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| 煤矿底抽钻场瓦斯抽采浓度低的原因分析 |
| Analysis of the causes of low concentration of the gas extraction in a low drilled field of coal mine |
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| DOI： |
| 中文关键词: 瓦斯抽采;封孔;钻场;地质资料 |
| 英文关键词: gas extraction; hole sealing; drilling field; geological data |
| 基金项目: |
| 作者 | 单位 | | 陈凯1,秦汝祥1,2 | 1.安徽理工大学 能源与安全学院,安徽 淮南 232001
2.安徽理工大学 煤矿安全高效开采省部共建教育部重点实验室,安徽 淮南 232001 |
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| 中文摘要: |
| 针对平顶山煤矿底抽巷穿层钻孔封孔工艺复杂,抽采瓦斯浓度低等问题,提出了“两堵一注”封孔新工艺,并对该装置封孔原理和封孔工艺进行了较为详细介绍.指出了该方法能够在瓦斯抽采方面取得很好的效果,但在平煤十三矿底抽巷的D23钻场得不到预期的效果,为此展开了各方面的研究.通过测量D23钻场每组平均瓦斯浓度,得出每组钻孔平均瓦斯浓度低于30%,达不到瓦斯抽采的预期效果,为此结合现场实际地质资料和分析钻场周围水的原因,得出了钻场周围断层较为发育,沟通了底抽巷的空气进入钻孔中,同时水也对瓦斯抽采浓度造成一定程度的影响.为此提出了3点技术措施:合理布置抽采钻场位置;降低水的影响;封孔质量标准化. |
| 英文摘要: |
| According to the problems of complicated hole sealing processes and low gas concentration in bottom pumping alley of Pingdingshan coal mine, this paper proposes a new sealing technology, i.e. “two stuck and a grouting”, and describes the principle of the device sealing and sealing process in detail. This paper also points out that in gas drainage this method can achieve good results, but the drilling field of D23 of coal bottom pumping alley at the thirteenth mine in Pingdingshan cannot get the desired effect, so the research of all aspects must be discussed. By measuring the average gas concentration of each group of D23 drilling field, it concludes that each group borehole gas average concentrations are less than 30%, not reaching the expected effect of gas extraction, so we consider the actual geological data and the water around this drill field. It also concludes that the fault around the drilling field is developing and communicating air of bottom alley into the drilling hole, water can also make effects on the concentration of the gas extraction. At last, this paper puts forward three technical measures to make them better, that is suitable extraction drilling position, reduce the influence of the water, and developing hole sealing quality. |
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