煤柱过渡区的应力迁移与冲击矿压显现特征  

Stress migration and strata pressure behavior law in transitional region of coal pillar

作　　者：张少杰[1] 王金安[1] 魏现昊[1] 

机构地区：[1]北京科技大学金属矿山高效开采与安全教育部重点实验室,北京100083

出　　处：《中国矿业》2013年第5期73-78,共6页China Mining Magazine

基　　金：国家重点基础研究发展计划(973)项目资助(编号:2010CB731500);国家自然科学基金项目资助(编号:41172264)

摘　　要：以华亭煤矿250103工作面煤柱过渡区开采为背景,采用数值模拟、现场微震和应力监测,研究了工作面回采推进时,煤体内的应力分布及迁移规律,揭示了工作面的冲击矿压显现特征。结果表明:应力的迁移路径为回风顺槽下帮煤体→回撤通道上帮煤体→回风顺槽下帮煤体和大煤柱。在小煤柱区,震动主要集中在相邻采空区中;在大煤柱区,震动主要集中在当前工作面和大煤柱中。测点应力出现对应升高和降低时,易发生强矿压。最后,提出了有效的矿压防治措施和巷道支护技术,确保工作面的安全生产。Basing on coal mining in coal pillar transition region of 250103 working face in Tuating colliery, the stress distribution and migration law in coal entities were investigated by numerical simulation, in-situ monitoring of microseism and stress. Characteristics of coal bump in the process of coal mining were revealed. The results showed that the stress migration path was from the dip side of returning air laneway to the rise side of equipment removing gateway, then to the dip side of returning air laneway and wide coal pillar. In the narrow coal pillar region, vibrations were mainly concentrated in adjacent goal. While in the wide coal pillar region, vibrations were mainly concentrated in current working face and wide coal pillar. The probability of strong mine tremors became higher when the stress value of one measuring point increased and another one decreased at the same time. Effective preventing and controlling measures were demonstrated in order to guarantee the safety of producing at working faces.

关 键 词：煤柱 过渡区 应力迁移 冲击矿压 

分 类 号：TD32[矿业工程—矿井建设]