| Citation: |
ZHANG Jie，HE Yifeng. Research on the fracture evolution law and combined bearing structure load of shallow buried coal seam group[J]. Coal Science and Technology，2023，51（9）：65−76. DOI: 10.13199/j.cnki.cst.2022-1108
|
The high-intensity mining of shallow-buried coal seams leads to the fracture of the bearing strata to form a combined bearing structure, which complicates the distribution of cracks in the overlying rock and causes serious damage to the surface. In order to study the relationship between the evolution law of the overburden fissures and the bearing structure of the bearing rock in the mining of the shallow coal seam group, and the working resistance value of the support to keep the bearing rock stable, the coal mining of Hanjiawan Coal Mine 2−2 and 3−1 in the Shenfu mining area in northern Shaanxi was studied. In the background, through field observation and similar simulation experiments, the evolution law of coal seam group mining cracks, the combined bearing structure of bearing rock layers and the relationship between the two were obtained. The mechanical model of combined bearing structure was established by theoretical calculation method, and the support work of the combined bearing rock layer to maintain stability was studied. resistance. The research shows that the evolution process of overlying fissures in coal seam mining can be divided into four stages: the upper coal seam mining rapid growth stage, the upper coal seam mining steady growth stage, the lower coal seam mining rapid growth stage, and the lower coal seam mining stable growth stage. This leads to different fissure evolution forms and subsidence characteristics on the surface. The surface of the “step rock beam” structure subsides in steps, and the surface of the “hinge rock beam” structure subsides continuously; The fractured structure of the bearing rock formation in the lower coal seam is obtained from the filling rate and mining height of the interlayer, and it is revealed that the fractured combined structure of the bearing rock formation in the shallow buried coal seam mining group is “step-hinged” structure, “hinged-hinged” structure, “hinged-hinged” structure. The combined form of the “step” structure and the “step-step” structure. Based on the fractured composite structure of the bearing rock, the mechanical model of the bearing rock bearing structure of the shallow buried coal seam group mining is established, and the calculation method of the working resistance of the bearing rock to maintain the stability of the support is obtained, and the field measurement results are verified.
| [1] |
黄庆享. 浅埋煤层的矿压特征与浅埋煤层定义[J]. 岩石力学与工程学报,2002,21(8):1174−1177. doi: 10.3321/j.issn:1000-6915.2002.08.014
HUANG Qingxiang. Ground pressure behavior and definition of shallow seams[J]. Chinese Journal of Rock Mechanics and Engineering,2002,21(8):1174−1177. doi: 10.3321/j.issn:1000-6915.2002.08.014
|
| [2] |
刘清洲,张 杰,赵加才,等. 浅埋煤层覆岩采动裂缝对采空区漏风影响的研究[J]. 煤炭工程,2021,53(12):131−135.
LIU Qingzhou,ZHANG Jie,ZHAO Jiacai,et al. Influence of mining-induced fracture in overburden of shallow buried coal seam to air leakage in goaf[J]. Coal Engineering,2021,53(12):131−135.
|
| [3] |
董书宁,姬亚东,王 皓,等. 鄂尔多斯盆地侏罗纪煤田典型顶板水害防控技术与应用[J]. 煤炭学报,2020,45(7):2367−2375.
DONG Shuning,JI Yadong,WANG Hao,et al. Prevention and control technology and application of roof water disaster in Jurassic coal field of Ordos Basin[J]. Journal of China Coal Society,2020,45(7):2367−2375.
|
| [4] |
赵毅鑫,刘文超,张 村,等. 近距离煤层蹬空开采围岩应力及裂隙演化规律[J]. 煤炭学报,2022,47(1):259−273.
ZHAO Yixin,LIU Wenchao,ZHANG Cun,et al. Stress and fracture evolution of surrounding rock during mining above mined out area in contiguous coal seams[J]. Journal of China Coal Society,2022,47(1):259−273.
|
| [5] |
杨登峰,张拥军,王 盛,等. 浅埋煤层顶板隐伏断层倾角对矿压显现影响分析[J]. 采矿与岩层控制工程学报,2020,2(4):72−82.
YANG Dengfeng,ZHANG Yongjun,WANG Sheng,et al. Analysis of the influence of hidden fault dip angle on ground pressure behavior in shallow seam roof[J]. Journal of Mining and Strata Control Engineering,2020,2(4):72−82.
|
| [6] |
李建伟,刘长友,赵 杰,等. 沟谷区域浅埋煤层采动矿压发生机理及控制研究[J]. 煤炭科学技术,2018,46(9):104−110.
LI Jianwei,LIU Changyou,ZHAO Jie,et al. Study on occurrence mechanism and control technology of mining-induced strata pressure in shallow depth coal seams of valley region[J]. Coal Science and Technology,2018,46(9):104−110.
|
| [7] |
黄庆享,周金龙. 浅埋煤层大采高工作面矿压规律及顶板结构研究[J]. 煤炭学报,2016,41(S2):279−286.
HUANG Qingxiang,ZHOU Jinlong. Roof weighting behavior and roof structure of large mining height longwall face in shallow coal seam[J]. Journal of China Coal Society,2016,41(S2):279−286.
|
| [8] |
杨治林. 浅埋煤层长壁开采顶板岩层的不稳定性态[J]. 煤炭学报,2008,33(12):1341−1345.
YANG Zhilin. Instability behavior for roof strata in shallow seam longwall mining[J]. Journal of China Coal Society,2008,33(12):1341−1345.
|
| [9] |
黄庆享,杜君武,侯恩科,等. 浅埋煤层群覆岩与地表裂隙发育规律和形成机理研究[J]. 采矿与安全工程学报,2019,36(1):7−15.
HUANG Qingxiang,DU Junwu,HOU Enke,et al. Research on overburden and ground surface cracks distribution and formation mechanism in shallow coal seams group mining[J]. Journal of Mining and Strata Control Engineering,2019,36(1):7−15.
|
| [10] |
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.
|
| [11] |
杨敬轩,刘长友,杨 宇,等. 浅埋近距离煤层房柱采空区下顶板承载及房柱尺寸[J]. 中国矿业大学学报,2013,42(2):161−168.
YANG Jingting,LIU Changyou,YANG Yu,et al. Study of the bear-ing mechanism of the coal roof and the dimension selection of theroom and pillar[J]. Journal of China University of Mining & Technology,2013,42(2):161−168.
|
| [12] |
侯忠杰. 对浅埋煤层“短砌体梁”、“台阶岩梁”结构与砌体梁理论的商榷[J]. 煤炭学报,2008,33(11):1201−1204. doi: 10.3321/j.issn:0253-9993.2008.11.001
HOU Zhongjie. Concept of both short voussoir beam and step beam in shallow seam and voussior beam theory[J]. Journal of China Coal Society,2008,33(11):1201−1204. doi: 10.3321/j.issn:0253-9993.2008.11.001
|
| [13] |
张 杰,何义峰,罗南洪,等. 浅埋煤层群重复采动覆岩运移及裂隙演化规律研究[J]. 煤矿安全,2022,53(3):58−65. doi: 10.13347/j.cnki.mkaq.2022.03.010
ZHANG Jie,HE Yifeng,LUO Nanhong,et al. Research on the movement and fracture evolution of overburden in the repeated mining of shallow coal seams group[J]. Safety in Coal Mines,2022,53(3):58−65. doi: 10.13347/j.cnki.mkaq.2022.03.010
|
| [14] |
任艳芳. 浅埋深工作面基岩层全厚切落的时空演化过程[J]. 煤炭学报,2020,45(S2):561−570.
REN Yanfang. Spatiotemporal evolution process of full thickness cutting of roof bedrock layer in shallow buried working face[J]. Journal of China Coal Society,2020,45(S2):561−570.
|
| [15] |
徐祝贺,朱润生,何文瑞,等. 厚松散层浅埋煤层大工作面开采沉陷模型研究[J]. 采矿与安全工程学报,2020,7(2):264−271.
XU Zhuhe,ZHU Runsheng,HE Wenrui,et al. Subsidence model of large working face in shallow buried coal seam with thick loose layer[J]. Journal of Mining and Strata Control Engineering,2020,7(2):264−271.
|
| [16] |
侯恩科,陈 育,车晓阳,等. 浅埋煤层过沟开采覆岩破坏特征及裂隙演化规律研究[J]. 煤炭科学技术,2021,49(10):185−192.
HOU Enke,CHEN Yu,CHE Xiaoyang,et al. Study on overburden failure characteristics and fracture evolution law of shallow buried coal seam through trench mining[J]. Coal Science and Technology,2021,49(10):185−192.
|
| [17] |
任艳芳. 浅埋深工作面覆岩“悬臂梁−铰接岩梁”结构的提出与验证[J]. 煤炭学报,2019,44(S1):1−8.
REN Yanfang. Presentation and verification of “cantilever beam-articulated rock beam” composite structure in shallow buried working face[J]. Journal of China Coal Society,2019,44(S1):1−8.
|
| [18] |
黄克军,黄庆享,王苏健,等. 浅埋煤层群采场周期来压顶板结构及支架载荷[J]. 煤炭学报,2018,43(10):2687−2693.
HUANG Kejun,HUANG Qingxiang,WANG Sujian,et al. Research on roof structure and support resistance during periodic weighting in shallow group coal seams mining face[J]. Journal of China Coal Society,2018,43(10):2687−2693.
|
| [19] |
谢和平,张泽天,高 峰,等. 不同开采方式下煤岩应力场−裂隙场−渗流场行为研究[J]. 煤炭学报,2016,41(10):2405−2417.
XIE Heping,ZHANG Zetian,GAO Feng,et al. Stress-fracture-seepage field behavior of coal under different mining layouts[J]. Journal of China Coal Society,2016,41(10):2405−2417.
|
| [20] |
杨滨滨,袁世冲,郑德志,等. 近距离煤层重复采动覆岩裂隙时空演化特征研究[J]. 采矿与安全工程学报,2022,39(2):255−263. doi: 10.13545/j.cnki.jmse.2020.0613
YANG Binbin,YUAN Shichong,ZHENG Dezhi,et al. Spatial and temporal characreristics of overburden fractures due to repeated mining in close distance coal seams[J]. Journal of Mining and Strata Control Engineering,2022,39(2):255−263. doi: 10.13545/j.cnki.jmse.2020.0613
|
| [21] |
黄庆享,赵萌烨,黄克军. 浅埋煤层群开采顶板双关键层结构及支护阻力研究[J]. 中国矿业大学学报,2019,48(1):71−77, 86.
HUANG Qingxiang,ZHAO Mengye,HUANG Kejun. Study of roof double key strata structuru and support resistance of shallow coal seam group mining[J]. Journal of China University of Mining & Technology,2019,48(1):71−77, 86.
|
Supported by: Beijing Renhe Information Technology Co., Ltd. 
DownLoad: