| Citation: |
GUO Wenbing，WU Dongtao，GUO Mingjie，et al. Multi-bed separation grouting in “three soft” thick coal seams mining and its application[J]. Coal Science and Technology，2025，53（5）：1−12. DOI: 10.12438/cst.2024-0344
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Accurate identification of the grouting position in overburden isolated grouting and the reasonable determination of the protective layer thickness are of significant importance for preventing surface subsidence and protecting surface buildings and infrastructures. In order to realize the accurate grouting and reduce subsidence in multi-bed separation grouting. By improving the method for determining separation positions based on the composite beam theory, the filling positions for multi-bed separation grouting were determined. Using the theory of elastic thin plates, a structural mechanical model of the protective layer for overburden isolated grouting was established. An equivalent model for the grouting filling space of overburden isolated separation was constructed, and the minimum and maximum total volumes of the grouting filling space were determined according to the breaking law of the upper and lower rock layers in the grouting space. The effect of multi-bed separation grouting in “three soft” thick coal seams was evaluated through the use of probability integrals, combined with actual surface monitoring results. Additionally, 22151 working face of Peigou Coal Mine in Zhengzhou mining area was analyzed as case study. The results show that field borehole observation validated the accuracy of the bed separation positions. Multi-bed separation grouting was successfully implemented between the bottom of medium grained sandstone 152.6 m away from the coal seam and the bottom of fine-grained sandstone 168.6 m away from the coal seam. When the mining thickness of the working face is 7.1 m, a protective layer thickness of 25.2 m ensured the safe implementation of overburden isolated grouting. Theoretical grouting volume calculations range from approximately 9.5 × 104 to 14.7 × 104 tons while the actual engineering grouting volume for multi-bed separation grouting is approximately 13.3 × 104 tons, with a grouting-to-mining ratio of about 0.41. The maximum surface subsidence is 649.8 mm, and the maximum horizontal deformation value of the surface at most residential buildings is within the Ⅰ degree of damage. The surface subsidence control effect of mining with multi-bed separation grouting was remarkable, and the subsidence reduction rate was about 77.91%.
| [1] |
王双明,申艳军,宋世杰,等. “双碳”目标下煤炭能源地位变化与绿色低碳开发[J]. 煤炭学报,2023,48(7):2599−2612.
WANG Shuangming,SHEN Yanjun,SONG Shijie,et al. Change of coal energy status and green and low-carbon development under the“dual carbon”goal[J]. Journal of China Coal Society,2023,48(7):2599−2612.
|
| [2] |
杨科,赵新元,何祥,等. 多源煤基固废绿色充填基础理论与技术体系[J]. 煤炭学报,2022,47(12):4201−4216.
YANG Ke,ZHAO Xinyuan,HE Xiang,et al. Basic theory and key technology of multi-source coal-based solid waste for green backfilling[J]. Journal of China Coal Society,2022,47(12):4201−4216.
|
| [3] |
轩大洋,许家林,王秉龙. 覆岩隔离注浆充填绿色开采技术[J]. 煤炭学报,2022,47(12):4265−4277.
XUAN Dayang,XU Jialin,WANG Binglong. Green mining technology of overburden isolated grout injection[J]. Journal of China Coal Society,2022,47(12):4265−4277.
|
| [4] |
郭文兵,赵高博,白二虎,等. 中部矿粮复合区采煤沉陷及耕地损毁研究现状与展望[J]. 煤炭学报,2023,48(1):388−401.
GUO Wenbing,ZHAO Gaobo,BAI Erhu,et al. Research status and prospect on cultivated land damage at surface subsidence basin due to longwall mining in the central coal grain compound area[J]. Journal of China Coal Society,2023,48(1):388−401.
|
| [5] |
徐平,郭文兵,张敏霞. 控制采动区桥梁移动变形方法研究[J]. 采矿与安全工程学报,2011,28(3):425−429. doi: 10.3969/j.issn.1673-3363.2011.03.017
XU Ping,GUO Wenbing,ZHANG Minxia. Methods of controlling movement and deformation of mining induced bridge[J]. Journal of Mining & Safety Engineering,2011,28(3):425−429. doi: 10.3969/j.issn.1673-3363.2011.03.017
|
| [6] |
韩磊,杨科,王天君,等. 采动覆岩离层注浆地表沉陷“四区”控制模型及应用[J]. 煤炭科学技术,2023,51(8):23−35.
HAN Lei,YANG Ke,WANG Tianjun,et al. “Four Zones” control model and application for surface subsidence of bed separation grouting mining[J]. Coal Science and Technology,2023,51(8):23−35.
|
| [7] |
钟亚平. 建筑物下综放开采特厚煤层覆岩离层注浆[J]. 煤炭科学技术,2001,29(1):5−6. doi: 10.3969/j.issn.0253-2336.2001.01.002
ZHONG Yaping. Practices on fully mechanized caving mining in special thick seam under building structures with grouting in overburdens[J]. Coal Science and Technology,2001,29(1):5−6. doi: 10.3969/j.issn.0253-2336.2001.01.002
|
| [8] |
杨伦. 对采动覆岩离层注浆减沉技术的再认识[J]. 煤炭学报,2002,27(4):352−356. doi: 10.3321/j.issn:0253-9993.2002.04.004
YANG Lun. Re-understand the technology of reducing the subsidence due to mining by injecting grouts into separated beds in overlying disrupted strata by extraction[J]. Journal of China Coal Society,2002,27(4):352−356. doi: 10.3321/j.issn:0253-9993.2002.04.004
|
| [9] |
高延法,钟亚平,李建民,等. 覆岩离层带多层位注浆减沉的理论与实践[J]. 煤矿开采,2002,7(2):42−45. doi: 10.3969/j.issn.1006-6225.2002.02.017
GAO Yanfa,ZHONG Yaping,LI Jianmin,et al. Theory and practice of subsidence control by multi-layer grouting in overburden bed-separation zone[J]. Coal Mining Technology,2002,7(2):42−45. doi: 10.3969/j.issn.1006-6225.2002.02.017
|
| [10] |
杨伦,于广明,王旭春,等. 煤矿覆岩采动离层位置的计算[J]. 煤炭学报,1997,22(5):477−480. doi: 10.3321/j.issn:0253-9993.1997.05.006
YANG Lun,YU Guangming,WANG Xuchun,et al. Calculation of position of separated strata due to mining in coal mine[J]. Journal of China Coal Society,1997,22(5):477−480. doi: 10.3321/j.issn:0253-9993.1997.05.006
|
| [11] |
朴春德,施斌,魏广庆,等. 采动覆岩变形BOTDA分布式测量及离层分析[J]. 采矿与安全工程学报,2015,32(3):376−381.
PIAO Chunde,SHI Bin,WEI Guangqing,et al. BOTDA distributed measurement and analysis of mining overburden separation[J]. Journal of Mining & Safety Engineering,2015,32(3):376−381.
|
| [12] |
孙学阳,付恒心,寇规规,等. 综采工作面顶板次生离层水害形成机理分析[J]. 采矿与安全工程学报,2017,34(4):678−683.
SUN Xueyang,FU Hengxin,KOU Guigui,et al. Mechanism of water hazard caused by the secondary separation in the overburden stratum of the fully mechanized coal face[J]. Journal of Mining & Safety Engineering,2017,34(4):678−683.
|
| [13] |
徐超,王凯,郭琳,等. 采动覆岩裂隙与渗流分形演化规律及工程应用[J]. 岩石力学与工程学报,2022,41(12):2389−2403.
XU Chao,WANG Kai,GUO Lin,et al. Fractal evolution law of overlying rock fracture and seepage caused by mining and its engineering application[J]. Chinese Journal of Rock Mechanics and Engineering,2022,41(12):2389−2403.
|
| [14] |
WANG S F,LI X B,WANG S Y. Separation and fracturing in overlying strata disturbed by longwall mining in a mineral deposit seam[J]. Engineering Geology,2017,226:257−266. doi: 10.1016/j.enggeo.2017.06.015
|
| [15] |
崔希民,高宇,李培现,等. 采动覆岩与地表下沉关系模型及离层量估算方法[J]. 煤炭学报,2023,48(1):74−82.
CUI Ximin,GAO Yu,LI Peixian,et al. Relationships of mining subsidence between overburden rock and surface and application to estimate bed separation[J]. Journal of China Coal Society,2023,48(1):74−82.
|
| [16] |
钱鸣高. 岩层控制的关键层理论[M]. 徐州:中国矿业大学出版社,2000.
|
| [17] |
许家林,钱鸣高,金宏伟. 岩层移动离层演化规律及其应用研究[J]. 岩土工程学报,2004,26(5):632−636. doi: 10.3321/j.issn:1000-4548.2004.05.012
XU Jialin,QIAN Minggao,JIN Hongwei. Study and application of bed separation distribution and development in the process of strata movement[J]. Chinese Journal of Geotechnical Engineering,2004,26(5):632−636. doi: 10.3321/j.issn:1000-4548.2004.05.012
|
| [18] |
许家林,轩大洋,朱卫兵,等. 部分充填采煤技术的研究与实践[J]. 煤炭学报,2015,40(6):1303−1312.
XU Jialin,XUAN Dayang,ZHU Weibing,et al. Study and application of coal mining with partial backfilling[J]. Journal of China Coal Society,2015,40(6):1303−1312.
|
| [19] |
许家林,倪建明,轩大洋,等. 覆岩隔离注浆充填不迁村采煤技术[J]. 煤炭科学技术,2015,43(12):8−11.
XU Jialin,NI Jianming,XUAN Dayang,et al. Coal mining technology without village relocation by isolated grout injection into overburden[J]. Coal Science and Technology,2015,43(12):8−11.
|
| [20] |
轩大洋,许家林. 铁路隧道下综放面覆岩隔离注浆充填开采试验研究[J]. 采矿与安全工程学报,2023,40(5):1102−1110.
XUAN Dayang,XU Jialin. Field study of longwall fully-mechanized caving mining by overburden isolated grouting under a surface railway tunnel[J]. Journal of Mining & Safety Engineering,2023,40(5):1102−1110.
|
| [21] |
PALCHIK V. Localization of mining-induced horizontal fractures along rock layer interfaces in overburden:Field measurements and prediction[J]. Environmental Geology,2005,48(1):68−80. doi: 10.1007/s00254-005-1261-y
|
| [22] |
CHENG G W,MA T H,TANG C N,et al. A zoning model for coal mining - induced strata movement based on microseismic monitoring[J]. International Journal of Rock Mechanics and Mining Sciences,2017,94:123−138. doi: 10.1016/j.ijrmms.2017.03.001
|
| [23] |
滕永海,阎振斌. 采动过程中覆岩离层发育规律的研究[J]. 煤炭学报,1999,24(1):25−28. doi: 10.3321/j.issn:0253-9993.1999.01.006
TENG Yonghai,YAN Zhenbin. Study on the development law of overlying strata separation during mining[J]. Journal of China Coal Society,1999,24(1):25−28. doi: 10.3321/j.issn:0253-9993.1999.01.006
|
| [24] |
来兴平,张旭东,单鹏飞,等. 厚松散层下三软煤层开采覆岩导水裂隙发育规律[J]. 岩石力学与工程学报,2021,40(9):1739−1750.
LAI Xingping,ZHANG Xudong,SHAN Pengfei,et al. Study on development law of water-conducting fractures in overlying strata of three soft coal seam mining under thick loose layers[J]. Chinese Journal of Rock Mechanics and Engineering,2021,40(9):1739−1750.
|
| [25] |
郭文兵,杨治国,詹鸣. “三软” 煤层开采沉陷规律及其应用[M]. 北京:科学出版社,2013.
|
| [26] |
侯恩科,谢晓深,王双明,等. 中深埋厚煤层开采地下水位动态变化规律及形成机制[J]. 煤炭学报,2021,46(5):1404−1416.
HOU Enke,XIE Xiaoshen,WANG Shuangming,et al. Dynamic law and mechanism of groundwater induced by medium-deep buried and thick coal seam mining[J]. Journal of China Coal Society,2021,46(5):1404−1416.
|
| [27] |
胡炳南,张华兴,申宝宏. 建筑物、水体、铁路及主要井巷煤柱留设与压煤开采指南[M]. 北京:煤炭工业出版社,2017.
|
| [28] |
HE J H,LI W P,FAN K F,et al. A method for predicting the water-flowing fractured zone height based on an improved key stratum theory[J]. International Journal of Mining Science and Technology,2023,33(1):61−71. doi: 10.1016/j.ijmst.2022.09.021
|
| [29] |
徐芝纶. 弹性力学-上册[M]. 5版. 北京:高等教育出版社,2016.
|
| [30] |
左建平,孙运江,钱鸣高. 厚松散层覆岩移动机理及“类双曲线” 模型[J]. 煤炭学报,2017,42(6):1372−1379.
ZUO Jianping,SUN Yunjiang,QIAN Minggao. Movement mechanism and analogous hyperbola model of overlying strata with thick alluvium[J]. Journal of China Coal Society,2017,42(6):1372−1379.
|
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