新景矿综采工作面自燃“三带”范围分布规律研究

Study on the distribution law of'three zones'range of spontaneous combustion in fully mechanized mining face of Xinjing Mine

山西新景矿15317综放工作面属于Ⅱ类自燃煤层,为确保安全推进速度,需要对采空区自燃“三带”进行测定。此次测定利用煤自然发火临界氧浓度指标来划分,采用束管监测监控技术对15317综放工作开采期间采空区氧气浓度进行了实测,并据此对采空区自燃“三带”进行了划分,同时计算了工作面的最小安全推进速度,为工作面安全开采提供了数据支持。

The 15317 fully-mechanized caving face of Shanxi Xinjing Mine belongs to class II spontaneous combustion coal seam.In order to ensure the safe advance speed,it is necessary to measure the spontaneous combustion'three zones'in the goaf.This measurement uses the critical oxygen concentration index of coal spontaneous combustion to divide,and uses the beam tube monitoring and monitoring technology to measure the oxygen concentration in the goaf during the mining period of 15317 fully mechanized caving face,and accordingly divides the'three zones'of spontaneous combustion in the goaf.At the same time,the minimum safe advancing speed of the working face is calculated,which provides data support for the safe mining of the working face.