摘要
矿井通风难易程度的科学评价是准确调整和优化矿井通风系统的重要依据,至今仍未形成公认的评价指标与方法.本文深入分析了现有矿井通风难易程度评价方法失效的本质原因,从影响矿井通风难易程度的根本因素出发,提出了适用于矿井通风难易程度的评价指标——矿井通风阻力,系统论述了采用矿井通风阻力作为评价矿井通风难易程度基准指标的科学性和可行性.同时,针对采用矿井通风阻力评价通风难易程度分级界限变化的问题,首次提出了和矿井通风阻力相当、衡量矿井通风难易程度的普适性指标"风压难度系数"及分级方法,对141个高阻力煤矿进行分析.研究结果表明:通风困难矿井评价准确率为88.65%,而等积孔法和线性风导法的准确率分别为18.44%,56.03%,相比而言,在通风困难评价准确率方面分别提高70.21%,32.62%.风压难度系数及分级方法不受矿井规模、风井数量的限制,能有效评价矿井通风难易程度,为矿井通风系统设计、优化与改造提供可靠指导,适用于矿井、集团公司、国家之间矿井通风难易程度的横向对比分析.
Scientific evaluation of the difficulty of mine ventilation is an important basis for the accurate adjustment and optimization of mine ventilation system,but there is still no recognized evaluation index and method.This study deeply analyzed the existing evaluation methods to mine ventilation fundamental reason for the failure,from the fundamental factors influencing degree of mine ventilation,was put forward for ease of evaluation indexes of mine ventilation,mine ventilation system were discussed using mine ventilation resistance as evaluation of mine ventilation ease the scientificity and the rationality.At the same time,aiming at the problem of using mine ventilation resistance to evaluate the grading limit change of ventilation difficulty degree,the universal index"wind pressure difficulty coefficient"and grading method,which was equivalent to mine ventilation resistance,were proposed for the first time to measure the difficulty degree of mine ventilation.Analyzing 141 high-resistance coal mines,the results showed that:the evaluation accuracy rate of mine with ventilation difficulty is 88.65%,while the accuracy rate of equivalent orifice method and linear air conduction method are 18.44%and 56.03%respectively.In comparison,the evaluation accuracy rate of ventilation difficulty is increased by 70.21%and 32.62%respectively.The"wind pressure difficulty coefficient"and the classification method are not limited by the mine size and the number of air shafts,which can effectively evaluate the difficulty of mine ventilation and provide reliable guidance for the design,optimization and transformation of mine ventilation system.It can be applied to the horizontal comparison analysis of mine ventilation difficulty between the mine,the group company or countries.
作者
魏连江
康家康
宋小林
周福宝
陈开岩
WEI Lianjiang;KANG Jiakang;SONG Xiaolin;ZHOU Fubao;CHEN Kaiyan(School of Safety Engineering,China University of Mining and Technology,Xuzhou,Jiangsu 221116,China)
出处
《中国矿业大学学报》
CSCD
北大核心
2021年第4期649-657,共9页
Journal of China University of Mining & Technology
基金
国家重点研发计划项目(2018YFC0808100)
国家自然科学基金面上项目(52074282)。
关键词
矿井通风
难易程度
评价指标
风压难度系数
分级方法
mine ventilation
degree of difficulty
evaluation index
wind pressure difficulty coefficient
stage division
