Research Of Choas Principal Model In Rock Blasting And Stress Attenuating Law Of Linear Charge Blasting

The paper analyzes the CHAOS characteristics of the rock stress ^ fragment dimension crashing process under the explosive blasting by the chaos theory for the first time, puts forward academic point of view that blasting system is a typical Chaos system, adding up to damage mechanics, reduces the connection between blasting fragment face and original damages of rock. Then, the concepts of blasting attracted face and the blasting attracted factor have been put forward. Linked the fractal theory, the fractal dimension connection of blasting attracted face and fragment dimension has been elicited. The research about the principle formula of rock under the explosive has been become the research of principle formula in crashing attracted face. The formula has been reduced between the original damages and the crashing attracted factor, rock stress, and then, the paper give the rock theoretical dynamic principle formula in rock cashing attracted face. It make the principle formula become simpler and more practical.By the attenuation regulation and distributing character of stress wave under the linear charge blasting, the paper bring forward the idea that the columniation stress wave can be regarded as cylinder stress wave, the end stress wave as spherical wave. The perfect stress attenuation formula in radical direction is established in complete elastic medium. On the foundation, the perfect stress attenuation formula in linear charge blasting has been reduced by the principle formula of blasting attracted face of the paper and the stress attenuation formula of spherical charge. After this, according to the difference between practice and perfect condition, the paper establish the stress attenuation formula on the radical direction under linear charge blasting. It also has been validated by the test result.On the basis of reduced stress attenuation formula, the paper elicit theoretical calculation expressions of jam lengths in hole blasting and space between charges in linear charge blasting. Linear charge blasting at the net of highway to Zhuhai aerodrome and the hole blasting at underground stope in Gaofen mining company have been design by the expressions. And then the paper validates the suitableness of the stress attenuation in the area of shock wave. Compared the research achievements with in-country and overseas, this paper bring forward some innovative result as follows:a). Brings forward the chaos theory into the research work of the principal equations. Analyzes the chaos mechanics characteristics in blasting. Puts forward academic point of view that blasting system is a typical Chaos system. Puts forward new concept of crash attracted face. It makes the research of rock principal equations change to the research of crash attracted face principal equations.b). Put forward suitable academic explanation for the direction of blasting process and false random of fragment distribution.c). On the basis of crash attracted face, analyzes the relationship between crash attracted face and damage, and then puts forward the crash attracted factor. According to phenomena method of continuum medium mechanics, puts the crash attracted face principal equation. Develops the blasting damage theoretical model and make it more perfectible.d). Puts forward stress wave research method when the linear charge blasting. It regarded column stress wave as cylinder stress wave, end stress wave as spherical wave. Acquires radial stress attenuating formula of the spherical charge and cylindrical charge in completely elastic medium and the radial and axis stress attenuating formula of linear charge in the rock.e). On the basis of validation of stress attenuating formula, the calculation formulas of hole jam length and space between chambers of linear room chamber have been achieved.