Geophysical Survey Team of Shandong Province Coalfield Geological Bureau
Shandong Guanhe Group Co.
The Fifth Exploration Team of Shandong Province Coalfield Geological Bureau

为了查明鑫安煤矿开采3煤层的水害隐患类型,分析水害对矿井的潜在威胁和空间分布特征,采用现场质询、资料收集、井下踏勘的方法,逐一分析了煤矿大气降水及地表水、第四系砂砾层、新近系砂砾层、白垩系砂岩、3煤层顶底板砂岩、三灰、十下灰、奥灰、老空积水对3煤层开采的影响,排查分析出影响3煤层开采的水害隐患类型为3煤层顶底板砂岩、奥灰水和老空积水;采用“采后导水断裂带内含水层总厚度值”和“突水系数法”对开采3煤层的顶板砂岩充水危险性和底板奥灰突水危险性进行等级划分。研究分析出开采3煤层水害隐患的空间分布特征为3煤顶板水害主要影响矿井中部、老空水主要影响矿井浅部、奥灰水主要影响矿井东部。

In order to identify the types of water disasters hidden danger in the mining of the No.3 coal seam in Xin'an Coal Mine, analyze the potential threat and spatial distribution characteristics of water hazards to the mine, on-site questioning, data collection, and downhole exploration methods are used to analyze the influence of the atmospheric precipitation and surface water of the coal mine, the Quaternary sand and gravel layer, the Neogene sand and gravel layer, the Cretaceous sandstone, the sandstone on the roof and floor of the No.3 coal seam, the three ash, the tenlower ash, the Ordovician limestone, and the old goaf water accumulation on the mining of the No.3 coal seam one by one. The types of water disasters hidden danger that affect the mining of the No.3 coal seam are identified as the roof and floor sandstone, the Ordovician limestone water, and the old goaf water accumulation of the No.3 coal seam; Using the "total thickness value of the aquifer in the water conducting fracture zone after mining" and the "water inrush coefficient method", the risk of water filling in the roof sandstone and the risk of water inrush in the floor Ordovician limestone in the mining of the No.3 coal seam are classified into levels. It is studied and analyzed that the spatial distribution characteristics of water disasters hidden danger in the mining of the No.3 coal seam are as follows: the water hazards in the roof of the No.3 coal seam mainly affect the central part of the mine, the old goaf water mainly affects the shallow part of the mine, and the Ordovician limestone water mainly affects the eastern part of the mine.