近距离煤层联合开采自然发火规律研究

Study on spontaneous combustion law during combined mining of close-distance coal seams

针对山西灵石华苑煤业有限公司近距离煤层上、下工作面联合开采引起的采空区自然发火问题,采用能位测定与SF6示踪技术相结合的方法检测复杂采空区漏风通道、判断漏风方向、估计漏风风速.现场结果表明,该方法有利于提高复杂采空区漏风检测的效率和准确性,避免单一SF6示踪技术盲目性,对预防近距离煤层采空区煤炭自燃具有实际意义.

Aiming at the spontaneous combustion problem in gob caused by combined mining of upper and lower working faces of close-distance coal seams in Shanxi Lingshi Huayuan Coal Industry Co., Ltd., energy level measurement method and SF 6 tracer technology were adopted to detect the air leakage ways of complex gobs and judge the air leakage direction and estimate the air leakage speed. The field test results showed that the methods were helpful to improve the efficiency and accuracy of air leakage detection in complex gobs and avoid the blindness of single SF 6 tracer technology, and had practical significances for preventing coal spontaneous combustion in gobs of close-distance coal seams.