摘要
在新疆喀拉通克铜镍矿开展"开采环境再造深孔诱导崩矿充填采矿法"工业试验的过程中,将传感器预埋到人工结构中,构建了远程自动监测系统,根据监测数据分析了人工结构在矿体回采过程中的稳定性。结果表明:传感器位置的选择应结合采矿工程的特点,对人工结构进行受力情况分析后,将其布置在关键部位;进路内各测点的应力变化总体趋势是压应力逐步向拉应力的方向发展,但随采矿扰动减小,各应力状态趋于平稳,其中最大拉应力为0.83 MPa,小于C20混凝土的抗拉强度1.1 MPa,安全系数为1.32,且进路内布置的钢筋网可进一步提高抗拉强度,保障其结构稳定性;进路内各测点的位移不同程度地出现增大的趋势,随采矿扰动减小,各测点的位移发展很缓慢,测点中最大位移量达到44.1 mm,但在319 d之后此点位移变化很小,变形速率由0.103 5 mm/d降至0.010 7 mm/d,趋于稳定的状态,现场生产中应加强对此点的长期监测和控制其稳定性,保证安全生产。
The paper is inclined to examine and test the stability of a rebuilt artificial structure in the mining environment via the remote automatic monitoring procedure by taking the deep-hole induced caving and filling in the mining environment regeneration in Kelatongke coppernickel mine in Xinjiang as a case study sample.As a matter of fact,the above said mine set up the remote automatic monitoring system and began to experiment with＂the method of deep-hole inducing caving and filling in the mining environment regeneration＂in the mine,with the sensors being embedded in the artificial structure.And,since then,we have begun to analyze the stability of the artificial structure in the ore mining process under the support of the monitoring data.The monitoring results we have gained show that it is necessary to choose to embed the sensors in the key points by taking into full account the characteristic features of the mining engineering convenience,such as the stress situation of the artificial structures and the key measuring,testing and indicative points of the sensors in favor of the long-time forthcoming operation and monitoring activities.Although the overall trends of the stress change of all the incoming routes develop from the compressive stress gradually towards the tensile stress,the different kinds of stress tend to become smooth and get stabilized with the decrease of the mining disturbance and/or interference,so that the greatest tensile stress should be equal to 0.83 MPa,which can even be taken as less than 1.1MPa of the anti-tensile strength of C20 concrete,whose safety coefficient is equal to 1.32.Furthermore,since the steel mesh is distributed evenly in them,it may help to improve the anti-tensile strength,so that the stability can properly be ensured.Furthermore,since the displacement of the inner measuring point of each incoming route tends to increase more or less to some extent,the displacement of each measuring point can only be going on very slowly with the decrease of the mining disturbance.To be exact,the maximum displacement can be no more than 44.1 mm.In such a situation,even if the deformation rate may change a little in a period of 319 d later,say,from 0.103 5 mm/d to 0.010 7mm/d,the artificial structure still tends to remain stable.Hence,needless to say,in the mining field production,its stability remains necessary to be monitored from the long-term point of view and timely controlled so as to ensure the safety needed for the mining production.
出处
《安全与环境学报》
CAS
CSCD
北大核心
2017年第6期2146-2151,共6页
Journal of Safety and Environment
关键词
安全工程
采矿环境再造
人工结构
传感器
远程自动监测
稳定性
safety engineering
mining environment regenera-tion
artificial structure
sensor
remote automaticmonitoring
stability
