高级检索

中原矿粮复合区耕地采动损毁特征与控制修复技术

Characteristics and control–restoration technologies for mining-induced farmland damage in the central plains mine–agriculture composite region

  • 摘要: 中原地区煤炭资源与优质耕地在空间上高度重叠,煤矿开采诱发的耕地裂缝发育、沉陷积水、坡度变化与土壤退化等问题严重制约了煤炭开采与耕地保护的协调发展。系统梳理中原矿粮复合区耕地采动损毁特征与控制修复技术对推动矿粮复合区绿色减损开采具有重要意义。围绕“三软”厚煤层、巨厚松散层薄基岩和多煤层赋存三类典型地质采矿条件,梳理总结了覆岩破坏与地表移动变形规律,对矿粮复合区耕地拉张裂缝、沉陷盆地、坡度变化与土壤退化等采动损毁特征进行了总结归纳。在此基础上,从地表修复、覆岩控制与井下减沉三个方面综述了相关技术的研究现状与应用情况,并从评价指标与评价方法两方面对耕地损毁评价体系进行总结分析。对未来研究方向进行了展望。综述结果表明:中原矿粮复合区耕地损毁特征受地质采矿条件影响明显,土壤退化呈物理损伤,生物活性下降,到化学性质改变逐渐演化的规律;现有耕地损毁控制理念由单一修复方式向多种、多层面减损控制转变,技术组合的针对性与系统性持续增强;“边采边复”、覆岩离层注浆减沉技术等技术在修复耕地损毁、减缓地表沉陷方面具有较好效用,已成为矿粮复合区绿色减损开采的研究热点;现有研究多采用形变与水文指标界定损毁程度,为分级治理提供了参考依据。此外,不同地质采矿条件下采动覆岩的破坏与地表损毁的差异,以及减损开采技术的适配与效果评价问题加剧了中原地区采动损毁与控制的研究难度。未来仍需围绕不同地质采矿条件下减损技术适配优化、覆岩离层注浆参数精细化设计与防渗优化,绿色固废基浆材研发、区域耕地损毁动态评价等关键问题开展系统深入研究,以进一步提升矿粮复合区耕地保护与绿色减损开采的理论水平。

     

    Abstract: In the Central Plains mine–agriculture composite region, extensive overlap of coal resources and high-quality farmland has led to mining-induced farmland fissures, subsidence waterlogging, slope changes, and soil degradation, hindering coordinated coal extraction and farmland protection. To support green mining with reduced land damage, this review summarizes the characteristics and control technologies of mining-induced farmland damage. Three typical geological and mining conditions are considered: thick coal seams with “three-soft” strata, thin bedrock overlain by extremely thick unconsolidated layers, and multiple-seam occurrence. Overburden failure, surface movement and deformation, and farmland damage features (tensile fissures, subsidence basins, slope changes, soil degradation) are analyzed. The results indicate that farmland damage is strongly controlled by geological and mining conditions. Soil degradation typically progresses from physical structural damage and reduced biological activity to chemical property changes. Farmland damage control has evolved from sole post-mining restoration to multi-level damage reduction integrating surface restoration, overburden control, and underground subsidence reduction. Concurrent mining and reclamation and overburden separation grouting have been applied for farmland restoration and subsidence mitigation. Damage degrees are currently classified mainly using surface deformation and hydrological indicators to guide graded management. Overburden failure and surface damage differ significantly under different conditions, while the adaptability and effectiveness evaluation of damage-reduction mining technologies remains insufficient, limiting effective control of farmland damage. Further research should target technology matching, refined design of grouting parameters for overburden separation, seepage prevention, green solid-waste-based grouting materials, and dynamic regional farmland damage assessment, to improve the theoretical basis for farmland protection and green damage-reduction mining in mine–agriculture composite regions.

     

/

返回文章
返回