561 results about "TEX-explosive" patented technology

The invention belongs to the technical field of underground blasting, and discloses a blasting parameter screening method and system in one-time well completion blasting of a blind raise. The method comprises the steps that a slotting mode is determined, and then the slotting mode, the number of empty holes, the hole distance between the empty holes and charging holes and the filling length parameters are determined; explosive load calculation, wherein reasonable explosive loads and non-coupling coefficients of the slotting holes and the peripheral holes are determined according to numerical simulation calculation and blasting funnel test results; delay time is determined, the optimal influence time of inter-hole delay on the explosion stress wave superposition effect is calculated in a numerical simulation mode, and the damage effect of stress waves on rocks is optimal; and filling and charging are conducted, due to the fact that upward non-coupling charging is adopted, a reasonable charging mode is determined to ensure the accuracy of the charging amount and the explosive position, and reasonable filling is set to ensure that the explosive energy fully acts on the exploded rock mass. The safety of well completion operation can be greatly improved; the maximum utilization of resources is realized, and the economic benefit is improved.

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 simulation method for evaluating damage of a concrete gravity dam under the action of an explosion load. The simulation method comprises the following steps: establishing geometric models of the concrete gravity dam, water and explosives, performing grid division on the geometric models, and dispersing units into particles to obtain a discretization model; giving material parameters, boundary conditions and contact to the discretization model, and setting a detonation point position and a detonation mode; coupling effects between the explosive and water, between the water and the concrete gravity dam and between the explosive and the concrete gravity dam are set; key information is initialized; a fluid-structure interaction force is calculated by adopting an asynchronous solution IHPD-SPH coupling method; an SPH solver is adopted to update the speed and density information of the fluid; an IHPD solver is adopted to update internal force and acceleration information of the solid; checking whether the calculation duration is met or not, and if yes, ending calculation; if not, recalculating the fluid-solid coupling force according to the currently obtained particle state; and obtaining a dam damage result, and performing damage grade evaluation.

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 drilling, deslagging, charging and blocking integrated device, which belongs to the technical field of tunnel engineering and open-air engineering blasting equipment, and comprises a mobile vehicle body, a multi-link structure, a drilling and deslagging device, an explosive filling device and a stemming blocking device. The drilling and deslagging device is used for drilling and discharging drilling cuttings; and the explosive filling device independent track is arranged above the drilling machine beam track in parallel and is used for accurately conveying detonators and emulsion explosives into holes. After drilling is completed, the explosive filling device moves downwards in parallel to be aligned with the hole site for charging; after charging, the device moves upwards to drive the stemming plugging device to reach an orifice, and drilling cuttings discharged by drilling are directly used as stemming raw materials for automatic compaction and plugging. The problems that in the traditional blasting construction process, equipment is frequently switched, the manual operation efficiency is low, high-risk link manual operation needs to be conducted, and stemming raw materials need to be prepared independently are solved, automatic continuous operation of the whole process of drilling, charging and plugging is achieved, and the construction efficiency and intrinsic safety are remarkably improved.

The invention relates to the technical field of blasting construction, and particularly discloses a tunnel back break intelligent control method which comprises the following steps: S1, scanning a tunnel face to be blasted to generate high-precision point cloud data; s2, constructing a tunnel face BIM model according to the high-precision point cloud data, and performing space coordinate registration; judging whether blasting is carried out for the first time or not, and if blasting is not carried out for the first time, displaying a blast hole of last blasting on the tunnel face BIM model; s3, receiving input of blast hole space coordinate data of the blasting, and creating blast holes of the blasting on the tunnel face BIM model according to blast hole space coordinates; s4, installing an intelligent laser projector in the tunnel; s5, a reference control point is arranged on the arch crown of the tunnel, projection parameters are calculated, and blast holes of the blasting on the tunnel face BIM model are projected to the actual tunnel face; and S6, drilling is conducted according to the projection, explosives are installed, and blasting is conducted. By the adoption of the technical scheme, the blast hole layout change can be accurately positioned, and the blasting precision is improved.

The invention relates to an efficient shaped charge blasting charging device for tunnel smooth blasting, and belongs to the field of tunnel shaped charge smooth blasting. The device comprises an energy gathering pipe I and an energy gathering pipe II, the two ends of the energy gathering pipe I are an end A and an end B, the two ends of the energy gathering pipe II are an end A'and an end B ', the end A of the energy gathering pipe I is close to a blast hole opening, the end B of the energy gathering pipe I is fixedly connected with the end A' of the energy gathering pipe II through a positioning plate, and the end B 'of the energy gathering pipe II is fixedly connected with the end A' of the adjacent energy gathering pipe II through a positioning plate. A filling fixing bag, a water bag, conventional explosives and energy-gathered explosives are sequentially arranged in the energy-gathered pipe I from the end A to the end B, and conventional explosives and energy-gathered explosives are sequentially arranged in the energy-gathered pipe II from the end A'to the end B '; an industrial electronic detonator is inserted into the energy-gathered explosive of the energy-gathered tube II located at the bottom of the blast hole, and a leg wire of the industrial electronic detonator sequentially penetrates through the centers of the energy-gathered tube II and the energy-gathered tube I from the bottom of the blast hole to an orifice. The charging stability and the forming effect of the tunnel smooth blasting peripheral holes can be improved, the construction cost is reduced, and the construction efficiency is improved.

The invention relates to the technical field of arc shaped energy-gathered blasting parameter design, and provides an arc shaped energy-gathered blasting parameter design method under a complex crustal stress condition, which comprises the following steps: establishing a double-hole blasting three-dimensional model comprising a rock mass, an arc explosive, an energy-gathered pipe and coupled air, applying a crustal stress boundary condition and carrying out stress initialization; setting material model parameters based on the test data; performing fluid-structure interaction dynamic response numerical simulation on the model by adopting LS-DYNA to obtain stress and strain response caused by blasting; and establishing evaluation indexes based on tensile stress, compressive stress and through crack formation, carrying out sensitivity analysis and optimization adjustment on key blasting parameters such as blast hole spacing, delayed detonation time, explosive loading amount and coupling coefficient, and finally determining an optimal blasting parameter combination in different stress states. The method can effectively meet the blasting operation requirement under the complex ground stress condition, the presplitting quality and the rock mass stability are remarkably improved, and the method has wide engineering application prospects.

The present invention discloses a mobile device for safely unblocking a mine chute in the field of mining machinery technology, comprising: a mobile device, an explosives mounting assembly is provided on the mobile device, the explosives mounting assembly includes a telescopic rod; a winding wheel is provided on the telescopic rod, and the winding wheel is provided with a flexible connecting member for driving the telescopic rod to extend; a rope reel is provided on the explosives mounting assembly for driving the winding wheel to rotate; the rope reel includes a rope reel body, a spline shaft slidingly arranged on the rope reel body, a first drive assembly for driving the spline shaft to slide, and a second drive assembly for driving the spline shaft to rotate; the present invention drives the shift fork to rotate by the driving member, so that the shift fork moves with the spline shaft to the inside of the rope reel body, realizes the retraction of the spline shaft to separate from the winding wheel, and through the above method, the rope reel itself has the function of separating from the external winding wheel, does not rely on external facilities, and reduces the probability of the rope reel and the winding wheel being unable to be separated.

The invention relates to the technical field of blasting, in particular to a method and system for eliminating rockburst through excavation blasting energy, and a finite element numerical calculation model of a tunnel is constructed through simulation modeling. And then determining the influence of the blasting energy to control the aperture of the gun barrel on the blasting process in the model, and further adjusting the aperture ratio in different directions, thereby realizing the accurate control of the blasting energy, further presplitting the deep surrounding rock, and achieving the purpose of eliminating the risk of rock burst. The blasting energy control gun barrel is designed around the explosive, the hole diameter of one side of the tunnel surrounding rock and the hole diameter of one side of the volley face in the tunnel are adjusted, the spreading direction and strength of the blasting energy are accurately controlled, and therefore the purposes of increasing surrounding rock cracks and reducing the rock burst risk are achieved. According to the method, the rockburst risk can be effectively eliminated, the blasting efficiency can be improved, the construction cost is reduced, and remarkable technical advantages and economic benefits are achieved.

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 provides a simulation material for a mechanical test of a press-fitting explosive, which is prepared from the following raw materials in parts by weight: 65.5% of ammonium sulfate, 27%-33% of aluminum powder, 1.5%-4% of microcrystalline wax, 1%-2% of butadiene rubber and 0.2%-0.8% of graphite. The compressive strength and the tensile strength of a grain formed by pressing the simulation material for the mechanical test of the pressed explosive are basically consistent with those of a grain formed by pressing a polyblack aluminin-2 (JHL-2) explosive, the change trend and the change limit of the strength in the mechanical test process can be truly reflected, and effective reference data are provided for mechanical property evaluation; relatively real and reasonable model parameters are provided for the digital design of the mechanical property of the press-fitting explosive; in an aging test, a tensile test, a mechanical compression test and a dynamic Brazilian test, the simulation material for the press-fitting explosive mechanical test can be prevented from being in contact with energetic explosive components, so that the safety of the test is improved, and the potential safety hazard is reduced.

A downhole system for conveying an explosive tool within a wellbore and reducing damage to other tools of the downhole system. The downhole system comprises a downhole tool string configured for conveyance within a wellbore, wherein the downhole tool string comprises upper tools, a lower tool comprising an explosive charge, and a sub between the upper tools and the lower tool. The sub is configured to attenuate a shock wave caused by the explosive charge when detonated to thereby reduce damage to the upper tools caused by the shock wave. The sub comprises an axial bore and a plurality of radial bores extending between the axial bore and a space external to the sub.

The invention relates to the technical field of geological punching, and particularly discloses geological punching equipment for mining, which comprises driving equipment capable of three-dimensionally adjusting, a mounting disc is fixedly mounted at the bottom end of the driving equipment, and a middle shaft is rotatably mounted in the mounting disc; and a rotating cylinder arranged outside the middle shaft in a sleeving mode is rotationally installed in a groove formed in the bottom end of the installation disc, a drill bit is fixedly installed at the end, extending out of the rotating cylinder, of the middle shaft, a spiral conveying groove is formed in the outer wall of the drill bit, and a soil inlet gap is formed between the rotating cylinder and the drill bit. According to the device, the soil inlet gap is formed between the drill bit and the rotating cylinder, so that muck generated during drilling of the drill bit enters the rotating cylinder, the muck is conveyed out of a blast hole along the rotating cylinder through the spiral piece, and the muck can be conveyed in a dry-type soil moving mode; and the phenomenon that the explosion performance or the explosion effect of explosives in the blast hole is affected by too high water content in the blast hole after slurry circulation is avoided.

The present invention discloses a method for correcting explosive initial conditions for numerical simulation of underwater explosions. The explosive is approximated as a sphere, and a computational model for a free-field spherically symmetric underwater explosion is established. Initial parameters of the explosive, including initial density and initial internal energy per unit mass of the explosive, are input into the JWL equation of state to obtain preliminary pressure-time curves at different spatial positions. The peak value of the shock wave pressure is extracted and compared with the results of an experiment or empirical formula. If the error does not exceed 5%, the initial internal energy per unit mass of the explosive is maintained unchanged; otherwise, the initial internal energy per unit mass of the explosive is adjusted until the error does not exceed 5%. The bubble pulsation period is determined and compared with the results of an experiment or empirical formula. If the error does not exceed 5%, the initial density of the explosive is maintained unchanged; otherwise, the initial density of the explosive is adjusted until the error does not exceed 5%. The present invention can accurately predict the peak value of the shock wave pressure and the bubble pulsation period, has the advantages of low cost and high efficiency, and can provide more accurate load input for the calculation of three-dimensional underwater explosion models.

The invention discloses a pulse excitation device for structure testing, and relates to the technical field of bridge engineering detection, the pulse excitation device comprises a steel cylinder outer cladding layer, a flange plate and a damping cushion layer, the damping cushion layer is connected with the flange plate through a bolt, and the flange plate is welded with the steel cylinder outer cladding layer. According to the pulse excitation device for the structure test, the explosive is detonated through the blasting fuse, an ideal single pulse load is formed by instantaneous counter-acting force generated when high-pressure gas generated at the moment of explosion of the explosive ejects water at a high speed, and parameters such as the damping ratio, the dynamic impact effect, the natural vibration frequency and the dynamic response of a bridge structure are measured. The shock excitation device does not generate vibration except single impulse force on a bridge structure, the impulse energy is controlled by adjusting the explosive loading amount, the impulse force peak value and the impulse time are controlled by adjusting the water amount and the damping characteristics of the damping cushion layer, and the test accuracy is improved.

The invention relates to an explosive shock wave absorbing structure and a design method, and relates to the technical field of underground mine mining, the wave absorbing structure comprises a core wave-blocking rock and a roadway arranged with the core wave-blocking rock as the center, the core wave-blocking rock is a right triangle or obtuse triangle, one side of the corner with the largest angle is an explosive warehouse connecting roadway, and the other side of the corner with the largest angle is an explosive warehouse connecting roadway. The explosive warehouse connection lane is connected with the underground explosive sub-warehouses, the explosive warehouse connection lane serves as an inlet end of explosive shock waves of the explosive warehouse, the two edge sides and the opposite edge side connected with the corner, with the largest angle, of the triangular structure of the core wave blocking rock serve as shock wave gas buffering lanes, and a safety lane connection lane is arranged at the midpoint of the opposite edge of the corner with the largest angle. Through the engineering arrangement of the explosion shock wave absorbing structure, shock waves generated by accidental explosion of an underground explosive warehouse can be absorbed, so that the effect of protecting main roadways, personnel and equipment at the output end position is achieved.

The invention provides a detonation pressure optical testing device for a micro-dose powdery explosive, which comprises a rotating mirror type scanning camera and an explosive detonation unit, and is characterized in that the rotating mirror type scanning camera is used for collecting a shock wave motion trail image when the powdery explosive is detonated; the explosive detonating unit comprises an organic glass column body and a high-pressure exploder, an explosive charging hole with an open top is formed in the organic glass column body in the axial direction, a stress wave adjusting rod is arranged in the explosive charging hole in a penetrating mode, and the bottom face of the stress wave adjusting rod can make contact with powdery explosives charged into the explosive charging hole; a first detonating hole and a second detonating hole are coaxially formed in the organic glass column body in the radial direction, and both the first detonating hole and the second detonating hole communicate with the charging hole; the heating wire penetrating through the first detonating hole, the charging hole and the second detonating hole can make contact with the powdery explosive in the charging hole, and the two ends of the heating wire are connected with the positive electrode and the negative electrode of the high-pressure exploder correspondingly. According to the invention, a traditional detonation mode is not needed, the interference of the detonator and the explosion expanding explosive on the measurement process of the sample with the small explosive quantity is solved, and the test convenience and the test precision are improved.

According to the pneumatic skin shape correcting device and method, a female die and a base of the shape correcting device have an interlocking function in a natural state, and the shape correcting device has the functions of providing ultrahigh pressure edge tonnage and releasing ignition sparks by means of magnetic force transmission under the condition that a coil is powered on; explosive is placed in the shape correcting device, a coil is electrified to magnetize the shape correcting device, magnetic force transmits magnetic induction to promote the magnetic induction switch to discharge and detonate the explosive, and high-temperature and ultrahigh-pressure gas is instantly generated to impact the inner surface of the semi-finished product; and after explosion, the coil is continuously electrified, the female die and the base are magnetized to generate ultrahigh pressure edge tonnage to seal explosion heat energy, and the high-pressure retention time is prolonged, so that inner surface layer materials of a semi-finished product are compacted through hot pressing, the grain ultrafine area is microscopically shrunk, and surface tension for counteracting springback is formed. The method has the remarkable advantages of high load, low energy consumption, high speed and the like, and can overcome the problem that the large pneumatic aluminum alloy skin is limited by a series of factors such as the solid solution inoculation period, the equipment table top and the tonnage and is poor in die attaching precision.

The invention relates to the technical field of engineering blasting, and discloses a blast hole wall impact pressure indirect measurement device, which comprises an external fixed steel pipe, a blast hole wall is arranged in the external fixed steel pipe, a blocking material is arranged at the opening end of the external fixed steel pipe, and the external fixed steel pipe is used for transmitting and attenuating the explosion pressure borne by the blast hole wall; the energy source is arranged in an inner cavity of the external fixed steel pipe, and the energy source is an explosive cartridge or a liquefied air energy storage pipe; the detonating equipment comprises an electronic detonator and an electric lead, the electronic detonator is pre-buried in the explosive cartridge or the liquefied air energy storage tube, and the electronic detonator is connected with an external exploder through the electric lead; the strain gauges are fixedly connected to the outer wall of the external fixing steel pipe, and a pressure testing system is arranged outside the external fixing steel pipe. According to the invention, the strain gauges are fixed on the outer wall of the external fixed steel pipe, and the steel pipe is used as a medium for pressure transmission and attenuation, so that the impact pressure generated by explosion is greatly reduced.

The invention discloses a cut blasting method, and relates to the technical field of tunneling, a first cut hole extends from a rock mass area related to a current excavation cycle to a rock mass area related to a next excavation cycle, after a first excavation cycle is completed, a sub-surface has a temporary cavity in each subsequent excavation cycle process, and a second cut hole extends from the rock mass area related to the next excavation cycle to the rock mass area related to the next excavation cycle. The crustal stress on the boundary of the temporary cavity is released to cause the crustal stress redistribution of the rock mass in the region involved in the next excavation cycle, so that the temporary cavity forms a pressure stress concentration region in the minimum principal stress direction, and the strength of the rock mass in the region involved in the next excavation cycle is reduced; the temporary cavity and the rock mass damage area can be used for assisting in completing rock breaking excavation in the subsequent excavation cycle, and the amount of explosives needed in the whole excavation process is reduced; and the blasting parameters of the slotting hole group required by the next excavation cycle can be adjusted in a targeted manner according to the geometric parameters, so that the problem that the slotting area is formed too large or too small due to blind reduction of the explosive quantity is solved, and the forming quality of the slotting area is ensured.

The invention discloses a presplitting blasting structure and method for an anti-tilting broken slope. The presplitting blasting structure comprises a presplitting hole and an empty hole. The pre-splitting holes are arranged in a row on the designed boundary side slope line, and the empty holes are arranged between the adjacent pre-splitting holes; the presplitting holes are filled with explosives, and the empty holes are not filled with the explosives. According to the method, the unevenness of the pre-splitting surface is avoided, it is guaranteed that a smooth wall surface is formed more easily after pre-splitting blasting, the problem that the slope is unstable due to the fact that blasting vibration damage is large, slope treatment is difficult, and the rock breaking lumpiness is large is solved, the production task can be completed more safely and efficiently, and the production efficiency is improved. The technical process is simple, the implementation is convenient, the cost is low, the presplitting effect is good, the slope treatment investment is low, a large amount of capital investment can be saved, and the ore supply problem that the lower ore body cannot be exposed due to limit suppression for a long time is solved; the problem that the reserved slope surface is prone to being damaged by traditional presplitting blasting is solved to the maximum extent, and the method is particularly suitable for slope presplitting blasting of counter-tilting strata in surface mining.

The utility model discloses a tunnel smooth blasting charging device which comprises a frame, a top plate, a charging assembly and an adjusting assembly, at least one straight barrel is arranged on the frame, a guide rod is movably inserted into the straight barrel, the top plate is fixedly connected to the top of the guide rod, a sliding way and a first electric cylinder body are arranged on the top plate, and the sliding way is used for containing explosives. A movable rod of the first electric cylinder body is connected with a pushing piece through a connecting rod, the pushing piece is located in the sliding way, the explosive loading assembly comprises a truss and a second electric cylinder body which are installed on the top plate, the truss is connected with a storage barrel through a movable part, a movable rod of the second electric cylinder body is connected with a pushing plug, and the second electric cylinder body can drive the pushing plug to extend towards an inner cavity of the storage barrel. The adjusting assembly is used for adjusting the storage cylinder to transversely align to the push plug or the slideway; manual charging is not needed, the charging efficiency is effectively improved, the charging depth can be controlled according to needs, and when multiple sets of explosives are charged, the distance between the explosives in the smooth blasting hole is controlled.

The invention provides an optimized charge over-excavation comprehensive control construction method based on rock parameter acquisition. The optimized charge over-excavation comprehensive control construction method comprises the following steps that S1, the uniaxial saturated compressive strength Rc or the rock firmness coefficient f of surrounding rock of a tunnel face is judged; s2, determining the excavation footage according to the uniaxial saturated compressive strength Rc or the rock firmness coefficient f; s3, according to the uniaxial saturated compressive strength Rc or the rock firmness coefficient f, a mother plate is arranged in an adaptive blast hole mode; s4, determining a blast hole arrangement diagram according to the uniaxial saturated compressive strength Rc or the rock firmness coefficient f; s5, determining a charging mother set according to the uniaxial saturated compressive strength Rc or the rock firmness coefficient f; s6, the final explosive loading amount is determined according to the uniaxial saturated compressive strength Rc or the rock firmness coefficient f; through the relation curve between the surrounding rock strength parameter and the explosive dosage, construction is guided to reasonably match and optimize the total explosive dosage, the peripheral hole medication and the auxiliary hole medication, and the purpose of reducing the over-excavation and over-consumption of drilling and blasting tunnel excavation is achieved.

The invention discloses a phosphorite mining method which comprises the following steps: constructing and cutting an uphill along a top plate of an ore body from a lower layered gate way to an upper layered gate way, and supporting by adopting a resin anchor rod, a reinforcing mesh and a mining anchor cable; cutting groove construction is conducted, medium-length holes are formed in the lower layered gate way, explosives are loaded in the medium-length holes to conduct blasting layer by layer, a cut uphill bottom plate is continuously lowered till an ore body bottom plate is reached, and the cutting grooves are formed; fan-shaped medium-length holes are constructed in the lower layered gate way, a plurality of rows of fan-shaped medium-length holes are formed in the vertical direction, a plurality of holes are formed in each row of fan-shaped medium-length holes in the vertical direction, blasting is conducted with the cutting groove as a vertical free face, and the fan-shaped medium-length holes are blasted in batches; and charging powder in the lower layered roadway, and after blasting, entering a stope by adopting a remote control forklift for ore removal. The vertical free surface blasting technology is adopted for blasting the medium-length holes in batches, and the method has the advantages that the top plate operation safety is improved, the mining period is shortened, and the ore recovery rate is increased.

The invention relates to the technical field of data processing, and discloses a high-confining-pressure blasting model test method and system for simulating a single-free-surface clamping effect. The method comprises the following steps: preparing a single-free-surface model sample with a preset blast hole by regulating and controlling the proportion of cement mortar, performing three-way constraint loading by utilizing a hydraulic confining pressure system to form a stable clamping state, and filling trace explosive and blocking and sealing the hole to construct a complete blasting model. Multi-parameter synchronous monitoring is adopted to collect vibration waveform and confining pressure change data, and a time-frequency domain analysis algorithm is applied to identify a single free surface clamping effect and obtain blasting failure mode parameters under the influence of confining pressure. The technical problem that an existing blasting model test cannot accurately simulate the single-free-surface clamping constraint condition of underground engineering and cannot quantitatively recognize the influence rule of confining pressure on a blasting failure mode is solved.

The invention provides a BIM-based open bench blasting blast hole fine charging design optimization method, and relates to the technical field of electric digital data processing, and the method comprises the following steps: collecting related characteristic parameters of a blasting project; establishing a blasting wave and range mathematical model, and outputting a blasting wave and coefficient corresponding to the current initial explosive charge; acquiring the upper limit of the shock resistance margin of the explosive, collecting the average distance between adjacent blasting holes, and calculating the blasting coherence index by combining the blasting sweep efficiency; and setting a coherence threshold value, and comparing the blasting coherence index with the set coherence threshold value. According to the method, the blasting interference risk between the adjacent blast holes is quantitatively evaluated by introducing the blasting coherence index, and the problem of explosive load design deviation caused by the fact that a conventional scheme only depends on an empirical formula or static parameters is solved; and a closed-loop feedback optimization algorithm is adopted to automatically adjust the explosive load until a coherence threshold value is met, collaborative operation guarantee of the blasting sequence is realized, and the blasting safety and the resource utilization efficiency are remarkably improved.

The invention relates to a seismic wave cross-hole tomography detection boulder stratum underground diaphragm wall and a construction method. The construction method comprises the following steps of boulder detection, blasting pre-decomposition punching of a bead-shaped boulder stratum, pressure and air release covering of a top opening of a blasting hole, and wall brushing and groove cleaning through a square hammer. The method has the advantages that the seismic wave cross-hole tomography equipment is utilized, dense detection paths are formed in the measurement area, then the boulder distribution condition in the measurement area is calculated and deduced, the method has the advantages of being good in reliability, high in intuition and high in accuracy, and efficient and high-quality diaphragm wall construction is guaranteed; the blasting hole drilling construction is performed after the boulder position information in the diaphragm wall range is detected, and then the explosive is loaded according to a discontinuous method, that is, the explosive is only placed at the boulder position, so that the purpose of pre-blasting decomposition is achieved, the grooving progress is greatly improved, the construction difficulty is reduced, and the stability of the groove wall is effectively guaranteed.

The invention discloses a rock drilling and blasting method for forming a cutting groove at one time, which comprises the following steps: constructing different rows of semi-umbrella-shaped blast holes and the same row of semi-fan-shaped blast holes in inclined upward direction, gradually increasing the angles of the same row of blast holes from bottom to top, and fixing a position by a rock drilling machine to drill all the blast holes; the blast holes are filled with explosives, the charging coefficient is controlled to be 65%-85%, and the blocking length of every two adjacent blast holes is staggered; and the detonation sequence is set, and after detonation, the cutting groove is formed at a time. According to the method, the semi-umbrella-shaped blast holes and the same row of semi-fan-shaped blast holes are formed, all the blast holes can be drilled by the rock drilling machine only through one point position, the drilling machine does not need to be moved and fixed for multiple times, the rock drilling preparation time is saved, the rock drilling efficiency is greatly improved, the cutting grooves are formed through one-time blasting by setting different blasting sequences, and the cutting efficiency is improved. The circulating process of multiple times of charging, blasting and shoveling is omitted, and the blasting efficiency and the shoveling efficiency are improved.