兴隆庄煤矿下组煤第一勘探区奥灰疏降水量数值模拟

奥灰水是兴隆庄煤矿石炭系太原组16、17煤（下组煤）开采的主要水害威胁和重点防治对象。在大规模水文地质勘探和深入分析研究区水文地质条件的基础上,精细模拟了下组煤首采区、中部、深部采区奥灰疏降水量及降至安全水头所需时间。模拟结果显示：首采区17煤奥灰疏降水量为2 050m3/h,降至安全水头所需时间约180d;中部采区16、17煤奥灰疏降水量分别为2 800m3/h、4 650m3/h,降至安全水头所需时间均约120d;深部采区16、17煤奥灰疏降水量分别为1 080m3/h、1 770m3/h,降至安全水头所需时间亦均约120d。综合分析认为,该疏降水量符合模拟区的实际水文地质条件,可以作为下组煤开采水平或采区防排水能力设计的依据。

Water Discharge Numerical Simulation of Ordovician Limestone Dewatering for Lower Coal Group in No.1 Exploration Area,Xinglongzhuang Coalmine

The Ordovician limestone water is the main water disaster threat and the key controlling object.Based on extensive hydrogeological exploration and analysis in the study area,nicely simulated lower coal group in initial,middle and deep winning districts Ordovician limestone water discharges and time needed for lowering down to safety water head.The simulated results have demonstrated that： for No.17 coal seam in initial winning district,the water charge is 2050m3/h,time needed for lowering down to safety water head is 180 days;for Nos.16 and 17 coal seams in middle part the figures are 2800m3/h and 4650m3/h respectively and 120 days each;both coal seams in deep part are 1080m3/h and 1770m3/h respectively and 120 days each.The overall analysis considers that these water discharges accord with actual hydrogeological condition in simulated area,these can be the basis for lower coal group mining level and winning district water discharge capacity design.