岩体可爆性未确知测度分级模型研究与应用

基于未确知测度计算理论和熵权方法,建立岩体可爆性未确知测度分级模型.首先选取岩石抗压强度、抗拉强度、粘聚力、弹性模量、岩石质量指标(RQD)作为岩体可爆性分级指标,构建合理的未确知测度函数,然后根据测度函数,采用信息熵理论计算各岩体可爆性分级指标的未确知测度,得到可爆性综合测度;最后采用置信度判别准则对可爆性综合测度进行识别评测,完成岩体可爆性未确知测度分级评测.将该模型应用于福建上杭紫金山金铜矿岩体可爆性的分析,从而选择合理的露天台阶深孔爆破炸药单耗,为低成本规模化开采矿石资源提供理论依据.研究表明:岩体可爆性未确知测度分级模型是一种科学合理的岩体可爆性分级方法,确保了评测对象信息的完整性和评测结果的客观性、准确性、可靠性,为工程爆破岩体可爆性分级提供了一种新思维,具有工程实践指导意义.

Unascertained measurement evaluation model for the blastability of rock masses

Based on the unascertained measurement algorithmic theory and entropy-weight method, an evaluation model for the blastability of rock masses was established. Firstly, compressive strength, tensile strength, cohesive strength, RQD were took into account as four indexes of rock masses blastability assessment, and unascertained measurement function was also constructed. Secondly, based on the unascertained measurement function, Entropy theory was introduced to obtain the comprehensive unascertained measurement matrix by calculating the index weight of blasting results influences respectively. Finally, the blastability evaluation result can be recognized from comprehensive unascertained measurement matrix with the confidence level criterion. We employ previously established model to evaluate the blastability of rock-mass in Zijin Shan Au-Cu deposit. The results show that unascertained measurement evaluation model is scientifically reasonable for the blastability of rock masses. More than ensuring the integrality of assessment object information, this model guarantee the accuracy, objectivity, reliability of evaluation results, and can be employed to the actual blasting engineering.