Structural Characteristics And Control Mech Anism On Mine Water In Qinglong Coalmine

Comprehensive use of the principles and methods of structural geology, hydrological geology, geochemistry and mathematical geology, based on the analysis of regional tectonic evolution, and the systematic observation and measurement on the typical structure of the field and the mine, it reveals the characteristics and different tectonic superposition and transformation rules of tectonic deformation hrough the systematic measurement and analysis of joints and combining the geological characteristics of aquifer and aquifuge, and analysis of water filling condition. In-depth study of the mine hydro geological boundary condition and the boundary fault control mechanism of water; the groundwater dynamic field characteristics analysis in Changxing formation of karst fissure water flow field for example constructed hydrological geological and mathematical model and numerical model, through model computing, it reveals the mine dynamic characteristics of groundwater; using the system cluster analysis and Bayes discriminant analysis of the water chemistry characteristics of mine in different tectonic positions, we discussed the region and the geological structure in coal mine water control, main conclusions are as follows:The folds in the area are relatively developed, mainly for large broad and gentle fold,(Ge lao zhai anticline, Da chong anticline, Dingjiazhai syncline), reverse fault teaction folds(F3 reverse fault fold structure, F4 reverse fault fold structure, F10 reverse fault fold structure), flexural and interlaminar uncoordinated fold, mainly developed in the central and southwest of study area. Mine fault structure is well developed by the regional tectonic control to the NE trending faults(F1 F5, F22), these fault share the characteristics of large scale long extension and big dip angle, reverse faults have developed; The primary fault structure is treanding EW to NW, the scale and extension smaller than the main fault, and its dominated by reverse faults. Small faults are very developed, the majority drops of these fault are amoung 0.5 ~ 10 m. Mine structure is not disorganized, mainly including arranged in parallel, between faults associated combination, between the faults cross combination fault fold between interaction cutting combination way.Nearby 5 exploration line existing watershed. In the south of watershed, the representative water points is 9# water cave and 13# spring points;and atmospheric precipitation is one of the water supply to these water point. Concentrated supply and surface supply feed the water in these area, and concentrated supply contribute the most. Accepting these supply the water excretion in 13 spring. In the north of the Watershed, after accepting the supply, the groundwater excretion from 59# spring in the southwest coast of tuomei river.Take flow field of Changxing karst fissure group as an example, constructed mathematical model and numerical model of hydrological geology. Results show, under natural conditions, the ground water movement direction is mainly from SE to N. and the flow direction is controlled by the boundary conditions. Deep in the mine field the boundary condition is changed, groundwater is in stagnant condition, formed a watershed in the vicinity of the exploration line 5; underground water Ling moved to the south, simulation calculated in the second panel predicted normal water inflow for 362m3/h. Water stable isotope tracer analysis showed that direct hydraulic connection less likely to exist between the surface water and underground water. F1 branch fault and the F2 branch fault leading to different levels of coal seams with aquifer, It has a great influence on the the coal mine production.Sample cluster analysis and Bayes discriminant analysis showed that the Qinglong Coal mine hydrogeological characteristics were controlled by tectonic action. The independence of the aquifer group is better than aquifuge. Only the local appearance of the individual samples showed a near distance from the remaining two aquifer groups, which may be caused by the fracture structure which caused the aquifer group to have hydraulic contact.Regional tectonic control of the aquifer formation, in study area limestone karstic fissure aquifer formation is closely related to the Caledonian cycle, Mesozoic tectonic movement were strongly modified the aquifer system. Regional tectonic control containing water group formation and evolution is related to Guizhou north coalfield geological history three important tectonic cycle(during the Caledonian cycle. Yanshan and Himalayan cycle) has a direct relationship, the three times of tectonic cycles controlled the distribution pattern of water containing. Minefield structural control of mine water boundary and mine containing water hydraulic connection. ida SW and NW have F1, F2, F2, F3 four main faults distribution, constitutes a Ida SW and NW natural boundary. Between the Yulong Mountain limestone and Changxing Limestone sand castle Bay across the layer thickness is small. When the fault throw is greater than the sand castle Bay formation thickness, Yulongshan section of limestone and Changxing Limestone counterpart contact, containing water hydraulic connection.Combined with water chemical characteristics and tectonic location known, the nature boundary of the western Qinglong coalfield, fault F1 formed conducting water channel. Conformed Conducting path.to Changxing Formation karst fissure and Longtan Formation fracture aquifer. F22 inverse fault is located in the north of Qinglong coal field. Surface aquifer may supply ground water to deep aquifer through F22 fault, provide communication path between different layer group. F4 reverse faults is in thethe west of mine field, and the west is branch of F2, F2 fault cutting, submitted to the fault F1 and fault F4 is water conductive fault.F3 reverse fault is located in the south of Qinglong coal field, may communicate different aquifer group of water conducting channels.