School of Energy and Engineering, Henan Polytechnic University
Shanxi Lanhua Group Luhe Coal Industry Co. , Ltd.
Xingdong Coal Mine,Jizhong Energy Group Co. , Ltd.
CCTEG Chongqing Research Institute

为解决深部连续充填工作面沿空掘巷围岩控制问题,以邢东矿1128运输巷为工程背景,借助FLAC3D数值模拟软件,探究1126工作面采空区在不同充填率条件下沿空掘巷围岩偏应力分布规律,模拟分析充填开采工作面超前段受开采影响的围岩偏应力演化特征。研究发现:巷道浅部围岩形成环全断面低偏应力区,顶板低值区深度明显小于两帮与底板,低值区外的巷道四边均有一个偏应力高值区;围岩最大偏应力区位于巷道右上部,峰值大于20MPa,当充填率大于90%时,巷道围岩四周偏应力值逐渐减小且沿巷道两帮呈对称分布;充填开采对超前段巷道围岩形成的高集中应力主要分布在工作面前方0~15m,巷道顶、底板两尖角处围岩受巷道围岩偏应力影响形成4个“突出变形区”。结合模拟分析结果、锚杆索预应力承载结构及采空区高水材料充填性能,提出巷道围岩“超强锚杆+大直径高延伸率锚索”联合支护技术,并应用于现场工程实践,结果表明该技术可实现对深部连续开采充填工作面沿空掘巷围岩的有效控制。

In order to solve the problem of surrounding rock control of gob-side entry driving in deep continuous fillingdecreases and is symmetrically distributed along the two sides of the roadway; the high concentrated stress formed by filling mining on the surrounding rock of the roadway in the leading section is mainly distributed 0 m to 15 m in front of the working face. The surrounding rock at the two corners of the roof and floor of the roadway is affected by the deviatoric stress of the roadway surrounding rock to form four “ prominent deformation areas”. Combined with the simulation analysis results, the prestressed bearing structure of rockbolt and anchor cable and the filling performance of high water material in goaf, the combined support technology of “super strong bolt + large diameter and high elongation cable” in roadway surrounding rock is proposed and applied to field engineering practice. The results show that this technology can effectively control the surrounding rock of gob-side entry driving of filling face in deep continuous mining.

汪隆靖,邢世坤,易恩兵,等. 深部连续开采充填工作面沿空掘巷围岩偏应力演化与控制[J]. 矿业安全与环保,2023,50(3):81-88.

WANG Longjing,XING Shikun,YI Enbing,et al. Evolution and control on deviatoric stress in surrounding rock of gob-side entry driving of filling face in deep continuous mining[J]. Mining Safety & Environmental Protection,2023,50(3):81-88.