3776results about "Blasting" patented technology

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 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 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.

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 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 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 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 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.

The invention discloses a V-shaped mine collecting trench construction method for improving the stability of a roadway in an ore pillar, which comprises the following steps of: constructing a plurality of rows of upward fan-shaped blast holes along the trend of a stope, and adding an empty hole in the middle position of each of the left side hole and the right side hole in the adjacent rows of fan-shaped blast holes; the fan-shaped blast holes are filled with explosives, and newly-added empty holes are not filled with explosives; and the cutting raise is used as a blasting free surface, and the fan-shaped blast holes are detonated row by row in several times to form the V-shaped mine collecting trench. According to the method, through cracks are formed along the center connecting lines of the side holes under the guiding effect of the newly-added empty holes during fan-shaped hole blasting, cutting of the V-shaped boundary is completed, damage of fan-shaped blast hole blasting to ore pillar rock mass is reduced, and the purposes of improving the integrality of ore removal roadway surrounding rock and the stability of an ore removal roadway are achieved. The V-shaped ore collecting trench construction method is suitable for V-shaped ore collecting trench construction of a stope bottom structure of an open stope subsequent filling mining method, damage to ore pillar rock mass can be weakened in the V-shaped ore collecting trench construction process, and then the stability of an ore removal roadway is improved.

An explosive downhole tool includes a housing having an upper housing part on one side of a window section and a lower housing part on an opposite side of the window section. An explosive charge is provided within the housing for cutting or expanding the wall of the tubular. The majority of outer surface of at least one of the upper and lower housing part in cross-section is rounded so as to be devoid of corners. The rounded surface eliminates the presence of sharp corners that may catch on restrictions or protrusions in a wellbore so that the downhole tool is more easily conveyable within a wellbore. Another explosive downhole tool includes fins extending from the housing. The fins have a height that decreases in a direction away from the housing. The shape of the fins enables the downhole tool to be more easily conveyable within the wellbore.

The invention discloses a self-adaptive pre-pressure-relief danger relieving device for a deep mine. The self-adaptive pre-pressure-relief danger relieving device comprises a supporting assembly. The supporting assembly comprises two side supporting plates which are symmetrically arranged, a top supporting plate is installed on the tops of the side supporting plates through connecting plates, and a plurality of pressure relief buffering assemblies which are arranged at equal intervals are installed on the outer walls of the side supporting plates and the outer wall of the top supporting plate. A pressure relief channel is established through the drilling assembly, continuous and directional hydraulic pressure relief is achieved in combination with the jet flow pressure relief assembly, rock mass fractures are effectively expanded, in addition, high-energy shock waves can be rapidly released through the blasting pressure relief assembly, strong pressure relief is achieved, and the device is suitable for a high-stress area; the jet flow pressure relief assembly and the blasting pressure relief assembly are switched in the hollow anchor rod, and an external water supply system and a blasting control system are connected, so that a mine has high adaptive capacity and safety performance according to different pressure relief requirements.

The invention discloses an anti-static flexible fracturing rock breaking pipe based on a conductive oxygenating conduit, which comprises a flexible outer sleeve film with two closed ends and filled with an adsorbing material combustion agent, and further comprises the conductive oxygenating conduit penetrating into the flexible outer sleeve film from the top of the flexible outer sleeve film, an excitation wire and an exhaust pipe, the excitation wire is connected with an electric ignition device, and the electric ignition device is positioned in the flexible outer sleeve film and is in contact with the adsorption material combustion agent; the outer wall of the conductive oxygenation conduit is connected with a conductive unit. The invention further discloses a rock breaking method using the anti-static flexible fracturing rock breaking pipe based on the conductive oxygenating guide pipe, the conductive unit is arranged on the conductive oxygenating guide pipe and makes contact with the ground for conduction, static electricity generated in the filling process of liquid oxygen or pressurized high-purity liquid oxygen can be guided out and eliminated, and the anti-static flexible fracturing rock breaking pipe based on the conductive oxygenating guide pipe can be used for breaking rocks. Static electricity generated in the filling process of liquid oxygen or high-purity liquid oxygen with pressure can be conducted away and eliminated more efficiently, timely and continuously, and the risk of safety accidents caused by the static electricity is greatly reduced.

The invention discloses a double-row medium-length hole blasting method for a filling stope. According to the method, a theoretical value range of each blasting parameter is deduced according to field engineering practice, an ore rock blasting crushing mechanism and a blasting parameter theoretical formula. The method comprises the following steps of: constructing a stope blasting model with different hole bottom distances, explosive unit consumption and resistance line combinations by using ANSYS numerical simulation software in combination with physical and mechanical properties of ore rocks and field explosive performance parameters, and preferably selecting double-row medium-length hole blasting parameters according to a chamber effective stress distribution rule and a roof area vibration velocity peak value of the ANSYS blasting model. According to the method, by selecting the double-row optimal medium-length hole blasting parameters, it is guaranteed that ore rocks in the chamber are fully crushed, the effective stress invading the roof and the blasting vibration velocity peak value are reduced, and the roof is prevented from being damaged. And meanwhile, the explosive loading amount is reduced, the economic cost is reduced, and the production efficiency of a mine is improved.

The invention discloses a tunnel peripheral hole smooth blasting parameter intelligent optimization system and method, and relates to the technical field of blasting, and the system comprises a data management module, a factor identification module and a parameter optimization and scheduling module. Dynamic adjustment and scheduling optimization of the blasting parameters are achieved by collecting blasting data in real time, extracting key parameters, screening influence factors in combination with a factor recognition algorithm and constructing a parameter scheduling optimization model, and the system can effectively improve scientificity and accuracy of blasting design, so that efficient, accurate and self-adaptive optimization of the blasting parameters can be achieved; and the requirements of high quality and high efficiency of modern tunnel engineering construction are met.

The invention provides a broken thick and large ore body combined mining method based on medium-length hole blasting and drift type cooperation, and belongs to the field of ore body mining. Firstly, an ore body is segmented and partitioned, blocks are formed in a three-dimensional space, then the blocks are alternately operated through sequential control, meanwhile, the positions of a pre-splitting area and a recovery area are limited in the space, and the positions of the pre-splitting area and the recovery area are determined; and safe and efficient mining of the broken thick and large ore body is realized in cooperation with a medium-length hole subsection presplitting blasting and drift stoping process. According to the method, on the basis that the broken thick and large ore body is segmented and partitioned, and time sequence and space regulation and control are conducted on operation of the blocks, medium-length hole blasting is used for presplitting the ore body, controllable caving lumpiness is formed, direct disturbance to a recovery area is reduced, caved ore is efficiently recovered by adopting access road type mechanical equipment, and the recovery efficiency is improved. The large-scale caving advantage of the medium-length hole sublevel mining method is exerted, safe and efficient recovery of the broken ore body is guaranteed through drift type mining, and remarkable technical breakthrough is achieved.

The invention provides a deep tunnel surrounding rock internal blasting vibration prediction method and system, and relates to the technical field of tunnel engineering blasting, and the method comprises the steps: horizontally drilling a plurality of test holes from a preceding tunnel to the interior of surrounding rock, and sequentially installing a blasting vibration sensor at the hole bottom of each test hole through a push-pull device; the following tunnel is blasted, and vibration data, collected by the vibration sensor, of the test hole are obtained; a first blasting vibration velocity prediction model in front of the tunnel face is obtained through fitting of the vibration data of the test hole in front of the tunnel face and the blasting center distance; calculating the actual explosion center distance of the test hole behind the tunnel face; and fitting the Sadgowski formula by using the actual blasting center distance and the vibration data of the test hole behind the tunnel face to obtain a second blasting vibration velocity prediction model behind the tunnel face. According to the invention, the push-pull device is adopted to solve the problem of monitoring the vibration in the surrounding rock of the deep tunnel and the problem of a propagation path of blasting stress waves in a complex environment; and the precision of the blast vibration prediction formula behind the tunnel face is improved.

The invention provides a coal mine underground driving working face outburst prediction method, which comprises the following steps of S1, arranging drill holes at equal intervals along the inclination direction of a working face, and forming a top cutting angle between the drill holes and the working face; s2, establishing a numerical model of the non-through pre-splitting top cutting surface of the roadway roof in FLAC3D software; s3, N groups of drilling hole top cutting angles are set in the numerical model for non-through presplitting blasting effect simulation, and the needed drilling hole and working face top cutting angle is selected; s4, a pre-generated crack is manufactured in the overlying strata key layer at the drilling position in a blasting mode, and an advanced non-through pre-splitting top cutting face is constructed; s5, the length of a pre-generated fracture formed in the overlying strata key layer is calculated, and the drill hole interval is determined according to the length of the pre-generated fracture; and S6, obtaining a numerical model, obtaining an elastic strain energy distribution cloud picture of the overlying rock key layer, including an elastic strain energy distribution cloud picture of the key layer when the top is not cut and an elastic strain energy distribution cloud picture of the key layer of N groups of different drilling top cutting angles, and obtaining a required pre-splitting top cutting distance.

The invention discloses a comprehensive blasting method for controlling muck pile lumpiness and vibration in surface mine blasting, which comprises the following steps: S1, early-stage preparation and parameter calculation: investigating the geological condition of a mine in detail, and obtaining such information as rock physical and mechanical properties and joint fissure distribution; according to rock properties and mining requirements, blast hole parameters are determined; calculating initial delay detonation time according to a delay blasting rock breaking principle; s2, optimizing a charging structure: selecting a water medium interval charging structure, and determining the optimal unit consumption through theoretical analysis and field test; and based on the optimal unit consumption, establishing three-dimensional models of different water medium interval charging structures by adopting numerical simulation software, and selecting the optimal water medium interval charging structure. According to the method, the muck pile lumpiness is effectively controlled; the blasting vibration intensity is reduced; the blasting quality and the economic benefit are improved; the adaptability is high.

A detonator housing facilitates assembly of detonator components of a perforating gun. In an example, the detonator housing comprises a housing body configured for coupling to a charge tube of a perforating gun. A detonator receptacle is formed on the housing body for receiving a detonator. A detonating cord receptacle is formed on the housing body adjacent the detonator receptacle for receiving an end portion of a detonating cord in an overlapping relationship with the detonator. A detonating cord stop is formed on the detonating cord receptacle to limit an insertion depth of the detonating cord within the detonating cord receptacle.

The invention provides a blasting control method for simultaneously creating a free surface in advance by front-row holes in a slag pressing blasting area, which comprises the following steps of: arranging front-row blast holes and rear-row blast holes: arranging the front-row holes in the slag pressing area along a free surface direction, arranging rear-row holes in a main blasting area, and arranging according to a preset hole distance, a preset row distance, a preset hole depth and a preset charging coefficient; the front-row holes are set to be at the same detonation moment, so that synchronous detonation of the front-row holes earlier than that of the rear-row holes is achieved, the same multi-section charging is conducted in the blast holes of the front-row holes, and multi-section detonator detonation can be conducted in the same high-frequency millisecond detonation mode; setting delayed detonation of the rear row holes: setting the detonation moment of the rear row holes to be 10-20ms after the last section of detonation moment of the adjacent front row holes; and detonating implementation: detonating control is carried out by adopting a blasting network established by digital electronic detonators. According to the method, a continuous and stable free surface can be formed in the slag pressing blasting area, the crushing effect of follow-up blasting is improved, and the boulder yield is reduced.

The invention relates to the technical field of blasting charging devices, in particular to a surface mine pre-splitting blasting parameter design method which comprises the following steps: acquiring P-wave velocity and differentially constructing a stiffness sequence, mapping a hole depth axis to identify a sudden change area, monitoring displacement and crack rate to extract triaxial deformation, identifying an unstable rock section and setting a charging section. According to the method, the P-wave speed is obtained, differential processing is carried out on the P-wave speed, the P-wave speed is converted into the rigidity gradient change rate, the rigidity gradient change rate is mapped to a hole depth axis recognition sudden change area, crack propagation and hole wall displacement are monitored, and an unstable rock stratum is positioned; and three-axis deformation is extracted to enhance prediction precision, a charging section is set, the dosage is calculated, the energy release efficiency is optimized, and blasting interference optimization is carried out by combining the time delay difference and the inter-hole included angle division distance.

The invention provides a laser plasma sound barrier and magneto-rheological antiknock array collaborative protection method. The method comprises the following steps: firstly, constructing a collaborative protection structure consisting of a laser plasma sound barrier layer and a magneto-rheological antiknock array layer; a shock wave leading signal is detected in real time and input into a preset multi-dimensional feature model, the model dynamically generates a protection strategy, and a sound barrier instruction and an anti-explosion instruction are output respectively. The laser plasma sound barrier layer outputs specific reverse sound waves according to a sound barrier instruction and attenuates shock waves through destructive interference; meanwhile, the magneto-rheological anti-explosion array layer instantaneously solidifies a magnetic field according to an anti-explosion instruction, and shock wave energy is efficiently absorbed. According to the laser plasma sound barrier and magneto-rheological anti-explosion array cooperative protection method provided by the invention, the cooperative protection structure and the preset multi-dimensional feature model are constructed, so that the cooperative effect of the sound barrier and the anti-explosion array is realized, the response speed to shock waves is increased, the energy processing efficiency is improved, and the adaptability and reliability of protection are enhanced.