摘要
以采动巷道群稳定性为研究对象,采用数值计算模拟研究方法,研究了工作面煤柱不同留宽对巷道群稳定性的影响。分析了不同煤柱留宽时采场侧向支承压力分布规律;分析采场侧向支承压力对巷道群的影响。得到留宽140m时煤柱内侧向支承压力影响至煤柱内部70m左右,在采宽120m时,煤柱内部的垂直应力就已受到采动支承压力以及巷道支承压力的叠加影响。在不对巷道群加强支护的情况下,合理的煤柱留宽为120m。
This paper takes the stability of roadway group under influence of strip mining as the main subject of investigation. Adopting the research methods of numerical simulation, the distributional regularities of the side abutment pressure in different retaining width of pillar are analysed ; and the influence characteristic of the side abutment pressure on the stability of roadway group is analyzed. When the coal - pillar is 140m wide, the effect zone is about 70m from the pillar inside. When the coal - pillar is 120m wide, the zone will effected by mining support pressure and the pressure on the roadway together. For those roadways without strengthening support, a reasonable coal pillar width to remain is 120 m.
出处
《地下空间与工程学报》
CSCD
北大核心
2009年第6期1412-1417,共6页
Chinese Journal of Underground Space and Engineering
关键词
采动影响
侧向支承压力
巷道群
influence of mining
side abutment pressure
roadway group
