孟巴矿突水事故原因与快速治理技术

Mine Water Inrush Accident Cause and Rapid Control Technology of Barapukuria Coal Mine

基于孟加拉国巴拉普库利亚煤矿(简称孟巴矿)突水淹井治理实例,据各阶段勘探结果、大井水位降升试验及大型水文观测结果,分析研究了该矿井底车场突水发生的水文地质结构和突水原因与机理,判断突水水源主要来自于煤层顶板砂岩和特厚Ⅵ煤层弱-偏中等含水层,由UDT强含水层北部天窗区顺层补给。对帷幕封堵+突水点注浆、突水点注浆、强排复矿+挡水墙3种治水复矿技术方案进行了优缺点比较,提出了强力排水、突水点附近建立挡水墙、井下钻孔注浆封堵突水点的优选水害治理方案。通过治水工程的有效实施,在4个月内快速恢复了被淹矿井。

Based on the mine water inrush and mine flooded case occurred in Barapukuria Coal Mine,Bangladesh,according to the exploration results of each stage,the large water well water table dropping test and the large hydrological observation results,the paper analyzed and studied the hydrological structure and the water inrush cause and mechanism of the mine water inrush occurred at the mine shaft bottom.The water inrush sources were mainly come from the roof sandstone of the seam and the aquifer of ultra thick Ⅵ seam as judged The UDT high aquifer at North Skylight Zone would supply water to the aquifer in Ⅵ seam along the seam direction.A comparison was conduced on the three technical plans,such as the curtain sealing ＋ water inrush point grouting,the water inrush point grouting and the enforced water drainage ＋ water dam.Finally the optimum water disaster control plan with enforced water drainage,water dam set near the water inrush and underground drilling and grouting to seal the water inrush area.With the effective practices of the water control project,the flooded mine was rapidly recovered within 4 months.