近距离跨采巷道矿压显现规律及支护研究
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摘要
以翟镇煤矿6202E工作面跨采下部巷道6401E运输巷为工程背景,在分析2～4层煤地质条件的基础上,对6202E面开采后底板破坏最大深度及影响范围进行了力学计算,提出了锚索桁架+木垛联合支护方式,使巷道在跨采期间受动压影响时的稳定性大大提高,该支护方式可为近距离煤层群下煤层巷道的加强支护提供一定的借鉴意义。
Taking the 6202E working face of the Zhaizhen coal mine across the 6401E transportation lane of the lower roadway as the engineering background, based on the analysis of the geological conditions of the 2 to 4 layer coal, the mechanical calculation of the maximum depth of damage and the impact range of the bottom plate after the 6202E surface mining was carried out. The joint support method of anchor cable truss+wood stack is put forward, which can greatly improve the stability of the roadway affected by dynamic pressure during the cross-mining period. This support method can provide some reference significance for strengthening the support of the coal seam roadway under the close coal seam group.
Taking the 6202E working face of the Zhaizhen coal mine across the 6401E transportation lane of the lower roadway as the engineering background, based on the analysis of the geological conditions of the 2 to 4 layer coal, the mechanical calculation of the maximum depth of damage and the impact range of the bottom plate after the 6202E surface mining was carried out. The joint support method of anchor cable truss+wood stack is put forward, which can greatly improve the stability of the roadway affected by dynamic pressure during the cross-mining period. This support method can provide some reference significance for strengthening the support of the coal seam roadway under the close coal seam group.
引文
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[2]薛吉胜,范志忠,黄志增.极近距离煤层采空区下工作面两巷合理位置确定[J].煤炭科学技术, 2012, 40(4):37-41.
[3]张百胜.极近距离煤层开采围岩控制理论及技术研究[D].太原:太原理工大学, 2008.
[4]王路军,朱卫兵,许家林,等.浅埋深极近距离煤层工作面矿压显现规律研究[J].煤炭科学技术, 2013, 41(3):47-50.
[5]李良林,陈怀合,聂建湘.近距离煤层开采的矿压显现[J].煤炭技术, 2004,23(11):51-53.
[6]李学华,杨宏敏,张东升.下伏煤层开采引起的大巷变形规律模拟研究[J].煤炭学报,2006(1):1-5.
[7]孟鹏飞.近距离煤层下煤层回采巷道合理布置的研究[J].山西焦煤科技, 2014,38(2):38-40.