在短距离爆发煤层组中开采第一层的综合气体预防和控制技术
Yong Chen1,2,3, Ronghua Liu1, Yichao Li4
1School of Resource & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, Hunan, China.
ACS omega
|October 2, 2023
概括
本研究通过开发超密封煤层的先进检测和提取前技术,解决了Diandong采矿区的煤炭和天然气爆发问题. 这些方法在具有挑战性的采矿条件下提高了安全性和天然气开采效率.
科学领域:
- 采矿工程 采矿工程 采矿工程
- 地质技术工程 地质技术工程
- 地球科学 地球科学 地球科学
背景情况:
- 煤炭和天然气爆发在采矿中构成重大风险,特别是在高含量和高压力的近距离层中.
- 迪安东采矿区由于其超密封的煤层 (含气量高达20 m3/t,压力3 MPa) 提出了独特的挑战.
- 现有的方法在这种复杂的地质构成中难以有效地检测,预防和提取气体.
研究的目的:
- 开发超密集的煤层组的先进检测和提取前技术.
- 为了提高气体提取质量和效率,在低透性煤层.
- 建立在高风险爆发区域的联合提取和安全方法.
主要方法:
- 构建了先进的检测技术,以完全覆盖挖掘工作面的前面.
- 在超密集层中开发了相邻和目标煤层的预开采技术.
- 实施跨层固定点孔扩展和透性增强技术.
- 提出了分级增强预提取和分段调节和提取的综合工艺,包括"固定点控制段密封煤层组的预提取和采矿减压孔的二次密封和提取".
主要成果:
- 在挖掘面部实现了全面覆盖的先进检测.
- 成功实施超近邻近和目标煤层的预提取.
- 开发并应用了一种跨层固定点孔扩张和透性增强的方法.
- 验证了一种新的组合工艺,用于分级增强的提取前和细分调节和提取.
结论:
- 开发的技术提供了有效的解决方案,用于检测和防止超紧密的组中的煤和天然气爆发.
- 新方法显著提高了天然气开采的质量和效率,提高了采矿安全.
- 这项研究为管理高压,高气体环境中联合开采相关风险提供了实际框架.
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