Stability characteristics of a fractured high roof under nonpillar mining with an automatically formed roadway by using a visualized discrimination approach,Energy Science & Engineering

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Stability characteristics of a fractured high roof under nonpillar mining with an automatically formed roadway by using a visualized discrimination approach
Energy Science & Engineering ( IF 3.5 ) Pub Date : 2020-02-29 , DOI: 10.1002/ese3.611
Yajun Wang _{1,

2} , Jianning Liu ₂ , Jun Yang ₂ , Qi Wang ₂ , Ruifeng Huang ₂ , Xichun Tian ₂ , Manchao He _{1,

2}

Affiliation

Nonpillar mining (NPM) with an automatically formed roadway is an emerging mining technology that does not use coal pillar retention and drivage. This technology can be used to actively control the caving height of the roof by directional cutting technology and can promote the rapid equilibrium of a fractured high roof under the support of the caved gangue. Therefore, when analyzing the stability of a high roof under NPM, not only the interaction force of the fractured rock blocks but also the effects of the support provided by the gangue, and the coal body should be considered. In addition, if necessary, the roof support in the roadway should also be considered. Based on this idea, in this paper, we analyzed the stability characteristics of a fractured high roof and suggested the stability conditions of the fractured rock of a high roof, including actual stability, pseudostability, and instability and provided the criteria for determining these three stability conditions. Furthermore, a visualized approach for the determination of roof stability was proposed. The core idea of the proposed approach is to transform the parameters that cannot be measured in the abovementioned conditions into visualized data that can be directly or indirectly obtained in the field, allowing for the detection and occasional assessment of the stability condition of the fractured rock of a high roof. This visualized determination approach can be used to assess the roof stability condition in a timely manner during the production process and to ensure production safety. The abovementioned research results were successfully used in the S1201‐II mining face of the Ningtiaota Coal Mine, indicating that the proposed approach is feasible and can be used under similar conditions.

中文翻译：

可视化判别法自动形成巷道的无桩开采下高裂隙顶板的稳定性特征

具有自动形成的巷道的非支柱采矿（NPM）是一种新兴的采矿技术，它不使用煤柱固定和驱动。该技术可用于通过定向切割技术主动控制顶板的崩落高度，并可以在塌陷的脉石的支持下促进高裂隙顶板的快速平衡。因此，在分析NPM下高顶板的稳定性时，不仅要考虑裂隙岩块的相互作用力，还要考虑脉石和煤体提供的支撑作用。此外，如有必要，还应考虑巷道中的屋顶支撑。基于这一思想，本文分析了高裂隙顶板的稳定性特征，并提出了高裂隙岩体的稳定性条件，包括实际的稳定性，伪稳定性和不稳定性，并提供了确定这三个稳定性条件的标准。此外，提出了一种确定屋顶稳定性的可视化方法。提出的方法的核心思想是将在上述条件下无法测量的参数转换为可以在现场直接或间接获得的可视化数据，从而可以检测和偶尔评估裂隙岩的稳定性条件。高高的屋顶。这种可视化的确定方法可用于在生产过程中及时评估屋顶稳定性条件，并确保生产安全。上述研究结果已成功用于Ningtiaota煤矿的S1201-II采煤工作面，

更新日期：2020-02-29

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