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| Stability control support technology for large span roof in crossover roadway |
| Ren Ruiping |
| Wanli No. 1 Mine, Shenhua Baotou Energy Corporation Ltd., Erdos 017000, China |
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Abstract In view of the problem that the 42301 working face cut-hole roadway and its auxiliary transport chute were arranged in a cross-over roadway, the exposed area of the roof slab was large, the horizontal laminae and mud cement structure of the roof slab were obvious, and the support difficulty obviously increased, based on the general analysis of engineering, through numerical simulation, the stress damage characteristics of the surrounding rock in the cross-over roadway at the end of the 42301 working face were revealed. The engineering practice shows that the sinkage of the surrounding rock of crossover roadway was 150~185 mm, and the deformation of the surrounding rock of both sides was 100~160 mm, the current support effect meets the production safety requirements for the preparation of the working face recovery, and the active joint support design scheme was proposed for the crossover roadway, with safe and stable control effect.
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