矿业科学学报2026，Vol.11Issue(2)：392-402,11.DOI:10.19606/j.cnki.jmst.2026004
冲击载荷下垮落带裂隙岩体碎胀与储水特征
Fragmentation expansion and water storage characteristics of fractured rock in caving zones under impact loading
摘要
Abstract
This study investigates the fragmentation expansion and water storage characteristics of col-lapsed rock in overlying strata during its formation.Pre-static loaded fractured samples of four typical roof rock types-coarse sandstone,fine sandstone,sandy mudstone,and mudstone-were tested for their water storage coefficients under 10-30 J of impact energy.Specifically,we analyzed their fragmentation expansion and water storage structures,along with their fractal dimensions.Results show that rock sam-ples exhibited further expansion of their water storage spaces under the impact,forming a"skeleton-network"composite structure.Their fractal dimension ranged between 1.59-2.16,and their average block size between 30.19-35.19 mm.Under identical impact energy,the degree of fragmentation ex-pansion and water storage coefficient decreased sequentially from mudstone,coarse sandstone,fine sandstone to sandy mudstone due to differences in their impact resistance.With rising impact energy,these four rock types showed significant increase in their fragmentation expansion and water storage co-efficients after impact,It demonstrated a"gentle growth,rapid rise,gentle growth"pattern,as was described by a logistic model.There is a strong correlation between the water storage coefficient,fractal dimension,and average block size of rock samples under different impact disturbances,indicating that water storage coefficient is governed by the synergistic effect of fractal dimension and average block size.This study thus constructed a formula for predicting water storage coefficient based on fractal di-mension and average block size,which offers new insights for predicting water storage space of under-ground reservoirs.关键词
地下水库/裂隙岩体/冲击扰动/碎胀特性/储水系数Key words
underground reservoir/fractured rock/impact disturbance/fragmentation expansion char-acteristics/water storage coefficient分类
矿业与冶金引用本文复制引用
方杰,张冰,吴宝杨,王汉鹏,窦柳洋,王路军,王鹏..冲击载荷下垮落带裂隙岩体碎胀与储水特征[J].矿业科学学报,2026,11(2):392-402,11.基金项目
国家科技重大专项(2024ZD1700100) （2024ZD1700100）
国家自然科学基金(52204096) （52204096）
煤炭开采水资源保护与利用全国重点实验室开放基金(WPUKFJJ2019-07) （WPUKFJJ2019-07）
山东省自然科学基金(ZR2022QE031) （ZR2022QE031）
