复杂地质条件下煤体-充填体协同控制技术
Co-control Technology of Coal Body and Filling Body Under Complex Geological Conditions
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摘要: 基于深部复杂地质条件下传统沿空掘巷技术受限的难题，提出了煤体-充填体协同护巷沿空掘巷技术。研究了该技术巷内充填工艺、煤体-充填体之间接触面受力情况、两帮力学模型、塑性区影响因素和瓦斯压力影响情况等。结果表明：Ⅲ3302 工作面内煤体-充填体的最佳宽度为6 m，此时巷道围岩整体变形在可控范围内，没有发生失稳现象，说明该技术方案达到了预期的防治效果。Abstract: Based on the difficulties of traditional gob-side entry driving technology under deep complicated geological conditions, the technology of coal body and filling body co-protecting roadway and excavating roadway along the gob is proposed. The technical parameters of the backfilling in the roadway, the force of the contact surface between the coal body and the filling body, the two sides mechanics model, the influence factors of the plastic zone and the influence of the gas pressure are studied. The results show that the optimum width of the coal body filling body is 6 m at Ⅲ3302 working face, and the whole deformation of the surrounding rock in the roadway is within the controllable range without instability. It shows that the technical scheme achieves the desired control effect.
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