胶西北海岸带海底基岩矿床开采海水入浸防治

Prevention and Control of Seawater Leaching from Seabed Bedrock Ore Deposit Miningin Northwest Coastal Zone of Jiaozhou

海底基岩矿床顶部分布着大面积的海水,开采过程中存在海水突入矿坑问题。以胶西北海岸带区域为研究背景,对矿坑涌突水的影响因素及涌水量进行分析,并提出防治措施。结果表明,自然灾害、开采活动、孔隙含水层是导致矿坑涌突水主要原因;提出了留设保安护顶矿(岩)柱,钻孔注浆,加强地表防海水入浸配套设施建设,提高井下排水系统能力,构筑防水闸门等措施。胶西北海岸带海底金矿开采时-165m标高以上设为保安护顶矿柱是安全的,北皂煤矿-200m以上设为保安护顶矿柱是安全的;海底金矿极限开采高度为-65~-87.2m,北皂煤矿极限高度为-120~-160m,可以作为整个海底矿床开采完毕后回采保安护顶矿柱时的参考依据。

A large area of seawater is distributed at the top of the seabed bedrock deposit,and there is a problem of seawater bursting into the mine during mining.Based on the research background of the northwest coastal zone of Jiaodong,the influencing factors and water inflow of mine water inrush are ana⁃lyzed,and the control measures are put forward.The results show that natural disasters,mining activities and porous aquifers are the main causes of water inrush.Some measures are put forward,such as setting up security to protect the top mine(rock)pillar,drilling and grouting,strengthening the construction of sup⁃porting facilities to prevent sea water infiltration on the surface,improving the capacity of underground drainage system and building waterproof gates.During the mining of the seabed gold mine in the northwest coastal zone of Jiaotong,it is safe to set the security roof pillar above-165 m elevation,and it is safe to set the security roof pillar above-200 m in Beizao Coal Mine.The ultimate mining height of the submarine gold mine is-65~-87.2 m,and that of the Beizao Coal mine is-120~-160 m,which can be used as a refer⁃ence for the mining of the whole submarine deposit after the mining is completed.