采煤工作面顺槽底板特征分析及快速硬化技术研究

发布时间：2018-02-10 08:45

本文关键词： 顺槽底板加筋格室填充材料承载力快速硬化　出处：《西安科技大学》2014年硕士论文　论文类型：学位论文

【摘要】：针对采煤工作面顺槽底板采用传统的普通混凝土硬化方式普遍存在施工速度慢、运输量大、成本高，混凝土硬化质量差以及底板路面在使用过程中破坏后维修难的问题，开展顺槽底板快速硬化技术的相关研究，主要工作和结论有：（1）在分析采煤工作面顺槽底板特征、硬化存在的问题及硬化技术要求的基础上，通过对目前国内外格室加筋、柔性混凝土及碾压混凝土等关键技术的研究，结合块体路面的结构设计方法，提出加筋格室及内部填充材料组成的顺槽底板路面的结构形式。（2）格室加筋碾压混凝土复合路面的承载机理与与传统水泥混凝土路面主要依靠路面板抗弯强度承载和沥青混凝土路面主要靠基层承载有本质区别，，其路面结构的承载机理是通过块体之间的拱效应、接缝的剪切特性来实现荷载的扩散，提高路面的抗剪强度及变形适应的能力。（3）通过对不同类型的加筋格室的力学特性及加固作用机理（侧向约束作用、摩擦作用、网兜效应）分析，指出其力学特性与其结构有关，焊距越小、高度越高、结构层强度越高，其侧向约束力越大，侧壁摩擦力也越大，网兜效应及加筋效果越好。（4）试验研究确定了满足各项性能要求的填充材料配合比。通过单体加筋格室充填体及加筋格室充填结构体承载板力学变形试验研究，进一步验证了由于加筋格室的作用，在充填材料强度较低、路面厚度较小情况下其结构仍具有较高的承载力和适应较大变形能力且扩散到基层及周围的应力很小的路面承载机理。（5）地面工业性模拟试验表明：各工序的衔接良好，施工速度比传统的提高4倍以上，承载力满足使用性能，在显著降低综合成本的同时且具有明显的社会效益，有较强的推广应用前景。
[Abstract]:In view of the problems of low construction speed, large transportation volume, high cost, poor concrete hardening quality and difficult maintenance after the destruction of the floor pavement in the process of use, the traditional common concrete hardening method used in the coal mining face along the trough floor is generally existed. The main work and conclusions are as follows:. 1) on the basis of analyzing the characteristics, problems existing in hardening and the technical requirements of hardening, the key technologies of reinforcement, flexible concrete and roller compacted concrete at home and abroad are studied. Combined with the structural design method of block pavement, the structure form of reinforced latticed chamber and inner filling material pavement with slotted bottom slab is put forward. (2) the bearing mechanism of reinforced RCC composite pavement is essentially different from that of the traditional cement concrete pavement which mainly depends on the flexural strength of the pavement face slab and the asphalt concrete pavement mainly depends on the base course. The load-bearing mechanism of pavement structure is to achieve load diffusion through arch effect between blocks and shear characteristics of joints to improve the shear strength and deformation adaptability of pavement. 3) by analyzing the mechanical properties and reinforcement mechanism (lateral restraint, friction, netting effect) of different types of reinforced latticed chambers, it is pointed out that the mechanical properties are related to its structure, and the smaller the welding distance, the higher the height. The higher the strength of the structure layer is, the greater the lateral binding force is, and the greater the friction force of the lateral wall is, the better the effect of netting and reinforcement is. (4) the experimental study determines the proportion of filling materials that meet the requirements of various properties. Through the experimental study on the bearing plate deformation of the single reinforced lattice filling body and the reinforced latticed filling structure body, it is further verified that because of the effect of the reinforced latticed chamber, When the strength of filling material is low and the thickness of pavement is small, the pavement structure still has higher bearing capacity and less stress diffusion to the base course and the surrounding pavement, which can adapt to large deformation capacity. 5) the ground industrial simulation test shows that the construction speed is more than 4 times higher than that of the traditional one, and the bearing capacity can meet the use performance, which can significantly reduce the comprehensive cost and have obvious social benefits. It has a strong prospect of popularization and application.
【学位授予单位】：西安科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.2;TD82

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