重庆茶园煤矿扩能技改斜井岩溶发育情况分析

Capacity Expansion Revamping Incline Karst Development Situation Analysis in Chayuan Coalmine, Chongqing

茶园煤矿为水文地质复杂型矿井,开采二叠系吴家坪组近底部K1煤层。矿井充水水源主要为大气降水,补给途径为岩溶裂隙与暗河。该技改扩能明斜井将穿过二叠系嘉陵江组(T1 j)、大冶组(T1d)和长兴组(P2c)三个岩溶裂隙含水层。从已有采掘工程、矿区地形地貌、物探结果、接触面岩溶发育情况等方面对这三个含水层进行了分析对比,得出了该矿扩能技改斜井井筒在开凿期间遇暗河岩溶水的可能性很小,但可能会遇到岩溶裂隙水的结论。并制定相应的防治水措施。实际揭露情况表明,该斜井掘进期间,井筒实际涌水量为15m3/h以内,与分析结果基本吻合。证明其分析方法正确,结论可靠,对煤矿水害的防治具有指导意义。

Hydrogeological condition is complex in the Chayuan coalmine; mining target is coal K1 near bottom of Permian Wujiaping Formation. Main coalmine water filling source is atmospheric precipitation, recharging channels have karst fissures and sunken streams. The capacity expansion revamping open incline cuts through Permian Jialingjiang Formation （T1j）, Daye Formation （T1d） and Changxing Formation （P2c） karst fissure aquifers. From aspects of existing excavation engineering, mine area relief and topography, geophysical prospecting data, contact zone karst development situation etc. carried out contrasting analysis for these three aquifers, found out the intersecting possibility of sunken stream karst water is very small during the incline excavating, but may encounter karst fissure water. Corresponding water control measures have been drawn up. Actual revealed status has shown, during the incline excavation, actual shaft water inflow is within 15m^3/h, basically tally with analytical results. Thus proved the analytic method is correct, conclusion reliable, has guiding significance in coalmine water hazard control.