Bolt support design of No.2-1111 roadway in Zisheng Coal Industry
Wei Xiange1, Yan Jingxue2
1. Fengyu Coal Industry Co., Ltd., Huozhou Coal Power Group, Linfen 031400, China;
2. College of Safety Science and Engineering, Liaoning Technical University, Fuxin 123000, China
Abstract： In order to solve the problem of gob-side roadway support in No.2-1111 roadway of Zisheng Coal Industry, two observation points of surrounding rock structure were set up for the geological survey of the test roadway, and the roof rock structure and coal body structure of the two points were observed. According to the development of surrounding rock structure and the strength test of surrounding rock and point hole media, it was determined that the roof siltstone should be bolted to strengthen the strength of siltstone, and a joint load-bearing structure of "bolt-surrounding rock" was formed in the shallow part of roadway roof. Anchor cable should be laid on the coal pillar wall to prevent large deformation and damage of the coal pillar wall. The supporting parameters of No.2-1111 roadway should be pre-designed according to the supporting and deformation conditions of roadway (No.2-1031) under similar conditions. This technology provided a reference for the advancement and continuous mining of No.2-1111 roadway, increased the support strength, and reduced the occurrence of underground accidents in coal mines.
