A novel short‐wall caving zone backfilling technique for controlling mining subsidence,Energy Science & Engineering

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A novel short‐wall caving zone backfilling technique for controlling mining subsidence
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2019-08-04 , DOI: 10.1002/ese3.418
Wenbing Liu _{1,

2} , Jingmin Xu ₃ , Weibing Zhu _{1,

2} , Sihua Wang ₂

Affiliation

Mining‐induced voids are the main circulation pathways for underground fluids such as water and coalbed methane. The collapse of these voids transmits to the ground surface, resulting in subsidence and building collapse. Accordingly, effective and feasible solutions are needed to control surface subsidence. In this study, a novel technique of void filling in the short‐wall caving zone was proposed to better control surface subsidence in thin coal seam mining. The width of the working face plays a key role in the proposed technique. A maximum surface subsidence value was predicted using numerical simulation and physical simulation experiments with different working face widths. The results indicate that the appropriate working face width should be less than 50 m for the studied coal mine. In this example, the surface subsidence coefficient was less than the standard value for initial damage to rural structures. Both advancing speed and productivity of the working face were achieved using the proposed technique because the filling and mining processes were conducted simultaneously on different faces. The results suggest that surface subsidence during thin coal seam mining could be controlled using the proposed technique. This technique can also help mitigate mining‐induced water inrush and gas leakage disasters by filling voids.

中文翻译：

一种控制开采沉陷的新型短壁崩落带回填技术

采矿引起的空洞是地下流体（例如水和煤层气）的主要循环路径。这些空隙的塌陷传播到地面，导致沉降和建筑物塌陷。因此，需要有效和可行的解决方案来控制地面沉降。在这项研究中，提出了一种在短壁崩落带中充填孔隙的新技术，以更好地控制薄煤层开采中的地面沉降。工作面的宽度在所提出的技术中起关键作用。使用数值模拟和物理模拟实验预测了不同工作面宽度下的最大地面沉降值。结果表明，所研究的煤矿合适的工作面宽度应小于50 m。在这个例子中地面沉降系数小于对农村建筑物的初始破坏的标准值。使用该技术既可以提高工作面的速度，又可以提高生产率，因为在不同的工作面同时进行了充填和采矿过程。结果表明，采用所提出的技术可以控制薄煤层开采过程中的地面沉降。该技术还可以通过填补空隙来帮助减轻采矿引起的突水和瓦斯泄漏的灾害。结果表明，采用所提出的技术可以控制薄煤层开采过程中的地面沉降。该技术还可以通过填补空隙来帮助减轻采矿引起的突水和瓦斯泄漏的灾害。结果表明，采用所提出的技术可以控制薄煤层开采过程中的地面沉降。该技术还可以通过填补空隙来帮助减轻采矿引起的突水和瓦斯泄漏的灾害。

更新日期：2019-08-04

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