强采动大采高厚砂岩组顶板围岩破坏特征及
稳控机理研究

金属矿山 ›› 2025, Vol. 54 ›› Issue (9): 47-56.

强采动大采高厚砂岩组顶板围岩破坏特征及稳控机理研究

王国强¹ 　朱　帅¹ 　赵泽泽¹ 　陈　梁^2,3 　孔　正³

1. 榆林市榆神煤炭榆树湾煤矿有限公司,陕西榆林 719000;2. 中国矿业大学煤炭精细勘探与智能开发全国重点实验室,江苏徐州 221116;3. 中国矿业大学矿业工程学院,江苏徐州 221116

出版日期:2025-09-15 发布日期:2025-09-30
通讯作者: 陈　梁(1989—),男,副研究员,博士,硕士研究生导师。
作者简介:王国强(1988—),男,高级工程师。
基金资助:
国家自然科学基金项目(编号:52104100)。

Study on the Failure Characteristics and Stability Control Mechanism of the Surrounding Rock of the Roof in Large High-thickness Sandstone Formations Driven by Strong Mining

WANG Guoqiang ¹ 　 ZHU Shuai ¹ 　 ZHAO Zeze ¹ 　 CHEN Liang ^2,3　 KONG Zheng ³

1. Yulin Yushen Coal Yushuwan Coal Mine Co. ,Ltd. ,Yulin 719000,China; 2. State Key Laboratory for Fine Exploration and Intelligent Development of Coal Resources,China University of Mining and Technology,Xuzhou 221116,China;3. School of Mines,China University of Mining and Technology,Xuzhou 221116,China

Online:2025-09-15 Published:2025-09-30

摘要/Abstract

摘要： 为解决强采动大采高厚砂岩组顶板围岩片帮失稳难题,以榆树湾 20113 工作面回风顺槽煤柱片帮控制为例,总结分析片帮破坏特征及主控影响因素,给出了基于 MATLAB 图像处理技术的钻孔裂隙分形维数破裂度定量表征方法,对比模拟研究了 4 种不同优化支护方案下的围岩位移场演化规律,针对性提出了以“强力控顶、高阻护帮、斜拉工字钢+锚网耦合控表”为核心的煤柱片帮控制方法,并进行了现场工业性试验。研究结果表明:① 片帮类型多样(高帮楔体削落型+中部鼓帮型+“S”形)、破坏深度广、支护锚固失效严重是煤柱片帮的主要特征;② 厚砂岩组叠加效应、煤体强度低、矿压显现异常及柱体压杆效应显著是诱发煤柱片帮的主控因素;③ “液压支架工作阻力强化+锚网索+锚索工字钢梁”联合支护技术为最优支护方案,采用该方案后巷道顶底板及两帮移近量仅分别为 143 mm 和 181 mm,相较于原支护方案分别降低了 70%与 72%,松动圈范围为 0. 524~ 0. 613 m,煤柱表面无较大开裂裂纹,锚固煤体完整程度大幅提高,支护效果良好,有效解决了大采高厚砂岩组顶板围岩片帮失稳难题。

Abstract: To address the instability issues associated with coal pillar spalling in thick sandstone roof strata under high mining heights,this study focuses on the control of coal pillar spalling in the 20113 return airway of the Yushuwang Mine as a case study. The characteristics of spalling failure and the primary influencing factors are analyzed. A quantitative characterization method for fracture degree based on the fractal dimension of borehole fractures,using MATLAB image processing technology,is presented. The evolution of the surrounding rock displacement field under four different optimized support schemes is comparatively simulated. A coal pillar spalling control method,centered on " strong roof control,high-resistance rib protection, and inclined I-beam + anchor net coupling control," is proposed and implemented through industrial field tests. The research findings indicate that:① The primary characteristics of coal pillar spalling include diverse failure modes (high-rib wedge spalling + mid-section rib bulging + S-shaped),extensive failure depth,and severe support anchorage failure. ② The superposition effect of thick sandstone strata,low coal strength,abnormal mine pressure manifestation,and significant pillar compression rod effect are the dominant factors inducing coal pillar spalling. ③ The combined support technology of " hydraulic support working resistance enhancement + anchor net cable + anchor cable I-beam" is the optimal support scheme. After adopting this scheme, the convergence of the roadway roof,floor,and ribs were only 143 mm and 181 mm,respectively,representing reductions of 70% and 72% compared to the original support scheme. The loosened zone ranged from 0. 524 m to 0. 613 m,with no significant cracking on the coal pillar surface,and a substantial improvement in the integrity of the anchored coal body. The support effect was favorable,effectively resolving the instability issues of coal pillar spalling in thick sandstone roof strata under high mining heights.

Key words: thick sandstone group,coal pillar slope,fractal dimension,numerical simulation,support optimization

中图分类号:

TD353

王国强　朱　帅　赵泽泽　陈　梁, 　孔　正. 强采动大采高厚砂岩组顶板围岩破坏特征及稳控机理研究 [J]. 金属矿山, 2025, 54(9): 47-56.

WANG Guoqiang 　 ZHU Shuai 　 ZHAO Zeze 　 CHEN Liang , 　 KONG Zheng . Study on the Failure Characteristics and Stability Control Mechanism of the Surrounding Rock of the Roof in Large High-thickness Sandstone Formations Driven by Strong Mining [J]. Metal Mine, 2025, 54(9): 47-56.

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