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为研究浅埋薄煤层工作面矿压显现规律及支架适应性情况,利用现场监测数据和现场工作面来压情况对石圪台煤矿71301薄煤层工作面进行分析和研究。结果表明:71301薄煤层工作面初次来压步距约35 m,周期来压步距约10.05 m,支架动载系数约1.52;工作面整体表现为先中下部来压,然后迅速向顶部延伸,上部来压距离滞后下部3~5 m左右;周期来压期间,支架平均工作阻力4 548 k N,为额定工作阻力的44.6%,支架具有较大的富裕量,建议在同类型地质条件下可选用额定工作阻力7 500~8 000 k N的支架。
In order to study the rule of underground pressure and the adaptability of support in shallow thin coal seam, the working face of 71301 thin coal seam in Shitutai Coal Mine was analyzed and studied by using the on-site monitoring data and the pressure of on-site working face. The results show that for the first time, the working face of 71301 thin coal seam comes with a pressure step of about 35 m for the first time, the pressure step distance is about 10.05 m and the dynamic load coefficient of the stent is about 1.52. The overall performance of the working face is that the middle and lower parts of the working face compress and then rapidly extend to the top, The upper part of the pressure from the lower part of the lag about 3 ~ 5 m; period to pressure period, the average working resistance bracket 4 548 kN, 44.6% of the rated working resistance, stents have a greater abundance, it is proposed in the same type of geological conditions Selection of rated working resistance 7 500 ~ 8 000 k N bracket.