摘要
在复杂地质条件下,巷道围岩的变形问题是制约煤矿安全生产的一个重要挑战。以山阳煤矿为工程背景,探讨在“三软”煤层及复合砂岩顶板条件下的巷道围岩变形机制,以此提高巷道的围岩控制技术。采用现场试验,对巷道围岩的松动圈、顶底板及两帮的移近量进行了连续监测,结合3个测站总体情况,顶板松动最大范围达到了3.42 m,两帮最大松动范围为2.94 m,肩角处最大松动范围达到了3.56 m,揭示了围岩变形的主要影响范围和变形规律。根据巷道的变形特征,优化了巷道原支护方案的结构设计;通过数值模拟研究,对比分析了原支护及优化支护条件下的应力区及塑性区变形情况。研究结果表明,优化后的支护方式能有效地控制巷道的变形,为巷道的控制技术提供了参考。
Under complex geological conditions,the deformation of the surrounding rock in roadways is a significant challenge that restricts the safe production of coal mines.Taking Shanyang Coal Mine as the engineering background,this paper explores the deformation mechanism of the surrounding rock in roadways under the conditions of"three soft"coal seams and composite sandstone roof,aiming to improve the surrounding rock control technology of roadways.Field tests are conducted to continuously monitor the loosening zone of the surrounding rock,the approach of the roof and floor,and the two sides of the roadway Based on the overall situation of the three measurement stations,the maximum loosening range of the roof reached 3.42 m,the maximum loosening range of the two sides is 2.94 m,and the maximum loosening range at the shoulder angle reached 3.56 m,revealing the main influence range and deformation law of the surrounding rock.According to the deformation characteristics of the roadway,the structural design of the original support scheme of the roadway is optimized.Through numerical simulation studies,the deformation of the stress zone and plastic zone under the original support and optimized support conditions is compared and analyzed.The research results show that the optimized support method can effectively control the deformation of the roadway,providing a reference for the control technology of roadways.
作者
张富魁
任国胜
申阳平
ZHANG Fukui;REN Guosheng;SHEN Yangping(Shaanxi Chenghe Shanyang Coal Co.,Ltd.)
出处
《现代矿业》
2025年第11期232-236,242,共6页
Modern Mining
关键词
“三软”煤层
复合顶板
巷道支护
数值模拟
"three soft"coal seams
composite roof
roadway support
numerical simulation
