韩磊，薛世瑞，尹大伟，等. 带压氯盐矿井水侵蚀下膏体充填体试样组构演化特性及损伤劣化机理研究［J］. 河南理工大学学报（自然科学版）， DOI:10.16186/j.cnki.1673-9787. 2026010018

Han L, Xue S R, Yin D W, et al. Study on the fabric evolution characteristics and damage degradation mechanism of paste filling body samples under the erosion of well water in chloride salt mine under pressure［J］. Journal of Henan Polytechnic University（Natural Science），

带压氯盐矿井水侵蚀下膏体充填体试样组构演化特性及损伤劣化机理研究

韩磊¹，薛世瑞²，尹大伟²，李宗蓄³，马世波⁴，张志伟⁴

（1.山煤国际能源集团股份有限公司，山西 太原，030000；2.山东科技大学 矿山灾害预防控制省部共建国家重点实验室培育基地，山东 青岛 266590；3.中国石油大学 石油工程学院，山东 青岛 266580；4.山西霍尔辛赫煤业有限责任公司，山西 长治 046000）

摘要: [目的] 针对关闭矿井采空区环境下膏体充填体长期受带压氯盐矿井水浸泡作用的问题，开展氯离子侵蚀下膏体充填体组构演化规律与损伤劣化机理研究。 [方法] 采用室内侵蚀试验与机理分析相结合、宏观试验与细观分析相结合的方法，开展了膏体充填体试样在不同水压下（0，0.5，1.5，3.0 MPa）氯盐矿井水浸泡（浸泡龄期为150 d）试验，研究了膏体充填体的细观形貌特征、氯离子渗透规律、水化产物及力学性能，分析了膏体充填体力学性能劣化机理。[结果] 研究表明：(1)膏体充填体试样单轴抗压强度随浸泡压力增加呈减小趋势。同一取样深度处，高水压浸泡下试样内部氯离子含量较低水压条件更高。(2)膏体充填体孔隙率、试样微裂隙与盐蚀产物随浸泡压力增加呈增大趋势，膏体充填体试样内部结构更为疏松，盐蚀产物增多、水泥水化产物减少。氯化钠（NaCl）和弗里德尔盐（Friedel’s盐）衍射峰随取样深度增加，强度降低并逐渐消失，随着浸泡压力增大，其衍射峰强度增强。(3)随浸泡压力增大，充填体内部微裂纹、孔隙加速扩展；同时生成的Friedel’s盐及试样孔壁或水化硅酸钙(C-S-H)凝胶吸附的氯离子积聚增多、结晶膨胀，促使试样微孔隙发育，二者协同作用降低膏体充填体试样力学强度。 [结论] 研究对带压氯盐矿井水侵蚀下膏体充填体长期稳定具有重要意义。

关键词: 膏体充填体；水压-氯盐；力学特性；结构演化；劣化机理

中图分类号：TD513

DOI: 10.16186/j.cnki.1673-9787. 2026010018

基金项目: 国家自然科学基金资助项目(52274128，52574153)；泰山学者工程专项经费资助项目(tsqn202306199)

收稿日期：2026-01-18

修回日期：2026-08-27

网络首发日期：2026-09-30

Study on the fabric evolution characteristics and damage degradation mechanism of paste filling body samples under the erosion of well water in chloride salt mine under pressure

Han Lei¹, Xue Shirui²,Yin Dawei², Li Zongxu³, Ma Shibo⁴,Zhang Zhiwei⁴

（1.Shanxi Coal International Energy Group Co., Ltd., Taiyuan 030000, Shanxi, China；2.State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, Shandong, China；3.School of Petroleum Engineering, China University of Petroleum (East China), Qingdao, Shandong 266580, China；4.Shanxi Huoerxinhe Coal Industry Co., Ltd., Changzhi 046000, Shanxi, China ）

Abstract: [Objective] Aiming at the problem that paste backfill in goaf of closed mines is subjected to long-term immersion of pressured chloride mine water, this study investigates the fabric evolution law and damage degradation mechanism of paste backfill under chloride ion erosion.[Methods]Using the combination of indoor erosion test and mechanism analysis, macroscopic test and microscopic analysis, the test of paste filling body samples soaked in chloride mine water (soaking age of 150 days) under different water pressures (0,0.5,1.5,3.0 MPa) was carried out. The microscopic morphology characteristics, chloride ion penetration law, hydration products and mechanical properties of paste filling body were studied, and the deterioration mechanism of mechanical properties of paste filling body was analyzed.[Results] The results show that :(1) The uniaxial compressive strength of the paste backfill samples was found to decrease with the increase of soaking pressure. At the same sampling depth, the chloride ion content in the samples immersed under high water pressure was higher than that under low water pressure. (2) The porosity of the paste filling body, the micro-cracks of the sample and the salt corrosion products increase with the increase of the soaking pressure. The internal structure of the paste filling body sample is more loose, the salt corrosion products increase, and the cement hydration products decrease. The diffraction peaks of sodium chloride (NaCl) and Friedel’s salt (Friedel’s salt) were decreased and gradually disappeared with the increase of sampling depth, and the diffraction peak intensity was increased with the increase of soaking pressure. (3) With the increase of soaking pressure, the microcracks and pores inside the filling body were accelerated. At the same time, the generated Friedel’s salt and the chloride ions adsorbed by the pore wall of the sample or the hydrated calcium silicate (C-S-H) gel were accumulated and expanded, which promoted the development of micropores in the sample. The synergistic effect of the two was found to reduce the mechanical strength of the paste filling sample. [Conclusion] This research was of great significance for the long-term stability of paste backfill under water erosion in pressurized chloride salt mines.

Key words: cemented paste backfill; water pressure-chloride salt; mechanical properties; structural evolution; degradation mechanism

CLC: