考虑煤矿采空区和岩溶影响的某拟建场地适宜性研究

Study on Suitability of a Proposed Site Considering Coal Mine Goaf and Karst

选取受到煤矿采空区与岩溶双重影响的河北省唐山市某建筑场地为研究对象,借助详细地面调查、钻探、物探、气体检测等综合手段,分析了场地工程地质条件与工程地质问题,研究结果表明,场地位于开滦集团赵各庄矿西翼及地方煤矿老采空区上,地表移动明显,另外还存在煤自燃现象与岩溶,因此场地属于建筑抗震不利地段,场地的整体稳定性差,适宜性差,建议采用加注氮气灭火、注浆加固裂隙带、封堵钻孔等措施进行不良地质现象的治理。

A construction site in Tangshan City,Hebei Province,which is affected by coal mine goaf and karst, was selected as the research object. The detailed engineering grounds,drilling,geophysical exploration and gas detection were used to analyze the site engineering geological conditions and engineering geological problems. It shows that the site is located in the west wing of the Zhaogezhuang Mine of Kailuan Group and the old goaf of the local coal mine;the surface movement is obvious;in addition,there are coal spontaneous combustion phe- nomenon and karst. Therefore,the site belongs to the earthquake-resistant area of the building,and the overall stability and the suitabiling of the site is poor,it is recommended to use nitrogen injection fire,grouting to strengthen the fracture zone,plugging holes and other measures to control the adverse geological phenomena.