【摘要】：江西省宜豐萬國礦業(yè)有限公司(新莊銅鉛鋅礦)屬于以溶洞為主的水文地質(zhì)條件復雜的巖溶充水礦床。開拓方式及回采順序的布置、采礦方法的選擇、隔水礦柱的安全厚度的留設、充填系統(tǒng)的建立不僅是解決此類礦床安全開采的關鍵,還是采場上覆巖層變形、移動和非連續(xù)性破壞造成上覆含水層和地表塌陷、開裂等安全事故的原因。本文針對新莊銅鉛鋅礦巖溶充水礦床開采技術條件,采用理論分析、調(diào)查統(tǒng)計、模糊數(shù)學理論、FLAC 3D數(shù)值模擬相結合的方法進行水體下安全開采關鍵技術的深入分析和綜合研究。首先,通過對文獻的查閱,研究國內(nèi)外類似水體下礦床安全開采的關鍵技術。針對新莊銅鉛鋅礦的開采技術條件,分析該礦床安全開采關鍵技術難點為合理的隔水礦柱安全厚度的留設、合理的開采順序及最優(yōu)采礦方法的確定,采用數(shù)值模擬與理論分析相結合的方法進行了深入的研究。其次,對該礦床礦體賦存條件、含水層及巖溶裂隙水等水文地質(zhì)條件進行了深入的調(diào)查研究,確定了該礦山防治水技術方案。第三,分析了影響導水裂隙帶的因素,運用經(jīng)驗公式法得出了隔水礦柱的安全厚度。第四,根據(jù)國內(nèi)外同類礦山安全開采的經(jīng)驗和本礦山具體的開采技術條件,初選了采礦方法,并通過技術比較、經(jīng)濟比較以及模糊評判得出了最優(yōu)的采礦方法,即“上向水平分層膠結充填采礦法”。第五,運用FLAC 3D數(shù)值模擬技術,對礦床的開采順序進行了模擬研究,得出了安全可靠的礦床開采順序,并進行了充填材料試驗及充填系統(tǒng)的設計。最后,選擇Ⅱ3礦體的303-8#、14#、403-5#、6#等4個采場作為試驗礦塊進行了現(xiàn)場工業(yè)試驗,對采準切割工藝、回采工藝及充填工藝進行了深入的研究,并進行了試驗效果及效益的分析,取得了良好的試驗效果。
[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，

本文編號：2223568