| Citation: |
LI Zhenhua, REN Ziyuan, DU Feng, REN Hao, WANG Wenqiang. Mine pressure law and control technology of main roadway coal pillar working face passing through empty roadway[J]. COAL GEOLOGY & EXPLORATION.
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Due to the adjustment of the layout of the mine working face, the coal pillar working face often faces the situation that the overburden roof is difficult to control when passing through the abandoned roadway. In order to solve this problem, taking the outer coal pillar working face of the second panel of Zhaogu No.2 Coal Mine in Henan Province as the engineering background, theoretical analysis, numerical simulation and field test are used to study the fracture combination structure of the working face and the overlying strata of the empty roadway, simulate the full-cycle evolution law of roof stress-displacement under different support strength, analyze the characteristics of mine pressure in the working face, and put forward the corresponding control technology. The results show that the different fracture forms of the main roof have a significant impact on the characteristics of mine pressure behavior. The fracture positions of the key blocks can be divided into three types : above the coal pillar, above the empty roadway and above the solid coal. By establishing the mechanical model of the working face passing through the empty roadway, the mechanical mechanism of the advanced breaking of the basic roof is studied. The basic roof is supported by the empty roadway-coal pillar-working face support system, forming a stable bearing structure of ' masonry beam '. The critical value of the support strength of the basic roof sliding instability space-time roadway is 4.6 MPa. The numerical simulation shows that the superposition effect caused by the advanced support stress of the working face and the stress concentration of the empty roadway has a significant influence on the coal pillar. When the working face is advanced to 5 m from the empty roadway, the coal pillar is unstable and the basic roof is prone to advanced breaking. In the process of working face passing through empty roadway, the distribution characteristics of advance support stress of coal pillar change from ' bimodal type ' to ' isolated peak type '. There are obvious differences in the distribution characteristics of roof stress under different support strength. It is determined that the support strength of the empty roadway is 4.5 MPa, which can prevent the basic roof from breaking in advance. Finally, the ' anchor net cable ' support method is used to reinforce the roof of the empty roadway in the outer coal pillar working face of the second panel. The working resistance of the hydraulic support during the empty roadway is within the safe range of the study area, and no accidents such as roof collapse and support crushing occur. The technical problems of the empty roadway in the outer coal pillar working face of the second panel are solved, which can provide reference for similar working faces.
| [1] |
张文杰，何满潮，王炯，等. 逆断层影响下无煤柱自成巷矿压规律及围岩控制[J]. 煤田地质与勘探，2023，51(5)：1–10. ZHANG Wenjie，HE Manchao，WANG Jiong，et al. Application of pillar-free self-formed roadway technology under the influence of reserse faults：Strata behavior law and surrounding rock control[J]. Coal Geology & Exploration，2023，51(5)：1–10.
|
| [2] |
孟巧荣，王慧娴，王朋飞，等. 深埋倾斜特厚煤层窄煤柱护巷机理与围岩控制[J]. 煤炭科学技术，2024，52(3)：38–52. MENG Qiaorong，WANG Huixian，WANG Pengfei，et al. Gateroad protection mechanism and surrounding rock control for gob-side entry with slender pillar in deep and inclined extra-thick coal seams[J]. Coal Science and Technology，2024，52(3)：38–52.
|
| [3] |
彭林军，吴家遥，何满潮，等. 深部特厚煤层综放沿空掘巷煤柱优化及巷道支护[J]. 西安科技大学学报，2024，44(3)：563–574.
PENG Linjun，WU Jiayao，HE Manchao，et al. Optimization of coal pillar and tunnel support for fully mechanized caving along gob in deep and extra thick coal seams[J]. Journal of Xi’an University of Science and Technology，2024，44(3)：563–574.
|
| [4] |
刘江斌，刘晓刚，刘茂福，等. 榆神矿区多层厚硬顶板强矿压显现及覆岩破断运动规律研究[J]. 中国煤炭，2024，50(4)：46–56. LIU Jiangbin，LIU Xiaogang，LIU Maofu，et al. Study on strong mine pressure behavior and overburden fracture movement law of multi-layer thick and hard roof in Yushen mining area[J]. China Coal，2024，50(4)：46–56.
|
| [5] |
尹超宇，冯光明，高鹏，等. 工作面过空巷围岩失稳机理研究[J]. 采矿与安全工程学报，2018，35(3)：457–464. YIN Chaoyu，FENG Guangming，GAO Peng，et al. Research on instability mechanism of surrounding rock in stage of working face passing abandoned roadway[J]. Journal of Mining & Safety Engi-neering，2018，35(3)：457–464.
|
| [6] |
陈志维，张彦董. 窄煤柱沿空掘巷围岩稳定协同控制技术研究与应用[J]. 矿业安全与环保，2023，50(1)：65–70. CHEN Zhiwei，ZHANG Yandong. Research and application of coordinated control technology for surrounding rock stability of gob-side entry driving with narrow coal pillar[J]. Mining Safety & Environmental Protection，2023，50(1)：65–70.
|
| [7] |
许家林，鞠金峰. 特大采高综采面关键层结构形态及其对矿压显现的影响[J]. 岩石力学与工程学报，2011，30(8)：1547–1556. XU Jialin，JU Jinfeng. Structural morphology of key stratum and its influence on strata behaviors in fully-mechanized face with su-per-large mining height[J]. Chinese Journal of Rock Mechanics and Engineering，2011，30(8)：1547–1556.
|
| [8] |
徐青云，宁掌玄，朱润生，等. 综放工作面充填过空巷顶板失稳机理及控顶研究[J]. 采矿与安全工程学报，2019，36(3)：505–512.
XU Qingyun，NING Zhangxuan，ZHU Runsheng，et al. Study on instability mechanism and top control of overfilled roof in fully mechanized caving face[J]. Journal of Mining & Safety Engineering，2019，36(3)：505–512.
|
| [9] |
刘畅，张俊文，杨增强，等. 工作面过空巷基本顶超前破断机制及控制技术[J]. 岩土力学，2018，39(4)：1411–1421.
LIU Chang，ZHANG Junwen，YANG Zengqiang，et al. Mechanism of advance fracture of main roof and its control technology when workface crossing abandoned roadway[J]. Rock and Soil Mechanics，2018，39(4)：1411–1421.
|
| [10] |
刘畅，杨增强，弓培林，等. 工作面过空巷基本顶超前破断压架机理及控制技术研究[J]. 煤炭学报，2017，42(8)：1932–1940.
LIU Chang，YANG Zengqiang，GONG Peilin，et al. Mechanism and control technology of supports crushing induced by main roof’s breaking ahead of workface when crossing abandoned roadway[J]. Journal of China Coal Society，2017，42(8)：1932–1940.
|
| [11] |
刘畅，弓培林，王开，等. 复采工作面过空巷顶板稳定性[J]. 煤炭学报，2015，40(2)：314–322. LIU Chang，GONG Peilin，WANG Kai，et al. Roof stability for repeated mining workface passing through abandoned parallel gate-way[J]. Journal of China Coal Society，2015，40(2)：314–322.
|
| [12] |
赵文光，解振华. 基于3DEC的过空巷群采动来压突显特征模拟研究[J]. 煤炭科学技术，2022，50(增刊1)：54–58. ZHAO Wenguang，XIE Zhenhua. Simulation study on the salient characteristics of mining- induced pressure in goaf group based on 3DEC[J]. Coal Science and Technology，2022,50(Sup.1)：54–58.
|
| [13] |
谢生荣，李世俊，魏臻，等. 综放工作面过空巷时支架-围岩稳定性控制[J]. 煤炭学报，2015，40(3)：502–508. XIE Shengrong，LI Shijun，WEI Zhen，et al. Stability control of support-surrounding rock system during fully mechanized caving face crossing abandoned roadway period[J]. Journal of China Coal Society，2015，40(3)：502–508.
|
| [14] |
周海丰，黄庆享. 大采高工作面过空巷群顶板破断及矿压规律研究[J]. 煤炭科学技术，2020，48(2)：70–79. ZHOU Haifeng，HUANG Qingxiang. Study on the law of roof breakage and mine pressure passing large cross-section gob group in the fully-mechanized face with high mining height[J]. Coal Science and Technology，2020，48(2)：70–79.
|
| [15] |
高海滨，侯可可，王兆其，等. 极近距离煤层采空区下沿空留巷技术研究[J]. 中国煤炭，2024，50(4)：68–78. GAO Haibin，HOU Keke，WANG Zhaoqi，et al. Research on technology of gob-side entry retaining under goaf in extremely close distance coal seam[J]. China Coal，2024，50(4)：68–78.
|
| [16] |
王军，解振华. 浅埋工作面过空巷煤基混凝土墩柱支护研究与应用[J]. 中国煤炭，2023，49(增刊2)：226–232. WANG Jun. Research and application of coal-based concrete pier column support in shallow-buried working face[J]. China Coal，2023,49(Sup.2):226–232.
|
| [17] |
段计伟. 窄煤柱沿空掘巷非对称支护力学特征与支护参数研究[J]. 矿业安全与环保，2024，51(1)：147–153. DUAN Jiwei. Study on mechanical characteristics and supporting parameters of asymmetric support in gob-side entry driving with narrow coal pillar[J]. Mining Safety & Environmental Protection，2024，51(1)：147–153.
|
| [18] |
谢学斌，李德玄，孔令燕. 基于弹性薄板理论的矿壁稳定性分析模型及应用[J]. 采矿与安全工程学报，2020，37(4)：698–706.
XIE Xuebin，LI Dexuan，KONG Lingyan. Stability analysis model of ore wall based on elastic thin plate theory and its application[J]. Journal of Mining & Safety Engineering，2020，37(4)：698–706.
|
| [19] |
邵春瑞，李俊清，赵宝友. 综放工作面过密集空巷群高水充填技术研究及应用[J]. 煤炭工程，2022，54(6)：57–63. SHAO Chunrui，LI Junqing，ZHAO Baoyou. High water filling technology for fully mechanized top-coal caving face crossing close-set abandoned roadway groups[J]. Coal Engineering，2022，54(6)：57–63.
|
| [20] |
钱鸣高，许家林. 煤炭工业发展面临几个问题的讨论[J]. 采矿与安全工程学报，2006，23(2)：127–132.
QIAN Minggao，XU Jialin. Discussion of several issues concerning the development of coal industry in China[J]. Journal of Mining & Safety Engineering，2006，23(2)：127–132.
|
| [21] |
冯强，刘炜炜，伏圣岗，等. 基于弹性地基梁采场坚硬顶板变形与内力的解析计算[J]. 采矿与安全工程学报，2017，34(2)：342–347.
FENG Qiang，LIU Weiwei，FU Shenggang，et al. Analytical solution for deformation and internal force of hard roof in stope based on elastic foundation beam[J]. Journal of Mining & Safety Engineering，2017，34(2)：342–347.
|
| [22] |
刘雨涛，李其振，王鹏伟. 高瓦斯突出煤层原位充填沿空留巷技术研究[J]. 矿业安全与环保，2020，47(1)：45–50. LIU Yutao，LI Qizhen，WANG Pengwei. Study on gob-side entry retaining technology of in situ filling in high gassyoutburst coal seam[J]. Mining Safety & Environmental Protection，2020，47(1)：45–50.
|
| [23] |
刘迅. 沿空巷道侧采空区上方基本顶断裂位置研究[J]. 矿业安全与环保，2017，44(5)：40–44. LIU Xun. Study on fracture position of main roof above gob-side entry[J]. Mining Safety & Environmental Protection，2017，44(5)：40–44.
|
| [24] |
钱鸣高，石平五，许家林. 矿山压力与岩层控制[M]. 徐州：中国矿业大学出版社，2010.
|
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