切顶卸压无巷旁充填沿空留巷采空区侧巷帮形成规律
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摘要
针对鹿台山煤矿矿井采掘接续紧张状况,对2202工作面轨道巷进行了切顶卸压无巷旁充填沿空留巷试验。理论分析了沿空留巷采空区侧巷帮形成过程,并在工作面后方沿空留巷巷帮采用"挡矸金属网+可伸缩U型钢+木板背帮"方式进行挡矸防护,对工作面回采期间巷道围岩变形进行了观测,总结了切顶卸压沿空留巷采空区侧巷帮形成规律。研究表明:采用沿空留巷可以使回采工作面少掘1条区段巷道,减少煤柱损失,实现连续开采。
In view of the continuous tension of mining in the coal mine of Lutaishan Coal Mine,the test of side roadway side of the goaf along the goaf with the top relief pressure of 2202 working face is done.The formation process of side roadway of goaf retaining roadway along goaf is analyzed theoretically,and gangue retaining roadway along goaf behind working face is protected by "gangue retaining metal net+retractable U-shaped steel + wooden backwall".The surrounding rock deformation data of roadway during mining are continuously observed,and the regularity characteristics of side roadway formation of goaf retaining roadway along goaf during roof cutting and pressure relief are summarized.The study results show that the excavation work of one roadway of mining working face can be avoided by gob-side entry retaining,the loss of coal pillar can be reduced,and the goal of continuous mining is realized.
In view of the continuous tension of mining in the coal mine of Lutaishan Coal Mine,the test of side roadway side of the goaf along the goaf with the top relief pressure of 2202 working face is done.The formation process of side roadway of goaf retaining roadway along goaf is analyzed theoretically,and gangue retaining roadway along goaf behind working face is protected by "gangue retaining metal net+retractable U-shaped steel + wooden backwall".The surrounding rock deformation data of roadway during mining are continuously observed,and the regularity characteristics of side roadway formation of goaf retaining roadway along goaf during roof cutting and pressure relief are summarized.The study results show that the excavation work of one roadway of mining working face can be avoided by gob-side entry retaining,the loss of coal pillar can be reduced,and the goal of continuous mining is realized.
引文
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[2] 李有春.综放工作面巷旁充填沿空留巷支护技术研究[J].山西煤炭,2018(2):17-20.
[3] 马广兴.柔模混凝土沿空留巷和切顶卸压沿空留巷对比分析[J].能源与环保,2018(10):185-189.
[4] 侯忠杰.对浅埋煤层“短砌体梁”、“台阶岩梁”结构与砌体梁理论的商榷[J].煤炭学报,2008(11):1201-1204.
[5] 黄洁,杨壮,王火彬,等.坚硬顶板预裂爆破切顶卸压沿空留巷技术研究[J].煤炭与化工,2017(10):61-63.
[6] 朱珍,张科学,袁红平.切顶卸压沿空留巷碎石巷帮控制技术及应用[J].煤炭科学技术,2018(3):25-32.
[7] 丁涛.高水速凝材料隔离墙在矿井回采工作面中的应用[J].煤矿现代化,2018(3):37-42.
[8] 吕学刚.膏体充填开采条带煤柱覆岩运移规律研究[J].煤炭科技,2018(3):41-43.
[9] 马广兴.柔模混凝土沿空留巷和切顶卸压沿空留巷对比分析[J].能源与环保,2018(10):185-189.
[10] 侯永鹏.深孔爆破预裂顶板及其对综放面初采期矿压与瓦斯影响规律的研究[D].太原:太原理工大学,2017.
[11] 高晓将,朱建明.综放工作面端头区弧形板形成的力学机理分析[J].山西建筑,2016(3):62-64.
[12] 王文杰.切顶卸压沿空留巷技术爆破工艺应用[J].煤,2018,27(8):15-16.
[13] 张宇,陈占清.沿空留巷围岩受力变形特征及其支护优化设计[J].煤炭工程,2018,50(10):130-133.