5results about How to "Reduce blasting vibration" patented technology

The application discloses a CO2 blasting intelligent control system and method based on digital twinning and edge computing, which deeply integrates wireless ad hoc network, radio frequency energy activation, edge computing collaborative decision and digital twinning modeling, realizes technical leap from preset triggering to intelligent closed loop, generates personalized parameters based on digital twinning model, combines edge computing real-time sensing and collaborative decision, reduces blasting vibration, improves ore crushing uniformity, reduces secondary crushing energy consumption, and improves blasting accuracy; radio frequency energy activation and electronic safety lock mechanism are adopted to realize zero live standby before detonation, eliminate early explosion risk caused by stray current and misoperation; the operator can complete all operations in a safe area one kilometer away, which essentially improves safety; through the wireless ad hoc network, the disconnection failure of wired connection is eliminated, intelligent collaborative detonation reduces the large block rate, the feedback optimization mechanism continuously reduces the unit consumption of explosives, and the comprehensive cost is reduced.

The present application relates to a reinforced concrete pillar and a method for blasting demolition of a structure, which forms a door hole by breaking a supporting cylinder wall of a high-rise structure, replaces the supporting system of the door hole with an axial pre-buried hole reinforced concrete pillar, and simultaneously charges and blasts in the pre-buried hole while drilling and charging in the remaining supporting cylinder wall, thereby achieving the blasting demolition of the high-rise structure. The present application can greatly improve the safety of blasting demolition, ensure the accuracy of directional collapse, greatly reduce the consumption of explosives and detonators, simplify the blasting network and charging operation, greatly reduce the blasting vibration and blasting dust, and achieve a more green blasting demolition. The present application is suitable for the blasting demolition of high-rise structures such as chimneys, water towers and silos made of bricks, concrete and reinforced concrete, and has a wide range of applications.

The present invention provides a controlled explosion dismantling charging structure and construction method for reinforced concrete secondary lining of a tunnel, characterized in that blasting sections are symmetrically arranged at the arch waist and side walls on both sides of the secondary lining, wherein 5 vertical sections are arranged at the arch waist, and the boreholes in each section are parallel and inclined upward; wherein 4 flat sections are arranged at the side walls, and the boreholes in each section are parallel and inclined toward the outside of the tunnel. A 3 cm thick concrete is left at the bottom of the borehole as a protective layer, and a discontinuous interval charging structure is used in the hole. The detonation sequence is to first detonate the arch waist blastholes on both sides, delay for half a second, and then detonate the side wall blastholes on both sides, and delay for 100ms for adjacent blastholes along the longitudinal direction of the tunnel. The principle is that the use of dense blastholes and interval charging structure can easily cause the concrete in the blasting area to fragment, and the concrete fragments are separated from the steel bars to form a weak area; the arch top secondary lining concrete in the non-explosion section overcomes the steel bar support force in the weak area of ​​the arch waist and falls, and drives the arch wall in the non-explosion section to deflect around the weak area of ​​the side wall until the second lining concrete falls to the ground. This method is suitable for the removal of reinforced concrete secondary lining of tunnels.

This application relates to the field of tunnel engineering blasting technology, and provides a shaped charge hydraulic smooth blasting device for ultra-large cross-section mountain tunnels. It includes reinforced explosive, a first shaped charge tube, a second shaped charge tube, a third shaped charge tube, half-rolls of explosive, an electronic detonator, a detonating cord, a water bag, and a sandbag. The first, second, and third shaped charge tubes are arranged coaxially in sequence, with half-rolls of explosive at both ends of each tube. The detonating cord connects the half-rolls of explosive at both ends of the shaped charge tube. The reinforced explosive is located at the end of the first shaped charge tube furthest from the second shaped charge tube, and the electronic detonator is located at the reinforced explosive. The water bag is located at the end of the third shaped charge tube furthest from the second shaped charge tube, and the sandbag is located close to the water bag. The sandbag is used to block the blast hole, and the lead wire of the electronic detonator passes through the blast hole. This application improves the blasting effect of shaped charge blasting.

This invention provides a vibration-controlled blasting process that reduces vibration and improves excavation efficiency through a nozzle device and dissimilar charging technology. It increases the free surface, reducing rock breaking resistance, thereby reducing blasting vibration and improving blasting efficiency. Employing a semi-open perforation device and dissimilar charging technology, it minimizes damage to the subsequent blasting strata during tunnel blasting and bench blasting, while also integrating with unexcavated blasting tubes. To achieve the goal of reducing blasting vibration and improving blasting efficiency, this invention uses a combination of pre-initiating blasting holes installed with low-explosive or high-detonation-index (1.4 seconds) charges integrated with a spring-loaded socket device, pre-initiating holes arranged in a row targeting thermally conductive fractures, and subsequent blasting holes with low detonation (index below 1.4) using low-explosive or high-explosive charges. The process involves subsequent blasting followed by final blasting, thus achieving post-initiation.