In order to study the vibration effect of explosion to the equipment in the confined space, blasting test has been made in the explode tower to measure vibration acceleration of the equipment. The date with the inputgauge is registered, transferred into the computer, and then analyzed to find out the distribute regulation of the vibrate acceleration under different mass of TNT. The date is analyzed with linear regression, and then a calculation method of the vibration acceleration in the confined space is summarized in this paper.

In order to define the plastic zone of metal plate under explosion load, based on expansion theory of detonation outcome and transmission analysis of stress wave between interfaces, combined with property of metal plate, a formula of plastic zone is deduced about metal plate under contact explosion of charge with a given form. An explosion test is implemented to determine the plastic zone of plate. Comparison between the experimental value and calculation value indicates a good agreement.

In this paper, because of the notable function of the porous structure attenuating shockwaves, large numbers of tests about the machine of wooden lattice have been finished, which were conditioned the same porosity and the different diameters of the pores, and the results have been compared and analyzed at the same time. The results indicate that the little wooden lattice machine with dense pores have more excellent effects.

Based on the analysis of detonation wave in Nonel tube, some key parameters, such as detonation velocity, length of reaction zone, were simplified and calculated under various loading conditions. Calculation results were also analyzed and compared with tests. This research shows that the experiential equation with 50 percent energy loss can give a good and handy prediction for detonation velocity in a certain loading range from 12mg/m to 18mg/m. Numerical calculation is feasible for Nonel tube design, as the application deserves to be well broadened.

In this paper, the blasting program, detail design and practical effectiveness of controlled demolition blasting several kinds of different structure reinforced concrete foundations are introduced. The conclusions of design essentials and problems which should be mentioned in this kind of controlled demolition blasting are drawn.

In comparison to powder line used in highdepth penetration perforation charge, a little attention was addressed to powder line used in the big-hole penetration perforation charge for its difficulties of designing and testing. In this paper, major factors which affect performances of powder lines were systematically studied through the penetration test against concrete target, the testing results show: the performance of powder line is affected by its structure designing, composition, proper powder arrangement, and line’s forming technique; the performance of line could be optimized to meet the design demand by adjusting above major factors.

In order to study the relationship between standoff distance and the penetration depth, penetration process of the cylinder-cone shaped charge without shell is numerically simulated. The jet penetration to the 45^# steel target at different standoff is studied, compared with the experimental results. It is indicated that numerical simulation results agree with experimental results well. The ratio of effective standoff to charge diameter for the cylindercone shaped charge is about 1.4~1.8, while the maximum penetration depth is approximately 4.6 times of the charge diameter.

The effect of the different industry detonators, enlace intensity and detonate modes on detonating plastic nonel tube reliably by industrial detonator were studied in this paper. The results offer necessary reference value for the layingout of the plastic nonel tube.

By commentary on the technology structure of various emulsion machine used in China now, the main influencing factors of emulsifying effectiveness and safety are analyzed, the technical points of mechanical and safe design about the emulsion machine are put forward, and some corresponding results are given.

In this paper, the orthogonal experimental method is applied to optimize the formula of emulsion explosive. The experimental conditions are selected through the orthogonal, and the data is analyzed according to the orthogonal characteristics to find out the impact of various factors on the results through a representative small number of tests. And the primary and secondary impact factors are confirmed to obtain a better production conditions or combinations of the better parameters. Test results show that the factors impacting the strength of emulsion explosive are the ratio of raw materials, the type of emulsifier, and the way of sensitized. While the ratio of raw materials turns out to be a key factor to impact the strength of emulsion explosive, the type of emulsifier and the way of sensitized are the major factor and a secondary factor respectively.

The article proposed the tentative plan of the ammonium nitrate solution applies directly in expanded ammonium nitrate explosive production process, and the design was demonstrated in the ammonium nitrate solution transport systems, storage tanks technology and safety measures, and the automatic control process of using ammonium nitrate solution. Through practical use, it’s proved that the project can achieve the effect of energy saving, labor intensity reduced and production costs lowered, with high economic and social benefits.

Through research on the modified ANFO explosives it’s proved that there is great difference in the produced explosives by means of variant different technical formulas and production techniques (facilities), due to the loss of the function of single elementary sensitized component TNT. Among these formulas and production techniques an ideal formula and reasonable production technique (facilities) is optimized to produce superior modified ANFO explosives greatly improving the blasting effect.

In this paper, the combination experiments of two kinds of emulsifiers and the performance of the related explosives are studied, to solve the problem of insufficient quality and performance of emulsion explosive as the longstorage of the common single emulsifier caused. The use of compound emulsifiers greatly improves explosive performance, water resistance, storage period of the soproduced emulsion explosives.

The performance impact factors of formula and density of expanded ammonium nitrate explosive is studied in this paper, the vacuum, puffing agent, ammonium nitrate concentration, solution temperature, equipment, and other key factors affecting the density and particle size distribution of expanded ammonium nitrate are analyzed. Combined with the features of continuous process equipment, some measures for increasing bulk density of expanded ammonium nitrate explosive are suggested to achieve the goal of improving volume strength of explosives.

With ANSYS/LS-DYNA software, three kinds of damping ditch models with different location are established. The damping rule when damping ditches are located in different ways is analyzed in this paper. The results show that damping effect is better when damping ditch closes with protected object, vice versa.

Heat-resistant ability and burning stability at both high temperature and room temperature of NLG bridge-plug propellant were researched by DTA method, TGA method, closed-vessel experiments and bridge-plug equipment experiment. The results show that the heat-resistant temperature of NLG bridgeplug propellant is higher than 250℃. When burning at high temperature 120℃ and constant volume, the gasgenerating rate of the propellant charge is more than that at room temperature at the pressure of more than 28.0MPa, with stable burning. NLG bridgeplug propellant charge also can burn steadily in the bridge-plug equipment, with almost same pressure ascended curve and the average maximum pressure 2.5MPa more than that as that of room temperature.

The demolition process of a 16th floor building in Harbin was monitored, and vibration velocity and frequency of ground particles were obtained during the blasting and collapsing process. The analysis of test results showed that effects of blasting vibration in the city demolition blasting process are generally small, however, large collapse vibration due to the volume and big quality of high buildings have more influence on surrounding buildings. High blasting vibration frequency attenuates fast, while low collapse vibration frequency attenuates slowly and easily causes the surrounding buildings sympathetic vibration and damage effects, therefore effective damping and preventive measures must be taken.

In view of the status in quo that study on controlling of adverse effects of blasting is far from enough, some nonmetallic materials of representative were selected to design and to process, and a few principle tests on explosion resistance capacity of the materials have been done. Results show that ceramics is easy to bring fragment and the antiknock is poor; fiber is of great intension although it is light, and it is easy to process; CFRP can be able to bear high temperature quite well, and is effective on reducing the noise; Kevlar fiber cloth has a good performance on antiknock; rubber has some effect on antiknock, and once it is compounded with fiber, the performance will swell greatly.

Based on the classification, the preparation, the properties and the applications of the liquid explosive, the development and present situation of liquid explosive are discussed in detail. It is pointed out that the mixed liquid explosive are used widely in military and civilian areas, because of the widespread raw material sources, simply production, good performance and many other unique characteristics, and has been made quite great development. At the same time it is warned that the liquid explosive have become the main choice of the terrorists for blasting terrorism. The management of liquid explosive raw materials is proposed to strengthen.

The authors point out the problems of certain realities based on the fire protection system analysis of civil explosive market. They affirm that automatic water spray system without power is essential safety. This system can monitor the abnormal temperature or the fire danger,and then respond to extinguish the fire immediately and automatically.

In this paper，a 180msuperheight reinforced concrete chimney at complex circumstances is demolished by controlled blasting first in domestic , which means the chimney blasting in domestic go beyond to a new height. This paper may be helpful for blasting more and more high-rise buildings.

In this article Karl Fischer method is used to determine the water of expanded ammonium nitrate explosives. It solves the problem of toolong testing time as the method of distillation of WJ9026, and realizes the rapid online determination of water of expanded ammonium nitrate explosives. Compared with several methods to determine water in industrial explosives, Karl Fisher method is a kind of important method to determine the water of expanded ammonium nitrate explosives in the course of production. Karl Fisher method has the characteristics of short testing time, continuous tested, high accuracy, stability and reliability.

Two kinds of noise control equipments were designed and carried out to investigate the noise control impact of two different configurations. It is proved that the noise control impact of the closed noise control equipment is better than that of the open noise control equipment. Their average quanta of noise elimination were 22.6% and 17.9% respectively, and both the shaped charge jets penetrate through 40.0 mm thick 45^# steel isotropic target.

The application of anthracite in black powder is introduced. Studies have shown that anthracite can be used as a combustible agent component in existing process equipment under the same conditions for the pharmaceutical and manufacturing process. The application of anthracite can greatly stabilize the fuse burning speed. After 5 months storage the 40 mesh sieve black powder made by the use of 3%~5% of the anthracite, is used in the manufacture of the fuse. The burning speed decreases only 9 m/s, and much lower than the current fuse. The results of the temperature and humidity tests show that under the same conditions, the burning speed change is only half of the existing fuse.

Based on the production practice of Model II powdery emulsion explosive, comparative analysis on production technique, formula, performance and cost against Model I powdery emulsion explosive has been done. The Model II powdery emulsion explosive has better explosion performance, lower production cost, and improved intrinsic safety as shown.

The effect of emulsifier type, oil phase amount and sensitized material amount on the quality and stability of emulsion explosive is studied, and comprehensive analysis is also done with the production data. Approaches on resolving the performance and storage stability of emulsion explosives are proposed.

To solve the problems existing in the production of expanded ammonium nitrate explosive, a new countermeasure, reconstructing the technical equipments by using liquid mix-style productive technology, is discussed from the two aspects of scientific and feasibility. After reconstructing, both the explosion performance of expanded ammonium nitrate explosive and the safe technology of product line are improved.

Airconditioning cooling technology is introduced to accelerate cooling rate before charging in the physical sensitization process of emulsion explosive. Perlite cooling technology is put forward to settle the problem of disparate cooling rate and uneven temperature in the emulsion explosive cooling process. As shown by experiments, the Perlite is cooled down before sensitization, and uniformly dispersed in the matrix, which makes stable and uniform heat exchange to achieve the cooling purpose of rapid cooling emulsion explosive.

Based on the electrical measurement method the air shockwave parameters generated by explosives whose densities ranged from 1.0 g/cm³ to 1.5 g/cm³ were studied by experiments. The relationship curves and the regression coefficients between the parameters of the air shockwave and the charging densities are obtained based on the testing results. When compared with the empirical formulas calculations, the results show that the testing values of Δp_m、 t₊、 i₊ are consistent with the calculations when the charging density is 1.5g/cm³. Besides, the relationships between t_－、 t_r、 θ and the charging density are also gained, which will be the valuable reference for the further exploration of the characteristics of the shock waves.

 The relationship between microstructure and macroeffect of powdery industrial explosive is studied. Based on the study the comparison of performance and safety of two powdery explosives which have different microstructure has been done. The study is useful for the development of high quality powdery industrial explosive.

Based on the balancing mechanism of chemical reaction this article analyses several factors influencing the content of toxic gases after the explosion of industrial explosive and points out that the predominant impacts to the toxic gases is played by explosion temperature and pressure as well as water content of explosive. Focused on both the manufacturing process and testing process the article also brings forward the corresponding improved suggestion.

According to actual situation of the production process, some work for energy conservation and emission reduction is done in two projects, which are the revamp of the cooling system in emulsion explosive production line and the application of the liquid ammonium nitrate system in expanded ammonium nitrate explosive production line, achieving great performance as well.

The paper introduced the design, construction and protection technology for blasting network of (30+15) ton dock cofferdam under waterfilled condition. The characteristics of detonation network underwater were analyzed, and selection of priming material, soaking water pressure test and the security protection measures of blasting network in the project process were discussed mainly, with the expected results achieved.

The paper analyses the reasons and judgment of blasting vibration, shock wave in water, blasting swell, flying rock and blasting pollution in underwater blasting connecting with practical experience and relative theory. It also proposes corresponding safety control and protection measures according to its formation in order to decrease its danger to the minimum. This paper can be used as a reference to underwater blasting project.

The article introduces the NO.2 filling automatically production line of industry detonator designed by ourselves. The line is controlled by the computer and video monitoring with nobody operation in the main dangerous process besides filling with shell, inner capsule and gathering detonator. The line realizes the automatically adding without machinestop at the filling processes of high explosive and initiating explosive by patent technology, with single addition amount below 300g. The line also equips with the explosive altitude testing and wasteproduct picking machine, and installs the isolation equipment to control the amount and distance of mould on the belt preventing sympathetic detonation. The line can produce thousand industrial detonators every day with 10~12 workers.

By analyzing the influence factors about safety degree of flammable gas of permissible electric detonator in this paper, the critical calorific value and pressure in airroom of delay element were supposed, and also being verified. The structure and technology of permissible electric detonator in developed countries were discussed, and the technology method to insure the safety degree of flammable gas is presented.

Analysis and comparison is made about the impact of different pressure distance on its stability in this paper, by measuring the conductivity, NH4NO3 precipitation amount and solubility of emulsion matrix and emulsion explosive. Based on swelling interface theory, the relationship of the interfacial film and the stability is propounded, and the compressive strength of emulsion explosive before the sensitization is revealed to be superior to that of after sensitization. Studies in this paper will be very important for solving the problem of incomplete blasting or misfire when emulsion explosive used in millisecond delay blasting.

The effect of different expanded ANFO charge condition on detonation performance was studied by plate trace test. Results showed the critical diameter of expanded ANFO was between 12 to 15 mm; the dead-pressed density was between 1.25 to 1.40 g?cm^-3; and the content of water must be less than 2.0% for detonation. Its detonation performance increased along with the charge diameter augment, charge height enhancement, charge density increase, water content reduction and particles size decrease.

This paper analyzes the mixing methods of flamedepressant in the current domestic production of class two and three permissible emulsion explosive. Tests and application results propound that a complex of flamedepressant NaCl and KCl is added into oxidizer solution to produce the permissible emulsion explosive, with the optimum ratio NaCl 2.0%~3.0%, and KCl 2.0%~5.5%. The soproduced permissible explosive in this way has high safety, long storage period of product, simple processing and easy product quality control. The principle and technology of the permissible explosive are also introduced.

This paper introduces using VB programming language to realize the programmed calculation of multicomponent industrial explosive. By DAO (Data Access Object) accessing mdb database, and dynamic array storage calculated variables, the use of string functions and other methods, the explosion reaction equation and explosion parameters for a given formula can be automatically calculated, to obtain the best distribution ratio by extreme value theory.