Study For The Gushing Water Source In Pan Jiayao Coal Vice Inclined Shaft

Mine water gushing has been considered one of the most threatening disasters in the coal mine safety production process, which is one of the world’s coal-producing countries faced major mining problem, casualties and economic losses are the top three coal mine accidents, China’s coal geological conditions are complex, with the increase of mining depth, mining environment is becoming increasingly complex, the increase of water pressure and ground stress, the frequency of the gushing accidents increases occurred in the mining process.The occurrence of mine water inflow is effected by a variety of dynamic factors such as the geological structure、 hydro-geological conditions and mining conditions, any one single factor is insufficient to make a reasonable judgment to the law of the mine water inflow. Therefore, the mine water source issues must consider the integrated effects of various factors affecting the mine water inflow and the relationship between various factors under integrated effects, in order to more accurately determine the source of mine water gushing.The study of the source of mine water gushing generally proceed from the gushing water source and gushing channel to determine, only to find gushing water source and gushing water channel, it can be targeted to solve the mine water inflow. Thus, accurate discrimination of mine gushing watersource and gushing water channel is the key issues of the solution and further prevention of water gushing disaster, is the premise of the prevention and control of the mine water, which has great significance on the prevention of the gushing water accident and protection of the smooth progress of the coal safe mining.In order to better understand the hydrogeological conditions and characteristics of the study area, our studies include geological survey of the field hydrological, hydrogeological drilling, hydrogeological geophysical, hydrogeological tests and sampling water chemistry analysis. Through field hydrogeological investigation and analysis on the groundwater characteristics geological structure, stratigraphy lithology, geomorphology, hydrology, climate, vegetation of the study area, we basically identify the conditions of surface water, groundwater and the regional stress field of the study area. Hydrogeological drilling program designs10hydrogeological drilling, including2pumping test holes and8observation wells, It determines the burial depth thickness, lithology, porosity and distribution of the aquifer, the hydraulic connection between each aquifer and between aquifers and surface water bodies, realizes the groundwater level dynamic observations and supplys water samples for the next water quality analysis; Pumping test and carrying water test determines the characteristic curve of the test hole and the actual inflow calculates the hydrogeological parameters of the aquifer, and further determines the water aboundance of the aquifer; Hydrogeology geophysical determines the area where is full of water, provides a basis for analysis of the hydrogeological conditions; sampling and water chemistry analysis work studys the groundwater, the Seven Mile river and reservoirs and determines its chemical composition and water chemistry type.Firstly,through the tectonic stress analysis, we known that duing to the NW and NE trending compressive stress, Pingshuo mining formates313°,62°direction of joints, and98°,168°and27°,97°direction of the twogroup conjugate shear joints. According to the survey, there is a north east28°direction of the shear joints in the gushing water point,the joints cut through the Permian sandstone, mudstone, vice inclined shaft exactly exposes the fracture zone formed by the weathered sandstone joints, constitutes agushing water channel, makes the groundwater into the vice inclined shaft, and the groundwater formates the gushing water.According to the groundwater seepage field map, the water level of reservoir and the Seven Mile river are both high, groundwater flow from east, north to the West, South shows that the Seven Mile river and reservoir water lateral seepage recharge shallow groundwater, becoming the supply source of this department groundwater.Secondly, combining water chemical analysis with fuzzy clustering analysis, the paper compares the water chemistry background values of groundwater, the Seven Mile river and reservoir water, determines that the Seven Mile river, reservoir water and atmospheric precipitation are the gushing water source of Pan tianjiayao coal Vice Inclined Shaft and the Seven Mile river is its main source.Finally, this paper makes a multi-variable correlation analysis and calculation of the water bursting source and gushing water samping by gray correlation degree method,further analysises and validates the accuracy that atmospheric precipitation, the Qilihe river and reservoir water are the gushing water source of Pan tianjiayao coal Vice Inclined Shaft and the Seven Mile river is its main source.