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新型无煤柱自成巷开采成套技术与案例研究
Xingyu Zhang, Manchao He, Jun Yang, Eryu Wang, Jiabin Zhang, Yue Sun
工程（英文） ›› 2020, Vol. 6 ›› Issue (11) : 1315-1329.
PDF(7006 KB)
PDF(7006 KB)
新型无煤柱自成巷开采成套技术与案例研究
An Innovative Non-Pillar Coal-Mining Technology with Automatically Formed Entry: A Case Study
本文介绍了无煤柱自成巷煤炭开采成套技术，旨在减少地下煤炭资源的浪费和矿井巷道的开挖。通过三类关键技术的相互配合，该开采技术实现了沿空巷道的自动留设，进而实现无煤柱开采。其中，恒阻大变形支护（constant-resistance large deformation support, CRLD）保证了留设巷道的顶板稳定性，定向预裂爆破（directional presplitting blasting, DPB）分割了巷道和采空区间的顶板联系，挡矸系统支护（blocking-gangue support system, BGSS）整合了采空区内垮落的岩体材料，以形成有效巷帮。通过工业性试验，验证了这三类关键技术的工程效果。现场应用结果表明：由于垮落岩体的碎胀支撑特性，留设巷道将处于卸压环境下。在经历短暂的动压影响之后，留设巷道逐渐稳定，稳定之后的巷道可满足煤矿安全生产要求。本文的研究结果论证了该开采技术具有良好的工程应用性。根据所提出的设计原则，因地制宜，无煤柱自成巷开采技术可在井工煤矿进行大规模推广。
A non-pillar coal-mining technology with an automatically formed entry is proposed, which reduces the waste of coal resources and the underground entry drivage workload. Three key techniques in this technology cooperate to achieve automatic formation and retaining of the gob-side entry, and to realize non-pillar mining. Constant-resistance large deformation (CRLD) support ensures the stability of the entry roof; directional presplitting blasting (DPB) separates the entry roof and the gob roof; and a blocking-gangue support system (BGSS) integrates the caved rock material as an effective entry rib. An industrial test was conducted to verify the engineering effects of these key techniques. The field application results showed that the retained entry was under the pressure-relief zone due to the broken-expansion nature of the caved rock mass within the DPB height. After going through a provisional dynamic pressure-bearing zone, the retained entry entered the stability zone. The final stable entry meets the requirements of safety and production. The research results demonstrate the good engineering applicability of this technology. By taking the framework of the technology design principles into consideration and adjusting the measures according to different site conditions, it is expected that the proposed non-pillar coal-mining technology can be popularized on a large scale.
无煤柱开采 / 巷道支护 / 沿空成巷 / 岩石工程 / 工业试验
Non-pillar mining / Entry support / Retained entry / Rock engineering / Industrial test
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