山东煤炭科技2026，Vol.44Issue(8)：5-11,7.DOI:10.3969/j.issn.1005-2801.2026.08.002
工作面开采覆岩破坏高度预计分析及防砂煤(岩)柱尺寸确定
Prediction Analysis of Overburden Rock Failure Height and Size Determination of Sand Control Coal(Rock)Pillar in Working Face Mining
马坡 1赵克刚 1何承贵1
作者信息
- 1. 枣庄矿业集团高庄煤业有限公司,山东 济宁 277605
- 折叠
摘要
Abstract
Aiming at the sand control and water prevention problems of the 33lower06 working face in Gaozhuang Coal Industry,which was located in the Quaternary thick loose layer-thin bedrock condition,the"two zones"prediction formula of overburden rock and the actual measured data of the 3lower301 working face were comprehensively adopted to analyze the development heights of the overburden rock collapse zone and water conducting fissure zone in the 3lower coal under the condition of mining height of 3.0-4.6 m.The results indicate that the water richness of aquifers in the lower section of the Quaternary Lower Group was weak,and the water isolation property of the bedrock weathering zone was good,which basically doesn't pose a water(sand)threat to the working face;The collapse zone heights under different mining heights were about 16.69-43.61 m,and the heights of water conducting fissure zone were about 41.4-59.8 m.After taking into account the 20 m depth bedrock weathered aquifer zone,the minimum height of the sand control coal(rock)pillar was 46-78 m.The working face mining height should be determined by zoning according to the mining range of the 3upper coal seam and the local bedrock thickness.In sections where the bedrock thickness doesn't meet the corresponding coal(rock)pillar retention requirements,the mining height should be reduced or protective coal bodies should be retained.This comprehensively considering the close distance coal seam repeated mining,the overburden rock failure height,and the depth of the weathered aquifer zone of the bedrock,can provide reference for the sand control coal(rock)pillar retention and mining height determination under similar thick loose layer-thin bedrock conditions.关键词
防砂煤柱/覆岩破坏高度/采高条件/工作面地质条件/安全开采Key words
sand control coal pillar/overburden rock failure height/mining height condition/working face geological condition/safety mining分类
矿业与冶金引用本文复制引用
马坡,赵克刚,何承贵..工作面开采覆岩破坏高度预计分析及防砂煤(岩)柱尺寸确定[J].山东煤炭科技,2026,44(8):5-11,7.
