基于可释放弹性能的窄煤柱合理宽度研究

Study on Reasonable Width of Narrow Coal Pillar Based on Releasable Elastic Energy

山西某矿1327工作面巷道变形严重,首先利用极限平衡理论确定沿空掘巷窄煤柱留设尺寸为6.81～7.70 m,然后利用FLAC3D内置fish语言进行可释放弹性能的编程,分析了4种不同煤柱方案下可释放弹性能的释放情况,结果表明7 m煤柱时可释放弹性能较小且承载能力较好。最后综合理论结果和模拟结论,确定沿空掘巷合理煤柱尺寸7 m.

The roadway of 1327 working face in a mine in Shanxi is seriously deformed. Firstly, the Limit equilibrium Theory is used to determine the narrow coal pillar size of the roadway along the goaf is 6. 81 -7.70 m. Then the FLAC3D built-in Fish language is used to program the releasable elastic energy. Release of elastic energy released under four different coal pillar schemes. The results show that the 7 m width coal pillar can release less elastic energy and better bearing capacity. Finally, the theoretical results and simulation conclusions are combined to determine the reasonable coal pillar size of 7 m along the goaf roadway.