The basic principles to determine the chimney height of a power plant are meeting the demand of atmospheric diffusion and saving investment,ensuring the maximum ground concentration lower than the controlling goal of the enviromnent.

By research for rational technique on the height of electricity factory chimney,the article pointed out the main effect factor of contamination falling thickness,and tested the rationality of different chimney height from weather and air influence aspect.

Has summarized a set of plan of chimney height rational proof,through rearching national standard,stipulation and method of rational-ity of the chimney height and analysing major effect factor of influencing the density pollutant falled to the ground and combinimg some examples of the chimney height rationality design.

This essay discusses the necessity,urgency,and feasibility of introducing super-high chimney to the plain area of Beijing based on the pollution status of near-ground atmosphere in that area as well as the regular pattern of the formulation and disappearance of near-ground inversion and the situation of smoke diffusion.

The 100-metre high chimney is successfully demolished in the complex circumstances, which does not bring about any damage to the buildings around.

The 100?meter?high chimney is successfully demolished in the complex circumstance,which does not bring about any damage to the buildings around.

The paper introduces the tall and big chimney s blasting and dismantling engineering, approaches the basic theory of blasting and the functional mechanism of toppling process and collapsing vibration after firing, and so on.

This paper summarizedthe current situations of theories and practices of blasting demolition chimneys, pointed outfour main factors which effect the safety of blasting demolition tall chimneys: the veracityof falling direction, fling, recoil, break.