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| Support design and application of 15301 return air roadway through fault broken zone |
| Xu Liujun |
| Shanxi Xincun Coal Industry Co., Ltd., Changzhi 046000, China |
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Abstract During the period of Xincun Coal Industry15301 return air roadway passing F19 fault, the fault fracture zone was exposed, the roadway support was difficult, and the ore pressure was obvious, which brought great hidden trouble to the safe use of roadway in the subsequent mining period.Based on the advanced detection and verification analysis of F19 fault, combined with the actual geological conditions of the site, the advanced pipe shed intensive roof and pre-grouting were used to control the roof fracture zone within the influence range of the fault, and the combined support of anchor net and cable shotcrete was used to strengthen the support of the surrounding rock of the roadway.The practice showed that the support design could effectively control the deformation of roadway surrounding rock, and met the safety tunneling needs of 15301 return air roadway through fault fracture zone and the use requirements of roadway during mining of 15301 working face.
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