第四系松散含水层下薄隔水层提高开采上限技术

Technology Of Improving The Upper Limit Of Coal Mining In Thin Water-resisting Layer Under The Quaternary Unconsolidated Aquifer

山东裕隆矿业集团单家村煤矿通过对六采区3煤提高开采上限的试验研究,在第四系含水松散层下薄基岩综放工作面的开采上限从-250m提高到-180m,实现了安全开采。在原矿井设计70m防水煤柱基础上,通过研究分析与现场勘探,确定留设45m防砂安全煤岩柱,取得了巨大的经济效益,并且为兖州矿区合理确定开采上限提供了科学依据。

In shanjiacun coal mine of Shandong yulong coal mining group, the mining limit of thin bedrock under quaternary unconsolidated aquifer increased from-250m to-180m, through the experimental research on 3#coal, and the fully-mechanized working face realized mining safety. Based on the original design of making 70m water-proof-pillars, through the research analysis and ifeld exploration, we determined to make 45m sand-proof-safety-pillars. In this way, great economic beneifts was made, and also a scientiifc basis was offered for making a reasonable mining limit in Yanzhou mining area.