A Study on Preventing Spontaneous Combustion of Residual Coal in a Coal Mine Goaf
A Study on Preventing Spontaneous Combustion of Residual Coal in a Coal Mine Goaf
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DOI：
10.1155/2015/712349
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发表时间：
2015-03
期刊：
影响因子：
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通讯作者：
Yongjun Wang;Xiaoming Zhang;Y. Sugai;K. Sasaki
中科院分区：
文献类型：
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作者：
Yongjun Wang;Xiaoming Zhang;Y. Sugai;K. Sasaki
对中国海子煤矿采空区煤自燃预防注浆方案的有效性进行了模拟。该煤矿已运行超过27年，通风网络复杂，存在气流泄漏，可能导致采空区煤炭自燃。首先，利用矿井通风模拟器MIVENA对矿井通风网络气流进行分析，以控制进出工作面和采空区的气流。第二种方法是通过模拟器FLUENT进行数值模拟，以预测#3205采空区漏流残煤的自燃。明确了根据采空区氧气浓度可将采空区划分为三个区域。最后，数值模拟结果表明，浆液注浆法是一种有效且经济的减少采空区孔隙度、防止残煤自燃的方法。
The effectiveness of grouting scheme has been simulated to prevent the coal spontaneous combustion at a goaf in Haizi Colliery, China. The colliery has been operated for long period over 27 years and has a complex ventilation network including airflow leakages which could possibly lead to the spontaneous combustion of coal at goafs. Firstly, the mine ventilation simulator MIVENA was used to analyze the mine ventilation network airflows to control airflows in and out of working faces and goafs. As the second approach, numerical simulations were carried by the simulator FLUENT in order to predict spontaneous combustion of residual coal with leakage flow in the #3205 goaf. It was cleared that the goaf can be divided into three zones based on oxygen concentration in the goaf area. Finally, the numerical simulation results show that the slurry grouting method is able to be an effective and economical method by reducing porosity in the goaf area to prevent spontaneous combustion of residual coal.