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有色金属(矿山部分):2021,73(3):28-31
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基于离散元的中厚急倾斜矿体开采对山体稳定性的影响
杨八九1,程 涌1,王建贵2,王永高2
(( 1.云南亚融矿业科技有限公司,昆明 650093; 2.云南锡业股份有限公司,云南 个旧 661000))
Influence of mining of medium thick and steep orebody on mountain stability based on discrete element method
YANG Bajiu1,CHENG Yong1,WANG Jiangui2,WANG Yonggao2
(( 1.Yunnan Yarong Mining Technical Co.Ltd., Kunming 650093,China; 2. Yunnan Tin Co.,Ltd.,Gejiu Yunnan 661000, China))
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投稿时间:2020-06-10    修订日期:2020-06-18
中文摘要: 以笔架山铁矿急倾斜中厚矿体开采对上部山体及金沙江的稳定性为研究对象,在现场调查、矿岩体物理力学实验及质量分级的基础上,采用2D-block离散单元法,对具有代表性的3号和8号剖面在完全空场的情况下开采对上部山体及金沙江的稳定性进行了研究。结果表明:在完全空场条件下,3号剖面块体开裂的范围距离金沙江约为37.51 m,移动角约为65°,说明在模拟围岩发生大范围冒落时,对金沙江的影响也较小;8号剖面由于矿体延伸至650中段,矿体开采后冒落范围也较大,块体开裂范围也延伸到了金沙江边,移动角约为56°,说明8号剖面在模拟围岩发生大范围冒落时,在顶柱、间柱都失去作用的前提下,可能会对金沙江产生一定的影响。研究成果为矿区山体及金沙江的稳定性提供了理论依据。
Abstract:The stability of upper mountain and Jinshajiang River caused by mining steep medium thickness ore body in Bijiashan iron mine was studied. On the basis of field investigation, physical and mechanical experiments of ore rock mass and quality classification, the stability of upper mountain and Jinshajiang River was studied by using 2D block discrete element method when representative sections 3 and 8 were mined completely. The results showed that: under the condition of complete open stope, the range of block cracking in Section 3 was about 37.51 m away from Jinshajiang River, and the moving angle was about 65 degrees, which indicated that the influence on Jinshajiang River was small when the simulated surrounding rock caving occurred in a large range; because the ore body of section 8 extended to the middle of 650, the caving range of ore body was also larger after mining, and the scope of block cracking extended to the side of Jinshajiang River with the moving angle. It was about 56 degrees, which indicated that the No.8 section may have a certain impact on the Jinshajiang River under the premise that the top pillar and the building pillar lose their function when simulating the large-scale caving of surrounding rock. The research results can provide a theoretical basis for the stability of mountains and Jinshajiang River.
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杨八九,程 涌,王建贵,王永高.基于离散元的中厚急倾斜矿体开采对山体稳定性的影响[J].有色金属(矿山部分),2021,73(3):28-31.
YANG Bajiu,CHENG Yong,WANG Jiangui,WANG Yonggao.Influence of mining of medium thick and steep orebody on mountain stability based on discrete element method[J].NONFERROUS METALS(Mining Section),2021,73(3):28-31.

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