岩土力学 ›› 2023, Vol. 44 ›› Issue (1): 289-302.doi: 10.16285/j.rsm.2022.0236

• 岩土工程研究 • 上一篇    下一篇

巷旁切顶对采场下位岩层垮落特征的影响机制

刘斌慧1, 2,杨军1,田锋2,付强1   

  1. 1. 中国矿业大学(北京) 深部岩土力学与地下工程国家重点实验室,北京 100083;2. 东北大学 资源与土木工程学院,辽宁 沈阳 110819
  • 收稿日期:2022-03-02 接受日期:2022-06-01 出版日期:2023-01-16 发布日期:2023-01-13
  • 作者简介:刘斌慧,男,1993年生,博士研究生,主要从事无煤柱自成巷等方面的研究。
  • 基金资助:
    国家自然科学基金资助项目(No. 52074298)

Influence mechanism of roadside roof cutting on collapse characteristics of lower roof in a stope

LIU Bin-hui1, 2, YANG Jun1, TIAN Feng2, FU Qiang1   

  1. 1. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing), Beijing 100083, China; 2. College of Resources and Civil Engineering, Northeastern University, Shenyang, Liaoning 110819, China
  • Received:2022-03-02 Accepted:2022-06-01 Online:2023-01-16 Published:2023-01-13
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (52074298).

摘要: 巷旁切顶打断了巷道与采场下位顶板的连续性,促进了采场顶板垮落形成碎石帮,深入研究切顶对采场下位岩层垮落特征的影响机制具有重要意义。对采场支架载荷进行了分析,并对上覆岩层建立了力学建模,明确了上覆岩层运动与典型位置采场支架载荷特征的关系。在此基础上,针对6个巷旁切顶的工作面,给出了典型位置支架的载荷数据,从而分析得到巷旁切顶对采场下位岩层垮落特征的影响机制。同时,建立了数值模型,分析了不同的切顶起始位置和下位顶板强度对下位岩层垮落特征的影响。结果表明,121工法的“垮落线”具有对称的弧形边界,110工法的“垮落线”在切顶侧向工作面充分移动,N00工法介于上述两者之间。此外,不同切顶起始位置和顶板强度条件下,切顶的作用效果存在差异。研究结果有利于进一步深化巷旁切顶对采场下位岩层垮落特征影响的认识。

关键词: 切顶卸压自成巷, 巷旁切顶, 下位顶板, 3DEC软件

Abstract: The roadside roof cutting interrupts the continuity between the roadway and the lower roof, promoting the collapse of the lower roof to form a gravel gang. It is of great significance to study the influence mechanism of roof cutting on the caving characteristics of lower stope strata. In this paper, the stope support load was analyzed, the mechanical modeling of the overlying strata was carried out, and the relationship between the movement of the overlying strata and the stope support load characteristics at typical positions was clarified. On this basis, the load data of supports at typical positions were given for six working faces with roadway side roof cutting, so as to analyze the influence mechanism of the roadside roof cutting on the collapse characteristics of the lower strata in the stope. Meanwhile, a numerical model was established, taking into account the different starting positions of roof cutting and the strength of the lower roof, and further analyzed the effect of roadside roof cutting on the collapse of the lower strata. The results show that the "caving line" of the 121 method has a symmetrical arc boundary, the "caving line" of the 110 method is entirely moved to the working face on the roof cutting side, and the N00 method is between the above two. In addition, there are differences in the effect of roof cutting under different roof cutting starting positions and roof strength conditions. The research results are conducive to further deepening the understanding of the effect of roadside roof cutting on the caving characteristics of the lower stope strata.

Key words: gob-side entry retaining automatically formed by roof cutting and pressure release, roadside roof cutting, lower roof, 3DEC soft

中图分类号: 

  • TD 325
[1] 何文, 陈豪, 郑场松, 卢博凯, 王慢慢, . 尾矿渗透破坏及其导波监测试验研究[J]. 岩土力学, 2023, 44(2): 415-424.
[2] 王磊, 陈礼鹏, 刘怀谦, 朱传奇, 李少波, 范浩, 张帅, 王安铖, . 不同初始瓦斯压力下煤体动力学特性及其劣化特征[J]. 岩土力学, 2023, 44(1): 144-158.
[3] 池小楼, 杨科, 刘文杰, 付强, 魏祯, . 大倾角煤层分层综采再生顶板破断规律研究[J]. 岩土力学, 2022, 43(5): 1391-1400.
[4] 王爱文, 高乾书, 潘一山, . 煤层钻孔降倾-控变-耗能防冲机制试验研究[J]. 岩土力学, 2021, 42(5): 1230-1244.
[5] 陈晓斌, 喻昭晟, 光, 张家生, 董亮, . 重载铁路基床表层级配碎石填料组构 系数应用与分析[J]. 岩土力学, 2020, 41(9): 3031-3040.
[6] 王刚, 秦相杰, 江成浩, 张振宇. 温度作用下CT三维重建煤体微观 结构的渗流和变形模拟[J]. 岩土力学, 2020, 41(5): 1750-1760.
[7] 刘一扬, 宋选民, 朱德福, 李竹. 大块度关键块动态结构力学行为及响应特征研究[J]. 岩土力学, 2020, 41(3): 1019-1028.
[8] 鲁海峰, 孟祥帅, 颜伟, 姚多喜, . 采煤工作面层状结构底板采动稳定及 破坏深度的圆弧滑动解[J]. 岩土力学, 2020, 41(1): 166-174.
[9] 李世俊, 马昌慧, 刘应明, 韩玉珍, 张 彬, 张 嘎, . 离心模型试验与数值模拟相结合研究 采空边坡渐进破坏特性[J]. 岩土力学, 2019, 40(4): 1577-1583.
[10] 许 江,苏小鹏,彭守建,刘义鑫,冯 丹,刘龙荣, . 卸压区不同钻孔长度抽采条件下瓦斯运移特性试验[J]. , 2018, 39(1): 103-111.
[11] 汪北方,梁 冰,孙可明,武占超,孙维吉,姜利国,王俊光,. 典型浅埋煤层长壁开采覆岩采动响应与控制研究[J]. , 2017, 38(9): 2693-2700.
[12] 孟庆彬,韩立军,张帆舸,张 建,聂军委,文圣勇,. 深部高应力软岩巷道耦合支护效应研究及应用[J]. , 2017, 38(5): 1424-1435.
[13] 唐礼忠,翦英骅,李地元,王 春,邓丽凡,陈 源. 基于微震矩张量的矿山围岩破坏机制分析[J]. , 2017, 38(5): 1436-1444.
[14] 何 团,毛德兵,黄志增,孙晓冬,张学亮, . 特厚煤层区段防水煤柱稳定性评价及保护技术研究[J]. , 2017, 38(4): 1148-1153.
[15] 孙 闯,徐乃忠,刘义新,刘 贵,高 超, . 基于双因素时间函数的松散地层条件下地表点动态沉降预计[J]. , 2017, 38(3): 821-826.
Viewed
Full text


Abstract

Cited

  Shared   
  Discussed   
[1] 夏栋舟,何益斌,刘建华. 刚性桩复合地基-上部结构动力相互作用体系抗震性能及影响因素分析[J]. , 2009, 30(11): 3505 -3511 .
[2] 甄文战,孙德安,段 博. 不同应力路径下超固结黏土试样变形局部化分析[J]. , 2011, 32(1): 293 -298 .
[3] 邬 凯,盛 谦,梅松华,李 佳. PSO-LSSVM模型在位移反分析中的应用[J]. , 2009, 30(4): 1109 -1114 .
[4] 刘 镇,周翠英,朱凤贤,张 磊. 软岩饱水软化过程微观结构演化的临界判据[J]. , 2011, 32(3): 661 -666 .
[5] 罗耀武,胡 琦,凌道盛,陈 峥,陈云敏. 桩-土界面特性对砂土地基中抗拔桩承载特性影响的模型试验研究[J]. , 2011, 32(3): 722 -726 .
[6] 孙 冰,曾 晟,丁德馨,綦春明,喻 清. 低应变动测桩及锚杆中波的传播规律差异研究[J]. , 2011, 32(4): 1143 -1148 .
[7] 陈振华 ,李玲玲 ,王立忠 ,许 沿 ,杨 艺. 海堤加筋的分析测试与材料选用[J]. , 2011, 32(6): 1824 -1830 .
[8] 严耿升,张虎元,王晓东,杨 博,李 敏. 干旱区土建筑遗址冻融耐久性研究[J]. , 2011, 32(8): 2267 -2273 .
[9] 张 波 ,李术才 ,张敦福 ,李明田 ,邵冬亮. 简谐波在黏弹性介质中波动传播的应力场研究[J]. , 2011, 32(8): 2429 -2434 .
[10] 郭小红 ,陈飞飞 ,褚以惇 ,乔春江. 富水软弱带公路隧道支护技术研究[J]. , 2011, 32(S2): 449 -454 .