2988results about "Blasting" patented technology

PCT No. PCT/JP96/01644 Sec. 371 Date Sep. 12, 1997 Sec. 102(e) Date Sep. 12, 1997 PCT Filed Jun. 14, 1996 PCT Pub. No. WO97/00144 PCT Pub. Date Jan. 3, 1997To provide a method for easily discriminating used and unused gas generators from among gas generators for air bags separated from used cars in a car scrapping process. A method for discriminating between used and unused gas generators according to the present invention is a method for discriminating used and unused gas generators from among gas generators for air bags separated from used cars in a car scrapping process, and this method comprises the steps of: a) crushing used cars mounted with gas generators each having on a surface thereof a material discoloring according to the surface temperatures in actuating the gas generator to separate the gas generators, and b) discriminating the gas generators in which surfaces are discolored and the gas generators in which surfaces are not discolored from among the separated gas generators.

A detonator assembly is provided for use in oilfield operations to detonate an explosive downhole including a capacitor discharge unit and initiator electrically connected together to form a single unit. It is emphasized that this abstract is provided to comply with the rules requiring an abstract, which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims.

A blasting system facilitates the actuation of a plurality of programmable detonators according to a desired blasting pattern, to cause the discharge of a plurality of associated charges, by downloading to the detonators blasting information that can be automatically determined by a portable handheld unit that incorporates a positional detecting device, such as a GPS device. The blasting information for any given detonator can be determined by the handheld unit as a function of the distance and the direction of the movement of the unit to the detonator, and/or by the actual GPS location while at the site of the detonator. This automatic determination of blasting information, and particularly the delay times, based on the movement of the unit to the detonator, eliminates error prone human calculations of the delay times needed for multiple detonators at a blasting site. This simplifies the operations and procedures needed for achieving a desired blasting pattern, without sacrificing safety or quality.

A net is made from an explosive resistant material such as KEVLAR and is thrown over an explosive-laden device such that the net helps contain the blast force of the explosive-laden device. The net also has a nozzle that is fluid connected to a fire suppressant agent as well as a high density foam, each of which are discharged through the nozzle once the net is thrown over the explosive-laden device, the fire suppressant agent and the high density foam each helping to minimize the blast force of the explosive-laden device. The net can be thrown manually or can be fired from a gun that uses either pneumatic force or a firing cartridge to propel the net at its target.

A shaped charge includes a charge case; a liner; an explosive retained between the charge case and the liner; and a primer core disposed in a hole in the charge case and in contact with the explosive, wherein at least one of the case, the liner, the primer core, and the explosive comprising a material soluble in a selected fluid. A perforation system includes a perforation gun, comprising a gun housing that includes a safety valve or a firing valve, wherein the safety valve or the firing valve comprises a material soluble in a selected fluid.

Methods, systems, and apparatus for generating energy from a process contained series of explosion cycles is provided. The Explo-Dynamics™ energy generating system includes several embodiments for stimulating the heat and pressure release episodes of the process configurations and translating the released forces into torque, thrust, motive force, and/or super-heat impulses. The methods and systems of the present invention include a comprehensive arrangement of process configurations and components as well as a means of operation.

An ordnance firing system is disclosed that includes a reusable electronics module and an ordnance module, each enclosed in a separate, sealed housing. The electronics module housing encloses firing electronics for electrically triggering initiation of a detonator in the ordnance module. The electronics module detachably connects to the ordnance modules via a connector which extends away from the electronics module housing. The housing of the ordnance module is constructed to be blast-resistant to prevent detonation of the detonator from rendering the electronics module inoperable.

An end plate for securing and orienting a charge tube within a downhole-perforating gun. The end plate includes apertures for receiving locating tabs on the end of the charge tube to ensure the end plate is affixed to the charge tube in a specific orientation. The end plate includes an alignment tab that mates with a corresponding alignment groove in the perforating gun barrel for ensuring insertion of the charge tube into the perforating gun barrel in correct orientation to ensure the perforating charges exit through pre-designed scallops in the perforating gun barrel. A series of apertures may be present within the end plate to allow usage with one of a variety of sizes of charge tube. The end plate may include manipulation spaces along the circumference of the end plate to allow the end plate to be properly positioned or retrieved. The end plate may include an attachment system for attachment of an initiating device.

According to an aspect a bulkhead assembly is provided having particular application with a downhole tool, in particular for oil well drilling applications. The bulkhead assembly includes a bulkhead body and an electrical contact component disposed within the bulkhead body, wherein at least a portion of the electrical contact component is configured to pivot about its own axis, without compromising its ability to provide a pressure and fluid barrier. In an embodiment, a ground apparatus is provided to provide an electrical connection for at least one ground wire. The ground apparatus may be positionable on the bulkhead body of the bulkhead assembly. In an aspect, a downhole tool including the bulkhead assembly and ground apparatus is also generally described.

A ballistic protection shelter includes a soft-walled shelter structure wherein soft wall and soft roof portions are supported on at least one rigid support member, and an internal shelter structure for disposition within the soft-walled shelter structure. The internal shelter structure includes at least rigid side wall panels connectable to each other to form an enclosure. The panels are of a ballistic protective material adapted to provide protection to shelter occupants against explosive detonations and shrapnel.

The invention relates to a hollow-hole rhombic parallel cut blasting damping method. Blasting tunneling is performed on the tunnel face of an underground tunnel. The construction method comprises using a down-the-hole drill to drill a hollow hole with the diameter of 90mm to 180mm at the position of the middle of the tunnel face of the tunnel; using a hammerdrill to drill a plurality of blast holes, enabling the blast holes to comprise cut holes, auxiliary holes, periphery holes and base plate holes which are expanded around the hollow hole; filling explosives and detonators, using stemming to seal the blast holes, adopting rock emulsion explosives, and using ordinary millisecond nonel detonators or high-precison millisecond nonel detonators; and detonating the explosives according to blast hole arranging orders and detonator delay time. The hollow-hole rhombic parallel cut blasting damping method has the advantages that when an urban subway underneath passes buildings at a close range in a granite stratum and old resident houses, the blast vibration speed can be effectively controlled, influences of blast vibration on the buildings and life of residents are reduced, and compared with a traditional wedge cut blasting scheme, the hollow-hole rhombic parallel cut blasting damping method enables the maximum blasting vibration speed to be reduced by 50%.

A wireless control system for ground-mobile robotic systems in which communication between the operator control unit and the unmanned ground vehicle is transmitted via a plurality of spectrally efficient simplex communication links.

A detonator system for borehole systems which include detonating cord exposed to borehole fluids, pressures and temperatures. A firing head has a sealed chamber for an electrically fired detonator and has a booster charge holder forming part of the seal. The chamber is sealed by a wire line firing sub and by the booster holder. The charge holder includes a bulkhead separating the detonator chamber from a booster charge chamber and providing part of the detonator chamber seal. The detonator explosive and the booster charge are positioned on opposite sides of the bulkhead so that upon detonation of the detonator, the bulkhead is ruptured and the explosion transfers to the booster charge and from it to the detonating cord. The firing head includes holes for attachment of borehole tools such as perforating guns or back off tools to be fired by the detonating cord.

Wireless detonator assemblies (51-59) in use, form a cross-communicating network of wireless “detonator assemblies, such that communication of each wireless detonator assembly (57-59) with an associated blasting machine (50) can occur either directly, or via relay of signals (61-69) between other wireless detonator assemblies (51-56) in the network. Wireless detonator assemblies (51-59) can disseminate information (such as status information, identity information, firing codes, delay times and environmental conditions) among all of the wireless detonator assemblies in the network, while compensating for signal transmission relay delays at nodes in the network, thereby enabling the wireless detonator assemblies to detonate the explosive charges in accordance with the delay times. Various wireless detonator assemblies and corresponding blasting apparatus are disclosed and claimed. Methods of blasting using the wireless detonator assemblies and blasting apparatus are also disclosed and claimed.

A shaped bridge slapper having a pair of spaced conductive lands on a substrate; a bridge member between the spaced conductive lands, the bridge member having a curved shape and a cavity herein, and a flyer layer extending over the bridge member.

Methods for evaluating drill pattern parameters such as burden, spacing, borehole diameter, etc., at a blast site are disclosed. One method involves accumulating the burden contributed by successive layers of rock and matching the accumulated rock burden to a target value for a borehole having a length related to the average height of the layers. Another method relates to varying drill pattern parameters and characteristics to match blast design constraints, including the substitution of one explosive material for another by the proper balance of materials and/or output energies to the associated rock burden. Analysis of deviations from target rock burdens and corrective measures are disclosed, as well as cost optimization methods. The various methods can be practiced using an appropriately programmed general purpose computer.

A box by pin perforating gun system using swaged down gun bodies, a removable cartridge to hold a detonator and switch, and an insulated charge holder as an electrical feed-through.

A method and apparatus for use in a wellbore includes running a tool string to an interval of the wellbore, and activating a first component in the tool string to create a transient underbalance pressure condition in the wellbore interval. Additionally, a second component in the tool string is activated to create a transient overbalance pressure condition in the wellbore interval, or vice versa.

The invention discloses a static blasting construction method for a high-ground-stress soft-rock highway tunnel. The method comprises the steps of establishing of a tunnel excavation mode: a three-step method is used for excavation when surrounding rock is at the V level, and an upper and down step method is used for excavation when the surrounding rock is at the IV and III levels; cut hole construction: a diamond cutting mode and a wedge cutting mode are used for cutting holes according to different levels of the surrounding rock; rock breaking through splitting of a hydraulic splitter to form an excavation free face: the hydraulic rock splitter is used for splitting rock along a cut hole after construction of the cut hole to form the excavation free face for the next step; construction of an auxiliary hole and periphery holes of an upper step; construction of an auxiliary hole and periphery holes of a lower (middle) step; static blasting and de-slagging and hole periphery trimming; and circulation operation. According to the static blasting construction method, the rock breaking capacity and the rock breaking efficiency are high, high adaptability is provided for different surrounding rock, the technology can be implemented easily, the construction is safe and reliable, and the method is particularly applicable to highway tunnels with special construction requirements.

A wellbore perforating system including a multi-component universal initiator. The universal initiator is a “plug and play” initiator able to accommodate a wide range of perforating gun system.

The invention disclosed is an apparatus for explosive blast suppression, and a method therefor, the apparatus comprising a hemispherical enclosure (10) defined by an upstanding wall, positioning means (42) associated with the enclosure, for positioning the explosive device substantially equidistant from any point on the wall, and in a preferred embodiment includes an integral floor (40) and a rounded lower wall, to provide a substantially even distribution of blast forces in all directions toward the wall. The enclosure is made of composite textile material, comprising one or several layers of a ballistic material (e.g. Dyneema Kevlar) sandwiched between inner and outer layers of a light-weight rip-stop nylon fabric material.

A system and method of detecting, locating, geolocating and providing diagnostics on electronic devices includes use of emission detection apparatus, information collected over a network and template containing emission signatures. Collected unintended emissions are compared to an emission signature in the template preferably constructed from the information collected on the network. Using the known location of the electronic device, the emissions measurement device is then used to detect and identify other devices in the vicinity of the electronic device that is connected to the network. The emission detection apparatus includes a high sensitivity receiver for receiving and analyzing electronic emissions. The network collection apparatus could be any software manifestation known in the art for collecting information about a device such as a cookie or online fingerprinting or a hardware based collection mechanism.

Embodiments of the present invention relate to systems, methods, and apparatus for reliably communicating a detonation signal and perforating oil and/or gas well casings. Particularly, at least one embodiment includes a pass-through bulkhead connection switch that can reliably withstand high operating temperatures and pressures. Such pass-through bulkhead connection switch can be used in perforating gun assemblies and can eliminate or reduce incidents of failed detonations.

The invention provides an electronic detonator initiation device, which comprises a control module, a man-machine interactive module, a power supply management module, a single modulation and transmission module, a signal demodulation and receiving module, a signal bus and a power supply, wherein the power supply management module can include an analog/digital converter, a digital/analog converter and a voltage conversion module; the signal modulation and transmission module can include a signal modulation module and a boost module; the signal demodulation and receiving module can include a signal sampling module and a signal conditioning circuit; and the man-machine interactive module can include a set and display device, and an authorization device, a locking device or an anti-misoperation switch. The invention also provides a main control process of the initiation device, and explains the flow processes of the communication voltage management process, the signal transmission process, the signal receiving process, the charging process and the initiation process in detail. According to the technical scheme, the initiation device matched with an electronic detonator can achieve the basic functions such as two-way communication with the electronic detonator and initiation of the electronic detonator.

The invention discloses a construction method in the railway field, in particular relates to a construction method of a large-span tunnel passing through a rapid transit railway with a shallow tunneling process. The construction method comprises the following construction steps of: 1, advance supporting and pre-reinforcing; 2, partial excavation and millisecond blasting; and 3, short-bench excavation support construction. In a construction process, grouting technologies such as curtain grouting, full-section grouting, radial grouting and the like are used for blocking an underground water seepage channel to control the loss of underground water; and in the construction process, an automatic high-precision monitoring method and a fixed target high-precision monitoring method are adopted for carrying out monitoring to ensure that the influence of tunnel passing-through construction on rapid transit railway tracks on the ground surface is immediately found. By using the construction method, the safety of the tracks can be ensured when a newly-built railway passes through ballastless tracks.

The invention relates to a vibration absorbing method for cut presplitting blasting, which comprises the steps that blasting tunneling is performed on a face of a subway tunnel; a gadder is used to drill blastholes including presplitting blastholes, cutholes, assistance holes, periphery holes and bottom plate holes; the presplitting blastholes are a group of transversely arranged blastholes that are located 500mm-600mm above the cutholes; the presplitting blastholes adopt mixed connected kerf cartridges for explosive loading; the cutholes, the assistance holes, the periphery holes and the bottom plate holes adopt common emulsion explosive loading, and adopt millisecond nonel detonators; and the presplitting blastholes, the cutholes, the assistance holes, the periphery holes and the bottom plate holes are initiated in sequence. The vibration absorbing method has the benefits that as a presplitting surface and a presplitting crushed zone are formed above the cutholes, the vibration is reduced and absorbed in transmission paths, the vibration velocity caused by the cut blasting is reduced obviously, and blasting vibration can be controlled effectively. Compared with the traditional smooth blasting, the maximum blasting vibration velocity can be reduced by 30%, and effects on protected heritages along a line are reduced.

The invention relates to a non-pillar deep-hole backing-type mining method. The method is suitable for that: the digging height is between 10 and 50 m; the length of a stope is between 40 and 80 m; the width of the stope is between 7 and 9 m; the dip angle of an ore body is between 68 and 90 degrees; the height of a bottom ore removal chamber is between 2.5 and 3.5 m; the height of an upper part rock drilling chamber is between 3.4 and 3.8 m; meanwhile, an explosive charge structure, an explosion initiating sequence, stope side lacing and top plate control are determined according to the conditions of the stope, and a remote-control scraper and a remote-control crushing trolley are jointly used to treat large ore materials for ore removal. The mining method has the advantages of small mining-cutting engineering quantity, simple mining-cutting process, high rock drilling efficiency, good blasting effect, safe and efficient ore removal process, can effectively improve the wide-spacing stoping safety for underground metal mines nationwide, can upgrade the mining technical level for the underground metal mines in China, can promote the development of nationwide underground metal mine mining technology, and can reduce the dilution rate and loss rate of nationwide underground metal mine spacing stoping stopes, so as to promote the maximal recycling of metal resources.

The invention relates to a digging method for preventing a strong or strong rock burst on an active face. The technical problem to be solved is to provide an active face strong or strong rock burst prevention digging method capable of effectively reducing the rock burst frequency on the active face and reducing the destructiveness of the rock burst. The method comprises the following specific steps: a, carrying out the shothole arrangement and charging design according to a conventional slotting proposal; b, drilling tunneling shotholes and stress-relief shotholes on the slotted active face; c, charging the tunneling shotholes in a convention mode, and charging the stress-relief shotholes in the 32 mm hole bottom within a deep buried range from 2 to 3m; d, detonating the stress-relief shotholes and the tunneling shotholes in turn; and e, tapping slag, and repeating the steps till the digging is completed. The method is mainly applied to deep buried hard rock tunnel projects for traffic, mining, water conservancy and hydraulic power, and the like.

The invention relates to a roof-cutting pressure relief method in hard-roof deep-hole pre-splitting blasting, belongs to the technical field of blasting pressure relief, relates to a method of controlling coal pillar stress concentration and intense gob-side entry strata behaviors caused by suspension of gob hard roofs in thick seams and super high seams, and solves such problems of coal pillar stress concentration and intense gob-side entry strata behaviors caused by suspension of gob hard roofs in thick seams and super high seams. The method is effective and widely applicable and includes the steps of firstly, reserving a roof-cutting roadway in coal pillars along a seam roof before working face extraction in case of the seam being the super high seam; if the seam is the thick seam, directly using a mining roadway as a roof-cutting roadway; secondly, if the seam is the super high seam, longitudinally reserving blast holes in the roof strata above the roof-cutting roadway; and thirdly, loading explosives, sealing the holes and allowing for roof-cutting blasting.

The present invention relates to a non-pillar sublevel caving method. The non-pillar sublevel caving method which loads and transports ores directly is characterized by comprising the steps as follows: two or more dipheads are tunneled downwards at the position of an orebody near a heading side along the orebody tendency and are used as main haulageways; segmented haulageways are tunneled from the dipheads to divide the orebody into segments; a stoping drift is tunneled from the segmented haulageways; the inner end of the stoping drift is tunneled a cutting roadway and a cutting winze; a vertical upward or oblique upward cutting slot medium and deep hole is drilled at the top plate of the cutting roadway, and the cutting slot is explored and formed on the cutting winze as a free surface; a mining medium and deep hole is drilled in the whole stoping drift, and the mining medium and deep hole of the stoping drift is explored on the cutting slot as the free surface to break ores; the ores are drawn under overlying rocks at the end of the stoping drift, and the ores are loaded on a tramcar directly to be transported out; when stoping, the processed of exploring the mining medium and deep hole, ore drawing and transporting out the ores are processed in the stoping drift, and the retreating mining is circulated until the stoping drift is mined completely. The non-pillar sublevel caving mehod has low cost, high ore recovery ratio, safe production and wide application range.