5944results about "Blasting" patented technology

A shock tube package system and a method of deploying a shock tube package system is provided. The system includes a covering made from a flexible or elastic material, the covering defining an interior portion. A bundle of shock tubing is disposed within the interior portion, the covering applying a compression fit on the bundle of shock tubing. The bundle of shock tubing having a first end and a second end, the first end being configured to couple with an initiator device, the second end being configured to couple with a detonator.

The invention discloses a tunnel deep-buried drainage ditch rapid blasting excavation method based on vertical drilling, which comprises the following steps: step 1, detecting the geology in front of a tunnel by using vertical drilling coring, geological radar and TSP seismic wave technology, and constructing a three-dimensional model; 2, generating an asymmetric hole net layout based on a geological model and AI, and setting a drilling-free vibration isolation belt; the design of dense inside and sparse outside is adopted, and vibration propagation is blocked; thirdly, a three-stage air spacer is arranged at the bottom of the blast hole, segmented charging is implemented, the explosive energy release time is prolonged, and the single-segment explosive quantity peak value is reduced; fourthly, an electronic detonator is adopted for millisecond detonation, and peak vibration is weakened through the waveform superposition offset effect; 5, arranging fiber grating sensors in the tunnel, collecting data in real time and transmitting the data to the cloud AI platform; dynamically adjusting parameters based on the monitoring data; and 6, evaluating a blasting effect through a three-dimensional laser scanner, generating an evaluation report in combination with data, updating a BIM model database, and continuously optimizing an AI algorithm.

The invention discloses a blasting design-oriented multi-source data fusion preprocessing method, and particularly relates to the technical field of blasting data scientific processing. Comprising the following steps: acquiring multi-source heterogeneous data of a blasting area through a multi-source sensor array and a geological modeling system, establishing a multi-modal data unified representation framework based on ontology, constructing a depth feature fusion network with physical constraints, developing a blasting parameter optimization-oriented mixed integer programming model, and establishing a blasting parameter optimization-oriented mixed integer programming model; integrating a multi-target genetic algorithm and an expert experience knowledge base to perform parameter optimization; according to the method, a multi-mode unified representation framework based on the ontology is constructed, millimeter-level space alignment and millisecond-level time synchronization of multi-source data are achieved through a space-time reference coordinate system and an improved DTW-B spline composite algorithm, the spatial resolution of blasting design is improved to the centimeter level, the time synchronization precision reaches the millisecond level, and the time synchronization efficiency is improved. Compared with a traditional method, the data utilization rate is increased by more than 40%, and a solid foundation is laid for fine blasting design.

The invention relates to the technical field of metal mine ultra-deep vertical shaft construction, in particular to an advanced pressure relief construction method for a metal mine ultra-deep vertical shaft, aims to solve the problems that the construction safety of a deep shaft is difficult to guarantee and the construction difficulty is high, and is used for a large-diameter vertical shaft with the depth exceeding 1500 m. The lithology and physical mechanics parameters of shaft surrounding rock are obtained by adopting methods such as shaft rock core logging, surrounding rock joint fissure investigation and rock mechanics tests; then mechanical properties of the shaft surrounding rock are analyzed, and shaft surrounding rock excavation disturbance stress field distribution characteristics are obtained; the supporting opportunity and the supporting thickness of the well wall concrete lining are determined, high stress accumulated in a rock mass is released through advanced pressure relief blasting, so that the stress state of the shaft surrounding rock of the non-lining section is actively regulated and controlled, the interaction between the shaft surrounding rock and the subsequent well wall concrete lining is weakened, and the construction difficulty is effectively reduced; various means such as shaft stratum transparency analysis and ground pressure disaster prevention and control early warning are adopted, and safety and high efficiency of digging and supporting construction of the ultra-deep shaft are guaranteed.

The invention provides an intelligent optimization method and system for tunnel smooth blasting blast holes in layered rock mass, and belongs to the technical field of tunnel engineering and blasting. The method comprises the steps of collecting stratified rock geological data, evaluating and extracting features, constructing a multi-objective optimization function, solving by an intelligent optimization algorithm, performing construction feedback and dynamic optimization and the like. The method comprises the following steps of: acquiring data by using various geological exploration equipment, performing evaluation processing on the data by using a support vector machine model, constructing an optimization function considering multiple indexes, solving an optimal blast hole parameter combination by combining a genetic algorithm and a particle swarm optimization algorithm, and finally feeding back a blasting effect to dynamically adjust an optimization scheme. According to the intelligent optimization method and system for the smooth blasting blast holes of the tunnel in the layered rock mass, the blasting effect can be improved, over-break and under-break and concrete consumption can be reduced, the construction cost can be reduced, the construction safety and efficiency can be enhanced, and remarkable economic and social benefits can be achieved for layered rock mass tunnel engineering construction.

The invention discloses a method for determining the distance between blasting unit groups for a surface mine, a rapid adjusting device and a blasting operation system. The determination method comprises the following steps: acquiring multi-dimensional data through a geological radar, a sensor and the like, and constructing a model through normalization processing; a finite element-discrete element coupling algorithm is adopted to carry out three-dimensional geology-blasting coupling modeling, an improved NSGA-III algorithm is combined to solve a multi-objective function to determine an optimal interval, and Kalman filtering is utilized to realize real-time feedback correction. The rapid adjusting device comprises a multi-angle adjusting module, an intelligent navigation module and a cooperative control module, and accurate positioning and rapid adjusting can be achieved. According to the method, a modeling-calculating-adjusting-feedback full-process automatic system is formed, and compared with a traditional technology, the lumpiness qualification rate can be increased by 25% or above, the interval adjusting time is shortened to be within 15 minutes, and the mine blasting efficiency and safety are effectively improved.

The invention relates to the technical field of material engineering, in particular to a preparation method and application of a light heat insulation cement aerogel material.The preparation method comprises the following steps that an adhesive is taken and dissolved in water, and then the solution is cooled to the room temperature; adding a dispersing agent into the solution, then adding cement, uniformly stirring, adding a hydrophobic component, and uniformly stirring; reinforcing fibers are added and evenly stirred, and the reinforcing fibers are at least one of polymer fibers, carbon fibers and glass fibers; adding the foaming component, and uniformly stirring; pouring the solution into a mold, performing freezing pore-forming by using liquid nitrogen, and recovering to room temperature after the freezing pore-forming is finished; and then drying to obtain the cement aerogel material after the drying is finished. The cement aerogel material prepared by the invention has excellent characteristics of high strength, light weight, non-flammability and the like, is used for a buffer layer of an explosion-proof tank, and can integrally improve the performance of the explosion-proof tank.

The invention discloses a large-section long-footage mechanical blasting mixed excavation method suitable for a subway station, and relates to the technical field of underground rail transit engineering, and the method comprises the following steps: obtaining a tunnel section contour, a geologic structure and blasting parameters, building a three-dimensional blasting wave propagation inversion model, and combining geology and material heterogeneity to obtain a three-dimensional blasting wave propagation inversion model; and identifying a closed space region forming reflection interference, and predicting a space point location where blasting wave energy is abnormally accumulated. Based on the three-dimensional blasting wave propagation inversion model, the abnormal wave energy accumulation area is predicted in combination with geological heterogeneity, the high-risk blasting section is recognized, parameters are reconstructed, vibration real-time monitoring and model feedback correction are assisted, a closed-loop control system is constructed, local wave crest abnormity is effectively restrained, and the safety and controllability of large-section tunnel blasting construction are improved.

The invention discloses a method for excavating frozen soil of a connecting channel by using an Ai rdox blasting system. The method comprises the following steps: step (1), arranging blasting holes in an excavation tunnel face of the frozen soil of the connecting channel; (2) a blasting cartridge is installed in the blasting hole, and the air inlet end of the blasting cartridge is connected with air supply equipment of an Ai rdox blasting system; (3) the gas supply equipment is started for blasting the blasting cartridges, and only one blasting cartridge is blasted each time; and (4) after all the blast holes are blasted, the excavation condition is checked, and secondary crushing is conducted manually through an air pick. The technical problems that an existing communication channel frozen soil excavation method is poor in safety and low in construction efficiency can be solved.

The invention discloses an intelligent blasting sequence control system for mixed loading explosives, which is provided with a data acquisition module, a data preprocessing module, a model construction module, a parameter optimization module, a multi-target control module and a data storage module to intelligently control the blasting sequence of the mixed loading explosives. Distance attenuation features, delay features, topographic features and blasting energy features of blasting data are constructed, the blasting prediction model is updated and iterated based on a neural network algorithm and historical blasting data information, and the performance of the blasting prediction model is evaluated. The number of hidden layers and the number of nodes in the blasting prediction model are updated and optimized through a control variable method, the blasting prediction model is optimized, when mixed explosive is adjusted and the blasting sequence is optimized, the optimal mixed explosive composition is searched through a search optimization algorithm, and the optimal mixed explosive composition is obtained through control signals in combination with real-time blasting data information. And the blasting sequence and delay are dynamically adjusted, so that the blasting of the mixed explosive is intelligently and accurately controlled in real time.

The invention relates to the technical field of mining, and discloses a method for determining pre-splitting blasting parameters for mining blasting, which comprises the following steps of: 1, acquiring rock mass structure information of a blasting area through three-dimensional geological radar, laser radar and shallow seismic reflection data, and constructing a structural plane distribution map containing a soft and hard interbed and joint combination mode; 2, initial presplitting blasting parameters are generated based on the structural plane distribution map, wherein the initial presplitting blasting parameters comprise the hole distance, the linear charge density and the charge structure; according to the method, the technical scheme that the structural plane distribution map is constructed through multi-source geological data fusion and digital twinborn simulation dynamic correction is adopted, so that the technical effects that the influence of a complex structure combination on blasting energy transfer is accurately quantified, and the presplitting path control precision is remarkably improved are achieved; compared with the technical scheme depending on a static rock mass model or an empirical formula in the prior art, the defects of presplitting path offset and serious parameter mismatch caused by the fact that modeling is not carried out due to the dynamic effect of the structural plane are overcome.

The invention relates to the technical field of coal mine safety mining, and discloses a coal rock gas disaster protective layer drilling hierarchical regulation and control method which comprises the following steps: S1, geological survey; s2, drilling and pressure relief; s3, hydraulic fracturing is carried out; s4, gas extraction is carried out; s5, top plate deep hole blasting; s6, advanced cave building energy absorption flexible supporting is carried out; s7, grouting reinforcement is conducted; and S8, continuous regulation and control. According to the protection layer drilling grading regulation and control method for coal rock gas disasters, multiple functions are integrated into a single drilling hole, resource saving, cost reduction and efficiency improvement are achieved, mine environment interference is effectively reduced, meanwhile, the state of a coal rock gas system is continuously regulated and controlled, the timeliness and flexibility of disaster prevention and control are ensured, and the protection layer drilling grading regulation and control method is suitable for popularization and application. The method adapts to different geological conditions, enhances coal mine safety, embodies double benefits of green mining and economic optimization, and marks the leading-edge progress of a coal mine safety technology.

A downhole perforating gun system provides wireless electrical communication between an inner body conductor, a switch, a detonator, and a feedthrough, and further comprising a weight module and a bearing assembly wherein the weight module is rotatable by a weight via a bearing assembly based on gravity acting on one or more of the weights.

The invention provides a deep well roadway surrounding rock area stress optimization control method, and belongs to the technical field of surrounding rock area stress optimization, and the method comprises the following steps: obtaining key data of deep well roadway surrounding rock; identifying a potential stress concentration area; performing grading evaluation on the identified potential stress concentration area, and determining the grade of the surrounding rock according to an evaluation result; according to the grade of the surrounding rock, a corresponding supporting strategy is formulated; the advanced presplitting blasting technology is applied to all grades of surrounding rocks; arranging a plurality of sensor nodes in the stress concentration area; the sensor nodes send monitoring data to the cloud processing center in a wireless mode, and the cloud processing center predicts the stability of surrounding rock and sends a prediction result to the expert terminal; and an expert formulates a new support strategy or adjusts an existing support strategy according to the prediction result of the expert terminal. According to the stress optimization control method for the surrounding rock area of the deep well roadway, the stability of the surrounding rock is improved through comprehensive technical means, and safe and efficient mining of a mine is guaranteed.

The invention provides a safe, efficient and high-recovery-rate segmented medium-length hole mining method, and belongs to the field of underground mining. Firstly, presplitting blast holes are formed in rock drilling roadways at the bottoms of stopes, ore bodies at the boundaries of every two adjacent stopes are divided into triangular jambs, and the presplitting blast holes are charged at intervals and subjected to blasting presplitting; separating the top boundary of the triangular jamb from the mining lower boundary of the stope, performing blasting recovery and filling on the triangular jamb, and performing blasting recovery and filling on the normal ore body of the stope. According to the method, the bottom structure of the stope is optimally arranged, ore body mining boundary control is achieved, meanwhile, the stoping sequence is adjusted in a matched mode, ore resources pressed and covered in a triangular pillar area are effectively recycled, construction safety is guaranteed, the situation of mining under a filling body is avoided, and the mining efficiency is improved. And the lean loss index of ore resource recovery is accurately controlled, and the recovery of the triangular jambs and the normal recovery of the stope are orderly linked, so that the efficient production of the stope is realized.

The invention provides a tunnel blasting scheme determining method and device, and relates to the technical field of tunnel engineering data processing.The method compensates stress wave attenuation caused by large-aperture blast hole air gaps through radial explosive density gradient design, so that the energy utilization rate is higher; the axial charge density is dynamically adjusted on the basis of a three-dimensional clamping coefficient, the problem that energy of a hole bottom high constraint area is insufficient is solved, the explosive density and the hole net topology are collaboratively optimized, the contour forming quality is greatly improved, back break is reduced, and therefore the cost is reduced, and the time is shortened. Due to the fact that explosive and hole net parameters are optimized, energy distribution is more reasonable, blasting disturbance is reduced, stability of surrounding rock is enhanced, safety in a hole is greatly improved, and casualties are reduced.

The invention discloses a rock slope blasting protection method and device, equipment, a medium and a product, and relates to the field of slope blasting, the method comprises the steps that on the basis of site trial blasting, a trial blasting area parameter set is obtained, and the trial blasting area parameter set comprises a first parameter set and a second parameter set; establishing a blasting model based on the field trial explosion type of the trial explosion area and the corresponding blasting model parameter set; inputting the first parameter set into the blasting model to obtain a third parameter set; sequentially comparing parameter values in the second parameter set with parameter values in the third parameter set, and adjusting the blasting model parameter set based on a comparison result to obtain an optimized blasting model; inputting the fourth parameter set into the optimized blasting model to obtain a fifth parameter set; and based on the fifth parameter set, a rock slope blasting protection scheme is established, so that rock slope blasting protection is achieved. According to the method, the error and the uncertainty of artificially establishing rock slope blasting protection measures are reduced.

The invention discloses an excavation part surrounding rock image-based blasting parameter real-time adjustment technology, which comprises the following working steps of: S1, equipment selection and arrangement: selecting photographic equipment with a frame rate of 100,000 frames per second and a resolution ratio of 4K or more, arranging a plurality of cameras to shoot a blasting process from different angles, and then configuring strong lighting equipment, and a strain sensor, a vibration sensor, a pressure sensor and a sonic sensor are installed, and blasting data are collected in real time. By improving the performance of the high-speed photographic equipment and applying technical means such as a three-dimensional reconstruction technology, a real-time feedback control system, AI auxiliary analysis, sensor fusion, numerical simulation, unmanned operation and the like, the precision and efficiency of researching the expansion rule of the blasting crack can be further improved. According to the improved technology, more accurate and dynamic support is provided for blasting design, blasting damage control is optimized, and the safety and efficiency of engineering application are improved.

The invention discloses a high gas impact ground pressure mine island working face blasting pre-pressure-relief scour prevention method which comprises the steps that a scour inducing key layer in a top plate above an island working face is determined, a top plate pre-splitting pressure relief roadway with specific construction parameters is arranged in the scour inducing key layer, and by means of the mode, elastic deformation accumulated in the scour inducing key layer can be effectively reduced, and one-time pressure relief can be achieved; then, a plurality of blast holes with specific parameters are constructed from the roof presplitting pressure relief roadway to the inducing key layer, finally, the blast holes are sectioned according to the hole depth and sequentially blasted, energy release of each time of blasting is accurately controlled through sectioned blasting, meanwhile, continuous pressure relief is achieved in time and space through sectioned blasting, and the blasting efficiency is improved. The stress of the inducing key layer is effectively released to realize secondary pressure relief; through mutual cooperation of primary pressure relief of the roof presplitting pressure relief roadway and secondary pressure relief of segmented blasting of the blast hole, the mine roof type impact risk facing high gas, an island working face and mining rock burst is effectively reduced, and subsequent safe mining of the island working face is guaranteed.

The invention discloses a weak surrounding rock tunnel peripheral hole empty hole guide back break control blasting construction method. The method comprises the steps that the surrounding rock grade and the blasting circulation footage are determined; designing tunnel peripheral hole hollow guide drilling blasting parameters, and determining peripheral hole pitch and explosive load; performing drilling operation; after drilling of the rock drilling equipment is completed, hole-separated charging is carried out on the peripheral holes, and the distance L between the charging peripheral holes and the non-charging empty holes is preliminarily calculated by analyzing the stress state, the impact pressure and the failure criterion of rock; according to the distance L, non-charging empty holes are formed between the charging peripheral holes; after safety alert is ensured, blasting is carried out; the steps are repeated until the tunnel blasting back break value reaches the expected standard, the optimal tunnel peripheral hole hollow guide drilling blasting parameters can be determined, and construction is conducted according to the optimal parameters; over-excavation and under-excavation can be effectively controlled, the situations of block falling of weak surrounding rock and the like are effectively reduced, and the safety and working efficiency of follow-up construction operation are improved.

The invention belongs to the technical field of underground blasting, and discloses a drilling angle lumpiness optimization method and system in bottom upward fanning hole blasting. The method comprises the steps that a displacement detector is used for obtaining the drill hole deflection angle of a plurality of upward fan-shaped hole rock drilling holes, and under the drill hole deflection angle meeting the design requirement of the hole bottom distance, according to the hole row distances set according to different lithology, the drill hole bottom distance is obtained; the blasting construction lumpiness and blasting vibration are controlled by adjusting filling and blasting modes, delay time and one-time blasting quantity parameters; for the steeply-inclined jointed rock stratum, a VCR mining method is adopted for carrying out numerical simulation calculation and field test, blasting parameters are optimized, the filling length, explosive quantity and delay time blasting parameters of the two ends of a blast hole are determined, deep hole blasting in the steeply-inclined jointed rock stratum blasting construction is completed, and the lumpiness is made to be uniform. The mining efficiency of the goaf can be improved, maximum utilization of resources is achieved, and economic benefits are improved.

The invention discloses a complex geological weak surrounding rock tunnel micro-disturbance green blasting construction method which comprises the following steps: acquiring multi-source data through a sensor and geological survey equipment, and extracting a standardized feature set; and constructing a blasting parameter and surrounding rock response prediction model by using a random forest algorithm, inputting explosive load and hole net parameters, and outputting predicted surrounding rock deformation and vibration values. And if the vibration value exceeds the environment-friendly threshold value, adjusting the parameter by adopting a gradient descent algorithm until the requirement is met. And in combination with real-time monitoring data, the surrounding rock response is dynamically updated by using a Kalman filtering algorithm. If the overexcavation probability exceeds the threshold value, the parameters are further optimized through a genetic algorithm. And finally, optimizing resource allocation through a linear programming algorithm, and determining a final blasting scheme. Intelligent regulation and control of blasting parameters of the weak surrounding rock tunnel are achieved, vibration and deformation are effectively controlled, the overexcavation risk is reduced, the construction efficiency and quality are improved, and a new technical scheme is provided for similar projects.

The invention relates to a water-rich soft rock tunnel close-range undercrossing adit controlled blasting structure and a construction method thereof, and the construction method comprises the steps of existing line assembly type temporary supporting, full-section primary drilling, lower section underholing area blasting, upper section blasting, steel arch frame installation, temporary supporting and the like, and the existing line assembly type temporary supporting adopts the assembly type temporary supporting to reinforce the adit; a movable excavation rack is adopted for full-section primary drilling for full-section drilling, the movable excavation rack is provided with a telescopic construction platform and adapts to tunnel faces with different widths, a rope saw slotting machine is adopted for slotting in a lower section slotting area for manufacturing a free face, a low-layer movable excavation rack is adopted for charging and then blasting in an upper section blasting process, and the movable excavation rack is provided with a telescopic construction platform and adapts to tunnel faces with different widths. The steel arch frame is finely adjusted and positioned through an adjustable supporting column, the steel arch frame is accurately installed, and a temporary support adopts a temporary support and a temporary inverted arch to form a stable system. The method has the advantages that the construction efficiency is high, the supporting effect is good, the existing line is stable, and the steel arch is not prone to deformation.

A gun tube for a downhole perforating gun assembly includes a body having a cavity and one or more weights in the cavity. Gravity acts on the weights, which causes the tube body to rotate around its longitudinal axis so the weights are adjacent the lower part of the wellbore in which the gun assembly is positioned when oriented horizontally. This position shape charges in the gun tube in a desired position prior to the shape charges being fired. The gun tube may also include one or more end connectors with electrical contacts having a first, extended position, and a second, contracted position, and / or end connectors that can be assembled by hand without the use of tools.

Disclosed are a method and a device for identifying full-section excavation parameters of large-section tunnel with broken surrounding rock, which is capable of solving the problem of inaccurate arrangement of blasting hole points in tunnel excavation engineering, including following steps: establishing a three-dimensional finite element model based on a blasting section design of a tunnel; performing a simulation with the three-dimensional finite element model based on blasting design parameters to obtain blasting quality parameters; selecting a group closest to a preset quality parameter from multiple groups of the blasting design parameters as target blasting design parameters, wherein the preset quality parameter is an acceptance grade standard of the tunnel; obtaining first thermal imaging information of a first hot spot of a surface to be blasted; calibrating actual hole spacing parameters based on the first thermal imaging information and the target blasting design parameters.

The invention discloses a parabola type explosion action and static action dual-energy-gathering device and a blasting method, and relates to the technical fields of directional fracture control blasting, building demolition and the like in mine and tunnel engineering. The device comprises a main body pipe which is a hollow tubular circular ring body and forms a closed channel along the annular direction; the energy-gathered jet flow groove is formed in the outer side wall of the main body pipe and distributed in the axial direction, the cross section contour of the energy-gathered jet flow groove is in a parabola shape, and the energy-gathered jet flow groove is used for guiding explosion stress waves to be intensively propagated and released in the preset direction; the energy gathering seam is formed in the bottom of the energy gathering jet flow groove and penetrates through the inner wall of the main body pipe; and the explosive loading cavity is used for fixedly placing explosives. By combining the dual energy gathering principle of explosion action and static action, energy is concentrated in the energy gathering direction in the explosion process, so that explosion energy is accurately released along a parabola-shaped track, the explosion wave focusing effect is enhanced conveniently, and invalid energy loss is reduced.

A detonation module for a perforation tool includes a detonator, a switch circuit disposed in a fluid-sealed housing and electrically coupled to the detonator, a shielding circuit coupled to the switch circuit, an annular electrical contact electrically coupled to the switch circuit, and an annular, electrically conductive, compressive member to form a compressive electrical connection with an end of a perforation unit.

The invention discloses a tunneling blasting intelligent charging system based on an arch frame trolley. Full-automatic intelligent charging of blasting holes in a blasting tunnel face is achieved. By means of an arch frame trolley commonly used in tunnel construction, a full-automatic intelligent explosive charging system is integrated on the arch frame trolley, namely, an intelligent control mechanical arm is integrated at the top end of a cantilever beam of the arch frame trolley, and a pneumatic explosive charging machine and an explosive cartridge stock bin box body are integrally installed on an arch frame trolley body. A movable initiating explosive cartridge storage box filled with initiating explosive cartridges is placed on the ground on the front side of a blasting tunnel face, and automatic explosive taking and charging of the initiating explosive cartridges are achieved by controlling a mechanical arm; a stepping type automatic distributing mechanism ingeniously connected with an explosive cartridge storage bin is designed, an air cylinder conveying mode is adopted, the distributed explosive cartridges are automatically conveyed into a pneumatic charging machine, and automatic charging and filling of the explosive cartridges of blast holes are achieved through cooperation with the pneumatic charging machine.

The invention relates to the technical field of underground engineering and geotechnical mechanics, and provides an ABAQUS secondary development-based underground engineering blasting simulation method, which comprises the following steps of: 1, establishing a geometric model and dividing a calculation region into an Euler domain and a Lagrange domain; step 2, calling and realizing a JH-2 constitutive model through a UMAT user subprogram interface of the ABAQUS; step 3, modeling in an Euler domain by adopting a JWL state equation; step 4, applying a coupling Euler-Lagrange method; 5, setting boundary conditions and blasting loading parameters of the geometric model; and step 6, performing transient dynamics calculation, and outputting a result for analyzing a blasting effect. According to the scheme, a high-precision numerical test platform can be provided for underground engineering blasting design and safety control, engineering risks are reduced, blasting parameter configuration is optimized, and remarkable engineering application value and popularization significance are achieved.

A system including a range extension system for extending a range of magnetic induction (MI) signals along a pathway for commercial / civil blasting operations that use a wireless blasting-related device, the range extension system including an elongated element configured to extend the range of the MI signals along the pathway.