution field of the target rock mass area based on the preprocessed rock mass state data of the plurality of measurement points; the state distribution field of the target rock mass area is input into the pre-trained crack propagation prediction model for prediction analysis, and a crack propagation prediction result is obtained.According to the method, the three-dimensional state model containing the multiple rock mass physical distribution fields is constructed and input into the pre-trained crack propagation prediction model, so that the crack propagation prediction result is obtained before blasting implementation; the crack initiation risk, the expansion direction and the expansion rate of each space point in the target rock mass area can be quantitatively predicted, and the hysteresis problem that a traditional method needs to depend on acoustic emission, vibration records and other results to reversely deduce a crack path is solved.

The application discloses a liquid combustible gas-liquid oxygen gas rock breaking device, and relates to the technical field of rock blasting, comprising a blasting tank and an ignition assembly. The blasting tank is internally provided with a first cavity and a second cavity. The first cavity and the second cavity are completely isolated by a partition. The first cavity is used for containing liquid oxygen and combustible material, the second cavity is used for containing liquefied combustible gas, and the partition can be damaged under high-temperature conditions and make the first cavity and the second cavity through. The ignition assembly is used for igniting the combustible material in the first cavity. The application utilizes the combination of liquefied combustible gas and liquid oxygen, and the physical phase change of liquid and the chemical reaction of gas to jointly act on the rock breaking technology, and greatly improves the energy generated by gas blasting.

The application discloses a kind of asymmetric decoupling tunnel smooth blasting method, comprising: obtaining the surrounding rock classification data of target area and initial ground stress distribution and optimizing low-damage test blasting scheme;Based on the low-damage test blasting scheme, drilling operation is carried out, and asymmetric decoupling fine charging casing device is assembled by selecting specific pre-charging site and assembling peripheral hole pre-charging casing device;The surrounding hole is filled by the peripheral hole pre-charging casing device, and the remaining blast hole is filled by using continuous charging method, and is blocked after filling is completed;Build initiation network, ventilate after initiation and check blasting effect, and iteratively optimize test blasting scheme according to damage determination result.The application can accurately control the working direction and range of energy of explosives in the surrounding hole during blasting, thereby reducing the disturbance of blasting effect on surrounding rock, reducing the damage degree of surrounding rock blasting, ensuring construction safety, reducing the number of overbreak and underbreak, and greatly improving construction efficiency.

The utility model relates to the technical field of dust fall, and discloses a dust fall structure for earth-rock blasting, which comprises a dust fall vehicle and a recovery mechanism, a support mechanism is arranged in the middle of the top side of the dust fall vehicle, fixing mechanisms are fixedly arranged on four sides of the top side of the dust fall vehicle, and two limiting mechanisms are fixedly arranged on the top side of the support mechanism. Two clamping mechanisms are fixedly arranged on the top side of the supporting mechanism, a dust falling machine is fixedly arranged on the inner sides of the two clamping mechanisms, the recycling mechanism comprises a collecting frame, a collecting inclined plate is fixedly arranged on the upper portion of one side of the collecting frame, and confluence pipelines are fixedly arranged on the lower portions of the two sides of the collecting frame. The water flow dripping from the nozzle of the dust falling machine is collected through the collecting mechanism, and the water flow is fed into the water bucket for supplying water to the dust falling machine again through the conveying pipe and the recycling pipeline, so that the water resource utilization rate of the dust falling machine is increased, and the one-time dust falling duration of the product is prolonged.

The invention relates to a hard rock shallow hole blasting method for a deep foundation pit. The method comprises the steps that protective layers are arranged on the inner sides of support piles on the two transverse sides of the foundation pit; damping holes are formed in the two transverse sides of the foundation pit according to preset damping hole construction parameters; the hard rock between the protective layers located on the two transverse sides is subjected to deep layering and longitudinal and transverse partitioning; according to the blasting parameters corresponding to the different partitions, the single-hole explosive charge and the total explosive charge are determined; setting blasting holes in array distribution according to the blasting parameters, and filling explosives into the blasting holes in combination with the single-hole explosive charge and the total explosive charge; and detonating by adopting a hole-by-hole detonating method to finish hard rock blasting. According to the method, zoning blasting, repeated charging and shallow hole blasting are adopted, blasting parameters are continuously adjusted and optimized according to the blasting effect of each time, damping holes and a micro-vibration blasting area are arranged on one side with dense pipelines in the current situation for buffering, and the single-hole charging amount and the total explosive amount are determined according to the blasting parameters corresponding to different zones; and an expected blasting effect is realized on the basis of ensuring blasting safety.

The invention discloses mine rock blasting drilling equipment, and relates to the technical field of mine rocks, the mine rock blasting drilling equipment comprises a fixed frame plate, a driven gear disc connected with a driving gear disc is arranged on the inner side of the fixed frame plate, and a diamond drill body connected with the fixed plate is arranged below the driven gear disc. The problems that according to traditional blasting drilling equipment, manual rock drilling, pneumatic rock drilling, hydraulic drilling rig and current combination of automation and intelligentization are developed, small holes need to be drilled in advance in the rock drilling operation so that accurate drilling of a drill bit can be ensured, a large amount of broken stone and dust can fly in the rock drilling process, and the drilling efficiency is high are solved. The problems that air is polluted, drilling equipment is damaged, meanwhile, during rock drilling, some broken stones and dust are left in a hole, a drill bit is difficult to go deep to cause blockage, and after rock drilling, due to the fact that the diameter of the hole is small, the broken stones and the dust are difficult to remove, and the blasting effect is reduced during follow-up explosive installation are solved.

This utility model discloses a combined guiding device for directional static blasting of foundation pit rock strata, belonging to the field of foundation pit rock blasting technology. It includes a support plate and an adjusting plate. An adjusting plate is provided on one side of the support plate, and a movable shaft is provided on the side of the adjusting plate near the support plate. The adjusting plate is movably connected to the support plate via the movable shaft. A second sleeve is symmetrically provided at the top of the support plate and is movably connected to the support plate. A second sliding rod is slidably installed inside each of the second sleeves. A second locking pin is provided on the side wall of each of the second sleeves, extending through the second sleeve to the interior of the second sliding rod and threadedly connected to the second sleeve. This utility model not only achieves multiple linkage adjustments to adapt to different operating angles and allows for quick assembly and disassembly of detonators and explosives, facilitating flexible adjustment of the blasting direction, but also improves the flexibility of use and the convenience of assembling and disassembling detonators and explosives.

This disclosure relates to a dynamic optimization method and apparatus for surrounding rock blasting schemes, belonging to the field of blasting effect detection and optimization technology. The method includes: acquiring original surrounding rock image data of a target surrounding rock area; performing object detection on the original surrounding rock image data based on a preset target object detection model to obtain eyehole traces and eyehole detection frames of the eyehole traces in the target surrounding rock area; determining the first trace quantity, eyehole trace morphological characteristics, and spatial distribution characteristics of the eyehole traces based on the eyehole detection frames, and determining the area to be optimized based on the first trace quantity, eyehole trace morphological characteristics, and spatial distribution characteristics; optimizing the current blasting scheme corresponding to the target surrounding rock area based on the area to be optimized to obtain a target blasting scheme, and performing a second blast based on the target blasting scheme. This disclosure improves the accuracy of the target blasting scheme.

The utility model relates to the technical field of protective sheds, and discloses an earth-rock blasting movable protective shed which comprises two supporting plates, a telescopic plate is fixedly arranged between the two supporting plates and close to the upper portion, side supporting legs are fixedly arranged on the two sides of the bottom sides of the two supporting plates, and inner supporting legs are fixedly arranged in the middles of the bottom sides of the two supporting plates. Anti-explosion nets are fixedly arranged between the side supporting legs and the inner supporting legs, placing grooves are formed in the lower portions of the front and rear opposite inner sides of the side supporting legs and the inner supporting legs, lifting sliding grooves are formed in the two sides of the inner walls of the placing grooves, and sliding blocks are slidably arranged between the two opposite sides of the lifting sliding grooves; according to the anti-explosion protective shed, the height of the pulleys in the supporting legs can be adjusted, so that the anti-explosion protective shed can be supported and placed on the uneven ground, the protective shed is prevented from inclining, and the anti-explosion strength of the protective shed is improved.

The application discloses a kind of rock blasting equivalent loading stress curve inversion methods, comprising the following steps: blasting device is detonated to the rock to be measured, and the strain curve of monitoring point is obtained by high-speed acquisition instrument;According to the macroscopic mechanical properties of the rock to be measured, the rock microscopic parameters required by discrete element numerical software are calibrated, and the rock numerical test specimen of the same size as laboratory test is established;Equivalent loading stress peak value, stress loading time and unloading time and the like iteration initial value are brought into rock blasting numerical model, and the strain curve of monitoring point in model is calculated.Error between the curve measured by model and the measured curve is adjusted to stress peak value and time.Finally, when the error is less than a certain value, the rock mass blasting equivalent loading stress loading curve is determined.The application overcomes the problem of elastic inversion distortion caused by rock blasting damage;Not only the accurate calculation of blasting loading stress peak value is realized, but also the whole process of blasting loading stress path can be inverted.

The utility model belongs to the technical field of rock blasting, and particularly relates to a blasthole measuring device before rock blasting, which comprises a barrel and a measuring rod, a mounting disc is arranged at the upper end of the barrel, a winding drum is rotatably arranged on the mounting disc, the measuring rod is slidably arranged on the inner wall of the barrel, a rope is wound on the winding drum, and the measuring rod is connected with the barrel. The rope is connected with the upper end of the measuring rod; an elastic ferrule is arranged on the outer wall of the rope in a tightly attached mode and connected to the interior of the upper end of the barrel through a connecting piece. By means of the winding drum and the rope, stretching and retracting of the measuring rod and the cylinder body are achieved by winding the rope, precise stretching and retracting guiding can be achieved, and depth measurement is conducted on the blast hole. And meanwhile, the depth of the blast hole can be accurately measured, and the problem that due to the fact that the rope is located in the cylinder, a loose point position cannot be observed, the rope is excessively lowered, and then measurement errors occur is solved.

The utility model discloses a rock blasting sampling device for mine geology collection, which relates to the technical field of sampling devices and comprises a connecting seat, a motor is arranged at the top end of the connecting seat, a double-layer core barrel is mounted at the output end of the motor and is positioned below the connecting seat, and the double-layer core barrel is mounted on the connecting seat. Two handles are symmetrically and fixedly connected to the top end of the connecting base and located on the two sides of the motor respectively, and a reset mechanism used for pushing the connecting base to reset stably is arranged on the connecting base. Through the reset mechanism, when a rock sample is taken out, the labor intensity of workers can be further reduced by pushing the connecting seat to automatically reset, the sampling efficiency of the rock sample is effectively improved, meanwhile, in the descending process of the connecting seat, the descending height of the connecting seat can be clearly judged through the movable limiting sliding rod, and the sampling efficiency of the rock sample is improved. Therefore, the sampling depth of the rock sample can be checked in real time.

The application belongs to the technical field of rock blasting, and particularly relates to a rock breaking device and method based on liquid oxygen transient phase change, wherein the rock breaking device comprises a Dewar flask, a perfusion platform, a control platform and a blasting cylinder; further comprising a chassis, the chassis is installed at the bottom of the perfusion platform, and the part far from the side of the bottom of the perfusion platform is connected with the chassis through a hydraulic push rod assembly to realize the overturning and tilting of the perfusion platform on the chassis; after perfusion is completed, a worker immediately controls a lifting device to start, a lifting rod drives a rotating rod to descend, the rotating rod drives the blasting cylinder to descend and insert into a blast hole through the clamping of the clamping rod and the square hole, so that the blasting cylinder just perfused with liquid oxygen can be immediately inserted into the blast hole, because the space inside the blast hole is small, the range of contact between the blasting cylinder and the outside is reduced, the amount of gasified liquid oxygen in the blasting cylinder is reduced, the accuracy of the amount of liquid oxygen during blasting is improved, and the blasting effect is improved, and the rock breaking effect is further improved.