This paper introduces the ventilating system of Sitai Coalmine and the condition of the gas pouring-out, and through the formulation of coalmine's reversing scheme, constructs the reversing works, perfects the reversing system of the coalmine, and increases the anti-disaster ability of the coalmine.

Based on the analysis of the characteristics in the process risk management of projects,the author has focused on the Fuzzy-ETA(event tree analysis)-FTA(fault tree analysis) method applied in the process risk management of R&D projects.

With an underground emporium ventilation engineering in Zunyi old city, analyses the issues including applicable code, ventilation system setting, determination of smoke exhaust quantity and exhaust air rate, arrangement of smoke exhaust and exhaust air ducts, and automatic control system.

Identification of ship's oil spill risk degree of sea area by using B-P artificial network;

Differential corrosion is pronounced in the course of corro-sive void evolution in weathering process.

In the weathering process from weakly-weathered to strong-weathered,the microstructure of the granite changed from a cumulated microstructure to a staggered one,the coupling force of the grains became incompact,the micro-cracks increased,and the content of clay minerals added.