浅埋复合顶板沿空切顶卸压自动成巷矿压规律研究

发布时间：2018-06-02 18:14

本文选题：浅埋深 + 切顶卸压　；参考：《煤炭科学技术》2017年S1期

【摘要】：基于切顶卸压自动成巷技术原理,通过选取神东矿区哈拉沟煤矿12201工作面,利用现场PU监测系统,对恒阻大变形锚索受力变化规律、顶板离层变化规律、滞后单体支柱支承压力及活柱下缩量变化规律、支柱撤出后巷道围岩位移等状况进行监测,且使用FLAC3D软件建立计算模型,分别对无切缝和有切缝模型进行数值计算,对浅埋、含煤复合顶板切顶卸压自动成巷的矿压显现规律进行研究。研究结果表明:切顶卸压自动成巷技术能够有效切断巷道及采空区顶板之间应力传播途径,使应力集中区远离巷帮,转移到实体煤帮深部位置;由于切缝的存在,巷道顶板的变形不再受采空区顶板垮落下沉影响,因而使得巷道顶板变形得到有效控制,提高了采煤工作面的安全性。
[Abstract]:Based on the principle of automatic roadway forming by cutting roof and unloading pressure, through selecting 12201 working face of Hagou Coal Mine in Shendong mining area, using the field pu monitoring system, the law of force change of anchor cable with constant resistance and large deformation, and the change law of roof separation layer are studied. The changes of supporting pressure and shrinkage under movable pillar, displacement of surrounding rock of roadway after the withdrawal of pillar are monitored, and the calculation model is established by FLAC3D software. The numerical calculation is carried out on the model of no cut joint and cut joint model, and then the shallow burying is carried out. The rock pressure behavior of coal-bearing composite roof cutting and unloading automatic roadway is studied. The research results show that the technology of automatic roadway forming by cutting top and unloading pressure can effectively cut off the way of stress propagation between roadway and roof of goaf, make the stress concentration area far away from roadway side, and transfer to the deep position of solid coal seam, because of the existence of cutting joint, The roof deformation of the roadway is no longer affected by the roof collapse and subsidence in the goaf, so the roof deformation of the roadway is effectively controlled and the safety of the coal face is improved.
【作者单位】：神华集团有限责任公司煤炭生产部;神华神东煤炭集团有限责任公司煤炭生产部;
【基金】：神华集团有限责任公司科技资助项目(SHGF-15-79)
【分类号】：TD322

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