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Abstract

Goaf seriously restricts the overall planning, ecological environment, and economic development of Urumqi City. In view of the characteristics of large mining thickness, shallow buried depth, and steep slope of coal seams in Urumqi, this paper adopted full filling pressure grouting reinforcement measures to treat the goaf of steep slope coal seams under the east second ring road project in Urumqi City. The research results show that the underlying goaf in the study area has the characteristics of steep inclination, common development of multi-layer goaf, and transboundary mining. The maximum residual settlement of the goaf under the road section in the study area is about 877 mm, which is still in an unstable state. The treatment scheme of full filling pressure grouting is mainly used to fill the goaf and reinforce the security coal pillar area. The length of the treatment is 300 m; the width is 234 m, and the grouting volume is about 45 174 m3. Finally, the safety test is carried out by means of a drilling test, wave velocity logging in the hole, and ground settlement observation. The grout strengthens the grouting effect to a certain extent, and the grouting quality meets the requirements.

Publication Date

6-18-2022

DOI

10.14048/j.issn.1671-2579.2022.03.005

First Page

26

Last Page

29

Submission Date

May 2025

Reference

[1] 李晓红, 姜德义, 刘春, 等. 公路隧道穿越采空区治理技术研究[J]. 岩土力学, 2005, 26(6): 910-914. LI Xiaohong, JIANG Deyi, LIU Chun, et al. Study on treatment technology of highway tunnel through working out area[J]. Rock and Soil Mechanics, 2005, 26(6): 910-914. [2] 王新锋. 榆神高速公路路基采空区治理技术研究[D]. 西安: 西安科技大学, 2013. WANG Xinfeng. Research on treatment technologies for goaf areas in yushen expressway subgrade[D]. Xi’an: Xi’an University of Science and Technology, 2013. [3] 王锐, 田娇. 上覆煤层采空区对公路隧道的影响分析及处治技术[J]. 中外公路, 2019, 39(5): 194-197. WANG Rui, TIAN Jiao. Impact analysis and treatment technology of overlying coal goaf on highway tunnels[J]. Journal of China & Foreign Highway, 2019, 39(5): 194-197. [4] 付小铜. 营涝公路下伏采空区探测与注浆治理实践[J]. 中国矿业, 2018, 27(7): 161-162, 167. FU Xiaotong. Practice of detection and grouting for coal goaf under Yinglao road[J]. China Mining Magazine, 2018, 27(7): 161-162, 167. [5] 高崇华, 岳志勤, 丁浩江, 等. 成贵铁路工程环境与线路选线设计[J]. 铁道工程学报, 2019, 36(6): 9-13, 50. GAO Chonghua, YUE Zhiqin, DING Haojiang, et al. The engineering environment and line selection design of Chengdu-Guiyang railway[J]. Journal of Railway Engineering Society, 2019, 36(6): 9-13, 50. [6] 李云龙, 郭春颖, 徐敏, 等. 六道湾煤矿西翼塌陷区沉降变形规律研究[J]. 中国矿业, 2010, 19(5): 94-96, 99. LI Yunlong, GUO Chunying, XU Min, et al. West part of Liudaowan coal mines' collapse area subsidence distortion rule research[J]. China Mining Magazine, 2010, 19(5): 94-96, 99. [7] 蔡文惠. 新疆乌鲁木齐市六道湾煤矿塌陷区的勘察及环境治理[D]. 阜新: 辽宁工程技术大学, 2007. CAI Wenhui. Investigation and environmental remediation of the liudaowan coal mine subsidence area in Urumqi, Xinjiang [D]. Fuxin: Liaoning Technical University, 2007. [8] 张为, 信晓东, 李玲. 六道湾煤矿开采对城市环境的影响[J]. 煤矿安全, 2010, 41(2): 101-102. ZHANG Wei, XIN Xiaodong, LI Ling. Impact of the mining of the liudaowan coal mine on urban environment[J]. Safety in Coal Mines, 2010, 41(2): 101-102. [9] 张志沛, 刘杨, 任建军, 等. 急倾斜煤层采空区注浆工程施工工艺研究[J]. 施工技术, 2018, 47(1): 134-137. ZHANG Zhipei, LIU Yang, REN Jianjun, et al. Study on the technique of drilling and grouting along the striking in steep seam gob[J]. Construction Technology, 2018, 47(1): 134-137. [10] 郭良春. 乌市东二环急倾斜煤层采空区稳定性与治理方案分析[D]. 西安: 西安科技大学, 2012. GUO Liangchun. Stability analysis and treatment scheme for steeply inclined coal seam goaf in urumqi east second ring road[D]. Xi’an: Xi’an University of Science and Technology, 2012. [11] 郭增长, 柴华彬. 煤矿开采沉陷学[M]. 北京: 煤炭工业出版社, 2013. GUO Zengchang, CHAI Huabin. Coal mining subsidence engineering[M]. Beijing: China Coal Industry Publishing House, 2013. [12] 李文,李健.资源整合煤矿采空区灾害特点及防治对策 [J].煤矿安全,2015,46(7):179-181. Li Wen, Li Jian. Disaster characteristics and prevention countermeasures of goaf in resource-integrated coal mines [J]. Safety in Coal Mines, 2015, 46(7): 179-181.

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