19 results about "Explosive blast" patented technology

The invention provides a high and cold area strip mine rock explosibility grading method, and relates to the technical field of mine rock explosibility grading. According to the method, field experiments, numerical simulation and an intelligent algorithm are combined, and the influence of climate and geological conditions of a high and cold area on rock mass explosibility is considered; the method comprises the following steps: establishing an explosibility index system comprising cold region climate and geological conditions, rock physical and mechanical properties, explosive blasting parameters and a blasting process, determining a fuzzy membership degree, a relative weight and a comprehensive weight of each evaluation index by using a fuzzy evaluation method and adopting a trapezoidal membership function, and proposing an explosibility grading method considering the cold region influence.

According to an embodiment, there is provided a signal dampening and blast mitigation device for mitigating a downed, weaponized drone or an IED, the device including: a hose assembly and a neutralizing body. According to an embodiment, the hose assembly is configured to connect to a water source and a first distal end of the neutralizing body, the neutralizing body includes a water bladder, and the hose assembly is configured to fill the water bladder in the neutralizing body. According to an embodiment, upon deployment, the signal dampening and blast mitigation device is configured to be placed over the downed weaponized drone or the TED, such that the filled water bladder and the neutralizing body are further configured to mitigate explosive blast and fragmentation and to block signal transmission from or received by the downed weaponized drone or the IED.

The present invention discloses a tunnel blasting simulation method and system for karst areas, which relates to the field of tunnel blasting simulation. The method comprises: establishing a three-dimensional geological model of the karst area, generating the initial geostress distribution law through numerical simulation; generating refined initial geostress field data; calculating the stress wave intensity and time series data generated by the explosion; obtaining stress wave propagation data; calculating the degree of surrounding rock damage and the initial position and direction of the crack; simulating the surrounding rock crack propagation process, and calculating the crack penetration probability and propagation speed near the cave in combination with cave characteristic parameters; analyzing the surrounding rock stability and damage evolution trend in the cave area; optimizing the explosive blast source term parameters and stress wave propagation boundary conditions, and generating tunnel blasting simulation results in the karst area. By accurately simulating the influence of caves on stress wave propagation, the present invention provides strong support for optimizing blasting plans and improving construction safety and efficiency, and has important guiding significance for tunnel engineering under complex geological conditions.

A downhole microseismic monitoring station arrangement method for determining a small-scale gauge function, steps include determining a small-scale range gauge function calculation model, arranging displacement type microseismic monitoring stations in the form of unequal intervals in the small-scale range downhole according to the determined calculation model, determining an initiation point of an explosive blast downhole, actively exciting vibration waveforms to trigger microseismic monitoring system and seismic monitoring system to record vibration wave signals, using the magnitude published by the seismic monitoring network and the maximum displacement recorded by the microseismic monitoring station to inversely calculate the gauge function corresponding to the microseismic monitoring station in the small-scale range, and fitting the gauge function and the numerical value of the distance between the initiation point and the microseismic monitoring station to obtain the gauge function calculation formula in the small-scale range. The present application can help to reduce the blind area of signal acquisition, so that the microseismic monitoring station can completely receive the mine earthquake signal in the small-scale monitoring area, thereby improving the accuracy and reliability of the magnitude calculation.

The invention discloses a coal mine roof pre-splitting device and a pre-splitting method. The coal mine roof pre-splitting device comprises a plurality of blasting pipes which are sequentially arranged in the extending direction of a blasting hole. The blasting pipe comprises an outer ring wall and an inner ring wall, an outer cavity is defined by the outer ring wall and the inner ring wall, an inner cavity used for containing explosives is defined by the inner ring wall, the outer cavity comprises an energy gathering cavity and a water cavity used for containing water, and the size of the energy gathering cavity in the circumferential direction of the blasting pipe is gradually increased outwards in the radial direction of the blasting pipe so that an energy gathering opening formed outwards in the radial direction of the blasting pipe can be formed. According to the coal mine roof presplitting device, kinetic energy and potential energy of explosives can be converted into kinetic energy and potential energy of water, the water is converted into high-pressure water jet after passing through the energy gathering cavity, the high-pressure water jet is jetted outwards along the energy gathering opening of the energy gathering cavity, the energy of the high-pressure water jet is concentrated, and the explosive blasting energy utilization rate is high; and a relatively large and tidy crack can be formed in a hard rock stratum of a coal mine roof, so that a relatively good pre-splitting effect is achieved.

The present application relates to the technical field of mine safety monitoring, and provides a multi-source carbon monoxide gas simulation and monitoring system for underground coal mines. In the system, the underground coal mine tunnel is simulated by a mine tunnel simulation unit, and the environmental control simulation unit delivers control gas into the shell structure of the mine tunnel simulation unit, so that the airflow in the shell structure of the mine tunnel simulation unit flows to the other end of the shell structure of the mine tunnel simulation unit; in the monitoring gas simulation unit, the coal spontaneous combustion simulation module is used to simulate the spontaneous combustion of coal in the coal mine, and the explosive blasting simulation module is used to simulate the explosion of explosives in the coal mine; the vehicle exhaust simulation module simulates the exhaust gas generated by mining vehicles during the underground coal mine. Furthermore, through the coordination of each unit, the complex environmental changes of the mine tunnel are simulated, and the comprehensive simulation of multiple carbon monoxide source working conditions is flexibly realized, thereby improving the detection and analysis capabilities of underground multi-source CO gas.

According to an embodiment, there is provided a signal dampening and blast mitigation device for mitigating a downed, weaponized drone or an IED, the device including: a hose assembly and a neutralizing body. According to an embodiment, the hose assembly is configured to connect to a water source and a first distal end of the neutralizing body, the neutralizing body includes a water bladder, and the hose assembly is configured to fill the water bladder in the neutralizing body. According to an embodiment, upon deployment, the signal dampening and blast mitigation device is configured to be placed over the downed weaponized drone or the TED, such that the filled water bladder and the neutralizing body are further configured to mitigate explosive blast and fragmentation and to block signal transmission from or received by the downed weaponized drone or the IED.

An assembly (7) for triggering an explosive in a hole (9) to produce an explosive blast in the hole includes (a) an explosion trigger (15, 19) for triggering the explosive in the hole, (b) a detonation unit body (21) that is configured to be located at or proximate an open end of the hole in an initial position of the assembly in the hole and (c) a trigger cord (31) that is connected to the detonation unit body and to the explosion trigger.

The application provides a high-cold-region open-pit mine rock blastability grading method, and relates to the technical field of rock blastability grading. The method combines field experiments, numerical simulation and intelligent algorithms, considers the influence of high-cold-region climate and geological conditions on rock mass blastability, establishes a blastability index system containing cold-region climate and geological conditions, rock mass physical and mechanical properties, explosive blasting parameters and blasting technology, uses a fuzzy evaluation method, adopts a trapezoidal membership function, determines the fuzzy membership degree, relative weight and comprehensive weight of each evaluation index, and proposes a blastability grading method considering the influence of cold regions.

According to an embodiment, there is provided a signal dampening and blast mitigation device for mitigating a downed, weaponized drone or an IED, the device including: a hose assembly and a neutralizing body. According to an embodiment, the hose assembly is configured to connect to a water source and a first distal end of the neutralizing body, the neutralizing body includes a water bladder, and the hose assembly is configured to fill the water bladder in the neutralizing body. According to an embodiment, upon deployment, the signal dampening and blast mitigation device is configured to be placed over the downed weaponized drone or the TED, such that the filled water bladder and the neutralizing body are further configured to mitigate explosive blast and fragmentation and to block signal transmission from or received by the downed weaponized drone or the IED.

The present application provides a kind of explosion shock wave and fragment injury system, comprising: system pipeline, connect each gas chamber;Air source device, including air compressor and high-pressure gas tank, air compressor and high-pressure gas tank are communicated by system pipeline;Firing device, can launch shock wave and several number of fragments;Protective device, for protection, test data and recovery projectile, protective device is connected with transmission device, can return part of shock wave received by protective device to firing device;And electrical control system, with air source device, firing device and protective device electric connection, for controlling the inflation of each gas space and the launch time and sequence of firing device.Can control shock wave and fragment to reach organism sequence and the number of fragment hitting organism, greatly improve the repeatability and precision of test, and make inflation valve open automatically after shock wave shooting, save shock wave gas chamber inflation time.

The invention discloses a gas expansion pipe for mining, which comprises a double-layer vacuum pipe body, an electronic controller with an FPGA (Field Programmable Gate Array) control chip, a nanocrystalline / graphene composite heat conduction rod, a CuO / Al / PTFE (Polytetrafluoroethylene) composite gas-making agent and a protection part with a conical injection cavity, the protection part with the conical injection cavity is arranged at one end of the double-layer vacuum pipe body, and the protection part with the conical injection cavity is arranged at the other end of the double-layer vacuum pipe body. A piezoelectric ceramic-phase change material-ultra-high molecular weight polyethylene composite protective layer is adopted for the protective part with the conical jet cavity, the protective part can bear 8MPa internal pressure impact, the permanent deformation is smaller than 0.5 mm, and an overpressure anti-explosion valve is arranged at the other end of the double-layer vacuum tube body. By means of electronic control, when micro-current passes through the high-heat-conduction rod, high temperature is generated, a gas making agent is rapidly expanded to generate high-pressure shock waves to rapidly release high-pressure gas, blasting objects or deposits are rapidly propelled outwards by geometric-level equivalent shock waves, the whole process from detonation to ending only needs 0.4 millisecond, and efficiency is high; and the defects of great destructiveness, high risk, ore body crushing and the like in the conventional explosive blasting mining and presplitting are overcome.

The utility model provides an explosive blasting shock-resistant protective device for non-metal mine exploitation, which relates to the technical field of blasting protective devices and comprises a base, a connecting column arranged at the top of the base, a protective plate hinged to the top of the connecting column, a hinge block arranged at the top of the base, and a chute arranged at the bottom of the protective plate. A hinge rod is connected to the middle of the sliding groove and connected with the hinge block, a buffer groove is formed in the top of the protection plate, a buffer assembly is connected to the middle of the buffer groove, and the buffer assembly is stressed to deflect and reset in the buffer groove. The problem that when a blasting protection device directly bears collision impact of broken stones, the broken stones continuously generate traces and damage to the protection device, and the service life of the protection device is shortened is solved. Through the buffer assembly arranged in the device, impact generated when broken stones are hit can be buffered through deformation deflection during impact, so that the protection effect of the protection plate can be better, and the service life of the protection plate is longer.

This invention provides a method and system for co-initiating carbon dioxide phase change fracturing and electronic detonators. The method includes: dividing the tunnel face into an explosive blasting zone and a carbon dioxide phase change fracturing zone based on the vertical centerline; drilling conventional blast holes in the explosive blasting zone and fracturing holes and fracturing guide holes in the carbon dioxide phase change fracturing zone; installing electronic detonators in the conventional blast holes and carbon dioxide phase change fracturing devices in the fracturing holes; connecting the electronic detonators in the explosive blasting zone and the excitation heads of the carbon dioxide phase change fracturing devices in the carbon dioxide phase change fracturing zone to an initiation controller via the same bus; detonating the electronic detonators through the initiation controller, sequentially detonating the slotted holes, auxiliary holes, bottom holes, and peripheral holes, and triggering the carbon dioxide phase change fracturing device after the vibration damping interval. This invention greatly improves fracturing efficiency and fracturing device recovery rate, keeping the maximum single vibration experienced by the existing tunnel at an extremely low level.

A method for actively measuring a gauge function in a small-scale range includes the following steps: determining a detonation point of an explosive blast within the small-scale range to be monitored, installing shock wave monitoring stations at different distances from the detonation point, and accurately recording the spatial distances between the detonation point and each monitoring station; actively exciting a vibration waveform through a blasting operation, and recording the shock wave signals received by each monitoring station; calculating the magnitude of the blasting event using a monitoring station with a larger epicenter distance, and inversely calculating the corresponding standard gauge function for the monitoring station in the small-scale range; and obtaining a calculation formula for the gauge function in the small-scale range through numerical fitting of the gauge function and the epicenter distance. The present invention significantly reduces the error in magnitude calculation in the small-scale range, improves the accuracy and reliability of the magnitude calculation results, meets the magnitude calculation requirements in a small-scale range with an epicenter distance of less than 5 km, and has high reliability and strong applicability.

This invention relates to the field of decorative stone mining technology, and more particularly to a high-efficiency, low-damage mining method for hard stone. The invention provides a high-efficiency, low-damage mining method for hard stone, comprising the following steps: dividing the hard stone mining area into zones and then drilling holes; sequentially applying microwave radiation excitation, high-pressure jet cutting, and carbon dioxide blasting to the hard rock mass in a predetermined fracturing direction. This mining method overcomes the problems of traditional rock explosive blasting, such as difficulty in controlling energy, high risk, large vibration effects, and significant damage to the internal structure of the stone, as well as the severe wear and low production efficiency of wire saws in hard stone mining, thus achieving high-efficiency, low-damage mining of hard stone.

The application discloses an explosion wave protection method for improving the wave-damping capacity of a distribution layer under water immersion and freezing conditions and belongs to the technical field of protection engineering. The method comprises the following steps: in the process of an existing explosion wave protection method based on a layered structure, hollow particle materials are partially or wholly replaced by traditional wave-damping materials; the water-tight brittle hollow particle materials have high durability, good water-tightness and static pressure bearing capacity, so that the distribution layer can keep better wave-damping capacity under the conditions of immersion and freezing; the effective porosity of the wave-damping material under adverse environments is improved, the wave impedance of the wave-damping layer is reduced, the proportion of reflected energy is improved when the explosion wave propagates from the bullet-proof layer to the wave-damping layer, the gas phase in the closed pores is released by the gradual crushing of the hollow particle materials under impact, the dynamic compressibility and plastic deformation limit of the distribution layer material are improved, and the shock wave amplitude reaching the target structure is reduced; and the serious problem that the wave-damping efficiency of the traditional wave-damping material is greatly reduced after being immersed or frozen by underground water is solved.

The invention relates to an explosive blasting detection device and method, and belongs to the technical field of blasting detection. The explosive blasting detection device comprises a detection barrel, an anti-explosion container, a driving mechanism, a rotating assembly, an impact mechanism and a monitoring unit; the anti-explosion container is rotationally arranged in the detection barrel; the driving mechanism is arranged on the detection barrel and is used for driving the anti-explosion container to rotate; the rotating assembly is rotationally arranged on the detection barrel and is connected with the output end of the driving mechanism; the plurality of impact mechanisms are arranged on the driving mechanism; and the monitoring unit is arranged on the detection barrel. Comprising a can body, a base arranged at the lower end of the can body, two cover plates rotationally arranged on the can body, and a mounting frame arranged on the can body. And the rotary supporting bearing is arranged on the barrel body and is connected with the anti-explosion barrel. According to the explosive impact device, explosives can be impacted from multiple angles, all the explosives can be uniformly impacted, and therefore it is guaranteed that the detection result is stable and reliable.