乌兰木伦煤矿大断面硐室围岩变形破坏规律及控制

陈蓥; 杨宏涛; 史明哲; 鲍世纪; 张子凯; 孔德瑞

doi:10.13272/j.issn.1671-251x.2024060090

乌兰木伦煤矿大断面硐室围岩变形破坏规律及控制

doi: 10.13272/j.issn.1671-251x.2024060090

辽宁工程技术大学矿业学院，辽宁阜新　123000

基金项目: 国家自然科学基金面上项目（51874164）。

详细信息

作者简介:
陈蓥（1982—），男，辽宁阜新人，教授，博士，研究方向为矿山压力与岩层控制，E-mail：chenying@lntu.edu.cn

中图分类号: TD325
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出版历程
- 收稿日期: 2024-06-27
- 修回日期: 2024-08-30
- 网络出版日期: 2024-08-16

Deformation and failure law and control of surrounding rock in the large section chamber of Ulan Mulun Coal Mine

College of Mining, Liaoning Technical University, Fuxin 123000, China

摘要

摘要: 针对煤矿井下巷道大断面硐室的围岩变形破坏问题，以乌兰木伦煤矿井下分选及充填大断面硐室为研究对象，采用相似模拟实验方法，进行单调递增加载和恒定荷载加载单轴压缩实验，对大断面硐室围岩变形破坏规律进行了研究。结果表明：① 2种加载方式在压密阶段、弹性变形阶段及微破裂稳定发展阶段破坏演化和变形位移趋势相似。② 采用单调递增加载方式的试样裂纹较少但裂纹缝隙较大，试样沿着主裂纹突然发生破断，期间有大量碎屑飞出，试样变形位置主要集中在围岩边界，破坏时释放能量较多，但峰后释放能量持续时间较短。③ 采用恒定荷载加载方式的试样应力保持不变，应变缓慢增加，期间产生大量微小裂纹，试样变形位置主要围绕在硐室周围，破坏时释放能量较少，但峰后释放能量持续时间较长。依据大断面硐室围岩变形破坏规律，提出了锚杆索支护方案：硐室顶部打长锚索，将顶板和上方坚硬岩石连成整体；在硐室煤岩交界处打倾斜锚杆，将煤岩交界面与周围岩体紧密连接。数值模拟结果表明，支护后围岩应力、位移、塑性区均明显减小，围岩稳定性大幅提高，支护效果良好。
- 大断面硐室 /
- 围岩变形破坏 /
- 单轴压缩实验 /
- 声发射 /
- 锚杆索支护
Abstract: In response to the deformation and failure of surrounding rock in large section chamber underground roadways of coal mines, this study focuses on the sorting and filling of large section chamber underground roadways in Ulan Mulun coal mine. Similar simulation experiments are conducted using monotonically increasing and constant load uniaxial compression methods to investigate the deformation and failure laws of surrounding rock in large section chamber underground roadways. The results show the following points. ① The failure evolution and deformation displacement trends of the two loading methods are similar in the compaction stage, elastic deformation stage, and micro fracture stable development stage. ② The sample using monotonically increasing loading method has fewer cracks but larger crack gaps. The sample suddenly breaks along the main crack, during which a large amount of debris flies out. The deformation of the sample is mainly concentrated at the boundary of the surrounding rock. More energy is released during the failure, but the duration of energy release after the peak is relatively short. ③ The stress of the specimen loaded with a constant load remains constant, and the strain slowly increases, during which a large number of small cracks are generated. The deformation position of the specimen mainly surrounds the chamber, and the energy released during failure is relatively small, but the duration of energy release after the peak is longer. Based on the deformation and failure law of the surrounding rock of the large section chamber, a bolt and cable support scheme is proposed. A long anchor cable is installed at the top of the chamber to connect the roof and the hard rock above it as a whole. The inclined anchor rods are installed at the coal rock interface of the roadway to tightly connect the coal rock interface with the surrounding rock mass. The numerical simulation results show that after support, the stress, displacement, and plastic zone of the surrounding rock are significantly reduced, the stability of the surrounding rock is greatly improved, and the support effect is good.
- large cross-section chamber /
- surrounding rock deformation and failure /
- uniaxial compression experiment /
- acoustic emission /
- anchor cable support

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图 1 岩层柱状图

Figure 1. Rock column histogram

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图 2 巷道硐室断面

Figure 2. Section of roadway chamber

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图 3 大断面硐室相似模拟模型

Figure 3. Similar simulation model of large section chamber

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图 4 不同加载方式下试样破坏演化过程

Figure 4. Failure evolution process of samples under different loading modes

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图 5 破裂前阶段试样变形位移云图

Figure 5. Deformation and displacement nephogram of sample before crack stage

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图 6 不同加载方式下破裂阶段试样变形位移云图

Figure 6. Deformation and displacement nephogram of sample at crack stage under different loading modes

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图 7 不同加载过程中试样声发射能量特征

Figure 7. Acoustic emission energy features of samples under different loading processes

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图 8 大断面硐室锚杆索支护方案

Figure 8. Anchor bolt and anchor cable support scheme for large section chamber

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图 9 大断面硐室数值模型

Figure 9. Numerical model of large section chamber

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图 10 支护前后围岩应力场分布规律

Figure 10. Distribution law of stress field of surrounding rock before and after support

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图 11 支护前后围岩位移场分布规律

Figure 11. Distribution law of displacement field of surrounding rock before and after support

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图 12 支护前后围岩塑性区分布规律

Figure 12. Distribution law of plastic zone of surrounding rock before and after support

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表 1 相似材料配比

Table 1. Similar material ratio

岩性	厚度/m	相似材料质量配比（水泥∶砂子∶水）	目标单轴抗压强度/MPa	实际单轴抗压强度/MPa
顶板砂质泥岩	16.00	3∶1∶1.5	18	17.42
3−1煤层	4.00	2∶1.2∶1	14	14.49
底板砂质泥岩	5.00	3∶1∶1	25	25.25

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表 2 煤岩体物理力学参数

Table 2. Physical and mechanical parameters of coal and rock mass

岩性	密度/ （kg·m⁻³）	弹性模量/GPa	体积模量/GPa	剪切模量/GPa	泊松比	黏聚力 /MPa	内摩擦角/（°）	抗拉强度/MPa
顶板砂质泥岩	2 282	7.97	3.41	3.27	0.11	3.58	32.66	0.71
3−1煤	1 268	4.67	5.99	1.34	0.37	1.98	44.31	0.41
底板砂质泥岩	2 363	8.35	3.66	3.37	0.12	3.63	41.02	0.84

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表 3 锚杆索参数

Table 3. Parameters of anchor bolt and anchor cable

结构单元	弹性模量/GPa	直径/ mm	抗拉强度/MPa	水泥浆刚度/（N·m⁻¹）	水泥浆粘结力/N	密度/ （kg·m⁻³）
锚杆	200	22.0	455	0.9×10¹⁰	1.0×10⁵	7 800
锚索	300	21.4	490	0.9×10¹⁰	1.0×10⁵	7 850

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参考文献(21)

[1]	谢和平. 深部岩体力学与开采理论研究进展[J]. 煤炭学报,2019,44(5):1283-1305. XIE Heping. Research review of the state key research development program of China:deep rock mechanics and mining theory[J]. Journal of China Coal Society,2019,44(5):1283-1305.
[2]	张吉雄,屠世浩,曹亦俊,等. 深部煤矿井下智能化分选及就地充填技术研究进展[J]. 采矿与安全工程学报,2020,37(1):1-10,22. ZHANG Jixiong,TU Shihao,CAO Yijun,et al. Research progress of technologies for intelligent separation and in-situ backfill in deep coal mines in China[J]. Journal of Mining & Safety Engineering,2020,37(1):1-10,22.
[3]	张吉雄,张强,巨峰,等. 煤矿“采选充+X”绿色化开采技术体系与工程实践[J]. 煤炭学报,2019,44(1):64-73. ZHANG Jixiong,ZHANG Qiang,JU Feng,et al. Practice and technique of green mining with integration of mining,dressing,backfilling and X in coal resources[J]. Journal of China Coal Society,2019,44(1):64-73.
[4]	刘学生,王新,谭云亮,等. 深部超大断面分选硐室群布置方式优化研究[J]. 煤炭科学技术,2022,50(8):32-39. LIU Xuesheng,WANG Xin,TAN Yunliang,et al. Study on layout optimization of deep super-large section sorting chamber group[J]. Coal Science and Technology,2022,50(8):32-39.
[5]	刘学生,范德源,谭云亮,等. 深部动载作用下超大断面硐室群锚固围岩破坏失稳机制研究[J]. 岩土力学,2021,42(12):3407-3418. LIU Xuesheng,FAN Deyuan,TAN Yunliang,et al. Failure and instability mechanism of anchored surrounding rock for deep chamber group with super-large section under dynamic disturbances[J]. Rock and Soil Mechanics,2021,42(12):3407-3418.
[6]	周煜. 动载扰动下深部大断面硐室围岩稳定控制研究[D]. 徐州:中国矿业大学,2023. ZHOU Yu. Study on stability control of surrounding rock of deep large section chamber under dynamic load disturbance[D]. Xuzhou:China University of Mining and Technology,2023.
[7]	杨书浩,王俊,宁建国,等. 动载扰动下深部大断面硐室围岩“帮−顶”联动失稳机理[J]. 煤炭科学技术,2021,49(10):23-33. YANG Shuhao,WANG Jun,NING Jianguo,et al. Mechanism of connected instability of "rib-roof" in deep large section chamber under dynamic disturbance[J]. Coal Science and Technology,2021,49(10):23-33.
[8]	宋楷晨. 基于时效特性深埋大断面硐室群围岩稳定控制技术研究[D]. 徐州:中国矿业大学,2023. SONG Kaichen. Study on stability control technology of surrounding rock of deep-buried large-section chamber group based on time-effect characteristics[D]. Xuzhou:China University of Mining and Technology,2023.
[9]	刘力源,张乐,纪洪广. 深部地下硐室与应力场轴变关系及其围岩损伤破裂分析[J]. 工程科学学报,2022,44(4):516-525. LIU Liyuan,ZHANG Le,JI Hongguang. Mechanism analysis of rock damage and failure based on the relation between deep chamber axial variation and in situ stress fields[J]. Chinese Journal of Engineering,2022,44(4):516-525.
[10]	杨计先. 井底巷道硐室群破坏机理及综合加固技术研究[J]. 煤炭科学技术,2019,47(4):69-77. YANG Jixian. Study on failure mechanism and comprehensive strengthening technology of roadways and chambers group at shaft bottom[J]. Coal Science and Technology,2019,47(4):69-77.
[11]	王琦,张皓杰,江贝,等. 深部大断面硐室破坏机制与锚注控制方法研究[J]. 采矿与安全工程学报,2020,37(6):1094-1103. WANG Qi,ZHANG Haojie,JIANG Bei,et al. Failure mechanism of deep large section chamber and anchor injection control method[J]. Journal of Mining & Safety Engineering,2020,37(6):1094-1103.
[12]	柴敬,刘泓瑞,张丁丁,等. 覆岩载荷扰动下平硐围岩变形分析及支护优化[J]. 工矿自动化,2023,49(3):13-22. CHAI Jing,LIU Hongrui,ZHANG Dingding,et al. Deformation analysis and support optimization of adit surrounding rock under overburden load disturbance[J]. Journal of Mine Automation,2023,49(3):13-22.
[13]	宋高峰,黄鹏,李鹤鹤,等. 基于能量法的工作面端面冒顶机理及“支架−围岩”耦合关系试验研究[J]. 煤炭科学技术,2024,52(7):11-22. SONG Gaofeng,HUANG Peng,LI Hehe,et al. Failure mechanism of tip-to-face roof based on energy method and experimental investigation of support-strata interaction[J]. Coal Science and Technology,2024,52(7):11-22.
[14]	周俊,赵光明,孟祥瑞,等. 岩体模型双向加载巷道开挖卸荷效应[J]. 煤炭学报,2023,48(9):3384-3392. ZHOU Jun,ZHAO Guangming,MENG Xiangrui,et al. Unloading effect of roadway excavation based on simulation method in similar material[J]. Journal of China Coal Society,2023,48(9):3384-3392.
[15]	赵国贞,程伟,刘超,等. 基于循环加卸载的煤岩体破坏力学行为和能量演化规律研究[J]. 岩石力学与工程学报,2024,43(7):1636-1645. ZHAO Guozhen,CHENG Wei,LIU Chao. Failure mechanical behavior and energy evolution of coal and rock under cyclic loading and unloading[J]. Chinese Journal of Rock Mechanics and Engineering,2024,43(7):1636-1645.
[16]	涂敏,赵庆冲,张向阳,等. 不同加载速率下煤岩动力破坏特征实验研究[J]. 采矿与安全工程学报,2023,40(5):1031-1042. TU Min,ZHAO Qingchong,ZHANG Xiangyang. Experimental study on dynamic failure characteristics of coal and rock under different loading rates[J]. Journal of Mining & Safety Engineering,2023,40(5):1031-1042.
[17]	李明,浦海,陈彦龙,等. 压剪复合载荷下煤岩蠕变力学特性及声发射特征[J]. 采矿与安全工程学报,2024,41(4):801-812. LI Ming,PU Hai,CHEN Yanlong,et al. Creep mechanical properties and acoustic emission characteristics of coal and rock under compressive shear combined load[J]. Journal of Mining & Safety Engineering,2024,41(4):801-812.
[18]	胡千庭,刘荣辉,李全贵,等. 单轴压缩下典型煤岩破坏的声发射特征研究[J]. 地下空间与工程学报,2023,19(6):1769-1781. HU Qianting,LIU Ronghui,LI Quangui,et al. Acoustic emission characteristics study of typical coal and rock failure under uniaxial compression[J]. Chinese Journal of Underground Space and Engineering,2023,19(6):1769-1781.
[19]	冯国瑞,文晓泽,郭军,等. 含水率对煤样声发射特征和碎块分布特征影响的试验研究[J]. 中南大学学报(自然科学版),2021,52(8):2910-2918. FENG Guorui,WEN Xiaoze,GUO Jun,et al. Study on influence of moisture content on coal sample AE properties and fragment distribution characteristics[J]. Journal of Central South University (Science and Technology),2021,52(8):2910-2918.
[20]	陈梁,孟庆彬,戚振豪,等. 深部厚煤层采动巷道失稳特征及锚网索注梯级支护技术[J]. 采矿与安全工程学报,2024,41(3):533-548. CHEN Liang,MENG Qingbin,QI Zhenhao,et al. Instability features of mining roadway in deep-thick coal seam and progressive bolt-mesh-cable-grouting support technology[J]. Journal of Mining & Safety Engineering,2024,41(3):533-548.
[21]	司林坡,王晓卿. 基于数值模拟的煤矿井下超大断面硐室支护优化[J]. 煤炭科学技术,2022,50(3):61-68. SI Linpo,WANG Xiaoqing. Support optimization of ultra-large cross-section chamber in underground coal mine based on numerical simulation[J]. Coal Science and Technology,2022,50(3):61-68.