【作者】 陈金龙；

【导师】 饶运章；

【作者基本信息】 江西理工大学 ， 工程力学， 2019， 硕士

【摘要】 以江西银海矿业上部120m隔离矿柱的高效安全开采为背景,结合现场工程地质调查,室内岩石力学试验结果,利用突变理论、强度折减法、数值模拟等研究方法,分析研究充填体下采空区顶板稳定性,和120m隔离矿柱安全开采优化方案^【1】。主要成果如下:（1）通过工程和水文地质调查及矿石力学参数测试,采用RMR和BQ方法评价矿区岩体的工程质量,获得银海矿业矿体为Ⅰ级岩体,说明质量非常好,跨度15m以内可持续稳定20年;花岗斑岩和晶屑凝灰岩为Ⅱ级岩体,说明质量较好,跨度10m以内可持续稳定1年。（2）结合GSI评价法、弹性波法、系数换算法和室内岩石物理力学试验,推荐出数值模拟岩体力学参数。（3）建立银海矿业三维数值模型,设置地表监测点,研究上部120m隔离矿柱开挖及充填对地表稳定性的影响,由8个地表点的最大地表倾斜（i）、最大地表曲率（K）和最大水平变形（ε）得知隔离矿柱开挖及充填对地表建筑物的稳定性不会产生不利影响^【2】。（4）基于突变理论和强度折减法建立尖点突变模型,推算出充填体下采空区顶板安全系数,分析研究在充填体压力下,不同顶板厚度、不同采空区高度的顶板安全系数变化情况,及顶板安全系数与顶板厚度和采空区高度的比值的关系,得出充填体下顶板安全系数随顶板厚度增大而增大,随采空区高度增大而减小,随厚高比增大而增大。（5）结合基于尖点突变理论和强度折减法的采空区稳定性研究,分析了隔离矿柱采用不同回采方案的优劣性。更多还原

【Abstract】 Based on the high-efficiency and safe mining of the upper 120 m isolation pillar of Yinhai Mining in Jiangxi Province,combined with on-site engineering geological survey and indoor rock mechanics test results,the research methods of catastrophe theory,strength reduction method and numerical simulation are used to analyze the goaf under the filling body.Roof stability,and 120 m isolation pillar safe mining optimization program.The main results are as follows:(1)Through the engineering and hydrogeological investigation and the test of mineral rock mechanics parameters,the RMR and BQ methods are used to evaluate the engineering quality of the rock mass in the mining area,and the Yinhai mining ore body is a Grade I rock mass,indicating that the quality is very good,span 15 m.It is stable for 20 years;granite porphyry and crystal tuff are II-grade rock mass,indicating good quality and stable and stable for 1 year within 10 m span.(2)Combining GSI evaluation method,elastic wave method,coefficient conversion algorithm and indoor rock physics and mechanics test,numerical simulation of rock mass mechanical parameters is recommended.(3)Establish a three-dimensional numerical model of Yinhai Mining,set up surface monitoring points,study the influence of the upper 120 m isolated pillar excavation and filling on the stability of the ground,and the maximum surface inclination(i)and maximum surface curvature of the eight surface points(K)and maximum horizontal deformation(ε)know that the isolation and filling of the isolated rock mass will not adversely affect the stability of the surface buildings.(4)Based on the catastrophe theory and strength reduction method,the cusp catastrophe model is established,and the safety factor of the roof in the goaf under the filling body is calculated.The roof safety factor of different roof thickness and height of different goafs under the pressure of the filling body is analyzed.The situation,and the relationship between the safety factor of the roof and the ratio of the thickness of the roof and the height of the goaf,it is concluded that the safety factor of the roof under the filling body increases with the thickness of the roof plate,and decreases with the height of the goaf.Increases as the ratio increases.(5)Combining the research on the stability of goaf based on cusp catastrophe theory and strength reduction method,the advantages and disadvantages of different mining schemes for isolated pillars are analyzed.更多还原