庞庞塔矿北翼回风大巷围岩失稳破坏原因及支护技术研究

Study on the causes of surrounding rock instability and supporting technology of the north wing return wind roadway in pangpongta mine

庞庞塔矿9-101工作面回采期间其临近的北翼回风大巷出现明显的失稳变形现象,通过数值模拟、理论分析及现场矿压监测表明,北翼回风大巷主要变形形式为两帮内挤,其保护煤柱宽度大于80m时基本不再受采动的影响,设计将9-101工作面回风巷和措施巷内移50m,并采用锚杆锚索对北翼回风大巷两帮补强支护,采取以上措施后,两帮移近最大为30mm,顶底板移近量最大为13mm,能够满足其安全正常使用的断面需求,取得了良好的围岩控制效果。

Tower PangPang ore during 9-101 mining face near the north wing of return air alleys appear buckling deformation phenomenon,through the numerical simulation and theoretical analysis and field mine pressure monitoring shows that the north wing return air alleys within the main deformation forms for two crowded, its protection coal pillar width is greater than 80 m basic no longer affected by mining, design will return air lane and the measure of 9-101 working face of lane in 50 m, and USES the anchor bars to north wing return air distributing alleys two strong support, after the above measures, two nearly 30 mm maximum help move, roof and floor closer quantity is 13 mm, maximum to meet the demand of the safe and normal use of cross section,Good control effect of surrounding rock is obtained.