摘要
煤矿覆岩中的关键层控制着上覆岩层的移动和采动裂隙的动态发展过程,进而也必将影响到邻近层瓦斯在采动破裂岩体内的动态涌出规律。利用阳泉矿区2种不同覆岩结构综放面的实测数据,对比研究关键层运动对邻近层瓦斯动态涌出的影响,研究结果表明:不同覆岩关键层结构条件下,邻近层瓦斯涌出的动态过程是不一致的,进一步证实了关键层运动对邻近层瓦斯动态涌出的控制作用。分析不同覆岩关键层结构条件下初采期邻近层瓦斯抽采技术方案的适应性,提出初采期邻近层瓦斯抽采方案的确定必须结合具体覆岩关键层结构特征,才能取得预期的抽采效果。
The key strata control the process of the overlying strata movement and the dynamic expanding of the mining-induced fracture in coal mining stope,and then it will influence the gas dynamic emission of the adjacent layers in the mining-induced fractured rock mass.Based on the in-situ data of two fully-mechanized top-coal caving faces in different overlaying strata in Yangquan Coal Mines,the influences of key strata movement on the gas dynamic emission of the adjacent-layers are comparatively studied.The results show that the dynamic processes of the gas emission of the adjacent-layers in the different overlaying key strata are different,which has further verified the dynamic control of the key strata on the gas emission of the adjacent layers.The applicability of the gas extraction way of the adjacent layers in different overlaying key strata at the initial mining stage is also analyzed.It is put forward that,in order to improve the gas extraction efficiency,the actual overlaying key strata should be considered before the decision of the gas extraction way of the adjacent layers at the initial mining stage.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2007年第7期1478-1484,共7页
Chinese Journal of Rock Mechanics and Engineering
基金
国家自然科学基金资助项目(50374066)
教育部"新世纪优秀人才支持计划"资助项目(NCET–05–0478)
关键词
采矿工程
岩层移动
关键层
煤与瓦斯共采
邻近层瓦斯涌出
mining engineering
strata movement
key strata
co-extraction of coal and gas
gas emission of adjacent layers
