1906 results about "Explosive Agents" patented technology

PCT No. PCT/GB96/02987 Sec. 371 Date Dec. 10, 1998 Sec. 102(e) Date Dec. 10, 1998 PCT Filed Dec. 4, 1996 PCT Pub. No. WO97/21067 PCT Pub. Date Jun. 12, 1997An electronic explosives initiating device which includes a firing element which has a designed no-fire voltage and an operating circuit which operates at any voltage in a range of voltages which straddles the designed no-fire voltage.

The invention relates to a manufacturing mode of environment-friendly and energy-saving M15_M85 methanol diesel oil. The methanol diesel oil is composed of diesel oil, methanol, and additives. The methanol diesel oil is prepared with operations under normal temperatures and normal pressures. The invention discloses a plurality of common additives used for preparing methanol diesel oil in modern times. If explosives and aviation fuels are appropriately utilized, methanol defalcated heat value can be well compensated. The theory is tentatively considered as a gaseous detonation theory. The additives can be selected from nitric acid esters, nitrates, nitro compounds, non-aromatic compounds, peroxides, and the like.

Provided are a method and a device for tunnel advance geology forecast with tunnel face blasting as a focus. The method comprises the steps of (1) drilling holes on two lateral walls at the inlet position in a tunnel; (2) filling a coupling agent into the drilled holes, and attaching weave detectors to the walls of the drilled holes; (3) winding a trigger circuit copper wire on cartridged explosive, and placing the cartridged explosive into a blasted hole of the tunnel face; (4), enabling two three-component weave detectors buried in a tunnel hole to receive reflective earthquake wave signals; (5) sending the signals to an amplifier after the signals are selected by a multi-way switch; (6) enabling the amplifier to amplify the signals and then transmit the signals to an analog/digital (A/D) converter through wireless transmission; (7) enabling a wireless communication module of a control chamber to receive a wireless signal and then transmit the wireless signal to a host, and recording the signal; and (8) achieving geology forecast through an processing program installed in the host. The device comprises signal acquisition, wireless communication and control and a data analyzing system. The method is simple, easy and low in cost, can be used for advance geology forecast of tunnels, holes and roadway underground spaces, and achieves automation and normalization of geology forecast.

The invention provides an axial embedded blast hole of a reinforced concrete beam and a blasting demolition method. The blast hole is formed in the mode that a pipe is embedded in the beam in the axial direction, continuous or discontinuous charging is adopted in the blast hole, a detonating fuse is arranged in the blast hole in an overall-length mode, a stirrup is cut off, and other technical means are taken. In this way, drilling operation is avoided, the number of blast holes and the number of detonators are reduced, consumption of explosive and the detonators is reduced, the smashing effect on reinforced concrete is improved, and the damage of explosion to the environment is reduced. The axial embedded blast hole of the reinforced concrete beam and the blasting demolition method can bring remarkable economic and social benefits.

A poured-type azido high-polymer bonded explosive and a preparation method of same. For solving a problem of low energy of an HTPB-based PBX explosive, an azido polyether energetic binder is added to a formula system of the PBX explosive, and by means of addition of an alkynol compound as a curing additive agent, a curing reaction time of the azido polyether binder system is greatly reduced. By means of addition of a high-energy-density main explosive and a metal fuel component, the obtained poured-type azido PBX explosive has high explosion heat and explosion volume, is higher than 1.80 g/cm<3> in density and is more than 1.60 TNT in power. Meanwhile, the poured-type azido PBX explosive has a low sensitivity level, is higher than 49 J in drop hammer impact energy I50 and is not more than 40% in friction sensitivity.

The invention discloses a high-pressure gas blasting-based coal seam roof advance presplitting method, which belongs to the technical field of mine safety. The method is performed according to the following steps: (1) forming a group of drilled holes in a coal seam roof every a certain distance on a conveying roadway and a track roadway of a working face, wherein each group of drilled holes is arranged in a fan shape and faces towards a goaf; (2) placing a gas detonation gun which is connected with a high-pressure gas compression system in the drilled hole and sealing the hole by using high-strength fast setting concrete or resin; (3) starting the high-pressure gas compression system and instantaneously releasing high-pressure gas in a high-pressure gas storage tank in the drilled hole through the gas detonation gun to blast so as to communicate the crack around the drilled holes with adjacent drilled holes; and (4) repeating the steps (2) and (3) on each group of drilled holes in sequence to finish advance presplitting of the coal seam roof. According to the method, the potential spark hazard of chemical explosive blasting is eliminated; and since the pressure of the high-pressure gas is controllable and impact blasting can be repeatedly performed on the rock body, the dynamic disturbance of a coal seam is small, the roof presplitting effect is good, and the method is environment-friendly, safe and reliable.

The invention relates to novel Methylobacterium species that are capable of degrading nitroaromatic and nitramine compounds. Compositions, kits and methods of using the Methylobacterium species for the degradation of nitroaromatic and nitramine pollutants are provided. More specifically, compositions and methods for the degradation or bioremediation of nitroaromatic and nitramine explosives and explosive residues are provided.

A propellant with high energy and low temperature sensitive coefficient of burning comprises 12-15% of an adhesive, 10-13% of a plasticizer, 15-18% of an oxidant, 38-50% of an energetic explosive, 10-18% of a metal fuel and 1.5-2.0% of a small group, wherein the adhesive is glycidyl azide polymer; the plasticizer is triethylene glycol dinitrate or 2,4-dinitro-2,4-diazaalkane; the oxidant is ammonium perchlorate; the energetic explosive is octogen; and the metal fuel is aluminum powder. The propellant has the characteristics of high energy (standard measured specific impulse is greater than 2450N.s/kg) and low temperature sensitive coefficient of burning (not greater than 0.15%K<-1>), and is suitable for tactical missile engines with far required range, strong penetration ability, high reliability and accurate guidance.

The invention discloses a temperature-resistance thermal insulation protecting bush which is used for charge blasting in a high-temperature blast hole and comprises a cylinder body with a cavity. The cylinder body is formed by stacking a fireproof layer, an insulation layer and a waterproof layer from exterior to interior in a composite mode, the cavity of the cylinder body is filled with a stick dynamite in a non-coupling mode, the gap between the inner wall of the cylinder and the stick dynamite is filled with high heat capacity liquid, the cylinder body is formed by stacking the fireproof layer, the insulation layer and the waterproof layer in the composite mode, each layer is made of heat insulation flame retardant materials, the heat conductivity coefficient is small, in the process that external heat energy is transmitted to the interior of the cylinder body, and the heat is gradually and greatly attenuated. Meanwhile, the high heat capacity liquid serving as energy consumed liquid is contained, the high specific heat capacity characteristics of the liquid are utilized for achieving energy conversion, a large amount of heat is absorbed, it is ensured that the temperature of the stick dynamite in the cylinder body is within the suitable range, under the heat insulation action of the cylinder and the heat absorption action of the high thermal capacity liquid, even though the temperature of the blast hole is high, blasting work can be safely performed, the bush is not limited by construction conditions, and operation is convenient and rapid.

The invention relates to a compound preparation method of an aluminum alloy and magnesium alloy laminated plate, which is characterized by comprising the following steps: (1) preparation of a base plate and a compound plate: leaving an interval of 20-100mm at the circumference of the compound plate based on the overall size of the compound plate, machining grooves of 1-5mm in the compound plate corresponding to the edge of the base plate based on the thickness of the compound plate, and carrying out smoothing and surface polishing and cleaning on the base plate and the compound plate, wherein the size of the compound plate is greater than that of the base plate, and the base plate and the compound plate are respectively aluminum alloy and magnesium alloy or magnesium alloy and aluminum alloy; (2) pre-heating treatment of the base plate and the compound plate: prior to explosion cladding, heating the base plate and the compound plate to 120-200 DEG C, and preserving the temperature; (3) foundation of explosion cladding: compacting with clay or fine sand, laying a fiber compound plate of 3-8mm on the surface to act as an explosion cladding base; and (4) preparation of explosives. Thus, the overall explosion cladding process is simple and easy to operate, and the metal of the compound plate can obliquely collide the metal of the base plate at a high speed under the explosive load effect of the explosives, thereby firmly connecting the metal of the compound plate with the metal of the base plate.

The invention belongs to the technical field of engineering blasting and particularly relates to a blasting demolition method for various cylindrical steel column structure components and buildings, wherein the cross sections of the cylindrical steel column structure components and buildings are shaped like Chinese character 'tian' or 'ri' or are of a square shape. The blasting demolition method is characterized by comprising the steps of (a) pouring concrete 2 in a columnar steel structure 1 to be blasted, (b) maintaining the concrete 2, (c) conducting oxyacetylene metal-cutting and drilling a blast hole 3 in the obverse side of the columnar steel structure 1, (d) precutting a seam 7 in the columnar steel structure 1, (e) determining blasting parameters, charging powder and connecting lines, (f) conducting protection and (g) conducting blasting. By means of effective implementation of the blasting demolition method for the cylindrical steel column structure buildings, the purpose of blasting demolition of the cylindrical steel column structure components or buildings through industrial explosive materials (emulsion explosives) can be achieved, and the blasting demolition method has the technical advantages of being safe, efficient and low in cost compared with a traditional manual demolition means.

The invention discloses a surface enhanced Raman scattering detection chip and a preparation method thereof. In-situ growth of nanometer flower-like ZnO on a silicon wafer is achieved by utilization of a hydrothermal method. A three-dimensional ZnO-Ag composite material is prepared by utilization of a physical non-solvent magnetron sputtering method. The composite material has high surface enhanced Raman effects. In addition, the composite material is modified with probes so as to construct a chip with the surface enhanced Raman effects. By modification with sulfydryl type probe molecules, explosive molecules with low original Raman activity can be captured on the chip. Through synergetic resonance, the probes and the composite material generate surface enhanced Raman signals, so that the sensitivity of the chip to the explosive molecules is better than that of a simple substrate not modified by probes. In addition, the chip shows good Raman effects for a plurality of explosives and has single high selectivity for the explosive TNT.

The invention relates to static sensitization equipment for packaging emulsion explosives. The static sensitization equipment comprises a static sensitizer (3), a colloid feeding hole (1) connected with the static sensitizer, a sensitizer feeding hole (2), an injection outer cavity (4), and a blocking chamber (6), wherein multiple rows of injection holes (5) are formed in the side wall; the sensitizer is mixed with an emulsion matrix, is ejected from the injection holes (5) under the action of the external pressure and is injected to the inner wall of the outer cavity (4), so that the emulsion matrix and the sensitizer form the first collision mixing; along with continuous entrance of the materials, repeated collision mixing is formed between the materials, the materials are pressed in the second-stage and third-stage sensitizers for repeating the collision mixing process, and finally, the emulsion matrix and the sensitizer are uniformly mixed. According to the equipment, the emulsion matrix and the sensitizer can be uniformly mixed under the condition that mechanical stirring is avoided, and a good sensitization effect can be achieved under the high/medium/low temperature conditions.

An elongate explosive charge element (25), said explosive charge element (25) including a flexible frangible cutting sheet (26) and an explosive agent (27) said charge element (25) adapted to the penetration of a barrier structure.

The invention discloses a method for determination of the polychlorotrifluoroethylene (PCTFE) content in a polymer-bonded explosive (PBX) by near infrared spectroscopy. The method includes the steps of: preparing and collecting 260 PBX samples, taking 180 samples of them as a calibration set for establishing a calibration model, taking the remaining 80 samples as a validation set for model validation, and acquiring the near infrared spectrum data of all the samples; using a standard method to determine the PCTFE content in the samples; subjecting the spectrum data of the validation set samples in the wave bands of 6102.0cm<-1>-5697.0cm<-1> and 4680.2cm<-1>-4242.9cm<-1> to a first order derivative treatment, correlating the treated spectrum data with the PCTFE content by a partial least squares method, and establishing the calibration model by cross validation; employing the calibration model to predetermine the PCTFE content of the validation set samples, and selecting an optimal model according to a minimum root mean squared error of prediction (RMSEP) of the validation set; and acquiring the near infrared spectrum data of the samples to be determined, and making use of the optimal model to obtain the PCTFE content directly. Being suitable for determination of the PCTFE content in a PBX explosive, the method has the characteristics of convenient operation, and rapid and accurate analysis.

The invention relates to an explosive detonation property testing system under a pulse high voltage and a tested explosive loading part. The microseond-stage pulse high voltage of the required pulse width is generated by a capacitive energy storage and charging unit and a pulse width control unit, and applied to the tested explosive loading part; then, a tested explosive is ignited by an ignition and explosion propagation unit in time sequence; and finally the high voltage resistance, the time sequence ignition stability, the detonation output property and the like of the tested explosive are measured by utilizing a detonating velocity and detonation voltage testing unit and a high voltage resistant testing unit under the microseond-stage pulse high voltage condition of the required pulse width. The explosive detonation property testing system and the tested explosive loading part are applicable to the explosive detonation property testing under the pulse high voltage, and have the characteristics of low cost, simple structure, adjustable pulse width and the like.

The invention relates to bispyrazolyl energetic compounds and a preparation method thereof, and belongs to the technical field of energetic materials. The synthesis method of the compounds comprises the following steps: 1, reacting 3,4,5-trinitropyrazole with 4-chloropyrazole to obtain a compound (2), nitrating the compound (2) to obtain a compound (3), aminating to obtain a compound (4), and acidifying and aminating to obtain a neutral maternal (5) and a compound (7) respectively; 2, oxidizing the neutral maternal to obtain a compound (6); 4, mixing the neutral maternal (5) with Ba(OH)2.8H2O, reacting the obtained mixture with sulfate of a corresponding cation, filtering, and evaporating the obtained filtrate to remove a solvent in order to obtain target products (8-12); and 4, directly reacting the neutral maternal (5) with the corresponding cation, and evaporating the obtained material to remove a solvent in order to obtain target products (13-16). The referred fourteen energetic compounds have the characteristics of good thermal stability, high density, low impact sensitivity, and excellent calculated detonation performance, and are potential insensitive high explosives.