The conflicting problem of flash point and lower explosive limit as a criterion of hazard is studied in this paper.

Based on the principle of detonation and chemical thermodynamics, the lower explosive limits ( L EL ) of organic compounds were studied, and two methods were developed to predict the lower explosive limits of organic compounds by using the data of combustion heat or the composition of the compounds.

Study on the main characteristics of underground explosion seismic source function in granite;

Study on seismic coupling of underground explosion in rock;

Seismic source function for an underground explosion;

The explosiveness of four kinds of coal has been determined by testing two parameters,the lower explosion limit and the length of return fire.

The applicability of scaling laws to underwater explosion models tests;

Method research of charactering vitality of surface warship subjected to underwater explosion;

Numerical calculations!of the bubble pulsation forces of underwater explosions;

Calculation of the initial shock wave energy in underwater blasting;

The paper introduces briefly the attenuation rules of blasting vibration velocity and safety criterions, and analyzes the characteristics of blasting vibration frequency, then the underwater blasting tests using RDX are carried out on laboratory condition, with the intent of studying problems such as ground vibration caused by underwater blasting、 vibration frequency and so on.

In this paper,formulae of a industrial explosive in underwater blasting are given on the basis of TNT explosion shock wave parameters for explosion in water and principle of the energy similarty.