Citation: | SHAO Xiaoping,TIAN Chuang,LIU Lang,et al. Flow settlement law of gangue paste-like filling slurry in room-and-pillar goaf[J]. Coal Science and Technology,2025,53(4):202−219. DOI: 10.12438/cst.2023-1969 |
The development process of Yushenfu mining area has formed a large range of room and pillar goaf, resulting in a large area of suspended roof area. After a long period of natural weathering and creep, the support strength of the coal pillar in the hanging roof area is weakened, and there is a risk of instability and failure, and even a mine earthquake disaster. Based on the background of the treatment of the hanging roof area of the room-and-pillar goaf in a mine in Yushenfu mining area, this paper studies the flow and settlement law of the gangue paste-like slurry in the room-and-pillar goaf by building a room-and-pillar goaf simulation test platform based on the similarity theory. The study shows that after the filling, a natural slope of about 5° from the inlet to the exhaust hole is formed on the surface of the filling body; The filling rate near the inlet is the highest, and the filling rate decreases with the increase of flow distance. The ultrasonic wave velocity in the middle and lower parts of the slurry increases with time, while the upper part decreases first and then increases slowly. The slurry has better static anti-segregation performance as a whole; the proportion of coarse (fine) particle size gradually decreases (increases) along the flow direction, and the proportion of particle size near the vent side between adjacent coal pillars is slightly higher. The proportion of coarse (fine) particle size in the lower part is relatively large (small), and the proportion of coarse (fine) particle size in the upper part is relatively small (large); the strength of the filling sample shows a wave-like variation along the flow direction. The strength near the vent side is higher, and the strength of the filling sample increases with depth. The macroscopic defects of the filling sample are related to the fact that the bubbles generated inside the slurry cannot be discharged smoothly. Through this study, the flow and settlement law of filling slurry in room and pillar goaf is revealed, which can provide reference for the treatment of goaf and the elimination of hidden danger of large area suspended roof in similar mines in Yushenfu mining area.
[1] |
刘峰,郭林峰,赵路正. 双碳背景下煤炭安全区间与绿色低碳技术路径[J]. 煤炭学报,2022,47(1):1−15.
LIU Feng,GUO Linfeng,ZHAO Luzheng. Research on coal safety range and green low-carbon technology path under the dual-carbon background[J]. Journal of China Coal Society,2022,47(1):1−15.
|
[2] |
习近平. 在黄河流域生态保护和高质量发展座谈会上的讲话[J]. 当代广西,2019(20):11−13.
XI Jinping. Speech at the symposium on ecological protection and high quality development of the Yellow River Basin[J]. Contemporary Guangxi,2019(20):11−13.
|
[3] |
彭苏萍,毕银丽. 黄河流域煤矿区生态环境修复关键技术与战略思考[J]. 煤炭学报,2020,45(4):1211−1221.
PENG Suping,BI Yinli. Strategic consideration and core technology about environmental ecological restoration in coal mine areas in the Yellow River Basin of China[J]. Journal of China Coal Society,2020,45(4):1211−1221.
|
[4] |
胡振琪,多玲花,王晓彤. 采煤沉陷地夹层式充填复垦原理与方法[J]. 煤炭学报,2018,43(1):198−206.
HU Zhenqi,DUO Linghua,WANG Xiaotong. Principle and method of reclaiming subsidence land with inter-layers of filling materals[J]. Journal of China Coal Society,2018,43(1):198−206.
|
[5] |
邵小平,李龙清,唐仁龙. 浅埋煤层风积沙似膏体条带充填开采技术研究[M]. 徐州:中国矿业大学出版社,2019.
|
[6] |
张森,徐金海,何青源,等. 房柱式开采遗留煤柱骨牌式失稳数值模拟[J]. 煤矿安全,2013,44(4):49−51.
ZHANG Sen,XU Jinhai,HE Qingyuan,et al. Legacy coal pillar domino instability numerical simulation of room and pillar mining[J]. Safety in Coal Mines,2013,44(4):49−51.
|
[7] |
郭广礼,李怀展,查剑锋,等. 平原煤粮主产复合区煤矿开采和耕地保护协同发展研究现状及对策[J]. 煤炭科学技术,2023,51(1):416−426.
GUO Guangli,LI Huaizhan,ZHA Jianfeng,et al. Research status and countermeasures of coordinated development of coal mining and cultivated land protection in the plain coal-cropland overlapped areas[J]. Coal Science and Technology,2023,51(1):416−426.
|
[8] |
胡振琪,袁冬竹. 黄河下游平原煤矿区采煤塌陷地治理的若干基本问题研究[J]. 煤炭学报,2021,46(5):1392−1403.
HU Zhenqi,YUAN Dongzhu. Research on several fundamental issues of coal mining subsidence control in plain coal mining area of the Lower Yellow River[J]. Journal of China Coal Society,2021,46(5):1392−1403.
|
[9] |
许刚刚,王晓东,王海,等. 高浓度胶结充填材料在空洞型采空区中的应用[J]. 煤炭工程,2021,53(11):73−80.
XU Ganggang,WANG Xiaodong,WANG Hai,et al. Treatment technology of cavitary gob area based on high concentration cemented filling material[J]. Coal Engineering,2021,53(11):73−80.
|
[10] |
李传宝. 桩板结构处理高铁采空区路基变形监测研究[J]. 铁道工程学报,2019,36(2):33−37,87. doi: 10.3969/j.issn.1006-2106.2019.02.007
LI Chuanbao. Settlement monitoring test on high-speed railway subgrade above goafs reinforced by pile-plank structure[J]. Journal of Railway Engineering Society,2019,36(2):33−37,87. doi: 10.3969/j.issn.1006-2106.2019.02.007
|
[11] |
陈凯,陈清通,孙庆先,等. 大同采煤沉陷区光伏示范基地建设采空区注浆治理技术应用[J]. 煤矿安全,2018,49(8):169−172.
CHEN Kai,CHEN Qingtong,SUN Qingxian,et al. Application of grouting treatment technology in goaf for photovoltaic demonstration base in Datong coal mining subsidence area[J]. Safety in Coal Mines,2018,49(8):169−172.
|
[12] |
石永奎,郝建,韩作振,等. 采空区充填复采与灾害预控技术[M]. 徐州:中国矿业大学出版社,2014.
|
[13] |
安百富. 固体密实充填回收房式煤柱围岩稳定性控制研究[D]. 徐州:中国矿业大学,2016.
AN Baifu. Controlling mechanism of surround rock stabilityin recovering room mining standing pillars by consolidated solid backfilling mining[D]. Xuzhou:China University of Mining and Technology,2016.
|
[14] |
许文远,杨小聪,郭利杰. 充填体不均匀性相似模拟实验研究[J]. 金属矿山,2011(5):18−22,69.
XU Wenyuan,YANG Xiaocong,GUO Lijie. Experimental research on inhomogeneous simulation of fill-body[J]. Metal Mine,2011(5):18−22,69.
|
[15] |
汤丽,肖卫国. 采场中充填料浆流动规律的研究[J]. 矿业研究与开发,2005,25(2):7−9. doi: 10.3969/j.issn.1005-2763.2005.02.003
TANG Li,XIAO Weiguo. Study on flowing law of fill slurry in stope[J]. Mining Research and Development,2005,25(2):7−9. doi: 10.3969/j.issn.1005-2763.2005.02.003
|
[16] |
王新民,肖卫国,张钦礼. 深井矿山充填理论与技术[M]. 长沙:中南大学出版社,2005.
|
[17] |
CHEN Q S,ZHANG Q L,FOURIE A,et al. Experimental investigation on the strength characteristics of cement paste backfill in a similar stope model and its mechanism[J]. Construction and Building Materials,2017,154:34−43. doi: 10.1016/j.conbuildmat.2017.07.142
|
[18] |
刘浪. 矿山充填膏体配比优化与流动特性研究[D]. 长沙:中南大学,2013.
LIU Lang. Research on proportion optimization and flow characteristic of backfill paste in mine sites[D]. Changsha:Central South University,2013.
|
[19] |
甘德清,申梦飞,孙光华,等. 金属矿山充填体强度分布规律实验研究[J]. 金属矿山,2016(4):32−35. doi: 10.3969/j.issn.1001-1250.2016.04.006
GAN Deqing,SHEN Mengfei,SUN Guanghua,et al. Experimental study on strength distribution of filling body in metal mine[J]. Metal Mine,2016(4):32−35. doi: 10.3969/j.issn.1001-1250.2016.04.006
|
[20] |
卢宏建,梁鹏,南世卿,等. 采场充填料浆流动轨迹探究与充填体特性分析[J]. 金属矿山,2016(10):31−34. doi: 10.3969/j.issn.1001-1250.2016.10.007
LU Hongjian,LIANG Peng,NAN Shiqing,et al. Flow track exploration of filling slurry and characteristic analysis of filling material in stope[J]. Metal Mine,2016(10):31−34. doi: 10.3969/j.issn.1001-1250.2016.10.007
|
[21] |
卢宏建,梁鹏,甘德清,等. 充填料浆流动沉降规律与充填体力学特性研究[J]. 岩土力学,2017(S1):263−270.
LU Hongjian,LIANG Peng,GAN Deqing,et al. Research on flow sedimentation law of filling slurry and mechanical characteristics of backfill body[J]. Rock and Soil Mechanics,2017(S1):263−270.
|
[22] |
史采星,郭利杰,陈鑫政. 采场充填料浆流动与离析规律的试验研究[J]. 黄金科学技术,2018,26(4):520−527. doi: 10.11872/j.issn.1005-2518.2018.04.520
SHI Caixing,GUO Lijie,CHEN Xinzheng. Experimental study on the law of flow and segregation of filing slurry in stope[J]. Gold Science and Technology,2018,26(4):520−527. doi: 10.11872/j.issn.1005-2518.2018.04.520
|
[23] |
邱华富,刘浪,孙伟博,等. 采空区充填体强度分布规律试验研究[J]. 中南大学学报(自然科学版),2018,49(10):2584−2592. doi: 10.11817/j.issn.1672-7207.2018.10.027
QIU Huafu,LIU Lang,SUN Weibo,et al. Experimental study on strength distribution of backfill in goaf[J]. Journal of Central South University (Science and Technology),2018,49(10):2584−2592. doi: 10.11817/j.issn.1672-7207.2018.10.027
|
[24] |
方治余. 高温深井下含冰粒充填料浆流动沉降规律研究[D]. 西安:西安科技大学,2020.
FANG Zhiyu. Investigation on the Flow and Settlement Law of Ice-containingCemented Paste Backfill Slurry in High Temperature and DeepWell[D]. Xi’an:Xi’an University of Science and Technology,2020.
|
[25] |
朱磊,宋天奇,古文哲,等. 矸石浆体输送阻力特性及采空区流动规律试验研究[J]. 煤炭学报,2022,47(S1):39−48.
ZHU Lei,SONG Tianqi,GU Wenzhe,et al. Experimental research on transport-resistance characteristics of gangueslurry and its flow trend in the goaf[J]. Journal of China Coal Society,2022,47(S1):39−48.
|
[26] |
郭利杰,刘光生,马青海,等. 金属矿山充填采矿技术应用研究进展[J]. 煤炭学报,2022,47(12):4182−4200.
GUO Lijie,LIU Guangsheng,MA Qinghai,et al. Research progress on mining with backfill technology of underground metalliferous mine[J]. Journal of China Coal Society,2022,47(12):4182−4200.
|
[27] |
SHAO X P,TIAN C,LI C,et al. The experimental investigation on mechanics and damage characteristics of the aeolian sand paste-like backfill materials based on acoustic emission[J]. Materials,2022,15(20):7235. doi: 10.3390/ma15207235
|
[28] |
徐文彬,杨宝贵,杨胜利,等. 矸石充填料浆流变特性与颗粒级配相关性试验研究[J]. 中南大学学报(自然科学版),2016,47(4):1282−1289. doi: 10.11817/j.issn.1672-7207.2016.04.026
XU Wenbin,YANG Baogui,YANG Shengli,et al. Experimental study on correlativity between rheological parameters and grain grading of coal gauge backfill slurry[J]. Journal of Central South University (Science and Technology),2016,47(4):1282−1289. doi: 10.11817/j.issn.1672-7207.2016.04.026
|
[29] |
李庆东. 煤矸石胶结充填材料静态抗离析性能研究[D]. 太原:太原理工大学,2019.
LI Qingdong. Static segregation of cemented coal gangue backfill[D]. Taiyuan:Taiyuan University of Technology,2019.
|
[30] |
SHAO X P,WANG L,LI X,et al. Study on rheological and mechanical properties of aeolian sand-fly ash-based filling slurry[J]. Energies,2020,13(5):1266. doi: 10.3390/en13051266
|
[31] |
冯国瑞,李庆东,戚庭野,等. 超声波法评价矸石膏体的静态抗离析性能[J]. 采矿与安全工程学报,2020,37(6):1231−1237.
FENG Guorui,LI Qingdong,QI Tingye,et al. Assessing static stability of cemented coal gangue backfill with ultrasonic pulse velocity method[J]. Journal of Mining & Safety Engineering,2020,37(6):1231−1237.
|
[32] |
何俊,吕晓龙,朱元军. 养护温度对碱渣-矿渣固化淤泥强度性质影响机制[J]. 水利水电科技进展,2023,43(5):58−65.
HE Jun,LYU Xiaolong,ZHU Yuanjun. Influencing mechanism of curing temperature on strength properties of silt solidified with soda residue,ground granulated blast furnace slag and carbide slag[J]. Advances in Science and Technology of Water Resources,2023,43(5):58−65.
|
[33] |
高玉军,邓翀,秦明强,等. 铁路隧道C30早高强喷射混凝土试验研究与应用[J]. 建筑材料学报,2023,26(9):1011−1022. doi: 10.3969/j.issn.1007-9629.2023.09.009
GAO Yujun,DENG Chong,QIN Mingqiang,et al. Experimental research and application of C30 early and high-strength shotcrete in railway tunnel[J]. Journal of Building Materials,2023,26(9):1011−1022. doi: 10.3969/j.issn.1007-9629.2023.09.009
|
[34] |
苏红艳,宋平新,何强. 不同养护温度下水泥基尾砂胶结充填体的力学特性及能量演化规律[J]. 采矿与岩层控制工程学报,2023,5(2):51−61.
S U Hongyan,SONG Pingxin,HE Qiang. Mechanical properties and energy evolution of cemented tailings backfill at different curingtemperatures[J]. Journal of Mining and Strata Control Engineering,2023,5(2):51−61.
|
[35] |
LIBOS I L S,CUI L,LIU X R. Effect of curing temperature on time-dependent shear behavior and properties of polypropylene fiber-reinforced cemented paste backfill[J]. Construction and Building Materials,2021,311:125302. doi: 10.1016/j.conbuildmat.2021.125302
|
[36] |
CHEN S M,WU A X,WANG Y M,et al. Coupled effects of curing stress and curing temperature on mechanical and physical properties of cemented paste backfill[J]. Construction and Building Materials,2021,273:121746. doi: 10.1016/j.conbuildmat.2020.121746
|
[37] |
张思佳,吴葵,纪国晋,等. 掺脱硝粉煤灰混凝土中的氨气释放规律研究[J]. 水利水电技术,2020,51(10):202−208.
ZHANG Sijia,WU Kui,JI Guojin,et al. Study on law of ammonia releasing from concrete mixed with denitrated fly ash[J]. Water Resources and Hydropower Engineering,2020,51(10):202−208.
|
[38] |
罗祥,王玲,王振地. 混凝土中气泡的产生与发展:机理和影响因素[J]. 材料导报,2021,35(S2):213−217.
LUO Xiang,WANG Ling,WANG Zhendi. Mechanism and influencing factors of bubble generation and evolution in concrete[J]. Materials Reports,2021,35(S2):213−217.
|
[39] |
BEATA Ł P. Examining the possibility to estimate the influence of admixtures on pore structure of self-compacting concrete using the air void analyzer[J]. Construction and Building Materials,2013,41:374−387. doi: 10.1016/j.conbuildmat.2012.11.100
|
[40] |
TANG R L,ZHAO B C,LI C,et al. Experimental study on the effect of fly ash with ammonium salt content on the properties of cemented paste backfill[J]. Construction and Building Materials,2023,369:130513. doi: 10.1016/j.conbuildmat.2023.130513
|
[41] |
李亚娇,鱼郑,鞠恺,等. 粉煤灰基膏体充填脱氨方法研究综述[J]. 煤炭科学技术,2023,51(6):265−274.
LI Yajiao,YU Zheng,JU Kai,et al. A review of fly ash-based paste filling deamination methods[J]. Coal Science and Technology,2023,51(6):265−274.
|