Impact of water accumulation in abandoned mines on adjacent production mines
-
摘要: 闭坑矿井老空水积水会破坏矿界煤柱强度，引起煤柱失效，对邻近生产矿井存在安全威胁。针对目前对矿界煤柱采动损伤后老空水位安全极限的研究不全面的问题，以淮北矿业集团朔石矿业东部井（简称朔石东部井）和淮北双龙矿业有限责任公司（简称双龙公司）为研究对象，分析了朔石东部井闭坑老空水对双龙公司的影响，并提出对应的水害防治措施。通过理论计算和数值模拟研究矿界煤柱采动损伤，根据损伤结果计算老空水位安全极限；基于伯努利方程及Darcy−Weisbach管道流理论，计算井下已有疏水钻孔疏水能力，评价安全性。研究结果表明：在采动影响下，矿界煤柱损伤宽度约为19 m，有效宽度仅为21 m，能承受的最大水位差为33 m，朔石东部井闭坑水位回升至−398 m时，煤柱存在失稳可能；井下现有疏水钻孔疏水量约为89 m3/h，小于矿井实际闭坑涌水量160 m3/h，达到极限水位后，老空水位仍可能持续回升，存在水害威胁。提出了扩大孔径、增补疏水钻孔等水害防治措施，研究结果可为类似条件闭坑水害防治提供借鉴。Abstract: The goaf water accumulation of abandoned mine will damage the strength of boundary coal pillar, cause coal pillar failure, and pose a threat to the safety of adjacent production mine. The research on the safety limit of goaf water level after mining damage of coal pillar at mine boundary is not comprehensive. In order to solve the problem, taking East Shaft of Shuoshi Mining Industry of Huaibei Mining Group(Shuoshi East Shaft) and Huaibei Shuanglong Mining Co., Ltd.(Shuanglong Company) as the research objects, this paper analyzes the impact of goaf water in abandoned mine of Shuoshi East Shaft on Shuanglong Company, and puts forward corresponding water disaster prevention measures. The mining damage of coal pillar at mine boundary is studied by theoretical calculation and numerical simulation, and the safety limit of goaf water level is calculated according to the damage results. Based on the Bernoulli equation and the Darcy-Weisbach pipeline flow theory, the drainage capacity of the existing drainage boreholes is calculated and the safety is evaluated. The research results show that under the impact of mining, the damaged width of coal pillar at the mine boundary is about 19 m, the effective width is only 21 m, and the maximum water level difference that can be borne is 33 m. When the water level in the abandoned mine of Shuoshi East Shaft rises to −398 m, the coal pillar may be unstable. The drainage capacity of the existing drainage boreholes in the mine is about 89 m3/h, which is less than the actual abandoned mine water inflow of 160 m3/h. After reaching the limit water level, the goaf water level may continue to rise, and there is a threat of water disaster. The water disaster prevention and control measures such as enlarging the borehole diameter and adding drainage boreholes are proposed. The research results can provide reference for the water disaster prevention and control of abandoned mine under similar conditions.
-
图 2 双龙公司老空水探查预疏钻孔设计位置
Figure 2. Design location of pre-drain borehole for goaf water exploration of Shuanglong Company
图 6 Ⅱ3721工作面回采数值模拟结果
Figure 6. Numerical simulation results of Ⅱ3721 working face mining
图 7 Ⅱ3123工作面回采数值模拟结果
Figure 7. Numerical simulation results of Ⅱ3123 working face mining
表 1 三维模型中各煤岩层参数
Table 1. Parameters of each rock layer in 3D model
岩性 体积模
量/GPa剪切模
量/GPa内摩擦
角/（°）黏聚
力/GPa抗拉强
度/GPa密度/
（g·cm−3）泥岩 3.60 1.96 27 2.20 1.30 2.43 粉砂岩 6.00 3.43 30 2.30 2.00 2.53 细砂岩 6.50 4.48 30 3.20 2.50 2.54 中砂岩 6.20 3.90 30 3.75 3.85 2.54 3煤 2.13 1.10 25 0.60 0.98 2.30 2煤 2.13 1.10 25 0.60 0.98 2.30 
下载: 导出CSV
-
[1] 武强,李松营. 闭坑矿山的正负生态环境效应与对策[J]. 煤炭学报,2018,43(1):21-32.WU Qiang,LI Songying. Positive and negative environmental effects of closed mines and its countermeasures[J]. Journal of China Coal Society,2018,43(1):21-32. [2] ALHAMED M,WOHNLICH S. Environmental impact of the abandoned coal mines on the surface water and the groundwater quality in the south of Bochum,Germany[J]. Environmental Earth Sciences,2014,72(9):3251-3267. doi: 10.1007/s12665-014-3230-9 [3] 徐德金,邵德盛. 国有煤矿范围内地方小井关闭后诱发的水文地质效应分析[J]. 中国煤炭,2014,40(4):41-44,92. doi: 10.3969/j.issn.1006-530X.2014.04.013XU Dejin,SHAO Desheng. Analysis of hydrologic geology effects induced by closure of local small mines within state-owned mine areas[J]. China Coal,2014,40(4):41-44,92. doi: 10.3969/j.issn.1006-530X.2014.04.013 [4] 翟晓荣,吴基文,王广涛,等. 基于MODFLOW的闭坑矿井水位回升预测[J]. 煤田地质与勘探,2018,46(增刊1):27-32.ZHAI Xiaorong,WU Jiwen,WANG Guangtao,et al. MODFLOW-based groundwater rebound forecast in abandoned coal mine[J]. Coal Geology & Exploration,2018,46(S1):27-32. [5] 刘国林,段绪华. 老空、老窑水的充水特征及防治对策[J]. 中国煤炭,2004,30(3):34-35,54. doi: 10.3969/j.issn.1006-530X.2004.03.012LIU Guolin,DUAN Xuhua. Water-filling characteristics of gob water and goaf water and its control measures[J]. China Coal,2004,30(3):34-35,54. doi: 10.3969/j.issn.1006-530X.2004.03.012 [6] 魏久传,肖乐乐,牛超,等. 2001—2013年中国矿井水害事故相关性因素特征分析[J]. 中国科技论文,2015,10(3):336-341,369. doi: 10.3969/j.issn.2095-2783.2015.03.019WEI Jiuchuan,XIAO Lele,NIU Chao,et al. Characteristics analysis of the correlation factors of China mine water hazard accidents in 2001-2013[J]. China Sciencepaper,2015,10(3):336-341,369. doi: 10.3969/j.issn.2095-2783.2015.03.019 [7] 郭彦华. 老空水水害事故原因分析及防治措施研究[J]. 中国安全科学学报,2006,16(10):141-144,1. doi: 10.3969/j.issn.1003-3033.2006.10.025GUO Yanhua. Cause analysis of flooding accidents caused by goaf water and study on their countermeasures[J]. China Safety Science Journal,2006,16(10):141-144,1. doi: 10.3969/j.issn.1003-3033.2006.10.025 [8] 董书宁. 对中国煤矿水害频发的几个关键科学问题的探讨[J]. 煤炭学报,2010,35(1):66-71.DONG Shuning. Some key scientific problems on water hazards frequently happened in China[J]. Journal of China Coal Society,2010,35(1):66-71. [9] 罗立平. 矿井老空水形成机制与防水煤柱留设研究[D]. 北京: 中国矿业大学（北京）, 2010.LUO Liping. Research on the form mechanism of goaf water and its waterproof coal pillar dimension problem in coal mine[D]. Beijing: China University of Mining & Technology（Beijing）, 2010. [10] 周建军. 废弃煤矿水位回升诱致邻矿突水威胁分析[J]. 煤矿安全,2013,44(7):166-168,171.ZHOU Jianjun. Risk analysis on adjacent mine water inrush caused by groundwater rebound of abandoned coal mine[J]. Safety in Coal Mines,2013,44(7):166-168,171. [11] 肖华,杨志洋,崔勤利,等. 闭坑矿井采空区积水对防水煤柱稳定性的影响[J]. 煤炭科技,2014,35(4):105-107. doi: 10.3969/j.issn.1008-3731.2014.04.044XIAO Hua,YANG Zhiyang,CUI Qinli,et al. Influence of ponding in goaf of closed pit mine on stability of waterproof coal pillar[J]. Coal Science & Technology Magazine,2014,35(4):105-107. doi: 10.3969/j.issn.1008-3731.2014.04.044 [12] 尹会永,魏久传,王怀文,等. 基于数值模拟的矿井人为边界煤柱留设研究[J]. 矿业安全与环保,2013,40(2):12-15. doi: 10.3969/j.issn.1008-4495.2013.02.006YIN Huiyong,WEI Jiuchuan,WANG Huaiwen,et al. Study on establishment of artificial mine boundary coal pillar based on numerical simulation[J]. Mining Safety & Environmental Protection,2013,40(2):12-15. doi: 10.3969/j.issn.1008-4495.2013.02.006 [13] 李振鲁,张文泉. 巷道防隔水煤(岩)柱留设研究[J]. 煤炭技术,2017,36(4):71-73.LI Zhenlu,ZHANG Wenquan. Study on waterproof coal( rock) pillar in roadway[J]. Coal Technology,2017,36(4):71-73. [14] 张文斌,吴基文,翟晓荣,等. 闭坑矿井矿界煤柱采动损伤及其安全性评价[J]. 工矿自动化,2020,46(2):39-44.ZHANG Wenbin,WU Jiwen,ZHAI Xiaorong,et al. Mining damage of mine boundary coal pillar in closed mine and its safety evaluation[J]. Industry and Mine Automation,2020,46(2):39-44. [15] 刘洋. 长壁留煤柱支撑法开采煤柱优化设计及破坏的可监测性研究[D]. 西安: 西安科技大学, 2006.LIU Yang. Study on optimization design and destruct monitoring character of coal pillar in longwall remaining coal pillar support mining[D]. Xi'an: Xi'an University of Science and Technology, 2006. [16] 国家煤矿安全监察局. 煤矿防治水细则[M]. 北京: 煤炭工业出版社, 2018.State Administration of Coal Mine Safety. Detailed rules for water prevention and control in coal mines[M]. Beijing: Coal Industry Press, 2018. -
点击查看大图
图(8) / 表(1)
计量
- 文章访问数: 128
- HTML全文浏览量: 20
- PDF下载量: 15
- 被引次数: 0
