房柱式采空区部分充填关键参数设计方法研究

doi:10.11799/ce202603008

摘要/Abstract

摘要：

针对房柱式采空区全充填治理设计盲目、充填量大、治理费用高昂等问题，提出了不接顶充填与墩柱充填的部分充填设计方法，基于矩形煤柱受风化作用逐渐剥离以及剥离体堆积的特性，建立了房柱式采空区矩形煤柱剥离模型，计算出了矩形煤柱的最大剥离深度，采用煤柱极限强度安全系数法，基于煤柱与充填体的协同承载作用，推导了不接顶充填、墩柱充填方式的理论计算公式，可指导房柱式采空区部分充填治理设计，大幅度降低采空区治理费用。研究表明：充填体的设计强度参数（弹性模量、单轴抗压强度）与充填率呈反比例关系，可提高充填材料的弹性模量与单轴抗压强度来大幅度降低采空区充填量，降低治理成本。

关键词:

房柱式采空区, 煤柱剥离, 稳定性评价, 不接顶充填, 墩柱充填

Abstract:

In view of the blind design, large amount of filling and high cost of treatment in the room and pillar mining goaf, the partial filling design method of roof-uncontacted filling and pier column filling was put forward. Based on the characteristics of the rectangular coal pillar gradually peeled by weathering process and the accumulation of peeled bodies, the model of the rectangular coal pillar peeling in the room and pillar mining goaf was builded, and the maximum peeling depth of the rectangular coal pillar was calculated. Based on the collaborative bearing of coal pillar and backfill, the theoretical calculation formulas of backfill with roof-uncontacted filling and pier column filling were derived by using safety factor method for coal pillar ultimate strength. These formulas could guide the design of partial filling treatment of room pillar goaf and reduce the cost of goaf treatment greatly. The results showed that the design strength parameters (elastic modulus, uniaxial compressive strength) of the backfill were inversely proportional to the filling rate, so the elastic modulus and uniaxial compressive strength of the filling material could be increased to significantly reduce the filling volume in the goaf and the treatment cost.

中图分类号:

TD325

许刚刚.

房柱式采空区部分充填关键参数设计方法研究 [J]. 煤炭工程, 2026, 58(3): 61-68.

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