Deep high-temperature rock stratum roadway heat insulation supporting system and construction method thereof

Abstract

The invention discloses a deep high-temperature rock stratum roadway heat insulation supporting system and a construction method thereof. The deep high-temperature rock stratum roadway heat insulation supporting system comprises a grouting heat insulation system, a high-strength supporting system and a temperature detection system, wherein the three systems are connected through an integral connecting device; the grouting heat insulation system is characterized in that a heat insulation grouting material is injected into a hollow grouting anchor rod driven into an anchor rod hole and then overflows and diffuses to surrounding broken rock mass, and an outer-layer heat insulation supporting ring is formed; the high-strength supporting system is characterized in that a heat-resistant metal net, a high-strength support and a heat insulation guniting layer are sequentially laid on the surface of roadway surrounding rock, and an inner-layer heat insulation supporting ring is formed; and the temperature detection system is characterized in that a temperature sensor penetrates through a rigid protective sleeve inserted into a temperature measuring hole to reach a designated position for temperature measuring, and readings are displayed on a control host. The long-term heat insulation requirement of a roadway can be met, the high-strength supporting requirement of the roadway can also be met, the construction risk is reduced, the construction cost is saved, and a guarantee is provided for safe and smooth operation of the deep roadway in the whole life cycle.

Description

technical field [0001] The invention belongs to the technical field of disaster prevention and reduction in underground engineering, and in particular relates to a thermal insulation support system suitable for deep high-temperature rock formation roadways and a construction method thereof. Background technique [0002] The statements in this section merely provide background information related to the present invention and do not necessarily constitute prior art. [0003] Coal, iron ore, gold ore and other mining resources, as the main energy source in our country, have made great contributions to the rapid development of industry. In recent years, my country's shallow resources have been increasingly depleted, and energy demand has gradually increased, making deep mine mining a trend of normalization. However, deep mining also exposed some difficult technical problems. Academician Xie Heping once pointed out that "high ground stress, high ground temperature, and high seep...

AI Technical Summary

Problems solved by technology

However, it is difficult for this device to effectively isolate the radiant heat energy generated by the surrounding rock of the deep roadway with only one layer of vacuum support board, and the box-shaped cavity inside the vacuum support board needs to be evacuated and dehumidified with a vacuum pump, which is time-consuming and labor-intensive. ; 2. A system and method for supporting and cooling heat-damaged mine roadway (the application number is CN201710017712.8). The return pipe is connected to form a loop, and the heat exchange medium can circulate in the loop to continuously exchange heat with the surrounding rock of the roadway to reduce the temperature of the surrounding rock

However, the system adopts a mechanical circulation refrigeration method, the equipment operation and maintenance costs are too high, and the manufacturing process of the hollow cooling anchor is complicated, and it is necessary to reserve space for the branch cooling pipe and the branch return pipe, which will weaken the hollow cooling anchor. Support strength; 3. A thermal insulation lining structure and construction method for deep high-temperature roadway (application number is CN201710408796.8). The first lining heat insulation layer forms a primary support, and the secondary lining heat insulation layer is applied after the deformation of the roadway is stable

Although this structure forms a multi-layer heat insulation structure, it also meets the requirements of roadway support. However, for some roadways with long service life, the support structure will be damaged or damaged to a certain extent under the influence of mining. 4. A heat insulation device for mine roadway and its construction method (application number is CN201911161944.6), the device uses solid waste The heat insulation formwork is fixed on the surrounding rock by anchor cables and anchor rods, the concrete layer is sprayed on the outer wall of the solid waste heat insulation formwork, and a temperature sensor is installed to calculate the thickness of the solid waste heat insulation formwork prototype

The device uses 50% of the anchoring pre-tightening force during the construction process, which can solve the problem of high pre-tightening force support failure and separation of heat-insulating formwork and surrounding rock when the roadway is deformed. However, the heat-insulating formwork cannot go deep into the roadway surrounding The deep part of the rock is used to seal the cracks of the broken rock mass, and for the deep strong rheological soft rock roadway, the support structure will still fail, and it is difficult to repair

[0007] In summary, the current deep roadway thermal insulation support system has a certain effect, but there are still some defects, and it is still unable to effectively solve the symbiosis problem of deep roadway high temperature heat damage and support for a long time

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