摘要
回采工作面采空区的低氧现象严重影响矿井的安全生产,尤其在气温和气压变化剧烈时更为显著。现有的煤矿监测系统多局限于单一参数监测,没有单独针对低氧现象的监测系统,用于全面预测低氧气体的异常涌出。以上榆泉煤矿10号煤层为例,通过采空区低氧气体涌出是发生低氧现象的直接原因,分析了影响低氧气体涌出的因素。研究发现,在采空区无明显漏风的情况下,工作面气压波动是造成采空区低氧气体涌出的直接原因。同时,工作面与地面直接连通,地面大气参数变化直接影响了工作面气压。通过统计分析,总结了地面气温、气压波动与采空区“呼吸”效应的规律性。研究发现,采空区在地表气温降温过程中表现为“吸”,在升温过程表现为“呼”,导致氧气浓度周期性变化。在此基础上,开发一套多参数低氧超前预警系统,不仅能够实时监测回采工作面与地面的气体情况,还能够预测回采工作面和密闭空间的低氧现象,同时还可对甲烷等有害气体的异常涌出进行预测预报,从而提升矿井的防灾减灾能力。
The low oxygen phenomenon in the goaf of the mining face seriously affects the safety production of the mine,especially during severe changes in atmospheric temperature and pressure.The existing coal mine monitoring system is limited to single parameter monitoring,and there is no single monitoring system for low oxygen phenomenon,which is used to comprehensively predict the abnormal emission of low oxygen gas.Taking No.10 coal seam of Shangyuquan Coal Mine as an example,the factors affecting the emission of low oxygen gas were analyzed through the direct cause of low oxygen gas emission in goaf.The study found that in the case of no obvious air leakage in the goaf,the pressure fluctuation of the working face is the direct cause of the low oxygen gas emission in the goaf.At the same time,the working face is directly connected to the ground,and the change of ground atmospheric parameters directly affects the working face pressure.Through statistical analysis,the regularity of ground temperature,air pressure fluctuation and"breathing"effect in goaf was summarized.The study found that the goaf showed"suction"during the cooling process of the surface temperature and"exhalation"during the heating process,resulting in periodic changes in oxygen concentration.On this basis,a set of multi-parameter low oxygen early warning system was developed,which can not only monitor the gas situation of the mining face and the ground in real-time,but also predict the low oxygen phenomenon of the mining face and the confined space.At the same time,it can also predict and predict the abnormal emission of harmful gases such as methane,so as to improve the disaster prevention and mitigation ability of the mine.
作者
安小磊
张豫鹏
张云峰
陈俊涛
贾慧霖
An Xiaolei;Zhang Yupeng;Zhang Yunfeng;Chen Juntao;Jia Huilin(Shangyuquan Coal Mine,Guoshen Company,CHN Energy,Xinzhou 035600,China;China University of Mining and Technology,Xuzhou 221116,China)
出处
《能源与环保》
2025年第2期62-69,74,共9页
CHINA ENERGY AND ENVIRONMENTAL PROTECTION
基金
国家重点研发计划资助项目(2022YFC3004702)。
关键词
超前预警
低氧
“呼吸”效应
气温
气压
early warning
low oxygen
"breathing"effect
atmospheric temperature
atmospheric pressure
