掘进面风流监测及适应性智能调控系统研制

Development of airflow monitoring and adaptive intelligent control system for heading face

针对目前掘进面通风系统因无法对风流进行实时监测及适应性动态调控而造成的瓦斯与粉尘聚集严重等问题,研制出了风流监测及适应性智能调控原型系统来优化风流场分布。通过对掘进面风流监测及出风口风流适应性智能调控方法和系统实现的整体架构进行分析,基于流场相似与模化理论对掘进面进行了相似还原设计,确定了风速、瓦斯及粉尘隐患监测点位置,完成了基于ZigBee及GPRS技术的数据采集及传输架构,利用PLC控制技术实现了风流智能调控装置的动态调控,并研发了上位机系统。以柠条塔矿S1202掘进面为对象,对研制的风流监测及适应性智能调控原型系统进行了测试,结果表明:出风口距迎头5 m时,司机位置与回风侧行人呼吸带高度平均粉尘质量浓度分别降低了48.94%和34.36%,平均瓦斯体积分数降低了41.18%;出风口距迎头10 m时,司机位置与回风侧行人呼吸带高度平均粉尘质量浓度分别降低了38.04%和41.36%,平均瓦斯体积分数降低了43.02%,验证了风流适应性智能调控的可行性。

In view of the problem that the heading face ventilation system fails to perform real-time monitoring and dynamical adaptive regulation of airflow, leading to serious accumulation of gas and dust, we developed a prototype system of airflow monitoring and intelligent adaptive regulation. By analyzing the overall structure for methods and systems applied in airflow monitoring and intelligent adaptive regulation of airflow at the air outlet, the heading surface was similarly restored based on the similarity and modeling theory. Through numerical simulation and testing, we determined monitoring points where hidden dangers associated with wind velocity and gas and dust concentration exist and designed a real-time data collection and transmission architecture based on ZigBee and General Packet Radio Service(GPRS). Additionally, this study selected a Programmable Logic Controller(PLC) to realize dynamic regulation over the intelligent airflow control device. Moreover, we also proposed some functional modules for the host systems, such as a real-time monitoring module, an evaluation-based warning, an intelligent control module, and a 3D display and control module. In this way, we expect to fulfill dynamic monitoring of wind velocity and gas and dust concentration and realize intelligent adaptive regulation over the airflow. Taking the S1202 heading face of Ningtiaota Coal Mine as the object, we tested the effect of airflow adaptive control of the prototype system. The results show that when the air outlet is 5m away from the head-on, the average dust mass concentration at the driver location and the height of the pedestrian breathing zone on the return air side are reduced by 48.94% and 34.36%, respectively, and the average gas volume fraction is reduced by 41.18%;When the air outlet is 10m away from the head-on, the average dust mass concentration at the driver location and the height of the pedestrian breathing zone on the return air side are reduced by 38.04% and 41.36%, respectively, and the average gas volume fraction is reduced by 43.02%. The feasibility of adaptive intelligent regulation of airflow is verified.