摘要
榆神矿区东部河兴梁井田2^(-2)煤层埋藏浅,沿煤层露头多发生自燃现象,形成烧变岩。为研究2^(-2)煤层烧变岩赋存规律及其对下伏煤层开采的影响,采用烧变岩露头剖面测量、地质钻探、抽水试验等手段,研究了2^(-2)煤层烧变岩的赋存规律、水文地质特征,以及烧变岩水对下伏煤层开采的影响。结果表明:榆神矿区东部河兴梁井田2^(-2)煤层煤烧变岩呈条带状状分布,自下而上形成熔融岩带、烧结岩带和上部烘烤岩带。烧变岩孔洞、裂隙极其发育,厚度2.95~50.31m,烧变岩含水层以强富水性为主。3^(-1)煤层开采后导水裂缝带发育高度基本导通至烧变岩含水层,可能会导致矿井突水、溃沙灾害,对矿井安全生产有较大隐患。提出在烧变岩分布区采用完全充填开采方式开发3^(-1)煤层,实现安全开采的目的。
The 2^(-2)coal seam in the Hexingliang mine field in the eastern part of Yushen mining area is shallowly buried,and spontaneous combustion often occurs along the coal seam outcrop,forming burnt rock.To study the occurrence law of burnt rock in the 2^(-2)coal seam and its impact on the mining of the underlying coal seam,methods such as burnt rock outcrop profile measurement,geological drilling,and pumping tests were used to investigate the occurrence law,hydrogeological characteristics,and the influence of burnt rock water on the mining of the underlying coal seam in the 2^(-2)coal seam.The results show that the coal burnt rock of the 2^(-2)coal seam in the Hexingliang mine field in the eastern part of Yushen mining area is distributed in a strip like manner,forming a molten rock zone,a sintered rock zone,and an upper baked rock zone from bottom to top.The pores and fissures of the burnt rock are extremely developed,with a thickness of 2.95~50.31m.The aquifer of the burnt rock is mainly rich in water.After the mining of the 3^(-1)coal seam,the development height of the water conducted zone is basically connected to the burnt rock aquifer,which may cause water and sand inrush disasters in the mine,posing a significant risk to the safety production of the mine.Propose to use fully filled mining method to develop the 3^(-1)coal seam in the burnt rock area,in order to achieve the goal of safe mining.
作者
李瑾
李明培
冯喜珍
LI Jin;LI Mingpei;FENG Xizhen(Xi’an Research Institute Co.Ltd.,China Coal Technology and Engineering Group Corp.,Xi’an,Shaanxi 710054;Innovation Technology Research Institute of Shaanxi Investment Group Co.,Ltd.,Xi’an,Shaanxi 710061;School of Geology and Environment,Xi’an University of Science and Technology,Xi’an,Shaanxi,710054;Shaanxi Hejiata Coal Mine Co.,Ltd.,Yulin,Shaanxi 719314)
出处
《中国煤炭地质》
2025年第1期7-9,26,共4页
Coal Geology of China
基金
国家自然科学基金项目“腐殖酸介入采空区水-煤/岩系统中氟释放与迁移转化动力学机制”(42307113)。
关键词
保水采煤
烧变岩
水文地质特征
导水裂缝带
开采影响
河兴梁井田
water-preserved coal mining
burnt rock
hydrogeological characteristics
water conducted zone
mining impact
Hexingliang mine field
