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In consideration of safety problem of landfilling into a dump with inclined foundation in an open-pit mine, an inclined foundation model and an anti-slide coal pillar model were established based on the analysis of landfilling methods in such inclined dump, deformation characteristics and sliding mode of inclined foundation, and then the method for evaluating stability of anti-slide coal pillar and influencing factors of the stability coefficient of dump slope were all discussed. The research results show that the stability of anti-slide coal pillar mainly depends on the relationship between the internal friction angle of coal pillar and the rest angle of waste material. When the internal friction angle is greater than or equal to the rest angle, the stability coefficient of dump slope increases with an increase in the length of anti-slide coal pillar; while when the internal friction angle is less than the rest angle, the stability coefficient of dump slope increases first, then falls down and finally increases again as anti-slide coal pillar becomes longer.

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针对露天矿倾斜基底排土安全防护问题,分析了倾斜基底排土方式、变形特征及滑动模式,建立了倾斜基底模型与抗滑煤柱模型,分析了抗滑煤柱稳定评价方法和排土台阶边坡稳定系数影响因素。结果表明,抗滑煤柱稳定性由煤柱内摩擦角θ和排弃物料安息角θ之间关系决定;当θθ时,随煤柱长度增加,排土台阶边坡稳定系数增大;当θ<θ时,随煤柱长度增加,排土台阶边坡稳定系数呈增大、减小、再增大的变化特征。

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周游(1986—),男,重庆合川人,硕士,副研究员,主要研究方向为露天开采、资源开发与规划。

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周游(1986—),男,重庆合川人,硕士,副研究员,主要研究方向为露天开采、资源开发与规划。

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周游(1986—),男,重庆合川人,硕士,副研究员,主要研究方向为露天开采、资源开发与规划。

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倾斜基底排土场抗滑煤柱稳定性计算方法
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周游 1, 2
矿冶工程杂志 | 采矿 2023,43(3): 30-32
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矿冶工程杂志 | 采矿 2023, 43(3): 30-32
倾斜基底排土场抗滑煤柱稳定性计算方法
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周游1, 2
作者信息
  • 1.中煤科工生态环境科技有限公司,北京 100013
  • 2.天地科技股份有限公司,北京 100013
  • 周游(1986—),男,重庆合川人,硕士,副研究员,主要研究方向为露天开采、资源开发与规划。

Stability Calculation for Anti-slide Coal Pillar in Dump with Inclined Foundation
You ZHOU1, 2
Affiliations
  • 1.CCTEG Ecological Environment Technology Co Ltd, Beijing 100013, China
  • 2.Tiandi Science and Technology Co Ltd, Beijing 100013, China
出版时间: 2023-06-01 doi: 10.3969/j.issn.0253-6099.2023.03.007
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针对露天矿倾斜基底排土安全防护问题,分析了倾斜基底排土方式、变形特征及滑动模式,建立了倾斜基底模型与抗滑煤柱模型,分析了抗滑煤柱稳定评价方法和排土台阶边坡稳定系数影响因素。结果表明,抗滑煤柱稳定性由煤柱内摩擦角θ和排弃物料安息角θ之间关系决定;当θθ时,随煤柱长度增加,排土台阶边坡稳定系数增大;当θ<θ时,随煤柱长度增加,排土台阶边坡稳定系数呈增大、减小、再增大的变化特征。

露天矿  /  倾斜基底  /  排土场  /  抗滑煤柱  /  滑动机制  /  边坡稳定性

In consideration of safety problem of landfilling into a dump with inclined foundation in an open-pit mine, an inclined foundation model and an anti-slide coal pillar model were established based on the analysis of landfilling methods in such inclined dump, deformation characteristics and sliding mode of inclined foundation, and then the method for evaluating stability of anti-slide coal pillar and influencing factors of the stability coefficient of dump slope were all discussed. The research results show that the stability of anti-slide coal pillar mainly depends on the relationship between the internal friction angle of coal pillar and the rest angle of waste material. When the internal friction angle is greater than or equal to the rest angle, the stability coefficient of dump slope increases with an increase in the length of anti-slide coal pillar; while when the internal friction angle is less than the rest angle, the stability coefficient of dump slope increases first, then falls down and finally increases again as anti-slide coal pillar becomes longer.

open-pit mine  /  inclined foundation  /  dump  /  anti-sliding coal pillar  /  sliding mechanism  /  slope stability
周游. 倾斜基底排土场抗滑煤柱稳定性计算方法. 矿冶工程杂志, 2023 , 43 (3) : 30 -32 . DOI: 10.3969/j.issn.0253-6099.2023.03.007
You ZHOU. Stability Calculation for Anti-slide Coal Pillar in Dump with Inclined Foundation[J]. Mining and Metallurgical Engineering, 2023 , 43 (3) : 30 -32 . DOI: 10.3969/j.issn.0253-6099.2023.03.007
  • 中国煤炭科工集团有限公司科技创新创业资金专项项目(2019-ZD004)
2023年第43卷第3期
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doi: 10.3969/j.issn.0253-6099.2023.03.007
  • 接收时间:2022-11-27
  • 首发时间:2026-03-05
  • 出版时间:2023-06-01
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  • 收稿日期:2022-11-27
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中国煤炭科工集团有限公司科技创新创业资金专项项目(2019-ZD004)
作者信息
    1.中煤科工生态环境科技有限公司,北京 100013
    2.天地科技股份有限公司,北京 100013
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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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