Movable bottom plate reinforced concrete support for heaving floor roadway and construction method

Abstract

The invention discloses a movable bottom plate reinforced concrete support for a heaving floor roadway and a construction method, the movable bottom plate reinforced concrete support comprises a hollow steel body, hydraulic props, concrete slurry, a fixed sliding block and a sliding steel rail, the hollow steel body is arranged at the bottom of the roadway, and a plurality of hydraulic props are arranged between the hollow steel body and the top of the roadway; the bottoms of the hydraulic props are fixedly mounted on the hollow steel body, and fixed sliding blocks are arranged at the tops of the hydraulic props; a supporting plate is arranged at the top end of the roadway, and a sliding steel rail matched with the fixed sliding block is arranged at the lower end of the supporting plate; a grouting opening and an exhaust opening are formed in the front end and the tail end of the upper end face of the hollow steel body respectively, and concrete slurry entering from the grouting opening is poured into the hollow steel body. The bottom steel-concrete structure is combined with the middle hydraulic supporting columns and the upper sliding steel rails, so that the integrity of bottom plate supporting is strengthened, the strength of bottom plate supporting is improved, moving and assembling are convenient, repeated use can be achieved, and therefore the problem of mine roadway floor heave control is solved.

Description

technical field [0001] The invention relates to the technical field of mine support engineering, in particular to a movable bottom plate steel-concrete support support structure and a construction method used in a roadway with severe kick drum. Background technique [0002] Coal is my country's basic energy and important raw material, and coal accounts for more than 90% of my country's fossil energy resources. In a long period of time, its main energy status will not change. Therefore, the coal industry is an important basic industry related to the national economic lifeline and energy security. Therefore, the safe and efficient mining of coal resources is particularly important. At present, many coal mines in the central and eastern parts of my country have entered the stage of deep mining, and the mining depth of coal mines in the western region is also increasing. The problem of floor heave in the roadway is particularly prominent. The unsupported or weak support of the...

AI Technical Summary

Problems solved by technology

At present, many coal mines in the central and eastern parts of my country have entered the deep mining stage, and the mining depth of coal mines in the western region is also increasing. It is becoming more and more obvious, and the problem of roadway floor heaving is particularly prominent. The middle floor of coal mine roadway is not supported or weakly supported, making it the weak link of roadway support, resulting in the release of surrounding rock stress and deformation of the roadway first appearing on the floor, forming a serious floor heave Phenomenon, the bottom drum will further cause the overall deformation and damage of the roadway and even the roof fall and instability, which has brought great hidden dangers to the safety production of coal mines.

[0003] In this regard, the current main treatment methods for roadway bottom drum include: undercover, anchor rod and anchor cable support, grouting reinforcement, reverse bottom arch support, but the following problems still exist for roadways with severe floor drum under complex conditions: Broken gangue on the bottom plate will treat the symptoms but not the root cause, and multiple undercovers will aggravate the deformation of the two sides of the roadway and the roof; the bolt and anchor cable support has difficulties in drilling the bottom plate, poor anchoring effect, and the bottom plate between the anchor rods and cables. problems such as covering and poor overall control effect; although grouting reinforcement can improve the strength of the surrounding rock of the floor, the degree of improvement is limited, and the bottom heave is difficult to suppress; the anti-bottom arch support has the problems of high rigidity and easy breakage, and it is extremely difficult to repair in the later stage Big

Images