摘要:
A charge for cutting a casing (10) comprising a plurality of propellant sections (20) arranged in a stack and interspaced with a flame retardant material (38). A modifying agent is provided with the propellant. An ignition mechanism (58) causes the propellant to deflagrate rather than explode, producing a high pressure stream of combustion products.
摘要:
A three dimensional multi-phase tunneling method and equipments thereof, make it possible that a drilling and blasting process can be carried out simultaneously during excavating a pilot tunnel by means of tunnel boring machine (TBM), thereby is capable of reducing the period and the cost of excavation. The three dimensional multi-phase tunneling method includes the steps of drilling an oblique charge hole on an upper half section in a pilot tunnel being excavated by a tunnel boring machine (TBM) and drilling an outermost charge hole to a predetermined length in a tunneling direction (longitudinal direction) at an outermost tunneling section during excavating the pilot tunnel, and charging and blasting the upper half section, wherein the oblique charge hole is turned at a predetermined angle from a transverse direction to a longitudinal direction, and charging and blasting the lower half section except the central portion apart by a predetermined distance from the tunnel face after drilling a longitudinal hole.
摘要:
A nonelectric blasting system, method and device for use in establishing a time sequential firing of blasting elements, the device comprised of an elongated tube (500) which contains a low velocity deflagration mixture adhered to the inner walls of said tube. The device, by itself, controls a desired initiation pattern of a plurality of blasting elements by transmitting an initiation signal at a much reduced velocity than conventional shock tube or explosive cord by use of preselected material mixtures.
摘要:
An explosive device (EBC1) receives signals specifying a unique communications address for use in a blasting circuit and a required blasting delay. The device (EBC1) has an electric igniter (128), but no independent power source which might cause accidental detonation. In an address and delay setting mode, when the device (EBC1) is being handled by a blaster, a unipolar signal is transmitted to the device (EBC1) to charge only a control power supply (C1, Q1, R1, Z4) for general communications. In a blasting mode, a bipolar signal is transmitted to charge both the control power supply (C1, Q1, R1, Z1) and an igniter power supply (C2). A security code must, however, be transmitted to enable charging of the igniter power supply (C2). Prior to detonation, each explosive device (EBC1-EBC3) in a blasting circuit responds to a calibration signal by generating a timing circuit test count. A blasting machine 20 processes nominal delays and test counts, and transmits adjusted delays to synchronize operation. A firing signal is recognized only if it contains a predetermined number of coded components thereby providing immunity to electromagnetic noise. The device (EBC1) is safely removed from a blasting circuit by transmitting a disarming signal which causes its igniter power supply (C2) to be discharged.
摘要:
An apparatus for electrically blasting a number of electric detonators arranged at a plurality of working faces, including a single controller having a power source unit for supplying a D.C. voltage and a plurality of ignition control units for selectively applying the D.C. voltage; a plurality of oscillators each arranged near respective working faces, the number of the oscillators corresponding to that of the ignition control units, each oscillators being energized with the D.C. voltage to generate a high frequency current and being connected to respective ignition control units via an electric wire bundle; and a plurality of lead wires each connected to outputs of respective oscillators. Loop-like leg wires of electric detonators are elctromagnetically coupled with the lead wires with the aid of transformer magnetic cores.
摘要:
In dem Gasgenerator (1) sind zum Erzeugen eines Gasdruckes in einer Expansionskammer (2), um Ausstoßmunition aus einem Trägerbehälter auszustossen, an sich bekannte mit Umhüllung versehene und gegen äussere Einflüsse gesicherte Sprengschläuche (3) und mittels Verbin-_ dungsstücken (5) damit verbundene Zündschläuche (4) abwechselnd in gleichen oder in unterschiedlichen Längen (L, bis L 8 ) hintereinander angeordnet und voneinander gegen Druckeinwirkung abgeschirmt.
摘要:
In the perforation of the wall (26) of a well, a number of perforating guns (15 to 16) are joined in series by a primer cord and then fired in sequence. A time delay unit is included in the cord immediately before the last gun (16), and the vibratory energy from the firing of the guns is detected (20, 24) and recorded (22), the presence of an appropriate delay before the final gun fire indicating that all guns have been duly detonated.