综放巷内预充填无煤柱掘巷围岩变形特征与控制

发布时间：2018-05-03 20:42

本文选题：无煤柱掘巷 + 巷内预充填　；参考：《采矿与安全工程学报》2017年02期

【摘要】：巷内预充填无煤柱护巷技术是在上工作面平巷内紧靠非截割帮预先构筑充填体墙,本工作面掘平巷时沿充填体掘巷,实现无煤柱开采。采用FLAC3D对综放巷内预充填无煤柱掘巷围岩的变形与破坏特征进行数值模拟,结果表明该巷道变形呈现非均匀性,并进一步对巷道围岩进行不稳定分区:巷道浅部顶板"拉破坏区",顶煤、基本顶与直接顶的分层处"剪切错动离层区",充填体帮肩角"压剪切落区",实体煤帮"高应力压剪区"。在此基础上提出"分区非匀称支护"技术体系,即以高强高预应力让压锚杆和倾斜锚索为支护主体,且将锚索整体向充填体偏移,从而使巷道变形协调。研究结果在潞安集团常村煤矿进行井下试验与应用,有效控制了无煤柱掘巷围岩的变形。
[Abstract]:The technology of protecting roadway without coal pillar with pre-filling in the roadway is to construct the filling wall in front of the non-cutting side in the upper face, and to realize the mining without coal pillar when the roadway is excavated along the filling body. FLAC3D is used to simulate the deformation and failure characteristics of surrounding rock of roadway without coal pillar filling in fully mechanized caving roadway. The results show that the deformation of this roadway is non-uniform. Furthermore, the unstable zoning of roadway surrounding rock is carried out: "tensile failure area" of shallow roof of roadway, "top coal", "shear dislocation zone" at stratification of basic top and direct roof, "pressure shear area" at shoulder angle of filling body, and "high pressure shear zone" for solid coal side. On the basis of this, the technical system of "sub-area non-symmetrical support" is put forward, that is, the anchor rod and inclined anchor cable are used as the main supporting body, and the whole anchor cable is shifted to the filling body, which makes the roadway deformation coordinate. The results are used in underground test and application in Changcun Coal Mine of Lu'an Group to effectively control the deformation of roadway surrounding rock without coal pillar.
【作者单位】：江西理工大学资源与环境工程学院;中国矿业大学煤炭资源与安全开采国家重点实验室;江西省安全生产科学技术研究中心;北京科技大学土木与资源工程学院;
【基金】：国家自然科学基金项目(51604126,51664018,51364012) 江西省科技支撑计划项目(20143ACG70010) 江西省教育厅青年基金项目(3204704054) 江西理工大学博士启动基金项目(jxxjbs15003)
【分类号】：TD322

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