【摘要】 针对潞宁煤业22116工作面回采期间支架与煤壁稳定性等问题,采用数值模拟及现场实测进行分析,结果显示:同一支护条件下,当回采速度越快,液压支架承受上覆岩层压力越大,煤壁变形也越大;反之,回采速度越慢,液压支架承受上覆岩层压力越小,煤壁变形也越小,两者体现出很好的同步性;且回采速度对减小煤壁片帮有重要影响;不同支护条件下,随着液压支架支护阻力的增加,煤壁变形逐渐减小,两者之间呈现较好的反比关系,与现场监测数据一致.更多还原

【Abstract】 In view of the stability of support and coal wall during 22116 mining in Luning coal industry, this paper adopts numerical simulation and field measurement to analyze. The analysis results show that: under the same support condition, the faster the mining speed is, the greater the pressure of the overlying strata is, the greater the deformation of coal wall is; on the contrary, the slower the mining speed is, the smaller the pressure of the overlying strata is, and the coal wall changes the smaller the shape is, the better the synchronization is; and the mining speed has an important impact on the reduction of coal wall spalling; under different support conditions, with the increase of hydraulic support support resistance, the coal wall deformation gradually decreases, showing a good inverse relationship between the two, consistent with the field monitoring data.更多还原