77 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 discloses an asymmetric and uncoupled tunnel smooth blasting method. The method comprises the steps that surrounding rock grading data and initial ground stress distribution of a target area are obtained, and a low-damage trial blasting scheme is optimized; drilling operation is conducted on the basis of the low-damage trial explosion scheme, a specific pre-charging place is selected to assemble an asymmetric non-coupling refined charging sleeve device, and a peripheral hole pre-charging sleeve device is further assembled; the peripheral holes are filled through a peripheral hole pre-charging sleeve device, other blast holes are filled in a continuous charging mode, and blocking is conducted after filling is completed; and constructing a detonating network, ventilating after detonating, checking the detonating effect, and iteratively optimizing a trial detonating scheme according to a damage judgment result. According to the method, the acting direction and the acting range of energy during blasting of explosives in peripheral holes can be accurately controlled, so that the disturbance influence of the blasting effect on surrounding rocks is relieved, the blasting damage degree of the surrounding rocks is reduced, construction safety is guaranteed, the occurrence frequency of back break phenomena is reduced, and the construction efficiency can be greatly improved.

The invention discloses a loading structure optimization method based on stress wave analysis in open bench blasting. The method comprises the following steps: S1, performing rock mass blasting and stress wave theoretical analysis, researching a rock mass blasting rock breaking process and a breaking mechanism, deducing rock mass blasting mechanisms under different coupling media, and analyzing the influence of different coupling media on the blasting effect; and S2, calculating the initial delay detonation time according to the delay detonation rock blasting principle, and determining the optimal delay detonation time through numerical simulation calculation and field test demonstration. According to the method, a method combining theoretical analysis, numerical simulation and field test is comprehensively applied, a scientific and systematic charging structure optimization scheme is provided for open bench blasting, wide applicability and popularization value are achieved, progress of the open bench blasting technology can be promoted, and sustainable development of the mining industry is promoted.

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.

The utility model relates to the technical field of blasting devices, discloses a hole bottom air spacer for rock-soil blasting, and solves the problem that the spacer cannot adjust the depth position of explosive in real time, so that the spacer is inconvenient to use. A protection assembly is fixedly arranged on the outer side of a spacer main body, the spacer main body comprises a lifting structure, and the lifting structure is arranged on the outer side of the spacer main body; the lifting structure comprises an air bag, an air inlet is fixedly formed in the upper end of the air bag, a position adjusting structure is movably arranged on the inner side of the lifting structure, gas is inflated into the air bag through the air inlet, the air bag rapidly expands and recovers and jacks up the position adjusting structure to ascend, and the explosive reaches the preset ideal position. The operation process is optimized, time and labor are saved, precision is high, and practicability of the device is greatly improved.

The invention discloses a hard rock explosion test system and method in a deep ground stress environment, and belongs to the technical field of rock explosion optimization design, the system comprises a ground stress hydraulic loading module, a sample bearing module, an explosion generation module, a non-contact optical measurement module and an automatic trigger device; the method comprises the steps of sample processing, system assembling, blasting structure laying, sample surface processing, ground stress loading, measurement preparation, explosion testing and data processing. According to the hard rock explosion test system and method in the deep ground stress environment, the blank of a large-size and large-equivalent explosion test platform and analysis means under deep in-situ ground stress is filled; a parallel efficient calculation digital image correlation analysis system is constructed, and an explosion pressure field can be quickly inverted.

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 application discloses an air spacing device for blasting holes in an open-pit mine and a blasting structure. The air spacing device comprises support rods A, support rods B, a circular ring a, a connecting component and a pull rod. The upper end of each support rod A is welded with a connecting ring. Four connecting rods are perpendicularly welded at one end on the inner side of the circular ring a. A circular ring b is arranged at the central position of the inner side of the circular ring a. The circular ring b is welded with the other end of the four connecting rods. Four support rods A are respectively sleeved at four empty spaces of the circular ring a. One end of each support rod B is rotatably connected to the middle position of each support rod A. The other end of each support rod B is rotatably connected to the connecting component. The upper end of the connecting component is welded with a circular ring c. The pull rod is connected to the circular ring c through the circular ring b for cooperation. The device greatly reduces the workload, guarantees the smooth development of the charging work, achieves the charging design of air spacing charging, makes the explosion energy uniformly distributed, improves the rock blasting effect, is simple in operation and improves the production benefit of the mine.

The present application relates to the technical fields of rock blasting, in particular to a kind of detection equipment and method for blasting hole for rock blasting, including drive rotary table, drive assembly is equipped on the drive rotary table, identification device for identifying hole collapse is symmetrically equipped on the drive assembly, both ends of each identification device are equipped with synchronous assembly, one side of the synchronous assembly is equipped with recording assembly, the side end of the recording assembly is equipped with paper outlet assembly, the identification device includes induction assembly and control assembly.The present application can automatically detect hole depth and hole wall hole collapse position by the working of identification device and recording assembly, and record and analyze hole collapse position at the same time, so that detection efficiency and convenience are greatly improved.

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 application discloses a kind of post-blasting sandstone type uranium mine in-situ leaching mining effect prediction method, it is related to sandstone type uranium mine in-situ leaching mining effect numerical simulation field, including: based on finite element analysis platform, HJC rock blasting constitutive model is constructed, blasting numerical simulation is carried out;Calibration is carried out to blasting fracture damage nephogram by Kriging interpolation algorithm;COMSOL multi-physics field model is constructed;Based on MATLAB, COMSOL multi-physics field model and the coupling interface of PHREEQC are constructed, and circulation time and time step are optimized;Geochemical reaction calculation is carried out and saved, while COMSOL file is run, the geochemical reaction calculation result is input into PHREEQC, and dynamic cyclic iteration simulation is obtained;Through integrated LSTM neural network, uraniumyl complex migration coefficient is dynamically corrected, and the output uranium migration multi-scale dynamic simulation result is obtained.Circulation termination.The application realizes the multi-scale dynamic simulation of uranium migration in the process of lixiviant injection, and improves the uranium migration prediction accuracy.

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 discloses a charging device for rock blasting, which relates to the technical field of rock blasting and comprises a charging mechanism, the charging mechanism comprises a charging hopper, and an air bag component is mounted at the lower end of the outer wall of the charging hopper; and the supporting mechanism comprises a mounting ring, the mounting ring is fixedly connected to the upper end of the outer wall of the charging hopper in a sleeving mode, a plurality of auxiliary supporting assemblies are arranged on the bottom wall of the mounting ring, balance weight frames are installed at the top ends of the auxiliary supporting assemblies correspondingly, and balance weight blocks are arranged in inner cavities of the balance weight frames correspondingly. According to the auxiliary supporting device, the air bag assembly is inflated through inflation equipment in the prior art and abuts against the inner wall of the blast hole, so that the auxiliary supporting effect on the charging hopper is achieved under the action of the multiple sets of auxiliary supporting assemblies, and the multiple sets of balancing weights are placed in the inner cavities of the balancing weight frames at the corresponding positions; therefore, the stability of the charging hopper can be improved through gravity under the cooperation of the auxiliary supporting assembly, and the charging hopper is not prone to being blown by wind to topple over.

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 damage uniform control method of an axial interval charging structure, which comprises the following steps: S1, basic parameters of blasting engineering are determined, and the basic parameters comprise blast hole diameter, blast hole depth, mechanical parameters of target rock and explosive type; s2, an axial interval charging structure is designed, the axial interval charging structure comprises an upper-section explosive, a lower-section explosive and an inert interlayer, the inert interlayer is arranged between the upper-section explosive and the lower-section explosive, the length of the upper-section explosive is 2 / 3 of the length of the final assembly explosive, and the length of the lower-section explosive is 1 / 3 of the length of the final assembly explosive; the detonating point of the upper-section explosive is arranged at the middle lower part of the upper-section explosive, and the detonating point of the lower-section explosive is arranged at one end, close to the inert interlayer, of the lower-section explosive. The method effectively eliminates the root and large block problems of a traditional detonating mode, and damage distribution is uniform; the blasting effect stability is improved; and the method has important significance for promoting refined development of a rock blasting technology.

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.