摘要
为了研究郑州矿区采动底板变形破坏情况,对郑州矿区超化煤矿22121(东)综放工作面上下巷道钻场所布置钻孔的应变实测,得出了三软煤层巷道底板采动变形破坏的深度、层位及其受采动煤壁前方应力峰值的宽度和影响的范围,受超前应力集中的影响,下巷的变形破坏深度和程度均大于上巷。研究结果表明,在正常采动情况下厚的软煤和软底对应力和变形的传播具有一定的缓冲作用,主采煤层底板中段灰岩组(L_7和L_8灰)对应力分布和变形破坏起到了重要控制作用。
In order to research the deformation and failure of the mining floor in Zhengzhou mining area,the strain site measurements were conducted with the boreholes drilled in the up and down gateways of the No.22121 East fully mechanized top coal caving mining face in Chaohua Mine of Zhengzhou Mining Area.The mining deformation failure depth and strata location of the seam floor in the soft roof,coal, and floor gateway were obtained as well as the width and influence scope of the stress peat value in the front of ...
出处
《煤炭科学技术》
CAS
北大核心
2008年第10期10-13,共4页
Coal Science and Technology
基金
国家自然科学基金(青年基金)资助项目(40702054)
关键词
三软煤层
综放开采
应变实测
变形破坏
soft roof
coal and floor seam
fully mechanized top coal caving mining
strain site measurement
deformation failure
