Research on collaborative control technology of “unloading and support balance” for surrounding rock of isolated roadway under the influence of dynamic pressure
-
摘要:
煤矿深部工作面回采过程中，经常受到强开采动压作用影响，矿压显现强烈，巷道围岩变形破坏程度大，尤其对于孤岛工作面，动压影响更加显著，围岩控制难度成倍增加。为了解决深部孤岛工作面强动压影响回采巷道围岩控制问题，以2308工作面为研究背景，采用理论分析、数值模拟、现场验证等方法，首先对巷道围岩结构模型进行分析，确定影响工作面围岩稳定的主要因素；进一步对煤柱宽度和钻孔卸压2种方案进行研究，并根据巷道围岩的实际变形情况，确定巷道围岩的非对称支护参数，实现受强动压影响回采巷道的“卸-支平衡”协同控制方案。经过现场实践验证，2308工作面巷道顶底板移近量为260 mm，两帮移近量为471 mm，巷道围岩的整体性得到增强，变形得到有效控制；采用“卸-支平衡”方案对受动压影响巷道围岩的控制效果显著。
Abstract:During the mining process of deep coal mining faces, they are often affected by strong mining dynamic pressure, resulting in strong mining pressure and significant deformation and damage of the surrounding rock of the roadway. Especially for isolated working faces, the dynamic pressure effect is more significant, and the difficulty of controlling the surrounding rock increases exponentially. In order to solve the problem of the influence of strong dynamic pressure on the control of surrounding rock in mining tunnels in deep isolated working faces, this paper takes 2308 working face as the research background and uses methods such as theoretical analysis, numerical simulation, and on-site verification. Firstly, the structural model of the surrounding rock in the tunnel is analyzed to determine the main factors affecting the stability of the surrounding rock in the working face. Further research will be conducted on the two options of coal pillar width and drilling pressure relief, and based on the actual deformation of the tunnel surrounding rock, the asymmetric support parameters of the tunnel surrounding rock will be determined to achieve a “unloading and support balance” collaborative control plan for the mining tunnel affected by strong dynamic pressure. After on-site practice verification, the displacement of the roof and floor of the 2308 working face roadway is 260 mm, and the displacement of the two sides is 471 mm. The integrity of the surrounding rock of the roadway is enhanced, and deformation is effectively controlled. The use of “unloading and support balance” has a significant control effect on the surrounding rock of tunnels affected by dynamic pressure.
-
-
![]()
图 1 2308工作面回采巷道原始支护方案
Figure 1. Original support plan for mining roadway in 2308 working face
![]()
图 2 2308工作面巷道围岩结构模型
Figure 2. Structural model of surrounding rock in roadway of 2308 working face
![]()
图 3 掘巷前后2308工作面支承应力分布曲线
Figure 3. Support stress distribution curves of 2308 working face before and after excavation
![]()
图 4 掘巷期间不同宽度煤柱应力分布曲线
Figure 4. Stress distribution curves of coal pillars with different widths during tunnel excavation
![]()
图 5 掘巷期间不同宽度煤柱位移曲线
Figure 5. Displacement curves of coal pillars with different widths during tunnel excavation
![]()
图 6 回采期间不同宽度煤柱应力分布曲线
Figure 6. Stress distribution curves of coal pillars with different widths during mining
![]()
图 7 回采期间不同宽度煤柱位移曲线
Figure 7. Displacement curves of coal pillars with different widths during mining
![]()
图 8 不同浅部钻孔直径条件实体煤侧应力分布曲线
Figure 8. Stress distribution curves of solid coal side under different shallow drilling diameter conditions
![]()
图 9 不同深部钻孔直径条件实体煤侧应力分布曲线
Figure 9. Stress distribution curves of solid coal under different deep drilling diameter conditions
![]()
图 10 不同变径位置条件实体煤侧应力分布曲线
Figure 10. Stress distribution curves on the side of solid coal under different variable diameter position conditions
表 1 巷道围岩性质
Table 1 Properties of surrounding rock in tunnels
岩石
名称厚度
/m岩性描述 粉砂岩 10.35 灰色，致密、性脆，水平或波状层理发育 砂质泥岩 2.63 深灰色，性脆，水平层理，含植物根茎化石 煤 5.37 黑色，玻璃光泽，硬度中等，含黄铁矿结核，
局部含泥质夹矸泥岩 1.33 灰黑色，较致密，裂隙较发育，填充方解石 细砂岩 3.61 灰白色，以石英为主，波状层理，致密坚硬 
下载: 导出CSV
表 2 煤岩试件力学参数统计表
Table 2 Statistical table of mechanical parameters of coal and rock specimens
岩性 体积模量/
GPa剪切模量/
GPa抗拉强度/
MPa黏聚力/
MPa内摩擦角/
（°）粉砂岩 10.37 10.48 3.20 8.10 34 细砂岩 7.25 7.43 2.90 8.70 32 中砂岩 8.86 8.67 2.63 5.58 31 砂质泥岩 4.58 4.18 2.16 3.96 29 泥岩 4.24 5.13 1.38 3.69 28 煤 2.60 2.50 1.20 3.20 27
下载: 导出CSV
-
[1] 宋彦琦,杨敏健,马宏发,等. 基于薄板理论的孤岛工作面基本顶变形规律及破断距研究[J]. 煤矿安全,2022,53(7):201−207. SONG Yanqi, YANG Minjian, MA Hongfa, et al. Study on deformation law and breaking span of main roof of isolated working face based on thin plate theory[J]. Safety in Coal Mines, 2022, 53(7): 201−207.
[2] 王庆雄. 孤岛工作面柔模混凝土沿空掘巷围岩协同控制技术[J]. 煤炭工程,2022,54(11):7−12. WANG Qingxiong. Collaborative control technology for surrounding rock of flexible formwork concrete fully gob-side entry driving in island working face[J]. Coal Engineering, 2022, 54(11): 7−12.
[3] 张杰,白文勇,王斌,等. 浅埋煤层孤岛工作面区段煤柱宽度优化[J]. 西安科技大学学报,2021,41(6):988−996. ZHANG Jie, BAI Wenyong, WANG Bin, et al. Width optimization of section coal pillar in the island working face of shallow coal seam[J]. Journal of Xi’an University of Science and Technology, 2021, 41(6): 988−996.
[4] 王正义,何江,杨文连,等. 大倾角煤层孤岛工作面采动应力演化规律研究[J]. 矿业安全与环保,2021,48(5):7−12. WANG Zhengyi, HE Jiang, YANG Wenlian, et al. Study on evolution law of mining strin isolated working face of large a dip angle coal seam[J]. Mining Safety & Environmental Protection, 2021, 48(5): 7−12.
[5] 刘鑫. 孤岛工作面水侵沿空巷道围岩稳控技术研究[J]. 工矿自化,2021,47(9):118−125. LIU Xin. Research on stability control technology of surrounding rock along goaf roadway with water intrusion in isolated island working face[J]. Industry and Mine Automation, 2021, 47(9): 118−125.
[6] 周贤,马建,辛崇伟,等. 孤岛工作面巷道围岩变形特征及修复加固技术研究[J]. 煤炭工程,2022,54(9):35−40. ZHOU Xian, MA Jian, XIN Chongwei, et al. Deformation characteristics of surrounding rock in isolated working face and its repair and reinforcement technology[J]. Coal Engineering, 2022, 54(9): 35−40.
[7] 郭靖,文明,尉永邦,等. 坚硬顶板孤岛工作面巷道矿压显现机理及卸压孔技术实践[J]. 煤炭技术,2022,41(8):15−19. GUO Jing, WEN Ming, WEI Yongbang, et al. Study on mechanism of ore pressure and technical parameters of pressure relief hole in isolated working face with thick hard roof[J]. Coal Technology, 2022, 41(8): 15−19.
[8] 陈可夯,王朋飞,翟黎伟. 特厚煤层孤岛工作面全煤巷道锚索支护技术研究与应用[J]. 煤矿安全,2021,52(12):106−114. CHEN Kehang, WANG Pengfei, ZHAI Liwei. Research and application of anchor cable support technology for whole coal roadway in isolated working face of extra-thick coal seam[J]. Safety in Coal Mines, 2021, 52(12): 106−114.
[9] 冯英华,刘增辉,李英明,等. 孤岛工作面围岩支承压力分析与沿空掘巷支护参数优化[J]. 长春工业大学学报,2021,42(6):500−509. FENG Yinghua, LIU Zenghui, LI Yingming, et al. Analysis of supporting pressure of surrounding rock in island mining face and optimization of supporting parameters of gob-side entry driving[J]. Journal of Changchun University of Technology, 2021, 42(6): 500−509.
[10] 王苏健,金声尧. 类孤岛工作面复采方案优选分析研究[J]. 煤炭科学技术,2021,49(9):9−16. WANG Sujian, JIN Shengyao. Analysis study on selective preference of recovery mining project for island-like working face[J]. Coal Science and Technology, 2021, 49(9): 9−16.
[11] 刘金海,黄涛,王悦平,等. 孤岛工作面防冲安全开采论证方法研究与应用[J]. 煤炭科学技术,2021,49(6):88−93. LIU Jinhai, HUANG Tao, WANG Yueping, et al. Study and application of demonstration method for safe mining of island coal panel based on prevention of rock burst[J]. Coal Science and Technology, 2021, 49(6): 88−93.
[12] 张茂微,鲁健. 孤岛工作面过上覆采空区采场及顶板应力演化规律研究[J]. 煤炭工程,2020,52(12):108−112. ZHANG Maowei, LU Jian. Stress evolution law of stope and roof of isolated working face advancing beneath overlying goaf[J]. Coal Engineering, 2020, 52(12): 108−112.
[13] 白东东,冀兆,李鹏,等. 半孤岛工作面冲击危险综合指数法评价与防治技术[J]. 煤炭科学技术,2020,48(S2):188−193. BAI Dongdong, JI Zhao, LI Peng, et al. Evaluation and prevention technology of island risk comprehensive index method in semi island working face[J]. Coal Science and Technology, 2020, 48(S2): 188−193.
[14] 郭忠华. 孤岛工作面巷道钻孔卸压机理及关键参数确定[J]. 太原理工大学学报,2020,51(6):906−911. GUO Zhonghua. Borehole destressing mechanism and key parameters determination of roadway in isolated working face[J]. Journal of Taiyuan University of Technology, 2020, 51(6): 906−911.
[15] 任兴. 综放孤岛工作面覆岩破断规律及采场围岩控制技术研究[J]. 煤炭工程,2020,52(S1):133−138. REN Xing. Breaking law of overlying rock in fully mechanized caving island working face and control technology of surrounding rock in stope[J]. Coal Engineering, 2020, 52(S1): 133−138.
[16] 赵会波,王涛. 孤岛综放工作面三角煤失稳机理及控制技术[J]. 煤炭工程,2020,52(9):61−65. ZHAO Huibo, WANG Tao. Instability mechanism and control technology of triangle coal in isolated island fully mechanized top-coal caving face[J]. Coal Engineering, 2020, 52(9): 61−65.
[17] 李之尚,郑西贵. 孤岛工作面巷道位置选择及开挖时序研究[J]. 矿业研究与开发,2020,40(10):22−26. LI Zhishang, ZHENG Xigui. Study on timing sequence and location selection of roadway savings in island working face[J]. Mining Research and Development, 2020, 40(10): 22−26.
[18] 程利兴,姜鹏飞,杨建威,等. 深井孤岛工作面巷道围岩采动应力分区演化特征[J]. 岩土力学,2020,41(12):4078−4086. CHENG Lixing, JIANG Pengfei, YANG Jianfei, et al. Evolution characteristics of mining-induced stress partition of roadway surrounding rock on working face of deep island[J]. Rock and Soil Mechanics, 2020, 41(12): 4078−4086.
[19] 白璐,詹小凡,邵良杉. 孤岛工作面强烈动压巷道变形控制[J]. 辽宁工程技术大学学报(自然科学版),2020,39(2):107−112. BAI Lu, ZHAN Xiaofan, SHAO Liangshan. Deformation control of strong dynamic pressure roadway in island working face[J]. Journal of Liaoning Technical University (Natural Science), 2020, 39(2): 107−112.
[20] 杨小军,李世和,陈建伟. 高瓦斯矿井孤岛工作面沿空掘巷煤柱宽度研究[J]. 煤矿安全,2019,50(10):193−197. YANG Xiaojun, LI Shihe, CHEN Jianwei. Width of coal pillar of gob-side entry driving in island working face of high gas mine[J]. Safety in Coal Mines, 2019, 50(10): 193−197.
[21] 续晋红,张泽飞,王涛. 孤岛工作面沿空掘巷高强稳定型支护技术研究[J]. 煤炭工程,2019,51(S1):27−31. XU Jinhong, ZHANG Zefei, WANG Tao. Study on high-strength and stable supporting technology of gob-side driving roadway in island working face[J]. Coal Engineering, 2019, 51(S1): 27−31.
[22] 任力. 综采孤岛工作面巷道维护技术研究与实践[J]. 煤炭工程,2019,51(S1):52−55. REN Li. Research and practice of roadway maintenance technology in fully mechanized island face[J]. Coal Engineering, 2019, 51(S1): 52−55.
[23] 陈威. 孤岛工作面回风巷顶板支护研究[J]. 煤炭工程,2019,51(S1):101−105. CHEN Wei. Roof support design of air return way in island working face[J]. Coal Engineering, 2019, 51(S1): 101−105.
[24] 任梦莉,蔡峰,梅胜凯. 深部“三面”孤岛工作面采动覆岩变形特征研究[J]. 工矿自动化,2019,45(10):43−48. REN Mengli, CAI Feng, MEI Shengkai. Research on deformation characteristics of mining over burden rocks and eep “three sided” island working face[J]. Industry and Mine Automation, 2019, 45(10): 43−48.
[25] 肖家平,韩磊. 缓倾斜煤层孤岛工作面巷道底鼓机制及控制[J]. 防灾减灾工程学报,2019,39(2):323−329. XIAO Jiaping, HAN Lei. Mechanism and control technology of the gateway floor heave at island face of gently inclined coal seam[J]. Journal of Disaster Prevention and Mitigation Engineering, 2019, 39(2): 323−329.
-
期刊类型引用(5)
1. 张学鹏. 采煤工作面动压影响巷道水力压裂切顶卸压技术研究. 能源与节能. 2025(01): 146-148 . 
百度学术
2. 夏磊，强伟，徐雷，徐国尧. 孤岛工作面微震异常区冲击危险震动波反演与防治. 煤矿现代化. 2024(05): 148-152 . 百度学术
3. 何明伟. 浅埋深采空区下孤岛工作面区段煤柱稳定性研究. 中国煤炭. 2024(S1): 275-283 . 百度学术
4. 杜才溢，张鹏. 煤矿巷道锚网索支护优化及应用. 内蒙古煤炭经济. 2024(22): 118-120 . 百度学术
5. 王虹玉，程志恒，王朋，陈亮，曲晓明，郭凯. 孤岛工作面覆岩结构演化及区段煤柱稳定性. 中国安全科学学报. 2024(11): 108-118 . 百度学术
其他类型引用(0)
计量
- 文章访问数: 26
- HTML全文浏览量: 2
- PDF下载量: 7
- 被引次数: 5
