郭延辉,李克钢,王建国,杨志全,杨八九.基于离散元的倾斜薄矿体开采对上部隔水层稳定性的影响[J].有色金属(矿山部分),2019,71(1):.
基于离散元的倾斜薄矿体开采对上部隔水层稳定性的影响
Influence of inclined thin orebody mining on stability of upper waterproof layer based on discrete element method
投稿时间:2018-10-07  修订日期:2018-10-07
DOI:
中文关键词:  倾斜薄矿体  地下开采  离散元  隔水层  2D-Block
英文关键词:inclined thin ore body  underground mining  discrete element  water-resisting layer  2d-block
基金项目:云南省科技厅应用基础研究面上项目(编号:2018FB075),中国博士后科学基金项目(编号:2017M620433),国家自然科学基金面上项目(编号:41672303)
              
作者单位
郭延辉 云南农业大学
李克钢 昆明理工大学
王建国 云南农业大学
杨志全 昆明理工大学
杨八九 云南亚融矿业科技有限公司
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中文摘要:
      本文以某铅锌矿倾斜薄矿体开采对上部隔水层的稳定性为研究对象,在现场调研和室内岩石力学实验的基础上,采用离散单元法2D-block,在完全空场和预留矿柱两种情况下对上部隔水层的稳定性进行了探讨。结果表明:在完全空场条件下,矿体开采至300m时上盘围岩最大垮落范围约为74m,顶板破坏范围已超过隔水层14m,会影响到隔水层的稳定性;当预留6m顶底柱、3m点柱情况下,回采至300m水平后不会影响到隔水层的稳定性。表明开采过程中预留顶底柱和点柱对于抑制顶板冒落和保护隔水层的稳定性非常重要。研究成果为矿区隔水层的保护提供理论依据。
英文摘要:
      In this paper, the stability of the upper water barrier in the mining of inclined thin orebody in a lead-zinc mine is studied. On the basis of field investigation and rock mechanics test in laboratory, the stability of the upper water barrier is discussed under the conditions of complete open space and reserved pillar by using the discrete element method of 2D-block. The results show that the maximum collapse range of the upper wall rock is about 74 m when the orebody is mined to 300 m under the condition of complete open space, and the failure range of the roof has exceeded the water barrier layer by 14 m, which will affect the stability of the water barrier layer; When the 6m top and bottom pillars and 3m point pillars are reserved, the stability of the waterproof layer will not be affected when the mining reaches level 300m. The results show that it is very important to reserve the pillars in the mining process to restrain the roof caving and protect the stability of the waterproof layer. The research results provide theoretical basis for protecting the waterproof layer of mining area.
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