余学义, 穆驰, 王皓, 等. 孟加拉国Barapukuria矿厚煤层分层协调减灾开采模式[J]. 煤炭学报, 2022, 47(6): 2352-2359. DOI: 10.13225/j.cnki.jccs.2021.1058
引用本文: 余学义, 穆驰, 王皓, 等. 孟加拉国Barapukuria矿厚煤层分层协调减灾开采模式[J]. 煤炭学报, 2022, 47(6): 2352-2359. DOI: 10.13225/j.cnki.jccs.2021.1058
YU Xueyi, MU Chi, WANG Hao, et al. Mining mode of layered and coordinated disaster reduction in thick coal seam of Barapukuria Coal Mine in Bangladesh[J]. Journal of China Coal Society, 2022, 47(6): 2352-2359. DOI: 10.13225/j.cnki.jccs.2021.1058
Citation: YU Xueyi, MU Chi, WANG Hao, et al. Mining mode of layered and coordinated disaster reduction in thick coal seam of Barapukuria Coal Mine in Bangladesh[J]. Journal of China Coal Society, 2022, 47(6): 2352-2359. DOI: 10.13225/j.cnki.jccs.2021.1058

孟加拉国Barapukuria矿厚煤层分层协调减灾开采模式

Mining mode of layered and coordinated disaster reduction in thick coal seam of Barapukuria Coal Mine in Bangladesh

  • 摘要: 针对孟加拉国Barapukuria矿井开采中的顶板水害、冲击地压、煤层自然发火等危害矿井安全的灾害问题,在分析矿井“三厚二硬一强”地质特征及UDT强含水砂层水害、厚硬顶板断裂强冲击灾害和厚煤层多分层开采采空区遗煤的易自然发火灾害的致灾条件,LDT隔水层隔水性能和覆岩结构关键层稳定性的控灾条件的基础上,提出了厚煤层分层协调减灾开采理论。应用协调减灾开采理论、原理,构建了孟巴矿厚煤层分层协调减灾开采模式和顶板水害上保下疏,冲击地压动静转移和自燃火灾时空适配的多灾源防控技术体系,实现了孟巴矿厚煤层多分层安全开采。通过在孟巴矿的应用与实践表明,厚煤层分层限厚开采能够充分利用覆岩结构控灾机制,避免厚硬顶板整体断裂冲击灾害发生;厚煤层分层协调错距布置方法开采,能够分散转移厚煤层边界高应力、避免覆岩拉伸区叠加破坏,有效保护隔水层的完整与隔水性;厚煤层分层整体错距协调开采方式,能够有效释放上分层采空区煤柱应力,实现覆岩整体快速沉降,密实覆岩垮裂带空隙,降低采空区自然发火危险性。在多灾害叠加的矿井开采条件下,应用协调减灾开采方法能够从源头控制开采致灾强度,与常规灾害防治方法相结合,能够起到更明显的灾害防治效果。

     

    Abstract: According to the problems of roof water disaster, rock burst, and spontaneous combustion of a coal seam in the Barapukuria coal mine of Bangladesh, this paper analyzes the geological characteristics of “three thick, two hard and one strong” and the disaster conditions of the water disaster in the UDT strong water-bearing sand layer, the strong impact disaster of thick and hard roof fracture and the spontaneous combustion of residual coal in thick seam multi-layered mining goaf.On the basis of the disaster control conditions of the water-resisting performance of the LDT aquifuge and the stability of key strata of overburden structure, the theory of layered coordinated disaster reduction mining in a thick coal seam is put forward.Based on the theory and principle of coordinated disaster reduction mining, the mining mode of layered coordinated disaster reduction in the thick coal seam of Barapukuria coal mine is proposed.Also, the multi-disaster source prevention and control technology system of roof water disaster upper protection and lower drainage, dynamic and static transfer of rock burst and space-time adaptation of spontaneous combustion fire is constructed.The multi-layered safe mining of the thick coal seam in Barapukuria coal mine is realized.Through the application and practice in the Barapukuria coal mine, it shows that the thick seam slicing and thickness limiting mining can make a full use of the disaster control mechanism of overburden structure, and avoid the whole fracture and impact disaster of the thick and hard roof.The thick coal seam layered coordination staggered layout mining method can disperse and transfer the high stress at the boundary of the thick coal seam, avoid the superimposed damage of overlying rock stretching area, and effectively protect the integrity and water resistance of aquiclude.The thick coal seam slice overall staggered distance coordinated mining method can effectively release the coal pillar stress in the upper slice goaf, realize the rapid settlement of the whole overburden, compact the gap in the overburden fracture zone, and reduce the risk of spontaneous combustion in the goaf.Under the condition of multi-disaster superimposed mining, the application of coordinated disaster reduction mining method can control the disaster intensity from the source, combined with conventional disaster prevention methods, it can play a more obvious role on disaster prevention.

     

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