Polyurethane long-distance fast fixed-point sealing device and method for underground drilling in coal mine

Abstract

The invention provides a polyurethane long-distance rapid fixed-point hole sealing device for underground drilling of a coal mine. The polyurethane long-distance rapid fixed-point hole sealing device comprises supporting legs, a material injection barrel, a barrel cover, a pressure air connection pipe, feeding funnels, a powerless pipeline mixer, a first polyurethane foaming bag, a second polyurethane foaming bag, a pressure measuring or extraction pipe, a first material injection pipe, a second material injection pipe and a slurry injection pipe, wherein the barrel cover is horizontally arranged at the top of the material injection barrel; the material injection barrel is internally vertically provided with a separation plate for separating the inner part of the material injection barrel into a material storage chamber a and a material storage chamber b; the pressure air connection pipe and the two feeding funnels are arranged on the barrel cover; the upper end of the powerless pipeline mixer is arranged at the center of the bottom of the material injection barrel; and an inlet of the powerless pipeline mixer is communicated with the material storage chamber a and the material storage chamber b. The invention further discloses a hole sealing method. With the adoption of the polyurethane long-distance rapid fixed-point hole sealing device provided by the invention, the labor intensity of workers can be greatly alleviated; the polyurethane long-distance rapid fixed-point hole sealing device has the advantages of light weight, convenience for carrying, simplicity in operation and the like; after hole sealing work is finished, a plastic thin film in the material injection barrel is removed to finish the work, so that the procedure of washing the material injection barrel is avoided and the device is convenient and rapid.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety production, and in particular relates to a polyurethane long-distance fixed-point fast sealing device and method for underground drilling in coal mines. Background technique [0002] Drilling and sealing work is one of the most basic tasks in coal mine gas control, which involves accurate measurement of coal seam gas pressure and gas drainage effects. The size of the coal seam gas pressure can reflect the size of the gas content of the coal seam, the amount of gas gushing out, and the risk of coal and gas outburst, etc., and provide basic parameters for the mine to formulate gas prevention and control measures; in the process of gas drainage, if the hole is sealed Poor quality will cause serious gas leakage in boreholes, poor gas drainage effect, long drainage compliance period, aggravating the balance of "pumping-excavation-extraction" in mines, and will cause the concentration of gas to...

AI Technical Summary

Problems solved by technology

This method requires workers to send the polyurethane sealing material to the sealing section in a very short period of time. The operation steps are cumbersome and the workload is heavy, and due to the tight operation time, the polyurethane cannot be sent to the deep part of the drilled hole, and the It is impossible to achieve long-distance fixed-point sealing; in addition, often due to on-site workers adding material a and material b by hand, the proportion of material a and material b is not suitable, which will also affect the polyurethane foaming effect and reduce the quality of sealing holes; If the workers do not operate in time, or if there is a failure during the operation, the sealing time will be longer, causing the polyurethane to foam in advance, and it will not be possible to achieve long-distance fixed-point sealing, and the quality of the sealing will be unsatisfactory; during the sealing process, the polyurethane The mixture of material a and material b may flow out of the drill hole, and workers need to block the outflowing polyurethane by hand. Direct contact with chemical substances such as polyurethane will cause certain harm to the body.

[0004] In summary, since the existing polyurethane sealing device and method cannot achieve long-distance, fixed-point, and fast sealing, thus greatly reducing the popularization and application of this method, it is urgent to find a new device and method to solve the problem of existing polyurethane sealing. Problems with the Hole Method

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