小煤柱综放工作面相邻采空区自燃灾害综合治理技术

针对小煤柱综放工作面相邻采空区存在漏风大、遗煤多,易引发采空区遗煤自燃的问题,提出由采空区自燃观测系统、小煤柱加固堵漏及向采空区灌注无机防灭火材料所组成的采空区自燃灾害综合治理技术,并在阳煤一矿81303综放工作面相邻采空区进行了工程实践。结果表明,采用以小煤柱加固堵漏与采空区注浆为主的自燃灾害综合治理技术后,原采空区的自燃高温点遗煤温度及CO体积分数明显下降,其中3^#观测孔温度由35.1℃降为25.2℃,CO体积分数由3.7×10^-5降为1.2×10^-5,有效消除了采空区的自燃隐患,保证了81303综放工作面的生产安全。

Comprehensive control technology of spontaneous combustion disaster in adjacent goaf in fully mechanized caving face with small coal pillar

In view of the problems of large air leakage and large residual coal in adjacent goaf in fully mechanized caving face with small coal pillars,which are easy to cause spontaneous combustion of residual coal in goaf.This paper put forward a comprehensive control technology of spontaneous combustion disaster in goaf,which was composed of spontaneous combustion observation system of goaf,reinforcement and plugging of small coal pillar and pouring in organic fire prevention and fire extinguishing materials into goaf.The engineering practice was carried out in adjacent goaf in 81303 fully mechanized caving face of No.1 Mine in Yangquan Coal Group.The results show that,after adopting the comprehensive control technology of spontaneous combustion disaster based on small coal pillar reinforcement and grouting in goaf,the temperature of residual coal and the volume fraction of CO in goaf decreases obviously,in which the temperature of the 3^#observation hole decreases from 35.1℃to 25.2℃,and the volume fraction of CO decreases from 3.7×10^-5 to 1.2×10^-5,which effectively eliminates the hidden danger of spontaneous combustion in goaf and ensures the production safety of 81303 fully mechanized caving face.