Coal dust collection device and method suitable for coal mining with inert gas in underground coal mines

Abstract

The invention discloses a coal dust collecting device and method for inert gas in coal mines to draw coal and eliminate outbursts. The device includes a Venturi scrubber, a collecting box, a settling chamber and an exhaust pipe; The water supply port, slag discharge port, elbow connection port and first exhaust port for water injection in the catch box; the catch box is set at the coal dust particle output end of the Venturi scrubber, between the catch box and the Venturi scrubber It is connected through an elbow, and one end of the elbow located in the catch box can be inserted below the water surface in the catch box; the settling chamber is provided with an air inlet and a second exhaust port, and the air inlet is arranged at the lower part of the settling chamber. The second exhaust port is arranged on the upper part of the settling chamber, and the exhaust pipe is connected between the first exhaust port and the second exhaust port. The device of the invention can separate coal dust and gas, has no pollution to the roadway, does not discharge gas to the roadway, and has good safety.

Description

technical field [0001] The invention belongs to the technical field of coal mine safety, and in particular relates to a coal dust collection device and method suitable for coal mining and outburst elimination of inert gas in coal mines. Background technique [0002] Coal and gas outburst often occur under the dual effects of high gas pressure and stress concentration, and reducing local stress is the most important thing to prevent coal and gas outburst. The inert gas coal removal and outburst elimination technology is a new technology for pressure relief and outburst elimination. Its advantages are large coal output from a single hole and good pressure relief effect. However, the high-speed three-phase flow of coal powder, gas (inert gas and gas) and water will inevitably be generated during the construction process. If the capture of coal powder and the extraction of gas cannot be realized, considerable safety hazards will be caused. Hidden danger. At present, there is n...

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Problems solved by technology

[0003] The patent with the application number 201610781753.X discloses a coal dust capture device suitable for the aerodynamic acupoints of coalbed methane wells. It mainly uses the high-speed flow of the ejected gas through the Venturi effect to fully mix the gas and water, and moisten them. Coal dust, and then discharge coal powder particles through the settling chamber; since the device is set on the ground, the size of the device is less restricted, and it can be made in a large size, which can meet the effect of dust removal; but when it is used in underground coal mines, due to size restrictions , the coal dust collection effect is greatly reduced, and the device cannot effectively separate the coal seam and gas

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