高应力软岩巷道底鼓机理及控制实践

发布时间：2018-03-30 00:34

本文选题：高应力软岩　切入点：挤压流动性底鼓　出处：《采矿与安全工程学报》2017年02期

【摘要】：为探索高应力软岩巷道底鼓治理方法,以潘一东矿西翼主胶带机大巷三联巷为研究对象,在调研其工程地质条件及底鼓概况的基础上,采用FLAC3D5.0软件分析了其底鼓机理;研发出适用于底板加固的端锚锚索束,提出了以端锚锚索束为主的底鼓控制方案;采用数值方法验证了底鼓控制效果,并将底鼓控制方案应用于工程实践。研究结果表明:三联巷底鼓属于挤压流动性底鼓,在两帮挤压效应作用下,底板整体凸起;端锚锚索束高支护刚度与高延伸性为相互制约关系,兼顾二者可以确定端锚锚索束参数;巷道底板加固会弱化两帮的挤压效应,改善帮顶支护结构工况;端锚锚索束在实现全孔注浆的同时兼具高锚固力及高延伸性,对高应力软岩巷道底鼓具有良好的控制效果。
[Abstract]:In order to explore the method of controlling the bottom heave of soft rock roadway with high stress, taking the main belt machine roadway of the west wing of Panyidong Mine as the research object, based on the investigation of the engineering geological conditions and the general situation of the bottom heave, the mechanism of the bottom heave is analyzed by using FLAC3D5.0 software. The end anchor cable bundle which is suitable for the bottom plate reinforcement is developed, and the bottom drum control scheme is put forward, which is based on the end anchor cable bundle, and the numerical method is used to verify the bottom drum control effect. The control scheme of bottom drum is applied to engineering practice. The research results show that the bottom drum of triple roadway belongs to extruded fluidity bottom drum, and under the action of two side extrusion effect, the whole floor is raised. The relationship between the high support stiffness and the high extension of the end anchor cable bundle is mutually restricted, and the parameters of the end anchor cable bundle can be determined by taking both of them into account, and the strengthening of the roadway bottom plate will weaken the extrusion effect of the two bands and improve the working condition of the roof supporting structure. The end anchor cable bundle has both high anchoring force and high extensibility to realize full hole grouting and has good control effect on the bottom heave of soft rock roadway with high stress.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;天地科技股份有限公司开采设计事业部;中国矿业大学深部煤炭资源开采教育部重点实验室矿业工程学院;
【基金】：教育部科技项目创新团队项目(IRT_14R55) 国家自然科学基金项目(U1261211) 江苏省基础研究计划项目(BK20151145)
【分类号】：TD322;TD353

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