煤岩巷道爆破开挖围岩松动破碎研究  

Study on Loose Fracture of Surrounding Rock Using Blasting Method in Coal Rock Roadway

作　　者：张朝晖[1,2] 师百垒[1,3] 李宗利 王敏[1] 

机构地区：[1]杨凌职业技术学院交通与测绘工程分院,陕西杨凌712100 [2]西北农林科技大学水利与建筑工程学院,陕西杨凌712100 [3]西安科技大学建筑与土木工程学院,西安710054

出　　处：《煤矿机械》2018年第1期37-40,共4页Coal Mine Machinery

基　　金：国家自然科学基金项目(51379178)

摘　　要：为了进一步控制煤岩巷道爆破开挖质量,减小爆破开挖对围岩的破坏程度,对雅典煤矿回风巷道煤岩体力学性质进行分析,利用电子内窥摄像仪观察围岩破碎状况,并建立模型研究不同参数下爆破应力在围岩中传播及分布状况。结果表明:煤岩体强度较小,具有明显的力学薄弱向;煤岩巷道围岩破碎特性明显,纵向裂缝凸出;在一定工程条件下爆破应力在围岩中的传播规律相似;不同的爆破参数对爆破振动具有一定影响,存在最佳理论爆破参数值,使爆破围岩振动达到最弱。In order to further control the quality of blasting excavation in coal rock roadway, reduce the degree of damage to the surrounding rock by blasting, analyse the mechanical properties of coal rock mass in the backwind tunnel of Yadian coal mine, observe the fracture condition of surrounding rock by electronic endoscopic camera,and build model to study the distribution and distribution of blasting stress in surrounding rock under different parameters. The results show that the strength of coal rock mass is small, with obvious mechanical weakness; the fracture characteristics of the surrounding rock of coal roadway are obvious and the longitudinal cracks protrude; the distribution of blasting stress in surrounding rock is similar in certain engineering conditions; the different blasting parameters have some influence on the blasting vibration, and the optimal theoretical blasting parameters are present, the vibration of surrounding rock is the weakest.

关 键 词：煤岩体 爆破振动 围岩破碎 爆破参数 

分 类 号：TD31[矿业工程—矿井建设]