8.8 m超大采高综采面回采巷道合理支护参数研究

神东煤炭集团上湾煤矿12401综采工作面为全国首个8.8 m超大采高综采工作面,为满足采掘、运输和通风需求,该工作面回采巷道需要相对较大的设计尺寸。为确保该综采工作面安全回采试验,采用工程类比、理论计算、数值模拟和现场监测等综合研究手段,确定了超大采高综采工作面回采巷道支护方式为“锚网索带”联合支护,并确定了关键支护参数。通过数值模拟和现场实测,结果表明围岩变形量均小于10 mm,支护效果良好,验证了回采巷道支护参数的合理性。

Research on the reasonable support parameters of fully mechanized mining face with 8.8 m super high mining height

The 12401 fully mechanized working face of Shangwan Coal Mine of Shendong Coal Group is the first fully mechanized working face with 8.8 m super high mining height in China,in order to meet the needs of mining,transportation and ventilation,the mining roadway of this working face needs relatively large design size.In order to ensure the safe mining test of the fully mechanized working face,the comprehensive research methods such as engineering analogy,theoretical calculation,numerical simulation and field monitoring were used to determine that the support mode of the fully mechanized working face with super high mining height was bolt-mesh-cable-belt combined support,and the key support parameters were determined.Through numerical simulation and field measurement,the results showed that the deformation of surrounding rock was less than 10 mm,and the supporting effect was good,which verified the rationality of supporting parameters of mining roadway.