摘要
为了探究杨村煤矿厚松散层薄基岩下提高开采上限问题,以330工作面为研究对象,通过对研究区第四系主要含隔水层富水性、底黏厚度分布和主采3煤层上覆基岩特征进行系统分析,确定该工作面可按防砂安全煤岩柱类型进行留设.同时收集整理分析了相邻兴隆庄和鲍店2煤矿3煤浅部提高开采上限的成果资料,结合杨村煤矿积累的相关经验,采用类比法对330工作面提高开采上限的可行性问题进行系统分析,探讨了3种开采工艺下垮落带高度计算量值和对应的保护层厚度.研究结果为该工作面按防砂煤岩柱类型进行安全开采的可行性试采方案提供了重要参考依据.
In order to study the problem of raising the mining upper limit under the thick loose layer and thin bedrock in Yangcun Coal Mine,the 330 working face is taken as the research background.By analyzing the characteristics of the quaternary system of main No.3 coal seam,which mainly contains water-barrier layer,water-rich,bottom clay distribution and overlying bedrock,it is determined that the working face could be reserved according to the type of safe coal and rock pillars for sand prevention pillar.Meanwhile,it collects two adjacent Xinglongzhuang Coal Mine and Baodian Coal Mine,their shallow mine,the No.3 coal seam of the data about the upper limit,combining the accumulation of data in Yangcun Coal Mine and by adopting the analogy method to improve mining upper limit of the 330 working face,the systematic analysis of the technical feasibility of the problem has been carried on,the calculated values of caving zone height and corresponding thickness of protective layer are discussed under three mining methods.The research results has provided important references for the feasibility of safe mining,according to the type of sand prevention pillar.
作者
张民
Zhang Min(Geological Survey Department,Yangcun Coal Mine,Yanzhou Coal Mining Co.,Ltd.,,Jining 272118,China)
出处
《矿业工程研究》
2020年第2期55-61,共7页
Mineral Engineering Research
基金
国家自然科学基金资助项目(41741020)。
关键词
薄基岩
巨厚松散层
提高上限
防砂煤柱
类比分析
thin bedrock
thick loose layer
upper limit mining
sand prevention pillar
analogy
