【摘要】 与马坪岭煤矿毗邻的某军工企业厂区附近发生地面塌陷,严重影响了企业的正常生产。为此需对马坪岭煤矿地面岩溶塌陷进行分析。通过收集资料与实地调查,认为地面塌陷是由于附近煤矿、老窑开采引发突水,长期疏干排水以及大量的抽取地下水造成的。为了以后能安全顺利开采,以-50m标高为界,根据老窑分布、地层岩性、未来采空区的涌水量,将开采区划分为水文地质条件复杂区和中等区。其中预测复杂区最大涌水量为1 792m3/h,易引发地面塌陷,目前不宜开采;中等区最大涌水量253m3/h,不易引发地面塌陷。并根据矿区构造特点,提出了在断层附近采取帷幕注浆方式,以减少断层导水性的预防措施。更多还原

【Abstract】 Surface subsidence had happened in a military industrial enterprise adjoining to the Mapingling coalmine,seriously impacted normal production of the enterprise.Through data collection and on-the-spot investigation,considered that the surface subsidence is caused by nearby coal mining induced water bursting,long-term drainage dewatering and groundwater pumping.For safely and smoothly mining henceforth,to take the-50m elevation as the boundary,divided the working area into hydrogeologically complex and medium two zones,based on gob distribution,lithology and water inflow from future gob area.The predicted maximum water inflow in the complex zone is 1792m3/h,easy to initiate surface subsidence,inadvisable to mine;while the maximum water inflow in the medium zone is 2533/h,not easy to initiate surface subsidence.According to mine area structural characteristics,fault nearby curtain grouting is advised,thus the preventing measure to reduce fault water conductivity.更多还原