| 深孔预裂爆破提高π型钢梁放顶煤回采率可行探讨 |
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| 引用本文： | 常志有.深孔预裂爆破提高π型钢梁放顶煤回采率可行探讨[J].煤炭技术,2009,28(7). |
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| 作者姓名： | 常志有 |
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| 作者单位： | 鹤岗矿业集团职业大学,黑龙江,鹤岗,154100 |
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| 摘 要： | 摘要:介绍了利用深孔控制预裂爆破技术提高π放工作面放顶煤回收率的试验,并在试验中对预裂爆破前后顶煤移动情况、顶煤回收率进行了考察,试验说明,深孔控制预裂爆破对提高顶煤回收率具有明显的效果。
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| 关 键 词： | 预裂爆破 提高可放性 提高回收率 |
Probe into Improving Recovery Ratio of Caving Coal at π Steel Beam Caving Coal Face by Deep Hole Pre-Fracture Blasting |
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| CHANG Zhi-you.Probe into Improving Recovery Ratio of Caving Coal at π Steel Beam Caving Coal Face by Deep Hole Pre-Fracture Blasting[J].Coal Technology,2009,28(7). |
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| Authors: | CHANG Zhi-you |
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| Affiliation: | Vocational Universiy;Hegang Mining Industry Group;Hegang 154100;China |
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| Abstract: | The experionce of improving the recovery ratio of the caving coal at Ⅱ steel beam caving coal face by deep hole pre-fracture blasting is introduced.And the roof coal moving lefore and after pre-fracture blasting,and the recovery ratio of the roof coal in the test are observed.The experiments show that deep hole pre-fracture blasting has a singificant effect to improve the recovery ratio of the roof coal. |
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| Keywords: | pre-fracture blasting improving caving improving recorvery ratio |
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