基于载荷转移距离和有效宽度的煤柱稳定性评价方法
发布时间：2019-08-12 12:28
【摘要】：煤柱稳定性评价是房柱式开采设计的主要研究内容之一。在分析煤柱强度、煤柱载荷和从属面积法煤柱稳定性评价的基础上,定义了煤柱有效宽度为煤柱横截面内最大内切圆直径,引入采动载荷转移距离LTD,建立了基于载荷转移距离和煤柱有效宽度的煤柱稳定性评价方法。通过对规则煤柱和不规则煤柱稳定性的对比分析,表明新方法能有效改进传统从属面积法评价煤柱稳定性的局限性。为验证基于载荷转移距离和有效宽度的煤柱稳定性评价方法的可靠性,采用3DEC数值方法进行了模拟分析,模拟计算的煤柱载荷分布规律与理论计算一致,相对误差多在10%以下,最大相对误差为12.68%,验证了基于载荷转移距离的煤柱载荷计算的合理性。表明新方法不仅适用于规则煤柱,也适用于不规则煤柱,具有较好的普适性。
[Abstract]:The stability evaluation of coal pillar is one of the main research contents of room-pillar mining design. Based on the analysis of coal pillar strength, coal pillar load and subordinate area method, the effective width of coal pillar is defined as the maximum internal tangent circle diameter in the cross section of coal pillar, and the coal pillar stability evaluation method based on load transfer distance and effective width of coal pillar is established by introducing mining load transfer distance LTD,. Through the comparative analysis of the stability of regular coal pillar and irregular coal pillar, it is shown that the new method can effectively improve the limitations of the traditional subordinate area method in evaluating the stability of coal pillar. In order to verify the reliability of the coal pillar stability evaluation method based on load transfer distance and effective width, the 3DEC numerical method is used to simulate and analyze the coal pillar load distribution law, which is consistent with the theoretical calculation. The relative error is less than 10% and the maximum relative error is 12.68%. The rationality of the coal pillar load calculation based on load transfer distance is verified. The results show that the new method is not only suitable for regular coal pillar, but also suitable for irregular coal pillar, and has good universality.
【作者单位】： 中国矿业大学(北京)地球科学与测绘工程学院;石家庄学院资源与环境科学学院;
【基金】：国家自然科学基金资助项目(51474217,41071328)
【分类号】：TD823.5
本文编号：2525711
[Abstract]:The stability evaluation of coal pillar is one of the main research contents of room-pillar mining design. Based on the analysis of coal pillar strength, coal pillar load and subordinate area method, the effective width of coal pillar is defined as the maximum internal tangent circle diameter in the cross section of coal pillar, and the coal pillar stability evaluation method based on load transfer distance and effective width of coal pillar is established by introducing mining load transfer distance LTD,. Through the comparative analysis of the stability of regular coal pillar and irregular coal pillar, it is shown that the new method can effectively improve the limitations of the traditional subordinate area method in evaluating the stability of coal pillar. In order to verify the reliability of the coal pillar stability evaluation method based on load transfer distance and effective width, the 3DEC numerical method is used to simulate and analyze the coal pillar load distribution law, which is consistent with the theoretical calculation. The relative error is less than 10% and the maximum relative error is 12.68%. The rationality of the coal pillar load calculation based on load transfer distance is verified. The results show that the new method is not only suitable for regular coal pillar, but also suitable for irregular coal pillar, and has good universality.
【作者单位】： 中国矿业大学(北京)地球科学与测绘工程学院;石家庄学院资源与环境科学学院;
【基金】：国家自然科学基金资助项目(51474217,41071328)
【分类号】：TD823.5
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