厚松散层薄基岩条件下提高开采上限的研究

摘要

为最大限度地提高煤炭采出率，以岱庄煤矿为工程背景，采用现场勘探、数值模拟和理论分析综合研究方法，对第四系后松散层薄基岩下的43下20工作面提高开采上限可行性进行了分析。现场应用表明，本工作采高为2.5 m ，按中硬岩层设计防水煤柱高度为46.3 m ，取得了良好的经济效益。此设计对相同地质条件下安全煤岩柱的尺寸设计提供了借鉴意义。%Taking Daizhuang Colliery as engineering background ,based on a comprehensive research method of on-site exploration ,numerical simulation and theoretical analysis ,the paper analyzed the feasibility of impro-ving upper limit of mining at 4320 working face under thick alluvium thin bedrock .Field studies show that min-ing height is 2 .5m ,waterproof coal pillar height is 46 .3m .The design achieved good economic efficiency and provided reference for the size design of safe rock pillar under similar geological conditions .