Experimental study on dissolution effect and water purification mechanism of broken coal and rock mass in goaf
-
摘要: 开展地下水库采空区破碎煤岩体溶蚀作用及净水机理研究，是实现矿井地下水库安全高效运行的关键。本文以锦界煤矿31409工作面开采形成的地下水库为工程背景，选取采空区破碎煤岩体及去离子水进行污染物释放规律实验研究，分析了采空区破碎煤岩体溶蚀作用规律，探究了破碎煤岩体对水体特征影响机理，获得了破碎煤岩体在不同温度、风化条件下污染物释放规律，并分析了地下水库净水过程中的沉淀溶蚀作用。溶蚀作用及岩体中黏土矿物表面对可溶性有机质的吸附、沉淀作用等水岩作用决定了地下水库净水特征，在不同的时间范围里，溶蚀作用和吸附沉淀作用各自占主导作用，影响矿井水质。Abstract: Research on the dissolution effect and the water purification mechanism of fractured coal and rock mass in the goaf area of underground reservoir is the key to realizing the safe and efficient operation of underground reservoir in mine.This paper takes the underground water reservoir formed by the mining of 31409 working face in Jinjie coal mine as example, and selects the broken coal rock mass in the mining area and deionized water for the experimental study of pollutant release law.We analyse the law of dissolution action of broken coal rock mass in the mining area, and explore the mechanism of the influence broken coal rock mass exerts on the characteristics of the water body.We discover the law of pollutant release of broken coal rock mass under different temperature and weathering degrees, and analyse precipitation and dissolution that occurs during the water purification process in underground water reservoir.The water-rock interaction of dissolution, the adsorption and precipitation of clay mineral surfaces and soluble organic matter in the rock body constitute the water purification characteristics of the groundwater reservoir, with dissolution, adsorption and precipitation each playing a dominant role in influencing mine water quality at different time scales.
-
图 1 煤矿地下水库净水机理示意图
Figure 1. Schematic diagram of water purification mechanism of underground reservoir in coal mine
图 4 不同温度及风化程度下浸泡液Na+含量变化曲线
Figure 4. Change curve of Na+ content in soaking solution under different temperature and weathering degrees
图 5 不同温度及风化程度下浸泡液K+含量变化曲线
Figure 5. Change curve of K+ content in soaking solution under different temperature and weathering degrees
图 6 不同风化程度下浸泡液Ca2+含量变化曲线
Figure 6. Change curve of Ca2+ content in soaking solution under different weathering degrees
图 7 不同风化程度下浸泡液NO3-含量变化曲线
Figure 7. Change curve of NO3- content in soaking solution under different weathering degrees
图 8 不同风化程度下浸泡液SO42-含量变化曲线
Figure 8. Change curve of SO42- content in soaking solution under different weathering degrees
图 9 不同时间下矿井水总碱度和总硬度变化曲线
Figure 9. Variation curves of total alkalinity and total hardness for mine water at different times
表 1 矿井水主要离子浓度分析
Table 1. Analysis of main ion concentration in mine water
mg/L 水样 Fe3+ Al3+ NH3/NH4+ Na+ Ca+ Cl- SO42- HCO3- 离子浓度 0.51~0.66 0.04~0.05 0.387~0.439 172.65~184.94 210.5~278.2 42.1~52.1 475.1~495.1 141.3~160.4 
下载: 导出CSV
表 2 破碎煤岩体主要化学成分组成
Table 2. Main chemical composition of broken coal and rock mass
% 化学组分 SiO2 Al2O3 Fe2O3 CaO MgO Na2O K2O TiO2 P2O5 风化煤岩体 52.34 12.32 1.05 0.08 0.54 0.25 1.73 0.45 0.12 新鲜煤岩体 44.27 9.43 1.58 1.21 0.82 0.37 0.54 0.52 0.16
下载: 导出CSV
表 3 金属离子沉淀pH值
Table 3. Metal ions precipitation boundary pH
金属离子 pH值 开始沉淀 完全沉淀 Fe3+ 2.7 3.7 Al3+ 3.7 4.7 Cu2+ 4.4 6.4 Zn2+ 6.0 8.0 Fe2+ 7.6 9.6 Mg2+ 9.3 10.8 Ca2+ 8.0 12.0
下载: 导出CSV
-
[1] 顾大钊, 张勇, 曹志国. 我国煤炭开采水资源保护利用技术研究进展[J]. 煤炭科学技术, 2016, 44(1): 1-7. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ201601001.htmGu Dazhao, Zhang Yong, Cao Zhiguo. Technical progress of water resource protection and utilization by coal mining in China[J]. Coal Science and Technology, 2016, 44(1): 1-7. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ201601001.htm [2] 顾大钊, 李庭, 李井峰, 等. 我国煤矿矿井水处理技术现状与展望[J]. 煤炭科学技术, 2021, 49(1): 11-18. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ202101002.htmGu Dazhao, Li Ting, Li Jingfeng, et al. Current status and prospects of coal mine water treatment technology in China[J]. Coal Science and Technology, 2021, 49(1): 11-18. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ202101002.htm [3] 王方田, 张村, 周保精. 生态脆弱矿区地下水库煤柱坝体损伤机理及控制[M]. 徐州: 中国矿业大学出版社, 2022. [4] 张村, 韩鹏华, 王方田, 等. 采动水浸作用下矿井地下水库残留煤柱稳定性[J]. 中国矿业大学学报, 2021, 50(2): 220-227, 247. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD202102003.htmZhang Cun, Han Penghua, Wang Fangtian, et al. The stability of residual coal pillar in underground reservoir with the effect of mining and water immersion[J]. Journal of China University of Mining & Technology, 2021, 50(2): 220-227, 247. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGKD202102003.htm [5] 谢和平, 高明忠, 刘见中, 等. 煤矿地下空间容量估算及开发利用研究[J]. 煤炭学报, 2018, 43(6): 1487-1503. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201806001.htmXie Heping, Gao Mingzhong, Liu Jianzhong, et al. Research on exploitation and volume estimation of underground space in coal mines[J]. Journal of China Coal Society, 2018, 43(6): 1487-1503. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201806001.htm [6] 顾大钊, 李井峰, 曹志国, 等. 我国煤矿矿井水保护利用发展战略与工程科技[J]. 煤炭学报, 2021, 46(10): 3079-3089. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB202110001.htmGu Dazhao, Li Jingfeng, Cao Zhiguo, et al. Technology and engineering development strategy of water protection and utilization of coal mine in China[J]. Journal of China Coal Society, 2021, 46(10): 3079-3089. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB202110001.htm [7] 顾大钊. 煤矿地下水库理论框架和技术体系[J]. 煤炭学报, 2015, 40(2): 239-246. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201502001.htmGu Dazhao. Theory framework and technological system of coal mine underground reservoir[J]. Journal of China Coal Society, 2015, 40(2): 239-246. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201502001.htm [8] 孙亚军, 徐智敏, 李鑫, 等. 我国煤矿区矿井水污染问题及防控技术体系构建[J]. 煤田地质与勘探, 2021, 49(5): 1-16. https://www.cnki.com.cn/Article/CJFDTOTAL-MDKT202105001.htmSun Yajun, Xu Zhimin, Li Xin, et al. Mine water drainage pollution in China's coal mining areas and the construction of prevention and control technical system[J]. Coal Geology & Exploration, 2021, 49(5): 1-16. https://www.cnki.com.cn/Article/CJFDTOTAL-MDKT202105001.htm [9] 李文平, 李涛, 陈伟, 等. 采空区储水: 干旱区保水采煤新途径[J]. 工程地质学报, 2014, 22(5): 1003-1007. https://www.cnki.com.cn/Article/CJFDTOTAL-GCDZ201405037.htmLi Wenping, Li Tao, Chen Wei, et al. Goaf water storage: a new way for water preserved mining in arid areas[J]. Journal of Engineering Geology, 2014, 22(5): 1003-1007. https://www.cnki.com.cn/Article/CJFDTOTAL-GCDZ201405037.htm [10] 李鑫, 孙亚军, 陈歌, 等. 高矿化度矿井水深部转移存储介质条件及影响机制[J]. 煤田地质与勘探, 2021, 49(5): 17-28. https://www.cnki.com.cn/Article/CJFDTOTAL-MDKT202105002.htmLi Xin, Sun Yajun, Chen Ge, et al. Medium conditons and influence mechanism of high salinity mine water transfer and storage by deep well recharge[J]. Coal Geology & Exploration, 2021, 49(5): 17-28. https://www.cnki.com.cn/Article/CJFDTOTAL-MDKT202105002.htm [11] 王甜甜, 靳德武, 杨建. 内蒙古某矿矿井水重金属污染特征及来源分析[J]. 煤田地质与勘探, 2021, 49(5): 45-51. https://www.cnki.com.cn/Article/CJFDTOTAL-MDKT202105005.htmWang Tiantian, Jin Dewu, Yang Jian. Heavy metal pollution characteristics and source analysis of water drainage from a mine in Inner Mongolia[J]. Coal Geology & Exploration, 2021, 49(5): 45-51. https://www.cnki.com.cn/Article/CJFDTOTAL-MDKT202105005.htm [12] Goren O, Gavrieli I, Burg A, et al. Cation exchange and CaCO3 dissolution during artificial recharge of effluent to a calcareous sandstone aquifer[J]. Journal of Hydrology, 2011, 400(1/2): 165-175. [13] Marcon V, Joseph C, Carter K E, et al. Experimental insights into geochemical changes in hydraulically fractured Marcellus Shale[J]. Applied Geochemistry, 2017, 76: 36-50. doi: 10.1016/j.apgeochem.2016.11.005 [14] Redwan M, Abdel Moneim A A, Amra M A. Effect of water-rock interaction processes on the hydrogeochemistry of groundwater west of Sohag area, Egypt[J]. Arabian Journal of Geosciences, 2016, 9(2): 111. doi: 10.1007/s12517-015-2042-x [15] MePKYAOB B A, 尉然. 矿井水及其净化方法[J]. 煤矿环境保护, 1988, 2(1): 19-27, 30. https://www.cnki.com.cn/Article/CJFDTOTAL-NYBH198803009.htmMePKYAOB B A, Yu Ran. Mine water and its purification method[J]. Energy Environmental Protection, 1988, 2(1): 19-27, 30. https://www.cnki.com.cn/Article/CJFDTOTAL-NYBH198803009.htm [16] 石旭飞, 王寒梅, 焦珣, 等. 人工回灌条件下的水岩作用室内实验研究[J]. 上海国土资源, 2012, 33(2): 21-24, 73. https://www.cnki.com.cn/Article/CJFDTOTAL-SHAD201202008.htmShi Xufei, Wang Hanmei, Jiao Xun, et al. Experimental study of water-rock interaction during artificial recharge[J]. Shanghai Land & Resources, 2012, 33(2): 21-24, 73. https://www.cnki.com.cn/Article/CJFDTOTAL-SHAD201202008.htm [17] 张庆, 罗绍河, 赵丽, 等. 有机氮和"三氮"在西部煤矿区地下水库迁移转化的实验研究[J]. 煤炭学报, 2019, 44(3): 900-906. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201903028.htmZhang Qing, Luo Shaohe, Zhao Li, et al. Migration and transformation regulation of organic and inorganic nitrogen in a western coal mine groundwater reservoir[J]. Journal of China Coal Society, 2019, 44(3): 900-906. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201903028.htm [18] 于妍, 陈薇, 曹志国, 等. 煤矿地下水库矿井水中溶解性有机质变化特征的研究[J]. 中国煤炭, 2018, 44(10): 168-173. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGME201810039.htmYu Yan, Chen Wei, Cao Zhiguo, et al. Research on change features on dissolved organic matter of mine water in coal mine's underground reservoir[J]. China Coal, 2018, 44(10): 168-173. https://www.cnki.com.cn/Article/CJFDTOTAL-ZGME201810039.htm [19] 张凯, 高举, 蒋斌斌, 等. 煤矿地下水库水-岩相互作用机理实验研究[J]. 煤炭学报, 2019, 44(12): 3760-3772. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201912017.htmZhang Kai, Gao Ju, Jiang Binbin, et al. Experimental study on the mechanism of water-rock interaction in the coal mine underground reservoir[J]. Journal of China Coal Society, 2019, 44(12): 3760-3772. https://www.cnki.com.cn/Article/CJFDTOTAL-MTXB201912017.htm [20] 王方田, 梁宁宁, 李岗, 等. 复杂应力环境煤柱坝体损伤破坏规律研究[J]. 采矿与安全工程学报, 2019, 36(6): 1145-1152. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201906010.htmWang Fangtian, Liang Ningning, Li Gang, et al. Failure evolution mechanism of coal pillar dams in complex stress environment[J]. Journal of Mining & Safety Engineering, 2019, 36(6): 1145-1152. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL201906010.htm [21] 乔小娟, 李国敏, 周金龙, 等. 采煤对地下水资源与环境的影响分析: 以山西太原西山煤矿开采区为例[J]. 水资源保护, 2010, 26(1): 49-52. https://www.cnki.com.cn/Article/CJFDTOTAL-SZYB201001013.htmQiao Xiaojuan, Li Guomin, Zhou Jinlong, et al. Analysis of influence of coal exploitation on water resources and environment: a case study of coal exploitation in Xishan of Taiyuan City[J]. Water Resources Protection, 2010, 26(1): 49-52. https://www.cnki.com.cn/Article/CJFDTOTAL-SZYB201001013.htm [22] 刘成禹, 何满潮. 对岩石风化程度敏感的化学风化指数研究[J]. 地球与环境, 2011, 39(3): 349-354. https://www.cnki.com.cn/Article/CJFDTOTAL-DZDQ201103012.htmLiu Chengyu, He Manchao. Research on the sensitive chemical weathering indices to rock weathering[J]. Earth and Environment, 2011, 39(3): 349-354. https://www.cnki.com.cn/Article/CJFDTOTAL-DZDQ201103012.htm [23] 智国军, 鞠金峰, 刘润, 等. 水岩相互作用对煤矿地下水库水质影响机理研究[J]. 采矿与安全工程学报, 2022, 39(4): 779-785. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL202204015.htmZhi Guojun, Ju Jinfeng, Liu Run, et al. Water-rock interaction and its influence on water quality in the underground reservoir[J]. Journal of Mining & Safety Engineering, 2022, 39(4): 779-785. https://www.cnki.com.cn/Article/CJFDTOTAL-KSYL202204015.htm [24] 房满义, 李雪妍, 张根, 等. 煤矿地下水库水岩作用机理研究: 以大柳塔煤矿为例[J]. 煤炭科学技术, 2022, 50(11): 236-242. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ202211028.htmFang M Y, Li X Y, Zhang G, et al. Research on water-rock interaction mechanism in coal mine underground reservoir—taking Daliuta Coal Mine as an example[J]. Coal Science and Technology, 2022, 50(11): 236-242. https://www.cnki.com.cn/Article/CJFDTOTAL-MTKJ202211028.htm -
点击查看大图
图(9) / 表(3)
计量
- 文章访问数: 179
- HTML全文浏览量: 24
- PDF下载量: 21
- 被引次数: 0