摘要
以塔山煤矿5105大断面沿空煤巷为工程背景,采用现场实测的方法,对采动过程中巷道表面位移、锚杆锚索端部轴力与距工作面距离之间的变化关系进行了实测研究。结果表明:大断面沿空煤巷在工作面回采及邻近采空区侧向残余支承压力的共同影响下,超前支承压力影响范围明显增大;回采期间巷道两帮收敛量远大于顶底板移近量、沿空侧位移量大于实体煤侧位移量;在采动剧烈影响阶段,锚杆、锚索端部轴力波动幅度较大,表现出与静压巷道完全不同的现象。
Taking 5105 large cross-section gob-side entry in Tashan coal mine as engineering background,by using the on-site measurement method,the variation relationships between roadway surface displacement,end anchor bolt axial force and the distance to coal face were researched in mining process.The results show that under the common influence of mining face and adjacent lateral residual abutment pressure,the advanced abutment pressure influence range of large cross-section gob-side entry is increased;the convergence amount of roadway sides is much larger than the variation amount of roof and floor in recovery period,the displacement along the gob is larger than the entity coal side displacement.In the mining drastic influence stage,the end anchor bolt axial force fluctuations violently,and the phenomena are completely different with the static pressure roadway.
出处
《煤矿安全》
CAS
北大核心
2012年第6期25-28,共4页
Safety in Coal Mines
关键词
大断面
沿空煤巷
矿压规律
表面位移
支承压力
large cross-section
roadway along gob
mining pressure law
surface displacement
abutment pressure
