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    • 5. 发明公开
    • METHOD OF THE SHORTEST INTER-HOLE DELAY BLAST AND THE BLASTING AND DELAYING MEANS
    • EP3198218A4
    • 2018-05-16
    • EP15845338
    • 2015-02-09
    • RYU IN MU
    • RYU NAM SOK
    • F42D1/055C06C5/00F42B3/00F42D3/04F42D3/06
    • F42D3/04
    • A method of blasting the rock, wherein the blastholes along the rows are fired with the shortest inter-hole delay time ranging from 0.1 ms to 4.5ms in such a manner that a stressfield propagates within the stressfield pre-propagated from the preceding adjacent blasthole, thereby enhancing the fragmentation and preventing the explosive energy released to the venting of explosion gas, and the environmental impact caused by the production of excessive sound. The shortest inter-hole delay time is obtained by the length of the shock tube which is a requisite for transmitting the initiation signals to the blastholes and is used in the non-electric bidirectional firing systems such as PULKKOT system. The shock tube itself is the precise blasting and delaying mean which could provide the shortest delay time at a lowest production cost, prevent the enormous economic loss due to the use of the delay detonators with the inter-hole delays of 9ms, 17ms, 25ms and 42ms, and increase the effect of the explosive energy over 1.5 times. The shortest inter-hole delay time may also be provided by the control of the electronic initiation system, but in which case, the cost is more than 5 times expensive. The present invention is based on practical experiences of more than 50 years and has been utilized in the blasting practices for over 20 years.
    • 7. 发明公开
    • Mechanism for rapid de-coupling of load-bearing structures
    • 承重结构快速解耦的机制
    • EP2746717A3
    • 2017-05-31
    • EP13198560.8
    • 2013-12-19
    • Oakland University
    • Latcha, Michael ANassar, Sayed AUras, Mehmet H
    • F42B3/00F41H7/04
    • F16B19/00F41H7/042F41H7/046F42B3/006Y10T403/1633
    • A de-coupling mechanism (10, 84) includes a link (12, 86) slidably received in a link aperture (14) of a bracket member (16, 88). A pin (18, 90) is slidably received in a pin bore (20) of the link (12, 86) and a receiving bore (22) of the bracket (16, 88). A first block (26, 112) is connected to the bracket (16, 88) and includes an initiator receiving passage (28, 114) in communication with the pin bore (20). An initiator (34, 94) is positioned in the initiator receiving passage (28, 114) and retained against a connecting passage (32) edge and oppositely contacts an end face (35) of a cap (36, 36') connected to the first block (26, 112). A second block (42) connected to the bracket (16, 88) includes a longitudinal channel (44) having a channel diameter (B) larger than a pin diameter (A) so the pin (18, 90) is freely displaceable into the longitudinal channel (44). An end face (45) of a retaining cap (46) is connected to a second block end wall (47). The retaining cap (46) includes a stepped portion (48, 100) having a step diameter (C) smaller than the channel diameter (B) and the pin diameter (A).
    • 分离机构(10,84)包括可滑动地容纳在托架构件(16,88)的连杆孔(14)中的连杆(12,86)。 销(18,90)可滑动地容纳在连杆(12,86)的销孔(20)和支架(16,88)的接收孔(22)中。 第一块体(26,112)连接到托架(16,88)并且包括与销孔(20)连通的触发器接收通道(28,114)。 启动器(34,94)定位在启动器接收通道(28,114)中并且抵靠连接通道(32)边缘保持并且相对地接触连接到所述启动器(36,36')的帽(36,36')的端面(35) 第一块(26,112)。 连接到支架(16,88)的第二块(42)包括具有大于销直径(A)的通道直径(B)的纵向通道(44),因此销(18,90)可自由地移动到 纵向通道(44)。 保持帽(46)的端面(45)连接到第二块端壁(47)。 保持帽(46)包括具有比通道直径(B)和销直径(A)小的台阶直径(C)的台阶部分(48,100)。