Abstract: In order to establish the simulation model of vulnerable process of ecological environment in mining and evaluate ecological environment vulnerability dynamically, stochastic Petri-net (SPN) was adopted. The place set was divided into destruction state set, repair state set and virtual place set. Ways of representation and calculation method of these three types of places were given respectively. The state value of a place was to record actual change quantity of this place. The calculation of vulnerability was integrated into network system running naturally. Vulnerability algorithm based on SPN was given. In case study, a simplified SPN model was established. Its isomorphic Markov chain was drawn. We also calculated the average vulnerability using a large number of vulnerability-time sample data and steady state probability of each reachable marking. A further performance analysis then was conducted and so verified the effectiveness of the proposed method in this paper. The method can provide scientific reference for analysis of ecological environment vulnerability.

Key words: ecological environment, mining area, vulnerability evaluation, stochastic Petri-net