马兰矿28307工作面巷道支护技术方案研究

针对马兰矿28307工作面所采煤层的具体地质赋存条件和巷道功能,选取巷道断面为矩形,尺寸为4.5 m×3.5 m。根据相似煤巷支护经验选用“锚杆+锚索”联合支护方式,从理论方面计算了各项支护参数。最后通过现场工作面实际变形量监测,证明此支护方案可以保证3202回风顺槽的安全稳定。

Study on Roadway Support Technology Scheme of 28307 Working Face in Malan Coal Mine

In view of the specific geological conditions and roadway functions of the 28307 working face in Malan Coal Mine,this paper selected the roadway section as a rectangle with a size of 4.5 m×3.5 m.According to the support experience of similar coal roadway,the combined support mode of"bolt+anchor cable"was selected,and the support parameters were calculated theo-retically.Finally,through the actual deformation monitoring in the working face,it was proved that the support scheme could ensure the safety and stability of 3202 return air chute.