矿井防尘供水管网失效模糊故障树分析

矿井防尘供水管网作为井下主要防尘设施，其运行可靠性直接影响到除尘效果，分析了引起防尘管网失效的主要因素，建立了防尘管网失效故障树，定性分析该故障树得到了引起管网失效的31个最小割集，应用专家判断和模糊集理论相结合的方法，评估了故障树底事件发生概率的模糊性，并以防尘管网故障树系统中的“启动水锤”这一底事件为例，计算出其模糊失效率为0.001 2，比较各因素的失效率，得出导致管网失效的主要因素依次为第三方破坏、化学腐蚀、杂物堵塞和附属设备失效。

Fuzzy Fault Tree Analysis of Failure of Water Supply Network for Mine Dust-proofing

Mine dustproof water supply network is a main underground dustproof facility and its operational reliability directly influences the dusting result. The paper analyzes the main factors that can lead to the dustproof network failures and establishes the fault tree correspondingly. Through qualitative analyses, 31 minimal cut sets are obtained. Expert judgment method and fuzzy sets theory are used in combination to assess the fuzziness of base events of the fault tree. Taking as example a base event of “starting water hammer”, its fuzzy failure value rate is calculated to be 0.001 2. The failure rates of various factors are compared and it is found that the main factors leading to the network failures are in turn third-party interference, chemical erosion, impurities blockage and accessory equipment failure.