强冲击特厚煤层掘进面前方卸压实践

Zhongzhou Coal(2013)

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Abstract
千秋煤矿21112工作面上覆坚硬巨厚砾岩层,属强冲击特厚煤层,掘进面煤体应力较高。通过在掘进面正前方实施大直径卸压钻孔和深孔卸压爆破,有效降低了掘进面前方煤体应力,保障了掘进期间的安全生产。这两项措施的合理配合应用,在21112工作面取得了良好的卸压效果。
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Key words
driving face,extremely-thick coal seam,rock burst
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