防冲煤柱合理宽度的确定方法研究及应用

针对煤柱型冲击矿压的多发性与危害性，基于煤柱弹塑性模型，提出了2种防冲煤柱设计方法。从防治冲击矿压角度利用力学计算方法分别计算屈服煤柱及承载煤柱宽度，得出防冲煤柱合理宽度的理论计算方法。结合某矿实际工程地质情况，合理选择煤柱优化方案，对比煤柱宽度优化前后的矿震活动、冲击矿压显现情况，结果表明优化后的煤柱宽度可有效降低冲击危险性程度。研究成果为防冲煤柱合理宽度的确定提供了依据，具有一定的理论意义与实用价值。

Research and Application of Determination Method for Reasonable Pillar Width of Rock Burst Prevention

According to the frequency and harmfulness of rock burst in coal pillar, two kinds of pillar design methods were proposed for rock burst prevention based on mechanical elastic-plastic model. The width of yield pillar and load pillar were calculated separately with mechanics method, which considered the rock burst prevention and the theoretical formula of reasonable width was obtained. Based on the practical geological situation, the optimized plan was selected to carry out, and then the seismic activity and frequency of rock burst were contrasted. The result showed that the risk of rock burst was greatly decreased after the pillar width optimized. The research provided a basis for determining reasonable pillar width for rock burst prevention, with a certain theoretical significance and practical value.