复杂难采大水矿床安全开采综合技术研究

发布时间：2018-09-05 07:15

【摘要】：江西省宜丰万国矿业有限公司(新庄铜铅锌矿)属于以溶洞为主的水文地质条件复杂的岩溶充水矿床。开拓方式及回采顺序的布置、采矿方法的选择、隔水矿柱的安全厚度的留设、充填系统的建立不仅是解决此类矿床安全开采的关键,还是采场上覆岩层变形、移动和非连续性破坏造成上覆含水层和地表塌陷、开裂等安全事故的原因。本文针对新庄铜铅锌矿岩溶充水矿床开采技术条件,采用理论分析、调查统计、模糊数学理论、FLAC 3D数值模拟相结合的方法进行水体下安全开采关键技术的深入分析和综合研究。首先,通过对文献的查阅,研究国内外类似水体下矿床安全开采的关键技术。针对新庄铜铅锌矿的开采技术条件,分析该矿床安全开采关键技术难点为合理的隔水矿柱安全厚度的留设、合理的开采顺序及最优采矿方法的确定,采用数值模拟与理论分析相结合的方法进行了深入的研究。其次,对该矿床矿体赋存条件、含水层及岩溶裂隙水等水文地质条件进行了深入的调查研究,确定了该矿山防治水技术方案。第三,分析了影响导水裂隙带的因素,运用经验公式法得出了隔水矿柱的安全厚度。第四,根据国内外同类矿山安全开采的经验和本矿山具体的开采技术条件,初选了采矿方法,并通过技术比较、经济比较以及模糊评判得出了最优的采矿方法,即“上向水平分层胶结充填采矿法”。第五,运用FLAC 3D数值模拟技术,对矿床的开采顺序进行了模拟研究,得出了安全可靠的矿床开采顺序,并进行了充填材料试验及充填系统的设计。最后,选择Ⅱ3矿体的303-8#、14#、403-5#、6#等4个采场作为试验矿块进行了现场工业试验,对采准切割工艺、回采工艺及充填工艺进行了深入的研究,并进行了试验效果及效益的分析,取得了良好的试验效果。
[Abstract]:Jiangxi Yifeng Wanguo Mining Co., Ltd (Xinzhuang copper-lead-zinc deposit) belongs to karst water-filled deposit, which is dominated by karst caverns with complex hydrogeological conditions. It is not only the key to solve the problem of safe mining, but also the deformation of overlying strata, such as the arrangement of development mode and mining sequence, the selection of mining method, the setting up of safe thickness of water-proof pillar and the establishment of filling system. The causes of safety accidents such as collapse and cracking of overlying aquifer and surface caused by moving and discontinuous failure. In view of the technical conditions of karst water-filled deposit in Xinzhuang copper-lead-zinc mine, the key techniques of safe mining under water body are analyzed and synthetically studied by the methods of theoretical analysis, investigation and statistics, and FLAC 3D numerical simulation of fuzzy mathematics theory. Firstly, the key technologies of safe mining of ore deposits under similar water bodies at home and abroad are studied by consulting the literature. In view of the mining technical conditions of Xinzhuang copper-lead-zinc mine, the key technical difficulties of the safe mining of the deposit are the reasonable setting of the safe thickness of the riser pillar, the reasonable mining sequence and the determination of the optimum mining method. The method of combining numerical simulation with theoretical analysis is used in this paper. Secondly, the hydrogeological conditions of ore body, aquifer and karst fissure water of the deposit are investigated and studied in depth, and the technical scheme of water control in the mine is determined. Thirdly, the factors affecting the aqueduct fissure zone are analyzed, and the safe thickness of the riser pillar is obtained by using the empirical formula method. Fourthly, according to the safety mining experience of similar mines at home and abroad and the specific mining technical conditions of this mine, the primary mining method is selected, and the optimal mining method is obtained through technical comparison, economic comparison and fuzzy evaluation. That is, the method of upward horizontal stratified cemented filling mining. Fifthly, using FLAC 3D numerical simulation technology, the mining sequence of ore deposit is simulated and studied, and the safe and reliable mining sequence is obtained, and the filling material test and the design of filling system are carried out. Finally, four stope of 303-8 #Li 14 #Li 403-5 #jiao 6 # of 鈪，

本文编号：2223568