煤岩巷道冲击破坏过程相似模拟试验研究  

Similar Simulation Experimental Study of Impact Failure Process of Coal Roadway

作　　者：吕祥锋[1,2] 王振伟 潘一山[1] 

机构地区：[1]辽宁工程技术大学力学与工程学院,辽宁阜新123000 [2]中国科学院力学研究所,北京100190 [3]中国煤炭科工集团沈阳研究院,辽宁抚顺113122

出　　处：《实验力学》2012年第3期311-318,共8页Journal of Experimental Mechanics

基　　金：国家重点基础研究发展规划(973计划)项目(2010CB226803);国家自然科学基金项目(50774046)

摘　　要：采用相似材料模拟试验研究方法,利用单轴加载系统和数字散斑光测技术,根据相似材料配比制备脆性材料,对标准试块和三维巷道模型进行了相似试验研究。对相似模拟试验结果分析可知,实验室制备脆性材料模拟冲击地压巷道破坏过程是可行的,冲击破坏特征较明显;散斑计算结果说明,试块位移和应变变化与裂缝出现、扩展和贯通具有一致性,且竖向裂缝开展数量多、速度快;相似模拟试验结果也表明巷道顶板受冲击作用和下沉位移较大,两边帮向巷道内部弯曲变形也较大,甚至出现煤岩抛出和巷道垮塌。本试验也为进一步揭示煤岩巷道冲击破坏规律提供了新的途径。Similar simulation experimental study of a standard test block and a three-dimensional coal roadway model made of brittle materials by the similar material ratio was carried out based on uniaxial loading system and digital speckle pattern measurement technology. The impact failure process of coal roadway was discussed. Results show that similar simulation for the impact failure process of roadway model made of brittle material in laboratory is feasible, and the impact failure characteristics are evident. Speckle results show that the model displacement and strain variation are consistent with the emergence, expansion and transfixion of cracks , and a large number of vertical crack appears fast. Experimental results also indicate that the roadway roof subsides a large displacement due to the intense impact loading, and the both sides of roadway present a large internal deformation, even the coal and rock are thrown out and roadway is collapsed. This study also provides a new method for further revealing the impact failure of rockburst.

关 键 词：冲击地压 煤岩巷道 破坏过程 相似试验 

分 类 号：TD324[矿业工程—矿井建设]