开挖卸荷与回采动压叠加下沿空小煤柱巷道支护技术研究  

Study on support technology of gob-side entry with small coal pillar under excavation unloading and mining dynamic pressure

作　　者：杜孝杰 Du Xiaojie(Longtai Coal Industry,Jizhong Energy Xingkuang Group,Changzhi 046500,China)

机构地区：[1]冀中能源集团邢矿集团隆泰煤业,山西长治046500

出　　处：《煤炭与化工》2022年第5期1-5,共5页Coal and Chemical Industry

摘　　要：针对沿空小煤柱巷道易冒顶、大变形、难支护等问题,综合考虑掘、采全过程(巷道开挖与工作面回采)巷道围岩稳定性,基于典型矿井现场调研与围岩地质力学参数原位测试结果,综合运用理论分析、数值模拟及工程类比相结合的方法,进行了初始支护设计,开展现场工业性试验并进行日常与综合矿压监测,分析矿压监测数据、评估巷道稳定性、动态优化调整支护设计,最终探索出适用于沿空小煤柱巷道服务全过程的支护技术。应用结果表明,该技术可有效地控制小煤柱沿空巷道围岩强烈变形,巷道在掘进期间围岩整体未出现明显的大变形,两帮变形要明显高于顶底板变形且煤柱帮变形最大,可为相似地质条件的沿空巷道支护设计与安全高效生产提供可靠依据。Aiming at the problems of easy roof fall,large deformation and difficult support in the roadway with small coal pillars along goaf,the stability of surrounding rock in the whole process of excavation(roadway excavation and face mining)was comprehensively considered,based on the results of field investigation and in-situ measurement of geomechanical parameters of surrounding rock in a typical mine,a comprehensive method combining theoretical analysis,numerical simulation and engineering analogy was used,the initial support was designed.On-site industrial tests and daily and comprehensive monitoring of ground pressure were carried out.By analyzing ground pressure monitoring data,evaluating roadway stability,dynamically optimizing and adjusting support design,the supporting technology suitable for the whole service process of small coal pillar roadway along gob was explored.The application results showed that the technology effectively controlled the strong deformation of the surrounding rock of the roadway along the goaf with small coal pillar,and there was no obvious large deformation of the surrounding rock during the excavation of the roadway.The deformation of the two sides was significantly higher than that of the roof and floor,and the deformation of the coal pillar side was the largest,which provided a reliable basis for the support design and safe and efficient production of the roadway along the goaf with similar geological conditions.

关 键 词：开挖卸荷 回采动压 沿空小煤柱 巷道支护技术 

分 类 号：TD353[矿业工程—矿井建设]