<div> 急倾斜薄矿体采场围岩及假底应力分布规律研究* </div>

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急倾斜薄矿体采场围岩及假底应力分布规律研究*

急倾斜极薄矿脉是有色、黄金矿山常见的矿体形态，多采用人工假底的留矿法或削壁

充填法回采，研究采动过程中围岩和人工假底的受力分布对于设计假底参数和安全开采具有重要意

义。以某金矿削壁充填采场为工程背景，模拟研究了人工假底及围岩采动过程中应力变化规律。

上、下盘围岩采动后最大主应力和最小主应力减小，回采区域顶板应力集中。假底中心处垂直压力

最小，越靠近上、下盘边壁垂直压力增加，随着采高增加，假底各部位的垂直压力增加，最后呈收敛趋

势。人工假底主要是剪应力破坏，假底破坏主要是上、下盘高水平应力未作用在同一轴线而产生的

剪应力造成的。根据散体侧压力和采动应力变化规律，提出在采场内每隔10 m利用混凝土铺底，增

加人工假底中混凝土强度及垂直方向的配筋，提高假底抗剪强度，从而提高深部采场回采的安全性

和人工假底的稳固性。

1. 河北钢铁集团矿业有限公司；

2. 东北大学资源与土木工程学院

出版日期:2024-04-15 发布日期:2024-08-13

Research on Stress Distribution on Artificial Base and Surrounding Rock

of Stope with Steeply Inclined and Thin Orebody

Steeply inclined and extremely thin vein is a common form of ore body in nonferrous and

gold mines. Most of them are mined by artificial base retention method or cutting wall filling method. It is of

great significance to study the stress distribution of surrounding rock and artificial base in the process of min⁃

ing for the design of base parameters and safe mining. Based on the engineering background of the cutting

and filling stope of a gold mine，the stress variation law of artificial base and surrounding rock during mining

is simulated and studied. The maximum principal stress and the minimum principal stress of the surrounding

rock of the upper and lower plates decrease after mining，and the roof stress in the mining area is concentrat⁃

ed. The vertical pressure at the center of the base is the smallest，and the closer to the upper and lower side

walls，the more vertical pressure increases. With the increase of mining height，the vertical pressure of each

part of the base increases and finally shows a convergence trend. The artificial base is mainly caused by

shear stress failure. The base failure is mainly caused by the shear stress generated by the high-level stress

of the upper and lower plates that does not act on the same axis. According to the variation law of bulk solid

pressure and mining stress，it is proposed to use concrete to lay the bottom every 10 m in the stope，increase

the concrete strength and vertical reinforcement in the artificial base，and improve the shear strength of the

base，so as to improve the safety of deep stope mining and the stability of the artificial base

.

1.HBIS Minging Co.，Ltd.; 2. College of Resources and Civil Engineering，Northeastern University

Online:2024-04-15 Published:2024-08-13

摘要/Abstract

摘要：

急倾斜极薄矿脉是有色、黄金矿山常见的矿体形态，多采用人工假底的留矿法或削壁

充填法回采，研究采动过程中围岩和人工假底的受力分布对于设计假底参数和安全开采具有重要意

义。以某金矿削壁充填采场为工程背景，模拟研究了人工假底及围岩采动过程中应力变化规律。

上、下盘围岩采动后最大主应力和最小主应力减小，回采区域顶板应力集中。假底中心处垂直压力

最小，越靠近上、下盘边壁垂直压力增加，随着采高增加，假底各部位的垂直压力增加，最后呈收敛趋

势。人工假底主要是剪应力破坏，假底破坏主要是上、下盘高水平应力未作用在同一轴线而产生的

剪应力造成的。根据散体侧压力和采动应力变化规律，提出在采场内每隔10 m利用混凝土铺底，增

加人工假底中混凝土强度及垂直方向的配筋，提高假底抗剪强度，从而提高深部采场回采的安全性

和人工假底的稳固性。

关键词:

急倾斜薄矿体人工假底削壁充填法散体压力

Abstract:

Steeply inclined and extremely thin vein is a common form of ore body in nonferrous and

gold mines. Most of them are mined by artificial base retention method or cutting wall filling method. It is of

great significance to study the stress distribution of surrounding rock and artificial base in the process of min⁃

ing for the design of base parameters and safe mining. Based on the engineering background of the cutting

and filling stope of a gold mine，the stress variation law of artificial base and surrounding rock during mining

is simulated and studied. The maximum principal stress and the minimum principal stress of the surrounding

rock of the upper and lower plates decrease after mining，and the roof stress in the mining area is concentrat⁃

ed. The vertical pressure at the center of the base is the smallest，and the closer to the upper and lower side

walls，the more vertical pressure increases. With the increase of mining height，the vertical pressure of each

part of the base increases and finally shows a convergence trend. The artificial base is mainly caused by

shear stress failure. The base failure is mainly caused by the shear stress generated by the high-level stress

of the upper and lower plates that does not act on the same axis. According to the variation law of bulk solid

pressure and mining stress，it is proposed to use concrete to lay the bottom every 10 m in the stope，increase

the concrete strength and vertical reinforcement in the artificial base，and improve the shear strength of the

base，so as to improve the safety of deep stope mining and the stability of the artificial base.

Key words:

steeply inclined and thin orebody, artificial base, cutting wall filling method, bulk solid pressure

李华荣辉何荣兴张星宇.

急倾斜薄矿体采场围岩及假底应力分布规律研究*

[J]. 现代矿业, 2024, 40(04): 182-.

LI Hua RONG Hui HE Rongxing ZHANG Xingyu.

Research on Stress Distribution on Artificial Base and Surrounding Rock

of Stope with Steeply Inclined and Thin Orebody

[J]. Modern Mining, 2024, 40(04): 182-.

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