46 results about "Explosives engineering" patented technology

The invention relates to a heavy ammonium nitrate-fuel oil explosive with detonator sensitivity produced by using chemical sensitization and a preparation method thereof. The heavy ammonium nitrate-fuel oil explosive comprises the following components in percentage by mass: 5-55 percent of emulsion explosive and 45-95 percent of porous granular ammonium nitrate-fuel oil explosive. The preparation method comprises the following steps of: preparing the porous granular ammonium nitrate-fuel oil explosive; preparing a latex matrix; sensitizing the latex matrix; and mixing the emulsion explosive with the porous granular ammonium nitrate-fuel oil explosive. The heavy ammonium nitrate-fuel oil explosive with detonator sensitivity has small critical diameter, favorable detonator sensitivity and large capacity power without igniting an igniting primer, and can be used for various blasting engineering, such as medium-small blast hole, big hole diameter and upward fan-shaped medium-length hole, and the like. In the invention, the chemical sensitization is carried out by utilizing a brand new and quick chemical foaming agent at the same time. The novel quick chemical foaming agent has the characteristics of high foaming speed, thoroughly eliminated after-effect and fine and stable bubbles, and is a novel safe and effective chemical sensitization technique.

The invention discloses a long charging bag. A zipper or a hook-and-loop fastener belt is installed on the bag body in the length direction. A plurality of hollow cylindrical partitions with one ends opened are arranged in the bag body. Each cylindrical partition is stitched through more than half of a circle of yarn thread or bonded or welded in the bag body. The long charging bag is used for charging the deep blast holes so that an explosive package can be prevented from being broken and deformed, accurate spaced charging and uncoupled charging can be achieved for downward blast holes or horizontal or slowly-inclined blast holes with two opened ends. The long charging bag can also be used for accurate charging of bent blast holes. The long charging bag is simple in structure, wide in usable material and capable of being easily used for large-batch industrial production and use. A construction method is wide in application range and capable of being widely used in engineering of demolition blasting, presplitting blasting, smooth blasting and underwater blasting, and the purpose of accurate charging of deep holes in the engineering is achieved.

The invention discloses an umbrella-shaped detent hanger. An umbrella framework structure is used for reference, elastic rope yarns or springs are mounted to make surface frames have the unfolding trend, and a hanging fixed pulley is further arranged at the lower end of the structure. When the umbrella-shaped detent hanger is matched with a charging long bag for charging an upward or horizontal or downward gently inclined deep blind hole with the enlarged hole bottom, the umbrella-shaped detent hanger is clamped at the hole bottom, the charging long bag is dragged into the blast hole through a rope winds around the fixed pulley, breakage and deformation of a blasting charge can be avoided, accurate spacing charging and non-coupling charging are achieved, and the problems of charging and blockage of upward or horizontal or downward gently inclined deep blind holes are solved. The umbrella-shaped detent hanger is simple in structure and wide in available material source, and mass industrial production and usage are easy. The construction method provided by the invention is wide in application range and can be widely used for projects of demolition blasting, soil and rock blasting, controlled blasting and mine blasting, and the technical scheme with the high cost performance is provided for deep hole charging.

The embodiment of the invention discloses a method for quickly determining a faulted detonator, and relates to the technical field of blasting engineering. The method for quickly determining the faulted detonator comprises the steps that electronic detonators installed in blast holes are scanned and registered in a blasting initiator, and registering serial numbers corresponding to the electronicdetonators are obtained and stored; the electronic detonators are delayed according to an established blasting scheme, and position serial number labels of the blast holes are identified according tothe registering serial numbers of the electronic detonators in the blasting initiator; the position serial number labels and the registering serial numbers are same and are both continuously numberedaccording to the Sichuan page sequence; networking detection is conducted on the networked electronic detonators, and the networking faulted electronic detonator is detected out; and the faulted detonator is determined according to the identified continuous blast hole position serial number labels same as the detonator registering serial numbers, the characteristics among rows, the characteristicsamong columns and registered detonator walling paths. The method for quickly determining the faulted detonator is suitable for blasting engineering operation adopting the electronic detonators, and the faulted detonator and the position where the faulted detonator is located can be quickly and accurately determined.

The invention provides a method and device for improving the blasting propagation reliability of a plastic film-packaged emulsified explosive. The method is characterized by comprising the steps that when blasting charging is conducted on site, the plastic film-packaged emulsified explosive is taken out first, one end of a plastic film-packaged emulsified explosive cartridge is inserted into the device, the explosive cartridge is rotated a round when the explosive cartridge is inserted into the portion, where a blade is arranged, of the bottom of the device, an explosive cartridge buckle and plastic film remnants are cut off and fall from a hole formed in the bottom, operation in the above steps is conducted on the other end of the explosive cartridge, blast hole charging is conducted on the explosive cartridge of which the two-end remnants are cut off, and then the charging continuity is guaranteed. The device is portable, simple and convenient to carry and can be used on a blasting construction site. The blade is arranged, and therefore the buckles and the plastic film remnants on the two end faces of the plastic film-packaged emulsified explosive can be cut off through the blade. According to the device, the buckles can be efficiently and quickly cut off, the on-site charging efficiency is improved, the blasting propagation reliability is improved, blasting sympathetic detonation incompletion is avoided, and the safety in blasting engineering is improved.

The invention belongs to the field of blasting engineering, and mainly relates to a water hole charging device and a charging method thereof. The device consists of two light, thin and brittle plasticcylinders with different radiuses and the same heights: a first cylinder is embedded in a second cylinder, and the bottoms are connected; a strip opening is vertically formed in the closed side surface of the top of the first cylinder for charging; and a nylon rope is fixed around the top end, communicating with the atmosphere, of the second cylinder. The charging process is as follows: the charging is performed in the first cylinder according to the designed quantity and the calculated filling density; a cavity between the two cylinders is fully filled with fine rock chips; and the rock chips are fed to the bottom of a blasthole through the smooth nylon rope. Through the cartridge bag density increasing method, the condition of difficult sinking of general water hole charging cartridge bags is overcome, the cartridge bags can reach the bottom of the blasthole more quickly and accurately, the construction efficiency is greatly improved, and the device is suitable for deeper water holes.

The invention relates to a tunnel blasting construction blast hole blocking device, and belongs to the technical field of blasting engineering auxiliary devices. The tunnel blasting construction blasthole blocking device comprises a filling structural part and movable rods, wherein the movable rods are disposed at intervals along the circumferential direction of the filling structural part, eachmovable rod is hinged to the same end of the filing structural part through a pivot shaft, and a torsion spring sleeves each pivot shaft; when the torsion springs are in the natural state, the included angle formed by the axis of the movable rods and the axis of the filling structural part is less than 90 degrees; when the included angle formed by the axis of the movable rods and the axis of the filling structural part is equal to 90 degrees, the return spring force of the torsion springs points to the other end of the filling structural part; and the filling structural part is provided with apassage for allowing a detonating fuse to pass through. The tunnel blasting construction blast hole blocking device is convenient to operate and high in filling quality assurance.

The invention provides a method for determining an axial decoupling coefficient of a charge structure of a cavity in the bottom of a hole. The method is applied to the technical field of blasting engineering, and is designed comprehensively based on various factors such as failure characteristics of rock, the relation between initial tensile stress of rock of a hole wall and tensile strength of the rock and action time of quasi-static pressure of exploding gas in a blast hole. The method is used in the field of engineering blasting to overcome bottom resistance, eliminate a tight bottom and improve the circumstance that a method of ultra-deep reinforced charge at the bottom of the hole or adopting high explosive at the bottom when a blasting effect is achieved; and the method is used for digging protection layers of permanent buildings and structures.

The invention provides a treatment method of emulsified waste medicine. The method comprises the steps that porous granular ammonium nitrate, diesel oil and emulsified waste medicine are mixed according to the mass ratio of (60-72):(3-5):(25-35). The emulsified waste explosive can be recycled through simple mixing at normal temperature, the obtained industrial explosive has certain free-running property and certain cohesiveness, and the obtained product has the advantages of the low cost, the good performance and the good safety, and can meet the requirements of open-air rock blasting engineering for explosion performance. Compared with an existing treatment method of emulsified waste medicine, the emulsified waste medicine can be well recycled, the treatment process is safe, simple and environmentally friendly, and obvious economic benefits and social benefits are achieved.

The invention provides a blasting operation site management method, belongs to the technical field of civil blasting, and solves the problems that only execution management can be realized on a blasting operation site, the execution safety and normalization of the blasting site are not supervised, and data acquisition, tracing and statistical analysis are lacked. The method comprises the steps of online blasting engineering approval, online blasting batch approval, blasting field process supervision, blasting operator qualification supervision, remote supervision and information tracing. According to the method, electronization and informatization of blasting operation site supervision are realized, pictures of blasting site operation personnel are automatically compared with personnel information recorded in blasting engineering information, the blasting site construction process is standardized, the safety and normalization of site construction are guaranteed, comprehensive information acquisition and real-time monitoring are realized, and each implementation link has traceability; and the method can help enterprises to carry out engineering operation frequency statistics, initiating explosive device usage statistics, personnel operation condition statistics and analysis of problems encountered in blasting engineering.

A blasthole plugging device belongs to the field of blasting engineering and comprises a covering part, an adjusting part and a supporting part, the covering part covers a blasthole, the adjusting part is mounted on the covering part, and the supporting part is mounted at the front end of the adjusting part. The covering part comprises a cover plate, a cylinder body, lugs, shaft pins, bosses, grooves and lower convex teeth, the rear end of the cover plate extends to the cylinder body, the three lugs are evenly distributed at the rear end of the cylinder body in a circumferential array mode, each lug is provided with one shaft pin, the bosses are arranged on the cover plate towards the interior of the cylinder body, the grooves are formed in the front end face of the cover plate, and a circle of lower convex teeth are arranged in an inner cavity of each groove. The adjusting part comprises a round cover, upper protruding teeth, an extension rod, a through hole, a pin, a spring and a driving wheel, the rear end face of the round rod is provided with the upper protruding teeth, the extension rod is arranged in the middle of the rear end of the round rod, the through hole is formed in the rear portion of the extension rod, the pin is installed in the through hole, the spring is installed between the pin and the boss and sleeved on the extension rod, and the driving wheel is fixedly installed at the tail end of the extension rod. The three supporting parts are hinged to the shaft pins respectively, and each supporting part is of a cam structure.

The invention relates to a blast hole blocking device for blasting construction and a blast hole blocking method, and belongs to the technical field of blasting engineering. The device is provided with a channel allowing a detonating cord to penetrate through, and meanwhile the device further comprises an end plate, a shaft rod, connecting rods, a support, elastic stress rods, supporting rods and the like. In the implementation process, the overall specification of the device is matched with the diameter of a blast hole, and the device is integrally placed at a blast hole blocking position. During blasting, blasting impact waves act on the end plate, the shaft rod moves outwards through the instantly-generated blasting impact force, connecting ends of the connecting rods and connecting ends of the elastic stress rods form the expansion effect through hinge structures of the connecting rods, and therefore the elastic stress rods are tightly attached to the wall of the blast hole, and the better blast hole blocking effect is achieved. The device can be applied to horizontal blast holes and can also be applied to various blast holes such as vertical blast holes and inclined blast holes. The device is convenient to operate and high in packing quality assurance.

The invention provides a safe and efficient mining method for a segmented medium-length hole stope. The method comprises the steps that an ore body to be mined is divided into segmented stopes and mined step by step, when a hanging roof occurs in the mining process, medium-length hole blast holes are constructed in rock drilling roadways of the left and right adjacent stopes to the hanging roof area for millisecond blasting treatment, continuous deterioration of the normal row face blasting hanging roof condition is avoided, and smooth proceeding of medium-length hole stope mining operation is guaranteed. The medium-length hole blast hole charging part is the range with the hanging roof in the medium-length hole stope in one step, the charging method can achieve efficient and accurate blasting of the hanging roof, waste of explosives cannot be caused, and the stability of the ore body and surrounding rock mass in the adjacent stopes is not affected. According to the method, timely treatment can be carried out when the hanging roof occurs in the segmented medium-length hole stope, the method has the advantages of being accurate in blasting, high in construction efficiency and low in cost, the ore loss rate can be effectively reduced, the ore crushing quality can be improved, and a guarantee is provided for efficient and safe operation of subsequent normal row face blasting engineering of the stope.

The invention discloses a blasting expanding element special for underground blasting engineering, and belongs to the field of blasting instruments and the blasting engineering. The blasting expandingelement comprises a fixing block. The fixing block comprises a sub-fin section and a barrel section. The fixing block is provided with a fixing block center hole, the fixing block center hole penetrates through the sub-fin section and the barrel section, the end, away from the barrel section, of the sub-fin section is closed, and 3-6 fin blocks are arranged on the portion, on the periphery of thefixing block center hole, of the sub-fin section. The blasting expanding element further comprises a blasting expanding powder column pipe shell, a blasting expanding powder column is pressed in theblasting expanding powder column pipe shell, and the blasting expanding powder column pipe shell is located at the position, at the bottom of the sub-fin section, of the center hole. The blasting expanding element further comprises a sealing plug, a sealing plug center hole is formed in the center of the sealing plug, and the sealing plug is arranged in the fixing block center hole and makes contact with the end face of the blasting expanding powder column. Automatic assembly can be achieved, the production efficiency is high, the cost is low, and meanwhile the problems that in the undergroundblasting engineering, as detonation waves compress adjacent detonators, blasting failure or a groove effect is caused, and explosive is under blasting failure are solved.

The invention relates to a blast hole blocking device for tunnel blasting and belongs to the technical field of blasting engineering auxiliary devices. The blast hole blocking device comprises a packing structural component, wherein the packing structural component comprises a baffle plate and a connecting rod; one end of the connecting rod is perpendicularly and fixedly connected into the middleof the baffle plate; an operating end is arranged at the other end of the connecting rod; a plurality of parallel stressed rods are arranged on the periphery of the connecting rod; the axis of each ofthe stressed rods is parallel with that of the connecting rod; each of the stressed rods is connected with the connecting rod through at least two springs; an electromagnet is arranged on the connecting rod; the electromagnet, a wire, a switch and a power supply are cooperated to form an operating circuit; the switch is arranged at the operating end of the connecting rod; the stressed rods are made of magnetic attraction material; and the packing structural component is provided with a passage allowing a detonating cord to penetrate through. The blast hole blocking device is convenient to operate and is high in packing quality guarantee.

The invention provides a cofferdam blasting demolition method based on combination of variable linear density charging and digital electronic detonators. According to the cofferdam blasting demolition method based on the combination of the variable linear density charging and the digital electronic detonators, blasting demolition is successfully carried out on the cofferdam by researching the surrounding environment of a blasting area and a blasting scheme and adopting a digital electronic detonator detonating network and variable linear density charging method, the expected effect can be achieved through the method, safety of permanent buildings is guaranteed, and reference significance is achieved for similar blasting engineering.

The invention discloses an intelligent detonating device which comprises a detonating unit. The detonating unit sequentially comprises a chip module, a base body connecting wire, a base body, exploding foil, a flying piece and an accelerating ring. The base body connecting wire penetrates the base body to be connected with the chip module and the exploding foil, and an accelerating area is arranged in the detonating unit and close to the exploding foil. The accelerating ring is arranged on the side wall of the accelerating area in a surrounding manner. The chip module comprises a power supplycapacitor, a chip and a high-voltage pulse energy storage capacitor, and the flying piece is arranged between the exploding foil and the accelerating area. According to the intelligent detonating device, the defect that in the prior art, detonators need to be used for a detonating device for detonating can be overcome, a detonating bomb can be detonated without detonators, and therefore the purpose of improving blasting engineering safety operation is achieved.