矿区地表岩移与地裂缝分布动态监测分析

Dynamic monitoring and analysis of surface rock movement and ground fracture distribution in mining area

甘肃某矿二矿区随着生产的不断扩大,矿区内修建基础设施,对山体开挖形成的边坡,受爆破扰动,出现崩塌、滑坡等危害直接影响着矿区的绿色发展,严重影响了施工安全和开采进度。本文采用GPS监测系统对该矿区地表岩移和地裂缝的分布和扩展特征进行了实时监测。监测结果表明该矿区垂直位移、水平位移及三维位移随着时间的推移,逐年呈近线性递增趋势。自2001年开始监测以来十六年半时段累计沉降量达1198 mm,水平位移量达519 mm,三维位移量达1402 mm。地裂缝拉张方向相对位移量最大值为349 mm(F4),最小值为18 mm(F6);水平方向相对位移量最大值为418 mm(F9),最小值为8 mm(F5);沉降方向相对位移量最大值为410 mm(F4),最小值为5 mm(F5)。本研究为矿山安全管理提供参考依据。

With the continuous expansion of production in the second mining area of a certain mine in Gansu province,the construction of infrastructure facilities in the mining area directly affects the green development of the mining area and seriously affects the construction safety and mining progress as well as the hazards such as collapse and landslide caused by blasting disturbance to the slope formed by mountain excavation.In this paper,GPS monitoring system is used to monitor the distribution and propagation characteristics of surface rock movement and ground fractures in the mining area in real time.The monitoring results show that the vertical displacement,horizontal displacement and 3D displacement of the mining area increase nearly linearly with time year and year.Since the monitoring started in 2001,the accumulated settlement amount in the 16 and a half year period has reached 1198 mm,the horizontal displacement amount has reached 519 mm,and the three-dimensional displacement amount has reached 1402 mm.The maximum value of relative displacement in the tensile direction of ground fractures is 349mm(F4),and the minimum value is 18mm(F6).The maximum relative displacement in the horizontal direction is 418mm(F9),and the minimum is 8mm(F5).The maximum value of relative displacement in the settlement direction is 410 mm(F4),and the minimum value is 5 mm(F5).The research results provide a basis for mine safety management.