三河尖矿千米深井沿空留巷围岩控制技术研究

发布时间：2018-02-01 10:26

本文关键词： 千米深井沿空留巷矿压显现特征支护阻力巷旁支护巷内支护　出处：《中国矿业大学》2015年硕士论文　论文类型：学位论文

【摘要】：以三河尖矿为研究对象,运用数值模拟、理论计算作为研究手段,并与现场实践相结合,研究了三河尖矿千米深井沿空留巷矿压显现特征,并针对性的提出巷旁支护参数、巷内支护参数、加强支护参数等,主要得到以下结论:1、千米深井沿空留巷矿压显现特征:1)随着埋深的增加,沿空留巷围岩变形量增大;2)随着埋深的增加,沿空留巷围岩应力增大。顶板应力及巷旁支护体垂直应力增加幅度随着埋深的增加变小;3)随着埋深的增加,巷道围岩塑性区范围增大;4)千米深井沿空留巷工作面后方围岩变形速度较浅部沿空留巷大得多,且千米深井沿空留巷工作面后方顶板趋于稳定需要的时间更长。2、确定采用高水材料构筑巷旁支护体进行沿空留巷。并根据高水材料巷旁支护体特点,得到巷旁支护技术。在此基础上,通过理论计算、数值模拟,确定巷旁支护体参数。3、运用数值模拟确定了三河尖矿千米深井沿空留巷巷旁支护体加固参数,并在此基础上分析巷旁支护体加固机理:高强螺纹钢对拉锚杆配合钢筋梯子梁组成的加固结构,有效提升了巷旁支护体自由面围压,增强了其抗变形能力。4、分析千米深井沿空留巷巷内支护机理,确定巷内支护技术,并结合数值模拟确定巷内支护参数、巷旁支护体上方顶板加强支护参数及工作面后方单体液压支柱加强支护参数。上述结论在三河尖矿7136工作面运输巷沿空留巷成功获得验证。
[Abstract]:Taking Sanhejian mine as the research object, using numerical simulation, theoretical calculation as the research means, and combining with the field practice, the characteristics of rock pressure behavior along the goaf roadway of the kilometer deep well in Sanhejian mine are studied. And proposed the roadway side support parameter, the roadway support parameter, strengthens the support parameter and so on, mainly obtains the following conclusion: 1, the kilometer deep well along the gob remaining roadway rock pressure behavior characteristic: 1) with the buried depth increases. The deformation of surrounding rock along goaf roadway increases; 2) with the increase of burying depth, the surrounding rock stress increases. The roof stress and vertical stress increase with the increase of buried depth. 3) with the increase of buried depth, the range of plastic zone of roadway surrounding rock increases; 4) the deformation speed of surrounding rock behind the face is much larger than that of the shallow side roadway, and the time required for the stabilization of the roof behind the working face along the goaf is much longer than that of the shallow gob side roadway, and the time required for the stabilization of the roof is longer than that of the shallow gob side roadway. It is determined that high water material is used to construct roadway side support to keep roadway along gob. According to the characteristics of high water material roadway side support, the roadway side support technology is obtained. On this basis, through theoretical calculation, numerical simulation. Determination of roadway side support parameters. 3, the use of numerical simulation to determine the Sanhejian mine depth along the goaf roadway side retaining roadway side support reinforcement parameters. And on this basis, the reinforcement mechanism of roadway side support is analyzed: the strengthening structure composed of high strength thread steel to pull anchor rod and steel ladder beam can effectively enhance the free surface confining pressure of roadway side support protector and enhance its anti-deformation ability. 4. This paper analyzes the mechanism of supporting in roadway along the gob of kilometer deep well, determines the supporting technology of roadway, and determines the parameters of support in roadway with numerical simulation. The supporting parameters above the roof of the side support and the single hydraulic prop at the rear of the working face are strengthened. The above conclusions are verified successfully in the roadway along the goaf of the transport roadway of No. 7136 working face in Sanhejian Mine.
【学位授予单位】：中国矿业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TD353

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