斜顶软煤回采巷道围岩再造承载层控制机理研究
发布时间：2018-10-07 18:26
【摘要】：基于对倾斜煤层回采巷道断面形状、布置方式及失稳机制分析,进行了斜顶巷道基本支护力学计算,建立了斜顶巷道围岩再造承载层力学模型,确定了斜顶巷道再造承载层围岩稳定性影响因素,提出了斜顶巷道围岩再造承载层控制原则与控制技术,最后进行了数值模拟与现场试验。结果表明:倾斜煤层沿顶回采巷道顶煤体积减小,岩层顶板裸露,表层压力减小,但拱脚局部压力增大与松软煤体承载力降低易导致围岩失稳;斜顶巷道失稳分为两帮挤压流动失稳和顶板压缩错动失稳2种形式,两帮再造承载层位置越高、深度越长及顶板倾角越大,巷道围岩越稳定;斜顶巷道围岩再造承载层控制原则为基本支护控制浅部围岩、特殊锚杆锚固软弱煤体与再造承载层体强化的三体协同,采用设计三体协同支护方案后,顶板及两帮变形量受控,支护效果显著。
[Abstract]:Based on the analysis of the section shape, layout mode and instability mechanism of inclined coal seam mining roadway, the basic supporting mechanics calculation of inclined roof roadway is carried out, and the mechanical model of reconstructing bearing layer of inclined roof roadway surrounding rock is established. The factors influencing the stability of the surrounding rock in the reconstituted bearing layer of inclined roof roadway are determined, and the control principle and control technology of the reconstituted bearing layer of the inclined roof roadway are put forward. Finally, the numerical simulation and field test are carried out. The results show that the volume of top coal in mining roadway along the top of inclined coal seam is reduced, the roof of rock is exposed and the pressure of surface layer is reduced, but the increase of local pressure of arch foot and the reduction of the bearing capacity of soft coal can easily lead to the instability of surrounding rock. The instability of inclined roof roadway can be divided into two forms: two side compression flow instability and roof compression staggered instability. The higher the position of the bearing layer, the longer the depth and the bigger the roof inclination angle, the more stable the surrounding rock of the roadway is. The control principle of reconstructing bearing layer of surrounding rock of inclined roof roadway is basic support control of shallow surrounding rock, special bolt anchoring weak coal body and strengthening three-body coordination of reconstructing bearing layer body. After adopting the design of three-body synergistic supporting scheme, the deformation of roof and two sides is controlled. The support effect is remarkable.
【作者单位】： 河南理工大学能源科学与工程学院;煤炭安全生产河南省协同创新中心;河南能化集团永华能源有限公司郭村矿;
【基金】：国家自然科学基金项目(51374091) 河南省教育厅科学技术研究重点项目(14B440001) 焦作市科技攻关计划项目(20151021103453)
【分类号】：TD353
[Abstract]:Based on the analysis of the section shape, layout mode and instability mechanism of inclined coal seam mining roadway, the basic supporting mechanics calculation of inclined roof roadway is carried out, and the mechanical model of reconstructing bearing layer of inclined roof roadway surrounding rock is established. The factors influencing the stability of the surrounding rock in the reconstituted bearing layer of inclined roof roadway are determined, and the control principle and control technology of the reconstituted bearing layer of the inclined roof roadway are put forward. Finally, the numerical simulation and field test are carried out. The results show that the volume of top coal in mining roadway along the top of inclined coal seam is reduced, the roof of rock is exposed and the pressure of surface layer is reduced, but the increase of local pressure of arch foot and the reduction of the bearing capacity of soft coal can easily lead to the instability of surrounding rock. The instability of inclined roof roadway can be divided into two forms: two side compression flow instability and roof compression staggered instability. The higher the position of the bearing layer, the longer the depth and the bigger the roof inclination angle, the more stable the surrounding rock of the roadway is. The control principle of reconstructing bearing layer of surrounding rock of inclined roof roadway is basic support control of shallow surrounding rock, special bolt anchoring weak coal body and strengthening three-body coordination of reconstructing bearing layer body. After adopting the design of three-body synergistic supporting scheme, the deformation of roof and two sides is controlled. The support effect is remarkable.
【作者单位】： 河南理工大学能源科学与工程学院;煤炭安全生产河南省协同创新中心;河南能化集团永华能源有限公司郭村矿;
【基金】：国家自然科学基金项目(51374091) 河南省教育厅科学技术研究重点项目(14B440001) 焦作市科技攻关计划项目(20151021103453)
【分类号】：TD353
【参考文献】
相关期刊论文 前10条
1 辛亚军;安定超;李梦远;;巷道围岩再造承载层机理及数值模拟[J];中国安全生产科学技术;2016年06期
2 程卫民;孙路路;王刚;黄旭超;黄启铭;;急倾斜特厚煤层开采相似材料模拟试验研究[J];采矿与安全工程学报;2016年03期
3 苏学贵;宋选民;李浩春;原鸿鹄;李本奎;杜献杰;;特厚倾斜复合顶板巷道破坏特征与稳定性控制[J];采矿与安全工程学报;2016年02期
4 王襄禹;柏建彪;王猛;;弱面影响下深部倾斜岩层巷道非均称失稳机制与控制技术[J];采矿与安全工程学报;2015年04期
5 程士宜;王宗林;梁冰;李刚;;急倾斜厚煤层回采巷道联合支护技术[J];辽宁工程技术大学学报(自然科学版);2015年05期
6 王猛;柏建彪;王襄禹;陈斌;韩志婷;;深部倾斜煤层沿空掘巷上覆结构稳定与控制研究[J];采矿与安全工程学报;2015年03期
7 陈新忠;王猛;;深部倾斜煤层沿空掘巷围岩变形特征与控制技术研究[J];采矿与安全工程学报;2015年03期
8 张向阳;杨科;;回采巷道受力特征倾角效应及支护参数优化研究[J];地下空间与工程学报;2013年S1期
9 辛亚军;勾攀峰;，
本文编号：2255221
本文链接：https://www.wllwen.com/kejilunwen/kuangye/2255221.html
