Zhongyang County Emergency Management Bureau

为提高付家焉煤业10106综放工作面的顶煤回收率,首先对工作面支架上方顶煤的块度级配进行了现场实测,然后将测量结果引入数值模拟中,并分析了放煤厚度及放煤步距对顶煤放出量的影响,确定出合理的放煤厚度为2.5m,采高为3m,合理放煤步距为0.8m。现场应用结果表明,采用优化的放煤工艺后,顶煤的平均回收率为86.5%,工作面平均回收率为90.41%,放煤效果较理想。

In order to improve the recovery rate of top coal in the 10106 fully mechanized caving face of Fujiayan Coal Industry, on-site measurements are first conducted on the lumpiness grading of the top coal above the support of the working face. The measurement results are then introduced into numerical simulation, and the influence of coal caving thickness and step distance on top coal release amount is analyzed. A reasonable coal caving thickness of 2.5 m, a mining height of 3 m, and a reasonable coal caving step distance of 0.8 m are determined. The on-site application results show that after adopting the optimized coal caving process, the average recovery rate of the top coal is 86.5%, and the average recovery rate of the working face is 90.41%, indicating an ideal coal caving effect.