摘要
实体煤与小煤柱之间的回采巷道由于受非对称支承压力、小煤柱塑性变形及软弱底板等因素影响,非对称底鼓问题严峻,传统支护技术难以有效控制。针对该问题,综合运用理论分析、数值模拟与现场试验方法,分析应力分布特征,揭示非对称底鼓形成机制;提出切槽卸压控制技术,通过在巷道底板切割一定深度和宽度的槽体,将浅部高应力向卸压槽外的深部岩体转移,同时为浅部围岩提供变形释放空间,减少应力集中和变形能积累,从而有效抑制底鼓发生。通过理论计算得出巷道底板最大破坏深度为2.04 m,结合数值模拟确定了现场切槽卸压的最优参数。现场工业性试验结果表明,切槽卸压处较未切槽卸压处底鼓量下降了94.99%,验证了切槽卸压可以有效解决现场底鼓难题。
In mining roadways located between solid coal and small coal pillars,the problem of asymmetric floor heave is severe due to the influence of factors such as asymmetric support pressure,plastic deformation of small coal pillars,and weak floor strata.Traditional support technologies are difficult to effectively control this issue.To address this issue,a combination of theoretical analysis,numerical simulation,and field testing was employed to analyze the stress distribution characteristics and reveal the formation mechanism of asymmetric floor heave.A groove cutting pressure relief control technology was proposed,in which grooves of specific depth and width were cut into the roadway floor to transfer high shallow stress to the deep rock mass outside the pressure relief groove,while also providing deformation space for the shallow surrounding rock.This reduced stress concentration and the accumulation of deformation energy,thereby effectively suppressing floor heave.Theoretical calculations indicated that the maximum failure depth of the roadway floor was 2.04 m,and numerical simulations were used to determine the optimal parameters for field groove cutting.Industrial-scale field test results showed that the floor heave amount in the groove cutting pressure relief site was reduced by 94.99%compared to the non-grooved site,verifying that groove cutting pressure relief can effectively resolve the problem of floor heave in practice.
作者
黄雨童
臧传伟
白雍瑞
张帆
HUANG Yutong;ZANG Chuanwei;BAI Yongrui;ZHANG Fan(College of Energy and Mining Engineering,Shandong University of Science and Technology,Qingdao 266590,China;Zhenchengdi Mine,Shanxi Xishan Coal Power Group Co.,Ltd.,Taiyuan 030200,China;Hefei Kelan Information Technology Co.,Ltd.,Hefei 230022,China)
出处
《工矿自动化》
北大核心
2025年第6期141-149,共9页
Journal Of Mine Automation
基金
国家自然科学基金项目(52004145)
山东省自然科学基金项目(ZR2019MEE022,ZR2020QE119)。
关键词
回采巷道
非对称底鼓
切槽卸压
应力分布
切槽参数优化
mining roadway
asymmetric floor heave
groove cutting pressure relief
stress distribution
groove parameter optimization
作者简介
黄雨童(1999-),男,山西阳城人,硕士研究生,主要研究方向为矿山压力与岩层控制,E-mail:15235639656@163.com。
