沿空留巷不均衡承载围岩控制技术
Unbalanced Bearing Surrounding Rock Control Technology of Gob-side Entry Retaining
-
摘要: 针对新元煤矿3414工作面沿空巷道不均衡承载现象，结合3414工作面生产地质条件，建立巷道承载力学模型和UDEC Trigon数值计算模型，理论计算得到巷道不均衡承载系数kσ为2.93，表明巷道实体煤帮承受荷载大于充填体帮，巷道围岩裂隙以剪切裂隙为主，充填区域顶板在基本顶和充填体强大的垂直挤压力作用下，发生张拉裂破坏和剪切破坏，并沿充填体内侧断裂，表明该区域为沿空留巷围岩控制的薄弱环节。工业试验表明，采用及时支护充填区域顶板的围岩综合控制技术，可有效控制沿空留巷围岩稳定。
-
关键词:
- 沿空留巷 /
- 不均衡承载 /
- 力学模型 /
- UDEC Trigon /
- 围岩控制
Abstract: According to the unbalanced bearing phenomenon of 3414 working face in Xinyuan Coal Mine, based on the production geological conditions of 3414 working face, the bearing capacity mechanics model and UDEC Trigon numerical calculation model are established. The theoretical bearing coefficient of roadway unbalance is 2.93, which indicates that the bearing capacity of roadway coal body is larger than that of filling body; the rationality of micro-mechanics parameters of the rock strata in the model is validated. It is found that the fracture of surrounding rock is mainly shear fracture, the roof in mining area occurs tension and shear damage under the influence of strong vertical pressure of basic roof and the filling body; it shows that the area is a weak link in the control of the surrounding rock. The industrial experiment shows that the comprehensive control technology of the surrounding rock effectively controls the surrounding rock stability of the gob-side entry retaining. -
-
[1] 钱鸣高,许家林,缪协兴. 煤矿绿色开采技术[J]. 中国矿业大学学报,2003(4):5-10. [2] 孙恒虎,吴健,邱运新.沿空留巷的矿压规律及岩层控[J].煤炭学报,1992(1):15-24. [3] 陈勇,柏建彪,朱涛垒,等.沿空留巷巷旁支护体作用机制及工程应用[J].岩土力学,2012,33(5):1427. [4] 陈勇.沿空留巷围岩结构运动稳定机理与控制研究[D].徐州:中国矿业大学,2012. [5] 张自政,柏建彪,陈勇,等.沿空留巷不均衡承载特征探讨与应用分析[J].岩土力学,2015(9):2665. [6] 侯朝炯,马念杰.煤层巷道两帮煤体应力和极限平衡区的探讨[J].煤炭学报,1989(4):21-29. [7] Itasca Consulting Group Inc. UDEC Version 6.0[M]. Minneapolis: Itasca, 2014. [8] Gao FQ, Stead D. The application of a modified Voronoi logic to brittle fracture modelling at the laboratory and field scale[J].Int J Rock Mech Min Sci, 2014(68):1-14. [9] Xuehua Li, Minghe Ju, Qiangling Yao, et al.Numerical investigation of the effect of the location of critical rock block fracture on crack evolution in a gob-side filling wall[J].Rock Mech Rock Eng, 2016(49): 1041-1058. [10] 王鹏,张耀辉.沿空留巷巷旁高水充填材料性能改进[J].煤矿安全,2016,47(2):51-54. -
期刊类型引用(9)
1. 叶建坤，牛涛涛，刘全福. 余吾煤业负压抽采瓦斯规律及动态调控研究. 煤. 2025(02): 69-72 . 
百度学术
2. 葛新玉. 煤层瓦斯抽采钻孔智能调控技术研究与应用. 山东煤炭科技. 2024(04): 71-75+81 . 百度学术
3. 李泉新，程卓尔，方俊，牟全斌，刘飞，丛琳. 定向长钻孔瓦斯抽采负压变化规律及监测控制技术研究进展. 煤田地质与勘探. 2024(11): 171-182 . 百度学术
4. 李文彬. 新元煤矿综采面瓦斯抽采技术优化及效果分析. 江西煤炭科技. 2023(03): 159-161+165 . 百度学术
5. 吴泽平，刘军，张露伟，卢鹏，刘志宽. 定向长钻孔孔内压力分布规律及影响机制研究. 煤矿安全. 2023(11): 1-8 . 本站查看
6. 王涛，张文康，赵伟，刘德成，魏风清，张益民. 低浓度抽采钻孔综合修复技术应用研究. 能源与环保. 2023(12): 115-120 . 百度学术
7. 穆春明，孙向锋，唐家豪，王岳栩. 白坪矿煤层瓦斯抽采技术优化试验研究. 中国煤炭. 2022(03): 37-41 . 百度学术
8. 王月红，吴怡，张九零. 采空区抽采负压对自燃规律数值模拟研究. 煤炭工程. 2020(01): 106-110 . 百度学术
9. 王森，张驰. 不同抽采负压对瓦斯抽采效果的影响. 内蒙古煤炭经济. 2019(24): 157 . 百度学术
其他类型引用(6)
计量
- 文章访问数: 240
- HTML全文浏览量: 0
- PDF下载量: 0
- 被引次数: 15
下载:
