多因素作用下某矿巷道型采场CO浓度特性实验与通风优化

Experiment on CO concentration characteristics and ventilation optimization of roadway stope in a mine under the action of multiple factors

针对传统单因素作用下巷道型采场CO浓度特性实验考虑因素过少,分析较为片面的局限性,结合矿山现场,通过相似理论建立巷道型采场物理相似模型,并采用控制变量法进行多因素作用下巷道型采场CO浓度特性实验研究。研究结果表明,不同通风方式、不同风速和不同测点处的CO在采场内浓度特性规律为:采用长抽长压式通风,CO浓度越低;风速增大,CO浓度越低;与掌子面CO产生处的距离增大,CO浓度越低;现场实验和相似实验所得出的CO浓度变化趋势基本一致。采用长抽长压式通风,风速为0.75 m/s能有效降低巷道型采场内CO浓度,所得出的通风方案可为同等环境下巷道型采场现场CO通风防治提供参考。

In view of the limitations of the traditional single-factor experiment on CO concentration characteristics of roadway stope,the consideration factors are too few,and the analysis is one-sided.Combined with the mine site,the physical similarity model of roadway stope was established through similarity theory,and the control variable method was used to carry out the experimental study on CO concentration characteristics of roadway stope under the action of multiple factors.The results show that the characteristics of CO concentration in stope at different ventilation modes,different wind speeds and different measuring points are as follows:the more the ventilation with long suction and short pressure adopted,the lower the CO concentration.The higher the wind speed,the lower the CO concentration.The greater the distance from the CO production place on the palm,the lower the CO concentration.The variation trend of CO concentration obtained by field experiment and similar experiment is the same.It is considered that the use of long suction and short pressure ventilation with a wind speed of 0.75 m/s can effectively reduce the CO concentration in roadway stope,and the obtained ventilation scheme can provide a reference for the prevention and control of CO ventilation in roadway stope under the same environment.