极松散煤层完全沿空掘巷支护技术研究
发布时间：2018-11-17 08:22
【摘要】：煤炭开采过程中实行的沿空掘巷,其发展过程包括从预留宽煤柱的沿空掘巷支护到预留窄煤柱的沿空掘巷支护,再到如今的完全沿空掘巷支护。完全沿空掘巷支护尚属新生事物,在煤矿企业中实施的不多。本文利用安徽理工大学矿山工程力学与支护研究所在淮北矿业有限公司涡北煤矿的研究课题,对完全沿空掘巷支护进行了深入探究。结合涡北煤矿复杂的地质条件和完全沿空掘巷受力的不对称型,提出了一种金属锚架增强支护技术即金属棚架+补强锚杆支护。分析了这种支护技术中金属棚架与补强锚杆的相互作用机理,整体支护技术抑制巷道变形,保持巷道稳定的原理。 本文通过力学模型理论计算和数值模拟,比较了单纯金属棚架支护、补强两排锚杆棚架支护、补强三排锚杆棚架支护的结果,得出了完全沿空掘巷实体煤侧金属棚架从拱肩到棚腿底端是其受力薄弱部位,需要进行补强支护。补强锚杆的合理确定,对于金属棚架受力具有重要意义。这种联合支护技术中金属棚架和补强锚杆的相互配合作用是保证完全沿空掘巷能够实施的重要条件。同时此次完全沿空掘巷项目的成功也为以后类似巷道的加固和支护设计提供了重要借鉴。
[Abstract]:In the process of coal mining, the development process of gob-side roadway is from the gob-side roadway support of reserved wide coal pillar to the gob-side roadway support of reserved narrow coal pillar, and then to the complete gob-side roadway support now. It is a new thing to excavate roadway completely along the goaf, and it is not carried out much in coal mining enterprise. Based on the research topic of Anhui University of Technology Institute of Mine Engineering Mechanics and support in Wupi Coal Mine of Huaibei Mining Co. Ltd., this paper makes a deep research on the complete gob-side roadway support. Based on the complex geological conditions and the asymmetrical type of roadway driving along the goaf, a kind of metal bolting reinforcement support technology, that is, bolting with metal scaffold, is put forward in this paper. The interaction mechanism between the metal scaffold and the reinforced bolt in this support technology is analyzed. The principle that the integral support technology can restrain the roadway deformation and keep the roadway stable is analyzed. Based on the theoretical calculation and numerical simulation of mechanical model, this paper compares the results of simple metal scaffold support, reinforcement of two rows of bolting scaffolding, and reinforcement of three rows of bolting scaffolding. It is concluded that the metal scaffold of solid coal side is the weak position from the arch shoulder to the bottom end of the shack leg, which needs to be reinforced. The reasonable determination of reinforcing bolt is of great significance to the stress of metal scaffolding. In this kind of combined support technology, the interaction of metal scaffolding and reinforcing bolt is an important condition to ensure the complete gob driving roadway can be carried out. At the same time, the success of the project provides an important reference for the reinforcement and support design of similar roadways in the future.
【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】：TD353
本文编号：2337119
[Abstract]:In the process of coal mining, the development process of gob-side roadway is from the gob-side roadway support of reserved wide coal pillar to the gob-side roadway support of reserved narrow coal pillar, and then to the complete gob-side roadway support now. It is a new thing to excavate roadway completely along the goaf, and it is not carried out much in coal mining enterprise. Based on the research topic of Anhui University of Technology Institute of Mine Engineering Mechanics and support in Wupi Coal Mine of Huaibei Mining Co. Ltd., this paper makes a deep research on the complete gob-side roadway support. Based on the complex geological conditions and the asymmetrical type of roadway driving along the goaf, a kind of metal bolting reinforcement support technology, that is, bolting with metal scaffold, is put forward in this paper. The interaction mechanism between the metal scaffold and the reinforced bolt in this support technology is analyzed. The principle that the integral support technology can restrain the roadway deformation and keep the roadway stable is analyzed. Based on the theoretical calculation and numerical simulation of mechanical model, this paper compares the results of simple metal scaffold support, reinforcement of two rows of bolting scaffolding, and reinforcement of three rows of bolting scaffolding. It is concluded that the metal scaffold of solid coal side is the weak position from the arch shoulder to the bottom end of the shack leg, which needs to be reinforced. The reasonable determination of reinforcing bolt is of great significance to the stress of metal scaffolding. In this kind of combined support technology, the interaction of metal scaffolding and reinforcing bolt is an important condition to ensure the complete gob driving roadway can be carried out. At the same time, the success of the project provides an important reference for the reinforcement and support design of similar roadways in the future.
【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】：TD353
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