恒源煤矿巷道围岩稳定性分类及应用
发布时间：2018-09-05 09:56
【摘要】：为解决恒源煤矿开采深度逐渐增加,带来的地应力大、围岩破碎等问题,本文综合分析了恒源煤矿6条回采巷道、4条准备巷道和1条开拓巷道基本信息及巷道围岩变形原因并运用模糊聚类和巷道顶板、底板、两帮的综合强度σD、σd、σs与采动应力的比值Si按一定权值乘积之和的数学方法分别对恒源煤矿回采巷道及准备巷道围岩稳定性进行分类,并在回采巷道围岩稳定性分类的基础上提出了不同分类巷道的支护控制原则,在准备巷道围岩稳定性分类的基础上,进行了次分类和亚分类。 对恒源煤矿典型回采巷道、准备巷道支护参数利用数值模拟进行了优化分析。结果表明：(1)通过增加支护体的支护密度和间排距,可以有效的增加巷道的稳定性并且较为有效的控制围岩变形量。风巷顶底板总位移量减少了45%,机巷顶底板总位移量减少了47%。(2)巷道顶底板变形量要大于两帮移近量。应力升高区应力集中系数为2.36-2.78。(3)随着工作面推进,巷道的顶底板位移量逐渐增大,在原有支护条件下,加强支护强度,可以有效的减少顶底板移近量和两帮移近量。增加支护强度后,顶底板位移量减少了51%。 将以上研究成果进行了工业性实验,支护效果良好,围岩得到有效控制,满足安全生产要求。可对恒源煤矿相关地质条件下巷道支护设计提供有益参考。
[Abstract]:In order to solve the problem that the mining depth of Hengyuan coal mine increases gradually, the ground stress is large, the surrounding rock is broken and so on. In this paper, the basic information of 6 mining roadways in Hengyuan coal mine, 4 preparatory roadways and 1 open roadway, and the reasons of surrounding rock deformation of roadway are comprehensively analyzed, and the fuzzy clustering and roadway roof and floor are used. The comprehensive strength 蟽 D, 蟽 d, 蟽 s and the ratio of mining stress to mining stress of the two sides Si are classified according to the mathematical method of the sum of certain weights, respectively, for the stability of the roadway and the surrounding rock of the preparatory roadway in Hengyuan Coal Mine. Based on the classification of the stability of the surrounding rock in the mining roadway, the supporting control principle of the roadway with different classification is put forward. On the basis of preparing the classification of the stability of the surrounding rock of the roadway, the sub-classification and sub-classification are carried out. This paper optimizes and analyzes the support parameters of the typical mining roadway in Hengyuan Coal Mine by numerical simulation. The results are as follows: (1) the stability of roadway can be effectively increased and the deformation of surrounding rock can be controlled effectively by increasing the support density and spacing. The total displacement of the roof and bottom plate of the wind tunnel is reduced by 45%, and the total displacement of the roof and floor plate of the machine roadway is reduced by 47%. (2) the deformation of the roof and floor plate of the roadway is larger than that of the two sides. The stress concentration factor is 2.36-2.78. (3) with the advance of the working face, the displacement of roadway roof and floor gradually increases. Under the original support condition, strengthening the support strength can effectively reduce the roof and floor movement and the two sides. After increasing the support strength, the displacement of roof and floor reduces 51%. The industrial experiments show that the supporting effect is good and the surrounding rock is effectively controlled to meet the requirements of safe production. It can provide useful reference for roadway support design under related geological conditions of Hengyuan Coal Mine.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD322.4
本文编号：2223929
[Abstract]:In order to solve the problem that the mining depth of Hengyuan coal mine increases gradually, the ground stress is large, the surrounding rock is broken and so on. In this paper, the basic information of 6 mining roadways in Hengyuan coal mine, 4 preparatory roadways and 1 open roadway, and the reasons of surrounding rock deformation of roadway are comprehensively analyzed, and the fuzzy clustering and roadway roof and floor are used. The comprehensive strength 蟽 D, 蟽 d, 蟽 s and the ratio of mining stress to mining stress of the two sides Si are classified according to the mathematical method of the sum of certain weights, respectively, for the stability of the roadway and the surrounding rock of the preparatory roadway in Hengyuan Coal Mine. Based on the classification of the stability of the surrounding rock in the mining roadway, the supporting control principle of the roadway with different classification is put forward. On the basis of preparing the classification of the stability of the surrounding rock of the roadway, the sub-classification and sub-classification are carried out. This paper optimizes and analyzes the support parameters of the typical mining roadway in Hengyuan Coal Mine by numerical simulation. The results are as follows: (1) the stability of roadway can be effectively increased and the deformation of surrounding rock can be controlled effectively by increasing the support density and spacing. The total displacement of the roof and bottom plate of the wind tunnel is reduced by 45%, and the total displacement of the roof and floor plate of the machine roadway is reduced by 47%. (2) the deformation of the roof and floor plate of the roadway is larger than that of the two sides. The stress concentration factor is 2.36-2.78. (3) with the advance of the working face, the displacement of roadway roof and floor gradually increases. Under the original support condition, strengthening the support strength can effectively reduce the roof and floor movement and the two sides. After increasing the support strength, the displacement of roof and floor reduces 51%. The industrial experiments show that the supporting effect is good and the surrounding rock is effectively controlled to meet the requirements of safe production. It can provide useful reference for roadway support design under related geological conditions of Hengyuan Coal Mine.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD322.4
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