摘要
为确保移动带内地表村庄、河流、道路的安全,同时最大限度地开采地下资源,结合某金矿大断裂带构造条件下采用尾砂胶结充填采矿法的工程实例,运用概率积分法理论计算出的矿山安全开采深度为108 m,小于覆岩厚度(130 m),满足安全开采要求。采用FLAC3D数值模拟方法对该矿"三下"开采移动范围内典型剖面的地表沉降进行了分析,经计算,最大倾斜变形为0.022 mm/m、最大水平变形为0.019 mm/m,与地表实测数据较接近,满足建(构)筑物保护等级要求。根据矿山井下爆破工程特点,计算出的矿山最大爆破安全允许距离为96 m,认为矿井爆破振动不会影响至地表。研究表明:该矿"三下"开采移动带内地表建(构)筑物安全稳定,对于该矿安全高效开采以及类似矿山开采移动带范围内的地表稳定性分析有一定的参考价值。
In order to ensure the safety of surface villages,rivers and roads within subsidence basin and to maximize the exploitation of underground resources,and combing with the tailings cemented filling mining method under the structural condition of a large fault zone in a gold mine as a case,the safe mining depth of the mine is calculated as 108 m by using the theory of probability integral method,which is less than the thickness(130 m)of overburden rock and can meet the requirement of safety.The surface subsidence of a typical section within the movement range of "three-under" mining in a gold mine is studied and analyzed by FLAC3 Dnumerical simulation method. Based on the calculation results it is show that the maximum inclined deformation is 0.022 mm/m and the maximum horizontal deformation is 0.019 mm/m.The deformation valus are close to the measured data,which meets the requirements of protection grade for buildings and structures. According to the characteristics of underground blasting engineering,the maximum allowable distance of blasting is calculated as 96 m,and the blasting vibration will not affect the surface. After the comprehensive analysis,it is concluded that the surface structures within the subsidence basin in the gold mine are safe and stable,which can provide reliable reference for the safety and efficiency production of the mine and the surface stability analysis of mining movement zone of similar mines.
作者
程立年
李晓刚
叶振华
孙秀柱
Cheng Linian;Li Xiaogang;Ye Zhenhua;Sun Xiuzhu(Sinosteel Maanshan Institute of Mining Research Co.,Ltd.,Maansfian 243000,China;State Key hiboraton of Safety andHealth for Metal Mines,Maanshan 243000,China;Huawei National Engineering Research Center of High Efficiency CyclicUtilization of Metal Mineral Resources Co.,Ltd.,Maanshan 243000,China;Anhui Academy of Coal Science,Hefei 230001,China)
出处
《金属矿山》
CAS
北大核心
2019年第3期56-61,共6页
Metal Mine
关键词
“三下”开采
地表稳定
概率积分法
安全开采深度
数值模拟
爆破振动
“Three under”mining
Surface stability
Probability integral method
Safe mining depth
Numerical simulation
Blasting vibration
