›› 2017, Vol. 38 ›› Issue (4): 1103-1113.doi: 10.16285/j.rsm.2017.04.023

• 岩土工程研究 • 上一篇    下一篇

深井综放沿空掘巷实体煤帮变形破坏机制及控制技术

张元超1,杨圣奇1, 2,陈 淼1,臧传伟3,龙景奎1   

  1. 1. 中国矿业大学 深部岩土力学与地下工程国家重点实验室,江苏 徐州 221116;2. 中国矿业大学 力学与土木工程学院,江苏 徐州 221116; 3. 山东科技大学 矿业与安全工程学院,山东 青岛266590
  • 收稿日期:2016-07-18 出版日期:2017-04-11 发布日期:2018-06-05
  • 通讯作者: 杨圣奇,男,1978年生,教授,博士后,博士生导师,主要从事深部岩石力学与地下工程方面的研究。E-mail: yangsqi@hotmail.com E-mail:zhangyc4418@163.com
  • 作者简介:张元超,男,1992年生,硕士研究生,主要从事深部巷道围岩锚固控制机制及技术方面的研究
  • 基金资助:

    江苏省杰出青年基金项目(No. BK20150005);国家自然科学基金项目(No. 41272344,No.51674251,No. 51374199)。

Deformation and failure mechanism of entity coal side and its control technology for roadway driving along next goaf in fully mechanized top coal caving face of deep mines

ZHANG Yuan-chao1, YANG Sheng-qi1, 2, CHEN Miao1, ZANG Chuan-wei3, LONG Jing-kui1   

  1. (1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; 2. School of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; 3. College of Mining and Safety Engineering, Shandong University of Science and Technology, Qingdao, Shandong 266590, China
  • Received:2016-07-18 Online:2017-04-11 Published:2018-06-05
  • Supported by:

    This work was supported by the Excellent Youth Foundation of Jiangsu Scientific Committee (BK20150005), the National Natural Science Foundation of China -General Program (41272344, 51674251, 51374199).

摘要: 东滩煤矿1306轨道顺槽掘进期间,实体煤帮出现大变形破坏,挤压鼓出严重。采用离散元数值模拟分析了深井综放沿空掘巷掘进期间基本顶断裂位置的变化及围岩应力、位移的演化规律。揭示了实体煤帮大变形破坏机制:沿空掘巷诱发围岩大结构中关键块体的回转沉降,导致基本顶断裂线向实体煤侧转移。顶板结构的变化引起实体煤侧支承压力的显著升高并产生大范围的高应力挤压区,使实体煤侧表现出大变形与强流变的破坏特征。基于对实体煤帮变形破坏机制的分析,提出高强让压长锚索联合锚网的实体煤帮控制技术。数值模拟与现场试验表明,实体煤帮采用破断力为600 kN,让压点为260~300 kN的?22 mm×6 800 mm长锚索加强支护后,水平大变形得到有效控制,实体煤帮变形量控制在300 mm内,保证了巷道在掘进期间的稳定性。

关键词: 沿空掘巷, 实体煤帮, 控制技术, 深井综放, 离散元模拟

Abstract: The entity coal side of 1306 tailgate, Dongtan mine, showed evident large deformation and serious squeezing failure during excavation. The UDEC (Universal Distinct Element Code) model of roadway driving along next goaf in the fully mechanized top coal caving face of deep mines is established to analyze the failure location of main roof and the evolution law of stress and displacement of surrounding rock. The mechanisms of deformation and failure of the entity coal side are revealed that the rotation of key block in main roof results in the inside shift of its fracture line. The high abutment pressure caused by the movement of the roof structure is distributed on entity coal side. The high squeezing stress finally leads to strong extrusion and rheological behavior of entity coal side. Based on the analysis of failure mechanisms of the entity coal side, supporting measures are proposed by combining bolt-mesh and long cables with high strength and yielding capability. Numerical results and field monitoring data show that the large deformation of entity coal side is decreased effectively, and its displacement is well controlled within 300 mm in the support of ?22 mm×6 800 mm long cables with the strength of 600 kN and yielding capability of 260~300 kN. The stability of 1306 roadway is guaranteed by these supporting measures.

Key words: roadway driving along next goaf, entity coal side, control technology, fully mechanized top coal caving face of deep mine, distinct element modelling

中图分类号: 

  • TD 353

[1] 王朋飞,冯国瑞,赵景礼,Yoginder P. Chugh ,王志强,. 长壁工作面巷顶沿空掘巷围岩应力分析[J]. , 2018, 39(9): 3395-3405.
[2] 蒋明镜 ,刘 蔚 ,孙 亚 ,张 宁 ,王华宁 . 考虑环境劣化非贯通节理岩体的直剪试验离散元模拟[J]. , 2017, 38(9): 2728-2736.
[3] 沈 威,窦林名,刘 鹏,贺 虎, . 沿空掘巷应力动态变化规律研究[J]. , 2016, 37(S1): 489-494.
[4] 张广超,何富连. 大断面综放沿空巷道煤柱合理宽度与围岩控制[J]. , 2016, 37(6): 1721-1728.
[5] 张家玲,徐光辉,蔡 英. 连续压实路基质量检验与控制研究[J]. , 2015, 36(4): 1141-1146.
[6] 江 贝 ,李术才 ,王 琦 ,朱维申 ,王德超 , 王富奇 ,王洪涛 ,阮国强 ,邵 行,. 基于非连续变形分析方法的深部沿空掘巷围岩变形破坏及控制机制对比研究[J]. , 2014, 35(8): 2353-2360.
[7] 彭林军 ,张东峰 ,郭志飚 ,段庆伟,. 特厚煤层小煤柱沿空掘巷数值分析及应用[J]. , 2013, 34(12): 3609-3616.
[8] 任建喜 ,张引合 ,冯 超. 地铁隧道盾构施工引起的古城墙变形规律及其控制技术[J]. , 2011, 32(S1): 445-0450.
[9] 徐学勇,汪 稔,孟庆山,江 浩. 深厚淤泥爆破挤淤震动效应测试与控制技术[J]. , 2008, 29(12): 3256-3260.
[10] 陈 庆 ,王宏图 ,胡国忠 ,李晓红 ,李开学 ,庞 成,. 隧道开挖施工的爆破振动监测与控制技术[J]. , 2005, 26(6): 964-967.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
No Suggested Reading articles found!