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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Changes in subsidence-field surface movement in shallow-seam coal mining
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Changes in subsidence-field surface movement in shallow-seam coal mining

机译：浅层煤炭开采中沉降场表面运动的变化

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Intensive mining of shallow coal seams tends to result in severe subsidence of the ground surface. Surface subsidence is a complex dynamic spatiotemporal process that constantly changes as mining advances. With Liangshuijing coal mine as a case study, 3DEC numerical software was used to simulate the development of the moving subsidence field from open-off cut to full subsidence on the working face. The results demonstrate that the formation of a subsidence field is directly related to the coal seam depth H and the extent of the mine workings. Taking the advance distance of the working face as the unit of scale, the process of surface subsidence can be divided into four stages: micro-change (H/π), the development of surface subsidence (2H/π), the formation of a movement subsidence field (3H/π), and dynamic balance (4H/π). The changing movement of a subsidence field can be fully described by the characteristics of surface subsidence value, curve slope, and the inflection position. The results provide important technical support for predicting surface subsidence and the temporal-spatial evolution features of mining subsidence.
机译：浅埋煤层的密集采矿往往会导致地面的严重沉降。表面沉降是一种复杂的动态时空流程，随着采矿的进步而不断变化。随着凉水煤矿作为案例研究，3DEC数值软件用于模拟从开关切割到工作面上的全面沉降的移动沉降场的开发。结果表明，沉降场的形成与煤层深度H直接相关，以及矿井工作的范围。采用工作面的前进距离作为规模单位，表面沉降过程可分为四个阶段：微观变化（H /π），表面沉降的开发（2h /π），形成a运动沉降场（3H /π）和动态平衡（4H /π）。沉降场的变化运动可以通过表面沉降值，曲线斜率和拐点的特征来完全描述。结果为预测地表沉降和采矿沉降的时间空间演化特征提供了重要的技术支持。

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