Analysis on Effect of Grouting in Compound Goaf of 010910 Working Face in Wuhushan Coal Mine

Abstract

To solve the problem of oxidation and spontaneous combustion of residual coal in 010910 working surface of Wuhushan Coal Mine, it is necessary to conduct real-time dynamic stratification monitoring of the goaf area of the overlying working face and the goaf area of the 010910 working face within the appropriate upper corner of the return air lane by means of upward directional observation and treatment of the borehole and the beam tube sampler embedded in the 010910 working face. After the occurrence of CO concentration increase and other signs of residual coal spontaneous combustion in the dynamic stratification monitoring state of the composite goaf, the directional borehole constructed in the upper layer and the grouting pipe in the return air lane of this layer are used to implement the combined grouting treatment measures of the upper and lower floors. The results show that the concentration of CO gas in the borehole decreases continuously after the implementation of high and low joint grouting.

Keywords

• compound goaf
• spontaneous combustion of residual coal
• layered monitoring
• combined grouting
• fire fighting