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以丁集煤矿1282(3)工作面为工程背景,采用超前支承压力分段简化,构建了底板应力分布表达式,通过矿压实测数据代入后计算得到前方底板不同深度处应力增量集中系数,得出采动超前影响范围110m。考虑计算时忽略巷道自身开掘及长期蠕变的影响,最后通过底大巷实测、综合收作段地质条件进一步确定了合理的停采线为177m,研究成果为类似条件下的巷道维护及煤柱留设提供一定参考。
Taking the 1282 (3) face of Dingji Coal Mine as the engineering background, the stress distribution of the floor was constructed by simplifying the supporting pressure ahead of stage, and the stress concentration concentration coefficient at different depths of the front floor was calculated through substituting the measured data. Obtained mining lead the scope of influence 110m. Considering the influence of tunnel digging itself and long-term creep when considering the calculation, finally the reasonable stopping and shutting-down line is confirmed through the measurement of bottom and main roadway and the geological conditions of the closing section. The research results are the roadway maintenance and coal pillar under similar conditions Set aside to provide some reference.