Research On The Form Mechanism Of Left-over Areas Water And Disposal Technology

In1980s, lots of small coal mines used the mining systems of room and room-pillar, the recovery rate was only10%-30%, which led to serious resources loss. The effective way to solve the problem of high-quality coal shortage is to recycle the remaining coal resources. But because the hydro-geological conditions of left-over areas mining is complex and the mechanism of mine goaf water is unclear, bring great threat for the safety of coal mine production.Research on the form mechanism of left-over areas water and disposal technology were studied in detail by theories and by means of hydrogeology, mine pressure and numerical simulation in this dissertation.By the analysis of the supplied water-source, supplied water-pathway, and accumulated water-inter space, the mechanism of goaf water was studied systematically. The studies show that its water-source supplied consists of meteoric water source, loose aquifer source, sandstone aquifer source and ete. Its water-pathway supplied consists of the inner collapsed zone, the permeable fractured zone, pitfall, faulted zone, unfavorable enclosed drill hole and so on. The combination of2-3types may be fallen across in most of the mine. Goaf water is located at the low-level position of goaf coal layer bottom bed; mostly at the inner collapsed zone and that has phreatic water character, other one at the permeable fractured zone and that has confined water character. The form of goaf water is a process of dynamic diversification under the coupling action among seepage, stress and surrounding rock. The formation of goaf water is a process of dynamic diversification. The research show that there are multi-formation for goaf water mechanism, under dissimilar geological, hydro-geological conditions.Study the waterproof coal pillar setting of left-over areas of mining and sealing technology, in mine production practice integrative the two method should be adopt.Finally, the prediction means of goaf water and technique measure of water divine discharge was studied. Conditions in point and localization in existence for the whole bag of tricks were proposed by the research on the field-tested data analytical method, locate inquisition, drilling method, geophysical prospecting method, and numerical calculating method. Mine production practice show that integrative method should be adopt in order to forecast goaf water well and truly.