特厚煤层复杂地质条件及特殊工况下的开采技术

Mining Technology of Special Geological Conditions and Special Conditions in Super Thick Coal Seam

针对大同矿区石炭系特厚煤层综采工作面在复杂地质构造条件下发生支架倾斜、机道煤顶冒落、移架困难的特殊情况,对特厚煤层破坏作用原理进行研究分析,采取了支架与输送机分解、扶架、漏顶区域抬棚刹顶、机道超前支护、煤壁前方穿钢针、超前注射永固S等综合技术手段,将支架调整至合理工况下,并有效地控制了煤壁前方顶煤的垮落和裂隙发育,直至将工作面推进至顶煤完整区域。避免了综采设备被压的损失,降低了开采成本,实现了在复杂的地质条件、特殊工况下的安全推进。

Aiming at the special situation of the tilting of the support, the collapse of the roof and the difficulty of the transfer, under the complex geological conditions of the fully mechanized coal face in the super thick coal seam in Datong mining area, studies the failure mechanism of extra thick coal seam, the top of the carriage and the conveyor is decomposed, the supporting frame and the top leakage area are lifted. The track for the advanced support, in front of the coal wall in advance of injection needle, S comprehensive means of existence, adjust the bracket to reasonable working condition. The collapse and fracture development of top coal in front of coal wall is effectively controlled, until the top coal will promote the complete area of working face. The pressure loss of the fully mechanized mining equipment is saved, and the mining cost is reduced, to achieve the safety of the complex geological conditions and special conditions.