预充填无煤柱开采墙体合理参数研究  

Reasonable parameters for pre-filling and non-pillar mining walls

作　　者：王兵建[1,2] 王亚斌 刘煜成 郭佳鑫 WANG Bingjian;WANG Yabin;LIU Yucheng;GUO Jiaxin(School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454003,China;Collaborative Innovation Center of Coal Work Safety,Henan Province,Henan Polytechnic University,Jiaozuo,454003,China)

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454003 [2]河南理工大学煤炭安全生产河南省协同创新中心,河南焦作454003

出　　处：《煤炭工程》2025年第3期11-17,共7页Coal Engineering

基　　金：国家自然科学基金项目(52274077)。

摘　　要：为从根本上解决传统沿空留巷施工过程中留巷与回采作业之间的相互干扰问题,提高乌兰色太煤矿盘区煤炭资源回收率,提出巷内预充填无煤柱掘留巷技术。在分析巷内预充填无煤柱掘留巷技术原理的基础上,建立预充填回采巷道力学模型,利用数值模拟软件,分析不同墙体宽度下预留巷围岩变形特征。数值计算得出预充填墙体切顶所需支护阻力为19.2 MPa,预充填墙体合理宽度范围为0.14~2.58 m。模拟结果显示,在墙体宽度由1.0 m增加至3.0 m过程中,随着墙体宽度的增加,墙体支护刚度逐渐增大,产生“集硬效应”,使墙体承载的载荷增大;墙体向巷内偏移量和预留巷围岩整体变形量都得到改善,改善效果随着宽度的增大而减弱。综合考虑墙体承载安全系数和断面使用要求,最终确定预充填墙体宽度为2.0 m,混凝土充填材料强度选用C25,现场实践验证了选用参数的合理性。In order to fundamentally solve the interference between the traditional goaf supporting construction process and the mining operation,and improve the coal recovery rate in the mine area of Wulan Setai Coal Mine,we proposed the in-roadway pre-filling and non-pillar mining and entry retaining technology.On the basis of analyzing the principle of the technology,a mechanical model was established.It is calculated that the support resistance required to cut the upper part of the goaf-filling wall is 19.2 MPa,and the reasonable width range of the goaf-filling wall is 0.14~2.58 m.Numerical simulation results indicate that during the process of increasing the wall width from 1.0 m to 3.0 m,the supporting stiffness of the wall gradually increases along with the width,resulting in a “consolidation hardening effect” that enhances the load-bearing capacity of the wall.Both the deviation of the wall towards the roadway and the overall deformation of the surrounding rock of the reserved tunnel show improvements,albeit with a diminished effect as the width increases.After comprehensive consideration of the wall support safety factor and the practical requirements of the section,the width of the pre-filled wall was determined as 2.0 meters,with a choice of C25 grade concrete for the backfilling material.Field practice has confirmed the rationality of the selected parameters.

关 键 词：预充填 无煤柱掘巷 合理宽度 回采巷道 数值模拟 

分 类 号：TD353[矿业工程—矿井建设]