摘要
在对煤矿采区地表建(构)筑物进行开采沉陷预测时,应采用一套尽可能符合该采区地质条件的岩移预计参数,不至于过高或过低估计地表沉陷程度及建(构)筑物的损坏等级,从而为开采规划方案制定和地表建(构)筑物保护提供可靠依据。利用济宁二号煤矿十一采区辽沟河堤沉降观测站的长期观测资料,根据最小二乘原理,应用曲线拟合方法,初步获得了大采深、厚冲积层和巨厚岩浆岩条件下的概率积分法开采沉陷岩移预计参数,即:下沉系数q=0.65,水平移动系数b=0.45,主要影响角正切tanβ=1.4,开采影响传播角θ=90°-0.6α(α为煤层倾角),拐点偏移距s=0.05H(H为采深),重复采动系数为1.1。所给出的岩移预计参数对于类似地质条件下地表开采沉陷预计有一定的参考价值。
When predicting mining subsidence of surface structures in coal mining area,a set of rock displacement prediction parameters should be adopted to meet the geological conditions of the mining area as far as possible,so as not to overestimate or underestimate the degree of surface subsidence and the damage grade of buildings,to provide reliable reference for the formation of mining planning scheme and protection of surface structures.Based on the long-term settlement observation data of Liaogou embankment settlement observatory station in No.11 mining area of Jining No.2 Coal Mine and the least square principle and curve fitting method,the prediction parameters of probability integral method of mining subsidence rock displacement under the conditions of large mining depth,thick alluvium and huge thick magmatic rock are preliminarily obtained.The study results show that coefficient of subsidence q=0.65,horizontal displacement coefficient b=0.45,tangent of major influence angle tanβ=1.4,mining influence propagation angle θ=90°-0.6α(α is defined as the dip angle of coal seam),offset of inflection point s=0.05 H(H can be defined as mining depth),repeated mining coefficient is 1.1.The above prediction parameters of rock strata movement determined in this paper can provide reliable reference for the further mining subsidence prediction of the mining area under the similar geological conditions of the No.11 mining area of Jining No.2 Mine.
作者
姜希印
田迎斌
Jiang Xiyin;Tian Yingbin(Jining No.2 Coal Mine,Yanzhou Coal Mining Co.,Ltd.,Jining 272072,China;Tangshan Research Institute Co.,Ltd. of China Coal Technology & Engineering Group,Tangshan 063012,China)
出处
《金属矿山》
CAS
北大核心
2019年第10期101-106,共6页
Metal Mine
基金
“十三五”国家重点研发计划项目(编号:2016YFC0501105)
天地科技股份有限公司科技创新创业资金专项青年项目(编号:2018-TDQN041)
关键词
开采沉陷
概率积分法
曲线拟合
岩浆岩
地表移动观测
沉陷预计参数
Mining subsidence
Probability integral method
Curve fitting
Magmatic rock
Surface movement monitoring
Subsidence prediction parameter
作者简介
姜希印(1972—),男,总工程师,高级工程师,硕士。
