RELIABILITY ANALYSIS ON PILLAR STRUCTURE USING A NEW MONTE-CARLO FINITE ELEMENT METHOD
用改进的有限元Monte-Carlo法分析金属矿山点柱的可靠性

Non-pillar continuous mining(NPCM) is briefly introduced in an underground metal mine as an example of a new continuous mining method. The pillar of excavation room plays a critical role in the stability status of NPCM. Therefore,probabilistic method (reliability analysis method) is adopted to deal with the uncertainties in rock mass and ore body. By calculating the strength analytically and stress numerically of the pillar,the implicit limit state equation is established,which is different from general limit state equation. To carry out the reliability analysis of pillar,a new Monte-Carlo finite element method based on neural network is needed and presented. Reliability index is obtained to evaluate the pillars performance. The results are proved to be correct by the mining engineers,and the new method is of good application effect and prospect.