Measuring system and method for hydraulic reaming to relieve pressure, increase permeability and increase coal expansion

Abstract

The invention relates to a metering system and method for hydraulic reaming pressure-relief permeability-enhancing reaming coal quantity. The system comprises tracks laid in a roadway, a tramcar moving along the tracks, a drilling machine and high-pressure pump system arranged in the roadway, a slurry colleting barrel and a filtering barrel arranged at one side of the slurry colleting barrel. The drilling machine and high-pressure pump system is in transmission connection with a reaming drill rod and a drill bit, a water suction pump is arranged on the upper portion of one side of the slurry collecting barrel, and a manual coal conveying device is obliquely arranged in the slurry collecting barrel. The method includes the following steps that two filtering barrels are manufactured and machined; water coal slurry is collected and precipitated; water in the slurry collecting barrel is drained; coal particles are precipitated, and water is drained; coal slime and powdered coal are collected; the water and the coal are separated; the reaming coal quantity is calculated. The metering system can collect the coal slime fast, separate the water and the coal, accurately meter the reaming coal quantity, improve the operation environment, improve the metering precision, improve the accurate inspection of hydraulic reaming coal quantity, ensure the reaming pressure-relief permeability-enhancing effect and the gas pre-drainage effect and guarantee safety production of a coal mine.

Description

technical field [0001] The invention belongs to the technical field of coal mine gas disaster prevention and control, and in particular relates to a metering system and a metering method for hydraulic hole reaming, pressure relief, permeability enhancement and coal expansion. Background technique [0002] my country is the largest producer and consumer of raw coal in the world, and it is also the country with the most serious coal mine disasters. Gas, coal dust, water, fire, and roof accidents occur from time to time. Among all kinds of coal mine disasters, coal mine gas disasters are particularly serious. A large number of gas accidents occur every year, and it is easy to cause mass casualties such as gas outbursts and gas explosions, which have caused serious economic burdens and bad social impacts on enterprises. . [0003] Gas occurrence in most coal seams in my country has the characteristics of low gas permeability, high gas content and high pressure. In particular, ...

AI Technical Summary

Problems solved by technology

These methods have complex operation procedures and need to install blowout prevention devices at the opening of the construction drilling in advance, which cannot realize the rapid and automatic separation of the reaming water body and the reaming spalled coal body, making the workplace full of coal-water slurry, and the working environment is harsh , which is not conducive to safe production; at the same time, the measurement speed of this method is slow, the error of the measurement value is large, and the amount of coal expansion cannot be accurately inspected; and this method cannot collect a large amount of pulverized coal produced in the process of hole expansion, which also greatly reduces the measurement accuracy

Images