102results about How to "Improve blasting effect" patented technology

The invention discloses a multi-sensor fusion tunnel smooth blasting monitoring system, and belongs to the technical field of artificial intelligence. The method comprises the following steps: preprocessing and integrating monitored data, constructing a tunnel digital model, and applying a static load and a dynamic load; obtaining a safety critical value of each parameter in the tunnel digital model to obtain a tunnel critical value digital model, extracting each parameter exceeding the safety critical value, generating a tunnel abnormal parameter digital model, and identifying an abnormal mode of smooth blasting by using a random forest algorithm; when the abnormal mode of smooth blasting is related to the interior of the tunnel, reconstructing a tunnel digital model; when the optimization suggestion is related to smooth blasting, new blasting parameters are obtained by using a support vector machine model in combination with expert suggestions; a tunnel-smooth blasting correlation model is constructed, correlation rules are identified, and the influence degree of blasting parameters on tunnel monitoring parameters is evaluated; and searching an optimal blasting parameter combination by applying particle swarm optimization to meet a set optimization target.

The invention relates to the technical field of hard rock stratum blasting construction, and discloses a hard rock stratum blasting excavation method and a blasting delay time calculation method. The technical problems that in the prior art, in underground engineering drilling and blasting method construction, harmful effects exist, vibration generated by blasting is difficult to control, the surrounding environment is affected, the blasting efficiency is low, the construction period is long, and the engineering cost is high are solved. The method comprises the following steps that the tunneling blasting delay time is calculated, and vertical shaft large-diameter empty hole underholing blasting is carried out; vibration reduction holes are formed in the tunnel and the vertical shaft and between the blast hole and the protection object; and tunnel driving blasting charge and vibration effect test are carried out. The technical level of hard rock stratum blasting excavation construction is improved, and fine design and construction of hard rock stratum blasting and control over harmful effects are achieved.

An intelligent construction method for strip mine blasting comprises the steps that a blasting area measuring system is used for measuring multiple steps and a stratum structure in a strip mine field blasting area, and a three-dimensional model of the blasting area is established according to measured data; a throwing blasting design system is used for obtaining three-dimensional model data of a blasting area, and a drilling arrangement scheme, blasting parameters and charging structure data of each step are designed; an intelligent drilling system of the drilling machine obtains a drilling arrangement scheme and moves to a preset planned drilling position for drilling operation according to the drilling arrangement scheme; the intelligent charging system obtains blasting parameters, charging structure data and a drill hole arrangement scheme, an explosive mixed charging truck is controlled to reach a drill hole position, and charging operation is carried out in a drill hole according to the blasting parameters and the charging structure data; after the charging operation is completed, rock stratum blasting operation and coal seam mining operation are carried out; according to the invention, the construction precision of throwing blasting drilling and charging links can be improved, the working intensity is reduced, the construction efficiency is improved, the blasting effect is improved, and the production cost is reduced.

The invention provides an open pit coal mine deep hole blasting control method and a related device, and relates to the technical field of software. A blasting record is called, wherein the blasting record comprises the second geological feature and the blasting scheme of the blasted area; the first geological feature and the second geological feature are matched to determine whether a target blasting area with the same geological type as the to-be-blasted area exists in the blasted area or not; and if the target blasting area exists, the blasting scheme of the target blasting area serves as a candidate blasting scheme of the to-be-blasted area, and the effect of the candidate blasting scheme is evaluated to generate the blasting scheme of the to-be-blasted area. According to the method, the blasting scheme with the same existing geological type can be optimized, and the blasting scheme suitable for the blasting is generated through effect evaluation, so that the blasting effect of deep hole blasting can be effectively improved, the production and safety requirements are met, and the purposes of reducing cost and improving efficiency are achieved.

The invention discloses a deep hole blasting method for a strip mine step, relates to the technical field of blasting engineering, and aims to solve the problems that an existing strip mine step blasting method is easy to cause excessive large blocks on a slope surface and on the front section of the step, so that the excavation difficulty and the transportation potential safety hazard are increased. The method comprises the steps that an inclined first main blast hole and a vertical second main blast hole are drilled in the end, close to the slope surface, of a step to be blasted; a first auxiliary hole crossed with the first main blast hole is drilled in the slope surface, and a second auxiliary hole is formed beside the first main blast hole of the step; charging each blast hole with explosives; all the blast holes are connected into a detonating network through detonating lines; detonating through an exploder; wherein the first main blast hole and the second main blast hole can be distributed in a quincunx shape, the second main blast hole is vertical, and each main blast hole comprises a filling section and a charging section. According to the method, the auxiliary holes are formed to solve the problem of insufficient explosion stress of the slope and the step front section, and the explosion effect is improved.

The invention discloses a directional fracturing device and a directional fracturing method.The directional fracturing device comprises a delay controller, a storage structure and a plurality of directional fracturing pipes, the storage structure is used for storing liquefied gas, the storage structure is connected with the directional fracturing pipes, and the directional fracturing pipes are connected with the delay controller. The directional fracturing pipe is used for introducing liquefied gas into the directional fracturing pipe, the directional fracturing pipe is provided with an energy release hole, the delay controller is electrically connected with the directional fracturing pipe, and the delay controller is used for igniting the directional fracturing pipe and controlling the detonating sequence of the directional fracturing pipe. According to the directional fracturing device and the directional fracturing method, liquefied gas phase change, precise delay blasting and the directional fracturing technology are combined, and more efficient and safer blasting operation can be achieved.

The invention discloses a paste emulsion matrix for upward hole blasting, a paste emulsion explosive and a method of the paste emulsion matrix and the paste emulsion explosive, and relates to the technical field of industrial explosives, a water-in-oil type paste emulsion matrix is prepared by mixing a specially-made oil phase solution and a specially-made water phase solution in an emulsifier. When an upward blast hole is filled with the paste emulsion matrix by a charging truck on an underground construction site, and the matrix and a specially-made lubricant are conveyed to a conveying pipe orifice by a conveying pipeline together, the paste emulsion matrix and the lubricant are mixed uniformly by a static mixer, so that the paste emulsion matrix is formed. At the moment, the pasty emulsion matrix and active substances in the lubricant are subjected to partial cross-linking reaction to form a thicker pasty emulsion explosive which is attached to the inner wall of the blast hole. The method has the advantages that hole returning is avoided, cost is saved, and the blasting effect is good.

The invention discloses a colloidal emulsion explosive with high storage stability and a preparation method thereof. The raw materials for preparing the emulsion explosive comprise ammonium nitrate, calcium nitrate, water, a compound emulsifier, compound wax and a special foaming agent. Wherein the composite emulsifier is a modified span-80 composite emulsifier obtained by carrying out esterification reaction on an anionic carboxylate emulsifier and multiple hydroxyl sites of span-80, and the composite emulsifier has high molecular weight, so that the space volume of a lipophilic group is increased, and an interfacial film is tighter; the special foaming agent is composed of sodium nitrite, zinc nitrate, gelatin peptone, Tween 80, phosphoric acid, urea and water, the gelatin peptone is a green pure natural raw material, the surface tension of an emulsion matrix is effectively reduced, the contact area of the foaming agent and the emulsion matrix is increased, the foaming efficiency is catalyzed by zinc nitrate, and bubbles are good in stability and not prone to escaping due to Tween 80. The use of the compound emulsifier and the special foaming agent improves the blasting performance and storage stability of the emulsion explosive.

The invention belongs to the technical field of rock mass hardness detection, and particularly discloses an anchor rod drill carriage system and method capable of rapidly detecting rock mass hardness, and the system comprises an anchor rod drill carriage which comprises an anchor rod drill carriage body, a drilling unit arranged on the anchor rod drill carriage body, and a while-drilling parameter monitoring unit arranged on the drilling unit; the data processing module is configured to be used for obtaining while-drilling parameters and conducting data processing, the rock mass hardness and the blast hole distance are finally obtained, and on-site rock mass blasting effect optimization is achieved; according to the method, the rock mass hardness can be rapidly detected while drilling on the basis of the parameters while drilling, and the detection efficiency is improved; according to the rock mass hardness, the number and spacing of the blast holes in the sub-areas of different blasting grades are determined, the spacing of the blast holes in the different sub-areas is optimized, field blasting design is guided, the problem that too many or too few blast holes are formed is solved, and therefore the blasting effect is optimized.

The coal mine thick and hard roof upward ultra-deep hole blasting energy-gathered grain structure comprises a grain body, a first connecting assembly is arranged at the top end of the grain body, and a second connecting assembly is arranged at the bottom end of the grain body; a clamping table is arranged at the top end of the first connecting assembly, and a clamping jaw capable of being connected with the clamping table in a matched mode is arranged at the bottom end of the second connecting assembly. The first connecting assembly and the third connecting assembly are each provided with an anti-skid claw used for making contact with the inner wall of a blast hole to achieve the anti-skid effect. The invention further discloses an upward ultra-deep hole blasting energy-gathered combined grain for the thick and hard coal mine roof. According to the explosive column structure, through the arrangement of the anti-skid claws, the explosive column structure can be fixed to the inner wall of a blast hole, the probability that the explosive column structure slides down in the blast hole is reduced, and then the blasting effect is improved; and through the arrangement of the first connecting assemblies and the second connecting assemblies, the adjacent grain bodies can be connected in a buckled mode, the generation probability of the distance between the adjacent grains is reduced, and the upward ultra-deep hole blasting effect is improved.

The utility model relates to the technical field of engineering blasting, in particular to a presplitting blasting energy gathering pipe device which comprises a tray and an energy gathering pipe, a rectangular clamping plug is fixedly installed in the center of the upper portion of the tray, the presplitting blasting energy gathering pipe device is reasonable and compact in structure and convenient to use, the clamping plug and a clamping groove are arranged, and the width of the clamping plug is consistent with that of the clamping groove. During installation, the clamping plug on the upper portion of the tray is clamped in the clamping groove, so that the energy gathering pipe can be fixed to the center of the tray, and deviation of the energy gathering pipe is prevented. During charging, a detonating cord is laid on the side, close to the energy gathering hole, in the energy gathering pipe, and then the cartridge bag is plugged into the energy gathering pipe from the upper end of the energy gathering pipe, so that the cartridge bag can be conveniently and quickly mounted; the front end of the energy-gathering pipe is provided with a front-back through opening, and the rear part of the energy-gathering pipe is provided with a plurality of front-back through energy-gathering holes at intervals up and down, so that an energy-gathering effect can be generated during blasting, and the blasting effect of explosives in the axial direction of the holes during blasting is enhanced; the problems that an existing presplitting blasting device is inconvenient in charging and not ideal in blasting effect can be effectively solved.

The invention discloses a drilling blasting explosive energy transfer mode design and a data simulation method thereof, and relates to the technical field of blasting engineering.The drilling blasting explosive energy transfer mode design method comprises the steps that a rock sample is manufactured, mechanical parameters of the rock sample are tested, and the type of the rock is determined; respectively carrying out bursting tests on the multiple groups of rock samples; measuring, contrastively analyzing the average crushing particle size, the boulder rate and the total seismic wave energy of the central areas of the multiple groups of rock samples; establishing an explosive blasting energy transfer evaluation system, and determining an explosive column installation scheme; the data simulation method comprises the following steps: determining a blasting energy attenuation coefficient, an eccentric influence factor and an explosive energy transfer coefficient of a rock sample; establishing a blasting explosive energy transfer model and an explosive explosion energy density calculation formula; verifying and correcting an explosive explosion energy density calculation formula; the blasting effect can be predicted, the on-site trial blasting frequency is reduced, and the cost is reduced.

This application relates to the field of food processing technology, specifically disclosing a freeze-resistant lava-filled popping bead, its preparation method, and its application. The freeze-resistant lava-filled popping bead comprises an inner core liquid, a popping bead wall material liquid, a curing liquid, and a storage liquid. The inner core liquid comprises the following raw materials in parts by weight: 80-120 parts white sugar, 3-6 parts calcium salt, 30-60 parts edible alcohol, and 41-68 parts water. The preparation method is as follows: white sugar, calcium salt, edible alcohol, and water are mixed until dissolved to obtain the inner core liquid; alginate, glycerin, pectin, and acidic substances are mixed with water until dissolved to obtain the popping bead wall material liquid; calcium salt, chitosan, and water are mixed evenly to obtain the curing liquid; fructose syrup, edible alcohol, and water are mixed evenly to obtain the storage liquid; the inner core liquid is added dropwise to the popping bead wall material liquid for a coating reaction; excess adhesive is filtered out and washed away; the bead is then placed in the curing liquid and the storage liquid in sequence; after packaging and high-temperature sterilization, the finished product is obtained. It has the advantage of bursting and lava-filled core when eaten frozen.

The invention discloses a carbon dioxide blasting testing device and a testing method thereof. Relates to the technical field of carbon dioxide blasting rock breaking mechanism research. The device comprises a carbon dioxide cracking device assembly, a multi-module experiment platform, a data acquisition system, a medium temperature capturing assembly and a multi-channel synchronous control assembly; the simulated blast hole and carbon dioxide fracturing device assembly is used for being clamped on the adjustable base bracket; the data acquisition system is used for acquiring internal pressure and temperature changes of the fracturing device pipe body and displaying various data monitoring results; the medium temperature capturing assembly is used for capturing the medium temperature change at the orifice of the simulated blast hole and displaying each data monitoring result; the multi-channel synchronous controller is connected with the high-energy exploder through a data line, the data acquisition system is connected with the multi-channel synchronous controller through a data line to acquire signal indication starting to be acquired, the structure is simple, use is convenient, and a theoretical basis with practical significance is provided for liquid carbon dioxide phase change explosion field practice.

The embodiment of the present invention provides a rock mass directional fracturing device and a rock mass directional blasting method, which relates to the field of mining engineering blasting. It includes: a main pipe, a heating rod, a filling head and an adapter; the filling head is connected to the first end of the main pipe, the adapter is connected to the second end of the main pipe, and a first terminal is provided on the adapter; a filling channel for filling carbon dioxide into the main pipe is provided on the filling head, and a needle valve for opening and closing the filling channel is provided in the filling channel; the heating rod includes a base and a paper tube provided on the base, a hole is reserved on the base, a second terminal is provided in the hole, the second terminal extends in the paper tube, a threading hole is provided at one end of the paper tube away from the base, a wire is provided on the second terminal, and one end of the paper tube is located in the paper tube, the wire is axially arranged in the paper tube, and is led out from the threading hole to the second terminal of the adapter; a groove is also provided in the axial direction of the side wall of the main pipe. It is convenient to realize the directional blasting of the rock mass, thereby improving the blasting effect.

The invention relates to the technical field of mine engineering, and provides a vertical shaft expanding excavation method based on deep hole drilling and segmented blasting, which comprises the following steps of: 1, drilling a first part of a mine by using a hydraulic drill with the hole depth of 10m so as to ensure the hole forming precision; 2, a hand pneumatic drill is used for drilling peripheral holes in the first part of the mine, the hole depth is 3.3 m, and the circulating footage is 3 m; step 3, filling the unexploded part of the drilling hole of the hydraulic drill with fine sand; fourthly, a winch is used for lifting the manned anti-falling cage and the protective large plate through the portal frame, and personnel and materials are conveyed; according to the technical scheme, the technology that the pneumatic drill is combined with the hydraulic drill is adopted, the advantages of the pneumatic drill under the complex geological condition are brought into play, the high efficiency of the hydraulic drill is utilized, and therefore the drilling efficiency and quality are improved, meanwhile, through the deep hole drilling segmented blasting technology, the drilling process is more accurate, errors are reduced, and the drilling efficiency is improved. And the drilling quality is further improved.

The utility model relates to the technical field of deep hole pre-splitting blasting, and discloses an anti-toppling positioning instrument for medium-deep hole pre-splitting blasting, which comprises a fixing mechanism and a supporting device, first sleeves are annularly and fixedly connected in the inner wall of a chassis at equal intervals, and a limiting mechanism is mounted in a limiting groove, so that the first sleeves are fixed on the inner wall of the chassis. At the moment, the sliding blocks extrude the supporting equipment to increase the distance between the supporting equipment, at the moment, a first spring is compressed, the first spring generates inward force on a mounting block, the mounting block drives the supporting equipment through a connecting rod to generate inward force, so that the supporting equipment clamps and fixes a limiting mechanism, and the energy gathering sleeve is further limited; meanwhile, a fixing mechanism and supporting equipment are plugged into the pre-splitting hole, a second spring is in an extension state, the second spring generates outward force on an extrusion block, the extrusion block drives a guide rod to extrude a fixing block, the fixing block extrudes the inner wall of the pre-splitting hole, and the situation that the energy-gathered sleeve inclines or topples over in the blasting process is avoided; and the blasting effect is further improved.

The application discloses a method, device and equipment for arranging blast holes in an underground mine and a storage medium. The method comprises: obtaining blast hole arrangement parameters, which represent parameter requirements related to blasting in the underground mine; generating a blast hole feasible region based on blast hole design accuracy, coordinates of a core point of a drilling machine, the blast hole arrangement parameters and a blasting space range of the underground mine, the blast hole feasible region comprising blast hole positions of a plurality of blast holes; obtaining a blast hole arrangement scheme based on the blast hole feasible region and a set blasting optimization model; and wherein the blasting optimization model takes the sum of error values between hole bottom distances of the blast holes and average hole bottom distances as an optimization target, and the blast hole arrangement scheme comprises target blast hole positions selected from the blast hole feasible region. The blast holes in the underground mine can be optimally arranged in combination with blasting boundary space constraints and parameter requirements related to blasting, thereby maximizing the uniformity of hole bottom distances between the blast holes.

A CO toxic product in-situ efficient elimination system is characterized in that a CO elimination mechanism comprises a first charging barrel, a second charging barrel and a third charging barrel and is filled with CO elimination agent particles; the movable fixing mechanism comprises a movable barrel, a supporting frame and a fixing assembly. The CO eliminating mechanism is sleeved with the movable barrel. The supporting frame comprises a first supporting plate, a second supporting plate and a supporting rod; the plurality of supporting rods are uniformly distributed on the outer side of the movable cylinder body and are respectively connected with the first supporting plate and the second supporting plate; the fixing assembly comprises a hinge block, a fixing pin and a limiting baffle. The multiple hinge blocks, the multiple fixing pins, the multiple limiting baffles and the multiple supporting rods are arranged in a one-to-one correspondence mode. The pressure relief mechanism comprises a connecting cover, a first elastic assembly, a front end plate, a second elastic assembly, a rear end plate and a third elastic assembly. The system is ideal in CO elimination effect and high in elimination efficiency, can eliminate toxic and harmful gases from the source, is beneficial to improving the operation efficiency, and can ensure the health and safety of life of workers.

The invention belongs to the technical field of tunnel engineering, and particularly relates to a tunnel blasting scheme design method and system based on a database technology. According to the scheme, a hybrid architecture historical blasting case database comprising structured data and spatial data is constructed, and a progressive retrieval engine and a scheme generation algorithm are combined; the innovation of tunnel blasting design from experience dependence to data driving is realized; according to the scheme, structural features such as blasting parameters and geologic features are deeply fused with spatial features, a proposed progressive retrieval engine is combined, the spatial query efficiency is effectively improved, meanwhile, the matching degree of a reference case and an actual scene is improved, and meanwhile, the matching efficiency of the reference case and the actual scene is improved. According to the scheme, a tunnel blasting scheme generation normal form integrating benchmark maintenance, parameter optimization and expert verification is provided, so that the accuracy of the generation scheme is guaranteed, and meanwhile, the generation scheme can better adapt to an actual scene.

The utility model relates to operation equipment technical field especially, it is tunnel blasthole operation equipment with multi -way stuffing function. It mainly aims at the traditional tunnel blasthole stuffing adopts the pipeline perpendicular to tunnel wall, because the quantity of tunnel blasthole is many, the position is complex, leads to this mode to be difficult to flexibly aim at the blasthole of non - perpendicular or tricky position, there is the problem that the operation is complicated, the efficiency is low, and the following technical scheme is proposed, including the fixed pipe of setting in blasthole one side, the fixed pipe is away from blasthole one end and is provided with the guide pipe, the steering assembly is connected in the fixed pipe with the guide pipe between, the steering assembly is used for adjusting the orientation of guide pipe, the medicine pushing mechanism is installed in the fixed pipe side, the medicine pushing mechanism is used for pushing the medicine bag and inserts it into the blasthole, the let - go component is arranged on the medicine pushing mechanism, and the let - go component is used for letting - go. The utility model has improved the convenience and quality of stuffing operation, and has enhanced the blasting effect and construction safety.

This invention discloses an intelligent projection positioning and drilling accuracy control system for blast holes at tunnel faces, belonging to the field of tunnel drilling and blasting construction technology. It aims to solve the technical problems of inaccurate blast hole positioning and large drilling direction deviations in existing tunnel face systems, leading to low construction efficiency. The key technical points are: the control system includes a structured light projector mounted on a tunnel drilling and blasting trolley, at least two industrial cameras, a fiber optic shape demodulation module, and a controller. A fiber optic shape sensing unit is installed inside the drill rod at the end of the drill arm of the drilling and blasting trolley; the structured light projector projects structured light, the industrial cameras acquire binocular images, the fiber optic shape demodulation module calculates the curvature and torsion angle sequence of the sensing unit, and the controller controls the drill arm drive mechanism to correct the drill bit position and direction through 3D reconstruction, coordinate comparison, and real-time deviation adjustment. This invention achieves intelligent positioning and drilling accuracy control of blast holes at tunnel faces, improving the accuracy and efficiency of tunnel drilling and blasting construction.

The invention relates to the technical field of formation of an open-pit-to-underground mine first mining covering layer, in particular to a slotting blasting method for the position close to a slope covering layer. According to the groove broaching blasting method based on the combination of the vertical medium-length hole and the fan-shaped medium-length hole, the influence effect of ground stress on rock breaking and throwing is fully considered when the cutting blasting meshes are arranged, the medium-length hole cutting blasting effect is improved, and the purpose of forming a fan-shaped cutting groove at a time is achieved; and on the premise that the groove broaching blasting effect and the groove broaching quality are guaranteed, the tunneling process amount of roadway cutting and the corresponding safety risk are greatly reduced, so that follow-up stoping blasting operation can be promoted to be normally carried out, and the construction safety coefficient and the working efficiency are improved.

The utility model relates to the technical field of mine blasting, and discloses a smooth blasting explosive fixing device in mine mining, which comprises a fixing cylinder body, a top cover device is clamped at the upper end of the fixing cylinder body, a base device is clamped at the lower end of the fixing cylinder body, a guide ring is fixedly connected on the inner wall of the fixing cylinder body, and the guide ring is fixedly connected on the inner wall of the fixing cylinder body. Clamping rods are annularly and fixedly connected to the upper end face of the fixed barrel and the upper end face of the base equipment at equal intervals, after energy-gathered explosives are installed in the fixed barrel, the energy-gathered explosives are located in the middle through a guide ring, after the blasting direction is adjusted, the energy-gathered explosives are pressed, the energy-gathered explosives extrude a second extrusion plate, and then the energy-gathered explosives are driven to rotate; the second extrusion plate drives the fixing rod to move outwards, the fixing rod is inserted into the inner wall of the explosive hole, meanwhile, the telescopic spring is extruded, and when the energy-gathered explosive is pressed to the bottom, the telescopic spring extrudes the second extrusion plate so that the second extrusion plate can clamp and fix the energy-gathered explosive, explosive position deviation is avoided, and therefore the blasting effect is improved.

The present application relates to a kind of precision matching tunneling blast hole variable density charge design method, comprising the following steps: face three-dimensional scanning and preliminary blasting design, drilling construction and lithology parameter acquisition, charge density calculation parameter determination, charge segmentation and linear density calculation, variable density charge and initiation;Compared to the variable density charge technology in the prior art lacks the fine density matching of blast hole, leading to the demand mismatching of explosive energy release and rock breaking, exacerbating the vicious cycle of overbreak and underbreak, and the problem of poor blasting effect, the charge density calculation of the present application integrates overbreak and underbreak distribution data, blast hole type, rock firmness coefficient, blast hole geometric parameter, realizes the double density matching of hole difference + intra-hole segmentation, ensures that explosive energy release and rock breaking demand accurately match, significantly reduces the overbreak and underbreak incidence, and the blasting effect is better.

The utility model discloses a blasting energy gathering device which comprises a main body assembly, and the main body assembly comprises an energy gathering seat, two limiting grooves, a V-shaped groove, two side plates, a connecting sleeve, a threaded hole, a limiting hole, a threaded groove and a threaded connector. And the V-shaped groove is formed in the upper surface of the energy gathering seat. According to the utility model, the threaded connector is matched with the threaded hole, so that the connection of the connecting sleeve and the energy-gathering seat is completed, then the explosive charge is adhered in the V-shaped groove, the energy-gathering seat is inversely buckled on ore at the blocking point of the ore drawing funnel, the explosive in the V-shaped groove is detonated, the distribution and the direction of blasting stress can be changed through the V-shaped groove, stress concentration is formed at the V-shaped groove, and the blasting effect is improved. Therefore, the purpose of shaped charge blasting can be achieved, shaped charge blasting of blocking points of the ore drawing funnel is achieved by guiding the direction of explosive energy, the blasting effect is improved under the condition that the using amount of explosives is reduced, the dredging efficiency of the ore drawing funnel is improved, and the safety during operation is improved.

The invention relates to a uniform-scattering pressure-maintaining uniform-cracking composite roof blasting structure and blasting method, and belongs to the technical field of mining. The uniform-scattering pressure-maintaining uniform-cracking composite roof blasting structure comprises a plurality of groups of rock stratums, joint cutting holes and energy gathering pipe fittings which are hierarchically distributed from inside to outside; the plurality of groups of joint cutting holes are distributed at intervals and penetrate into a rock stratum, and each joint cutting hole comprises a pre-blasting area and a non-blasting area; the multiple sets of energy gathering pipe fittings are arranged in the pre-blasting area at intervals in the length direction of the energy gathering pipe fittings, and stemming is placed between every two adjacent sets of energy gathering pipe fittings. According to the method, the sensitivity difference of different lithology to the blasting effect is fully utilized, the joint cutting hole explosive loading amount is designed for all rock stratums, the energy absorption effect of soft rock stratification to explosive shock waves is weakened, the phenomenon that blasting gas of hard rock stratification escapes to the soft rock stratification is reduced, all pre-blasting areas have the independent post-blasting pressure maintaining process, and the blasting effect of the pre-blasting areas is improved. And the blasting effect is optimized.

The invention discloses a blast hole detection device based on sonar laser ranging and a use method of the blast hole detection device, and relates to the field of blast hole detection. The fixing device comprises a support, a hollow connecting column, a fixing hole, a bolt, a nut and a small measuring tape. The inner wall of the hollow connecting column is provided with a thread connected with the measuring device, and the outer wall is provided with a fixing hole for fixing the bracket through a bolt and a nut; the small measuring tape is arranged on the outer wall of the hollow connecting column; the measuring device comprises a laser range finder, a sonar emitter, a sonar receiver, a control panel, a control button, scale marks and a horizontal bubble bead; the outer wall of the sonar receiver is provided with threads which are connected with the hollow connecting column. And the scale marks are arranged beside the horizontal bubble beads. The water layer distribution condition in the water-containing blast hole is detected through the sonar measurement principle and the laser ranging principle, convenience and rapidness are achieved, accurate data support is provided for blasting design, and the blasting effect of bench blasting of the strip mine is improved.

The utility model provides a surface mine water-containing blast hole mixed emulsion explosive loading device which comprises a frame body, a roller and a limiting rod, the roller and the limiting rod are arranged on the frame body, the roller and the limiting rod are arranged in parallel, and the limiting rod is connected with the frame body in a sliding mode. When the device is used during operation, the explosive conveying pipe of the mixed loading explosive truck can be effectively prevented from being in contact with a blast hole opening (wall), the phenomenon that dross and gravels slide down to the bottom of the blast hole to block the hole is avoided, and the explosive conveying pipe of the mixed loading explosive truck does not need to reach the bottom of the blast hole during blasting operation; the loading efficiency of the mixed loading emulsion explosive truck is improved, the labor intensity of blasting workers is reduced, and the blast hole bottom loading quality is improved.